add gl and example

examples/graph-definition.xml

@@ -1,5 +0,0 @@
-<graph>
-    <box diameter="10" position="[33, 40, 3]">
-
-    </box>
-</graph>

settings.gradle

@@ -2,4 +2,5 @@ rootProject.name = 'threedom'
 
 include 'threedom-kapt'
 include 'threedom'
-
+include 'threedom-gl'
+include 'threedom-example'

threedom-example/build.gradle

@@ -0,0 +1,67 @@
+import org.gradle.internal.os.OperatingSystem
+
+plugins {
+    id 'org.jetbrains.kotlin.jvm' version '1.3.72'
+    id 'java'
+    id 'application'
+}
+
+group 'me.eater.threedom'
+version '1.0-SNAPSHOT'
+
+switch (OperatingSystem.current()) {
+	case OperatingSystem.LINUX:
+		project.ext.lwjglNatives = "natives-linux"
+		break
+	case OperatingSystem.MAC_OS:
+		project.ext.lwjglNatives = "natives-macos"
+		break
+	case OperatingSystem.WINDOWS:
+		project.ext.lwjglNatives = "natives-windows"
+		break
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+    implementation platform("org.lwjgl:lwjgl-bom:3.2.3")
+
+    implementation project(":threedom")
+    implementation project(":threedom-gl")
+
+    implementation "org.lwjgl:lwjgl"
+    implementation "org.lwjgl:lwjgl-opengl"
+    implementation "org.lwjgl:lwjgl-glfw"
+
+    implementation 'org.joml:joml:1.9.24'
+
+    runtimeOnly "org.lwjgl:lwjgl::$lwjglNatives"
+	runtimeOnly "org.lwjgl:lwjgl-glfw::$lwjglNatives"
+    runtimeOnly "org.lwjgl:lwjgl-opengl::$lwjglNatives"
+    runtimeOnly "org.lwjgl:lwjgl-stb::$lwjglNatives"
+}
+
+application {
+    mainClassName = 'me.eater.threedom.example.MainKt'
+}
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "12"
+}
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "12"
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_12
+    targetCompatibility = JavaVersion.VERSION_12
+}
+
+
+run {
+
+    jvmArgs("-javaagent:$projectDir/../tools/lwjglx-debug-1.0.0.jar")
+}

threedom-example/src/main/kotlin/me/eater/threedom/example/main.kt

@@ -0,0 +1,251 @@
+package me.eater.threedom.example
+
+import me.eater.threedom.dom.Document
+import me.eater.threedom.dom.IDocument
+import me.eater.threedom.dom.PlainNode
+import me.eater.threedom.dom.createNode
+import me.eater.threedom.example.shader.Plain
+import me.eater.threedom.example.vertex.Simple
+import me.eater.threedom.gl.GL
+import me.eater.threedom.gl.ShaderPreProcessor
+import me.eater.threedom.gl.dom.PerspectiveCamera
+import me.eater.threedom.gl.dom.TriMesh
+import me.eater.threedom.gl.texture.Texture
+import me.eater.threedom.gl.vertex.VertexArrayObject
+import me.eater.threedom.gl.vertex.VertexBuffer
+import me.eater.threedom.utils.joml.toFloat
+import me.eater.threedom.utils.joml.translation
+import me.eater.threedom.utils.joml.vec3
+import org.joml.Vector2f
+import org.joml.Vector3f
+import org.lwjgl.glfw.GLFW.*
+import org.lwjgl.glfw.GLFWErrorCallback
+import org.lwjgl.opengl.GL.createCapabilities
+import org.lwjgl.opengl.GL11.*
+import org.lwjgl.system.MemoryStack.stackPush
+import org.lwjgl.system.MemoryUtil.NULL
+import java.time.Instant
+import kotlin.math.PI
+import kotlin.math.cos
+import kotlin.math.sin
+
+fun main() {
+    GLFWErrorCallback.createPrint(System.err).set()
+
+    if (!glfwInit()) {
+        println("Unable to initialize GLFW")
+        return
+    }
+
+    glfwDefaultWindowHints()
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4)
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 4)
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE)
+
+    val window = glfwCreateWindow(300, 300, "Hello world", NULL, NULL)
+    if (window == NULL) {
+        println("Failed creating window")
+        return
+    }
+
+    val stack = stackPush()
+    val pWidth = stack.mallocInt(1)
+    val pHeight = stack.mallocInt(1)
+
+    // Get the window size passed to glfwCreateWindow
+    glfwGetWindowSize(window, pWidth, pHeight)
+
+    // Get the resolution of the primary monitor
+    val vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor()) ?: return
+
+    // Center the window
+    glfwSetWindowPos(
+        window,
+        (vidmode.width() - pWidth.get(0)) / 2,
+        (vidmode.height() - pHeight.get(0)) / 2
+    )
+
+
+    // Make the OpenGL context current
+    glfwMakeContextCurrent(window)
+
+    var width = pWidth.get(0)
+    var height = pHeight.get(0)
+
+    // Enable v-sync
+    glfwSwapInterval(1)
+    glfwShowWindow(window)
+    createCapabilities()
+
+    val doc: IDocument = Document()
+
+    val triMesh = doc.createNode<TriMesh>()
+
+    val preProcessor = ShaderPreProcessor.createDefault()
+
+    val mesh = listOf(
+        -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
+        0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
+        0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
+        0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
+        -0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
+        -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
+
+        -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
+        0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
+        0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
+        0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
+        -0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
+        -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
+
+        -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
+        -0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
+        -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
+        -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
+        -0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
+        -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
+
+        0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
+        0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
+        0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
+        0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
+        0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
+        0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
+
+        -0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
+        0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
+        0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
+        0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
+        -0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
+        -0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
+
+        -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
+        0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
+        0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
+        0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
+        -0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
+        -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f
+    )
+
+    val buffer = mesh
+        .chunked(6)
+        .map {
+            Simple().apply {
+                position = vec3(it[0], it[1], it[2])
+                normal = vec3(it[3], it[4], it[5])
+            }
+        }
+        .let {
+            VertexBuffer(it)
+        }
+
+    val VAO = VertexArrayObject {
+        buffer(Simple::position)
+        buffer(Simple::normal)
+    }
+
+    triMesh.mesh = VAO
+    println("Loading mesh")
+    println("Loading shader program")
+    val plainShader = Plain.load(preProcessor)
+    val lampShader = Plain.lamp(preProcessor)
+
+    val texture = Texture()
+    texture.load(Simple::class.java.getResourceAsStream("/textures/fujiwara.jpg").readAllBytes())
+    plainShader.apply {
+        objectColor = vec3(1.0, 0.5, 0.0)
+        lightColor = vec3(1.0, 1.0, 1.0)
+    }
+
+    triMesh.use(lampShader)
+
+    val empty = doc.createNode<PlainNode>()
+
+    doc.addNode(empty)
+    empty.addNode(triMesh)
+
+    val around = mutableListOf<TriMesh>()
+
+    val amount = 3
+    val deg = (PI * 2) / amount
+    for (i in 0 until amount) {
+        val trimeshDup = triMesh.clone()
+        trimeshDup.use(plainShader)
+        around.add(trimeshDup)
+        triMesh.addNode(trimeshDup)
+
+        trimeshDup.model {
+            translate(2 * sin(deg * i), 0.0, 2 * cos(deg * i))
+        }
+    }
+
+    val camera = doc.createNode<PerspectiveCamera>()
+    doc.addNode(camera)
+
+    glfwSetFramebufferSizeCallback(window) { _, newWidth, newHeight ->
+        glViewport(0, 0, newWidth, newHeight)
+
+        camera.width = newWidth.toDouble()
+        camera.height = newHeight.toDouble()
+    }
+
+    glfwSetKeyCallback(window) { _, key, _, action, _ ->
+        if ((key == GLFW_KEY_Q || key == GLFW_KEY_ESCAPE) && action == GLFW_RELEASE)
+            glfwSetWindowShouldClose(window, true)
+
+
+        var z = 0.0
+        var x = 0.0
+        val speed = 0.1
+        if (key == GLFW_KEY_UP && action != GLFW_RELEASE) {
+            z += speed
+        }
+
+        if (key == GLFW_KEY_DOWN && action != GLFW_RELEASE) {
+            z -= speed
+        }
+
+        if (key == GLFW_KEY_LEFT && action != GLFW_RELEASE) {
+            x += speed
+        }
+
+        if (key == GLFW_KEY_RIGHT && action != GLFW_RELEASE) {
+            x -= speed
+        }
+
+        if (x != 0.0 || z != 0.0) {
+            camera.model {
+                translateLocal(x, 0.0, z)
+            }
+        }
+    }
+
+    println("Starting render loop")
+    glClearColor(0.3f, 0.2f, 0.2f, 1.0f)
+    glEnable(GL_DEPTH_TEST)
+    while (!glfwWindowShouldClose(window)) {
+        glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT)
+
+        empty.model {
+            setTranslation(0.0, 0.0, sin(Instant.now().toEpochMilli().toDouble() / 1000) - 3)
+        }
+
+        triMesh.model {
+            rotateY(0.005)
+        }
+
+        around.forEach {
+            it.model {
+                rotateY(-0.005)
+            }
+        }
+
+        plainShader.lightPos = triMesh.absolute.translation.toFloat()
+        plainShader.viewPos  = camera.absolute.translation.toFloat()
+        doc.render(GL, camera)
+
+        glfwSwapBuffers(window)
+        glfwPollEvents()
+    }
+}
+

threedom-example/src/main/kotlin/me/eater/threedom/example/shader/Plain.kt

@@ -0,0 +1,60 @@
+package me.eater.threedom.example.shader
+
+import me.eater.threedom.gl.Shader
+import me.eater.threedom.gl.ShaderPreProcessor
+import me.eater.threedom.gl.ShaderProgram
+
+class Plain private constructor(vertexShader: Shader, fragmentShader: Shader) :
+    ShaderProgram(vertexShader, fragmentShader) {
+
+    var objectColor by vec3()
+    var lightColor by vec3()
+    var lightPos by vec3()
+    var viewPos by vec3()
+
+    companion object {
+        fun load(preProcessor: ShaderPreProcessor): Plain {
+            val vertex = preProcessor.compile(
+                this::class.java.getResourceAsStream("/shaders/plain/vertex.glsl").readAllBytes()
+                    .toString(Charsets.UTF_8),
+                Shader.ShaderType.Vertex
+            )
+
+            val fragment = preProcessor.compile(
+                this::class.java.getResourceAsStream("/shaders/plain/fragment.glsl").readAllBytes()
+                    .toString(Charsets.UTF_8),
+                Shader.ShaderType.Fragment
+
+            )
+            return Plain(
+                vertex,
+                fragment
+            ).also {
+                vertex.delete()
+                fragment.delete()
+            }
+        }
+
+        fun lamp(preProcessor: ShaderPreProcessor): Plain {
+            val vertex = preProcessor.compile(
+                this::class.java.getResourceAsStream("/shaders/plain/vertex.glsl").readAllBytes()
+                    .toString(Charsets.UTF_8),
+                Shader.ShaderType.Vertex
+            )
+
+            val fragment = preProcessor.compile(
+                this::class.java.getResourceAsStream("/shaders/plain/fragment_lamp.glsl").readAllBytes()
+                    .toString(Charsets.UTF_8),
+                Shader.ShaderType.Fragment
+
+            )
+            return Plain(
+                vertex,
+                fragment
+            ).also {
+                vertex.delete()
+                fragment.delete()
+            }
+        }
+    }
+}

threedom-example/src/main/kotlin/me/eater/threedom/example/vertex/Simple.kt

@@ -0,0 +1,8 @@
+package me.eater.threedom.example.vertex
+
+import me.eater.threedom.gl.vertex.VertexData
+
+class Simple : VertexData() {
+    var position by vec3()
+    var normal by vec3()
+}

threedom-example/src/main/resources/shaders/plain/fragment.glsl

@@ -0,0 +1,32 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec3 FragPos;
+in vec3 Normal;
+in vec3 LightPos;   // extra in variable, since we need the light position in view space we calculate this in the vertex shader
+
+uniform vec3 lightColor;
+uniform vec3 objectColor;
+
+void main()
+{
+    // ambient
+    float ambientStrength = 0.1;
+    vec3 ambient = ambientStrength * lightColor;
+
+     // diffuse
+    vec3 norm = normalize(Normal);
+    vec3 lightDir = normalize(LightPos - FragPos);
+    float diff = max(dot(norm, lightDir), 0.0);
+    vec3 diffuse = diff * lightColor;
+
+    // specular
+    float specularStrength = 0.5;
+    vec3 viewDir = normalize(-FragPos); // the viewer is always at (0,0,0) in view-space, so viewDir is (0,0,0) - Position => -Position
+    vec3 reflectDir = reflect(-lightDir, norm);
+    float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
+    vec3 specular = specularStrength * spec * lightColor;
+
+    vec3 result = (ambient + diffuse + specular) * objectColor;
+    FragColor = vec4(result, 1.0);
+}

threedom-example/src/main/resources/shaders/plain/fragment_lamp.glsl

@@ -0,0 +1,7 @@
+#version 330 core
+
+out vec4 FragColor;
+
+void main() {
+    FragColor = vec4(1.0);
+}

threedom-example/src/main/resources/shaders/plain/vertex.glsl

@@ -0,0 +1,21 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+
+out vec3 FragPos;
+out vec3 Normal;
+out vec3 LightPos;
+
+uniform vec3 lightPos; // we now define the uniform in the vertex shader and pass the 'view space' lightpos to the fragment shader. lightPos is currently in world space.
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    gl_Position = projection * view * model * vec4(aPos, 1.0);
+    FragPos = vec3(view * model * vec4(aPos, 1.0));
+    Normal = mat3(transpose(inverse(view * model))) * aNormal;
+    LightPos = vec3(view * vec4(lightPos, 1.0)); // Transform world-space light position to view-space light position
+}

threedom-gl/build.gradle

@@ -0,0 +1,37 @@
+plugins {
+    id 'org.jetbrains.kotlin.jvm' version '1.3.72'
+    id 'java'
+}
+
+group 'me.eater.threedom'
+version '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation platform("org.lwjgl:lwjgl-bom:3.2.3")
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+    implementation "org.jetbrains.kotlin:kotlin-reflect"
+    implementation project(":threedom")
+
+    implementation 'org.joml:joml:1.9.24'
+    implementation "org.lwjgl:lwjgl"
+    implementation "org.lwjgl:lwjgl-opengl"
+    implementation "org.lwjgl:lwjgl-stb"
+}
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "12"
+}
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "12"
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_12
+    targetCompatibility = JavaVersion.VERSION_12
+}
+

threedom-gl/src/main/kotlin/me/eater/threedom/gl/GL.kt

@@ -0,0 +1,11 @@
+package me.eater.threedom.gl
+
+import me.eater.threedom.dom.render.IRenderTarget
+import me.eater.threedom.gl.dom.ICamera
+import org.lwjgl.system.MemoryStack
+import org.lwjgl.system.MemoryStack.stackPush
+
+object GL : IRenderTarget<ICamera<*>> {
+    override val type = "GL"
+    val stack: MemoryStack = stackPush()
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/Shader.kt

@@ -0,0 +1,32 @@
+package me.eater.threedom.gl
+
+import me.eater.threedom.gl.GL.stack
+import me.eater.threedom.gl.exception.ShaderCompilationException
+import org.lwjgl.opengl.GL20.*
+import org.lwjgl.system.MemoryUtil
+
+data class Shader(val shaderId: Int, val shaderType: ShaderType) {
+    enum class ShaderType(val glId: Int) {
+        Fragment(GL_FRAGMENT_SHADER),
+        Vertex(GL_VERTEX_SHADER);
+    }
+
+    fun delete() {
+        glDeleteShader(shaderId)
+    }
+
+    companion object {
+        fun create(source: String, shaderType: ShaderType): Shader {
+            val shaderId = glCreateShader(shaderType.glId)
+            glShaderSource(shaderId, source)
+            glCompileShader(shaderId)
+            val success = stack.mallocInt(1)
+            glGetShaderiv(shaderId, GL_COMPILE_STATUS, success)
+            if (success.get(0) == 0) {
+                throw ShaderCompilationException(glGetShaderInfoLog(shaderId))
+            }
+
+            return Shader(shaderId, shaderType)
+        }
+    }
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/ShaderPreProcessor.kt

@@ -0,0 +1,46 @@
+package me.eater.threedom.gl
+
+class ShaderPreProcessor {
+    private val regex = Regex("(?<module>[^:]+)::(?<call>[^:(]+)\\((?<args>.+)\\)")
+    private val calls: MutableMap<Pair<String, String>, (List<String>) -> String> = mutableMapOf()
+
+    fun process(input: String): String =
+        input.split("\n").joinToString("\n") {
+            if (it.startsWith("#[") && it.endsWith("]")) {
+                val macro = it.substring(2 until it.length - 1)
+                val match = regex.find(macro) ?: return@joinToString it
+                val module = match.groups["module"]!!.value
+                val call = match.groups["call"]!!.value
+                val args = match.groups["args"]!!.value.split(",").map { arg -> arg.trim() }.toList()
+
+                calls[module to call]?.invoke(args) ?: throw RuntimeException("Can't find macro $module::$call")
+            } else {
+                it
+            }
+        }
+
+    fun register(module: String, call: String, block: (List<String>) -> String) {
+        calls[module to call] = block
+    }
+
+    fun compile(source: String, type: Shader.ShaderType): Shader {
+        return Shader.create(process(source), type)
+    }
+
+    companion object {
+        fun createDefault() = ShaderPreProcessor().apply {
+            register("3dom", "import") { it ->
+                val knownUniforms = mapOf(
+                    "model" to "mat4",
+                    "view" to "mat4",
+                    "projection" to "mat4",
+                    "normalModel" to "mat3"
+                )
+
+                it.joinToString("\n") { uni ->
+                    "uniform ${knownUniforms[uni]} $uni;"
+                }
+            }
+        }
+    }
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/ShaderProgram.kt

@@ -0,0 +1,220 @@
+package me.eater.threedom.gl
+
+import me.eater.threedom.gl.GL.stack
+import me.eater.threedom.gl.dom.ICamera
+import me.eater.threedom.gl.exception.ShaderProgramLinkingException
+import me.eater.threedom.gl.texture.Texture
+import me.eater.threedom.utils.joml.toFloat
+import org.joml.*
+import org.lwjgl.opengl.GL20.*
+import org.lwjgl.system.MemoryUtil
+import kotlin.properties.ReadWriteProperty
+import kotlin.reflect.KProperty
+
+open class ShaderProgram(private val programId: Int = glCreateProgram()) {
+    private val uniforms: MutableMap<String, Int> = mutableMapOf()
+    val queuedUniformValues: MutableMap<Int, () -> Unit> = mutableMapOf()
+    private val textures: MutableMap<Int, Int> = mutableMapOf()
+    private var textureIndex: Int = 0
+
+    var model by mat4()
+    var normalModel by mat3()
+    var view by mat4()
+    var projection by mat4()
+
+    private fun getUniformLocation(name: String) = uniforms.getOrPut(name) {
+        glGetUniformLocation(programId, name)
+    }
+
+    protected fun sampler2D(
+        index: Int = textureIndex++,
+        name: String? = null
+    ): ReadWriteProperty<ShaderProgram, Texture?> {
+        var setUniform = false
+
+        return object : ReadWriteProperty<ShaderProgram, Texture?> {
+            override fun getValue(thisRef: ShaderProgram, property: KProperty<*>): Texture? {
+                return Texture.getTexture(textures[index] ?: return null)
+            }
+
+            override fun setValue(thisRef: ShaderProgram, property: KProperty<*>, value: Texture?) {
+                textures[index] = value?.id ?: 0
+
+                if (setUniform) {
+                    return
+                }
+
+                val loc = getUniformLocation(name ?: property.name)
+                if (loc == -1) {
+                    return
+                }
+
+                if (glGetInteger(GL_CURRENT_PROGRAM) == thisRef.programId) {
+                    glUniform1i(loc, index)
+                } else {
+                    queuedUniformValues[loc] = {
+                        glUniform1i(loc, index)
+                    }
+                }
+
+                setUniform = true
+            }
+        }
+    }
+
+    protected fun <T> uniform(
+        name: String? = null,
+        setter: (location: Int, value: T) -> Unit,
+        getter: (programId: Int, location: Int) -> T?
+    ) = UniformProperty(name, setter, getter)
+
+    open class UniformProperty<T>(
+        val name: String? = null,
+        val setter: (location: Int, value: T) -> Unit,
+        val getter: (programId: Int, location: Int) -> T?
+    ) {
+        operator fun getValue(thisRef: ShaderProgram, property: KProperty<*>): T? {
+            val loc = thisRef.getUniformLocation(name ?: property.name)
+            if (loc == -1) {
+                return null
+            }
+
+            return getter(thisRef.programId, loc)
+        }
+
+        operator fun setValue(thisRef: ShaderProgram, property: KProperty<*>, value: T?) {
+            val valueNonNull = value ?: return
+
+            val loc = thisRef.getUniformLocation(name ?: property.name)
+            if (loc == -1) {
+                return
+            }
+
+
+            if (glGetInteger(GL_CURRENT_PROGRAM) == thisRef.programId) {
+                setter(loc, valueNonNull)
+            } else {
+                thisRef.queuedUniformValues[loc] = {
+                    setter(loc, valueNonNull)
+                }
+            }
+        }
+    }
+
+    protected fun float(name: String? = null): UniformProperty<Float> =
+        uniform(name, ::glUniform1f, ::glGetUniformf)
+
+    protected fun int(name: String? = null): UniformProperty<Int> =
+        uniform(name, ::glUniform1i, ::glGetUniformi)
+
+    protected fun vec2(name: String? = null): UniformProperty<Vector2fc> =
+        uniform(name, { loc, value ->
+            val floatArray = MemoryUtil.memAllocFloat(2)
+            value.get(floatArray)
+            glUniform2fv(loc, floatArray)
+            MemoryUtil.memFree(floatArray)
+        }, { programId, location ->
+            val buffer = FloatArray(2)
+            glGetUniformfv(programId, location, buffer)
+            Vector2f().set(buffer)
+        })
+
+    protected fun vec3(name: String? = null): UniformProperty<Vector3fc> =
+        uniform(name, { loc, value ->
+            val floatArray = MemoryUtil.memAllocFloat(3)
+            value.get(floatArray)
+            glUniform3fv(loc, floatArray)
+            MemoryUtil.memFree(floatArray)
+        }, { programId, location ->
+            val buffer = FloatArray(3)
+            glGetUniformfv(programId, location, buffer)
+            Vector3f().set(buffer)
+        })
+
+    protected fun vec4(name: String? = null): UniformProperty<Vector4fc> =
+        uniform(name, { loc, value ->
+            val floatArray = MemoryUtil.memAllocFloat(4)
+            value.get(floatArray)
+            glUniform4fv(loc, floatArray)
+            MemoryUtil.memFree(floatArray)
+        }, { programId, location ->
+            val buffer = FloatArray(4)
+            glGetUniformfv(programId, location, buffer)
+            Vector4f().set(buffer)
+        })
+
+    protected fun mat3(name: String? = null): UniformProperty<Matrix3fc> =
+        uniform(name, { loc, value ->
+            val floatArray = FloatArray(3 * 3)
+            value.get(floatArray)
+            glUniformMatrix3fv(loc, false, floatArray)
+        }, { programId, location ->
+            val buffer = FloatArray(3 * 3)
+            glGetUniformfv(programId, location, buffer)
+            Matrix3f().set(buffer)
+        })
+
+    protected fun bool(name: String? = null): UniformProperty<Boolean> =
+        uniform(name, { loc, value ->
+            glUniform1i(loc, if (value) 1 else 0)
+        }, { programId, location ->
+            glGetUniformi(programId, location) == 1
+        })
+
+    protected fun mat4(name: String? = null): UniformProperty<Matrix4fc> =
+        uniform(name, { loc, value ->
+            val floatArray = FloatArray(4 * 4)
+            value.get(floatArray)
+            glUniformMatrix4fv(loc, false, floatArray)
+        }, { programId, location ->
+            val buffer = FloatArray(4 * 4)
+            glGetUniformfv(programId, location, buffer)
+            Matrix4f().set(buffer)
+        })
+
+    fun enable() {
+        glUseProgram(programId)
+
+        for ((_, queued) in queuedUniformValues) {
+            queued()
+        }
+
+        for ((index, texture) in textures) {
+            glActiveTexture(GL_TEXTURE0 + index)
+            glBindTexture(GL_TEXTURE_2D, texture)
+        }
+
+        queuedUniformValues.clear()
+    }
+
+    fun delete() {
+        glDeleteProgram(programId)
+    }
+
+    fun disable() {
+        glUseProgram(0)
+    }
+
+    fun uses(name: String): Boolean {
+        return getUniformLocation(name) != -1
+    }
+
+
+
+    fun camera(renderer: ICamera<*>) {
+        this.projection = renderer.projection.toFloat()
+        this.view = renderer.view.toFloat()
+    }
+
+    constructor(vertexShader: Shader, fragmentShader: Shader) : this() {
+        glAttachShader(programId, vertexShader.shaderId)
+        glAttachShader(programId, fragmentShader.shaderId)
+
+        glLinkProgram(programId)
+        val success = stack.mallocInt(1)
+        glGetProgramiv(programId, GL_LINK_STATUS, success)
+        if (success.get(0) == 0) {
+            throw ShaderProgramLinkingException(glGetProgramInfoLog(programId))
+        }
+    }
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/dom/GLRenderNode.kt

@@ -0,0 +1,10 @@
+package me.eater.threedom.gl.dom
+
+import me.eater.threedom.dom.render.IRenderNode
+import me.eater.threedom.gl.GL
+
+interface GLRenderNode<T : IRenderNode<T, GL, ICamera<*>>> :
+    IRenderNode<T, GL, ICamera<*>> {
+    override val target: GL
+        get() = GL
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/dom/ICamera.kt

@@ -0,0 +1,12 @@
+package me.eater.threedom.gl.dom
+
+import me.eater.threedom.dom.INode
+import org.joml.Matrix4dc
+
+interface ICamera<T : INode<T>> : INode<T> {
+    var width: Double
+    var height: Double
+
+    val projection: Matrix4dc
+    val view: Matrix4dc
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/dom/PerspectiveCamera.kt

@@ -0,0 +1,53 @@
+package me.eater.threedom.gl.dom
+
+import me.eater.threedom.dom.IDocument
+import me.eater.threedom.dom.Node
+import org.joml.Matrix4d
+import org.joml.Matrix4dc
+
+class PerspectiveCamera(document: IDocument?) : Node<PerspectiveCamera>(document), ICamera<PerspectiveCamera> {
+    override fun cloneSelf(): PerspectiveCamera =
+        PerspectiveCamera(document)
+
+    var fieldOfView: Double = 45.0
+        set(value) {
+            field = value
+            updateProjection()
+        }
+
+    var far: Double = 100.0
+        set(value) {
+            field = value
+            updateProjection()
+        }
+
+    var near: Double = 0.1
+        set(value) {
+            field = value
+            updateProjection()
+        }
+
+    override var width: Double = 800.0
+        set(value) {
+            field = value
+            updateProjection()
+        }
+
+    override var height: Double = 600.0
+        set(value) {
+            field = value
+            updateProjection()
+        }
+
+    private fun updateProjection() {
+        projection = makeProjection()
+    }
+
+    private fun makeProjection(): Matrix4dc = Matrix4d().perspective(fieldOfView, width / height, near, far)
+
+    override var projection: Matrix4dc = makeProjection()
+        private set
+
+    override val view: Matrix4dc
+        get() = absolute
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/dom/TriMesh.kt

@@ -0,0 +1,49 @@
+package me.eater.threedom.gl.dom
+
+import me.eater.threedom.dom.IDocument
+import me.eater.threedom.dom.Node
+import me.eater.threedom.gl.ShaderProgram
+import me.eater.threedom.gl.vertex.VertexArrayObject
+import me.eater.threedom.utils.joml.toFloat
+import org.joml.Matrix3d
+import org.joml.Matrix4d
+import org.lwjgl.opengl.GL30.*
+
+open class TriMesh(document: IDocument?) : Node<TriMesh>(document), GLRenderNode<TriMesh> {
+    var mesh: VertexArrayObject? = null
+    var program: ShaderProgram? = null
+        private set
+    var programConfig: (ShaderProgram.(TriMesh) -> Unit)? = null
+        private set
+
+    fun <T : ShaderProgram> use(program: T, block: T.(TriMesh) -> Unit) {
+        this.program = program
+        @kotlin.Suppress("UNCHECKED_CAST")
+        this.programConfig = block as ShaderProgram.(TriMesh) -> Unit
+    }
+
+    fun <T : ShaderProgram> use(program: T) {
+        this.program = program
+        this.programConfig = null
+    }
+
+    override fun cloneSelf(): TriMesh {
+        return TriMesh(document).also {
+            it.mesh = mesh
+            it.program = program
+            it.programConfig = programConfig
+        }
+    }
+
+    override fun render(renderer: ICamera<*>) {
+        val mesh = mesh ?: return
+        val program = program ?: return
+        program.enable()
+        programConfig?.let { program.it(this) }
+        program.camera(renderer)
+        program.model = absolute.toFloat()
+        program.normalModel = model.invert(Matrix4d()).transpose().get3x3(Matrix3d()).toFloat()
+        glBindVertexArray(mesh.id)
+        glDrawArrays(GL_TRIANGLES, 0, mesh.size)
+    }
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/exception/ShaderCompilationException.kt

@@ -0,0 +1,3 @@
+package me.eater.threedom.gl.exception
+
+data class ShaderCompilationException(val infoLog: String) : RuntimeException("Shader failed compiling: $infoLog")

threedom-gl/src/main/kotlin/me/eater/threedom/gl/exception/ShaderProgramLinkingException.kt

@@ -0,0 +1,4 @@
+package me.eater.threedom.gl.exception
+
+data class ShaderProgramLinkingException(val infoLog: String) :
+    RuntimeException("Failed linking ShaderProgram: $infoLog")

threedom-gl/src/main/kotlin/me/eater/threedom/gl/geometry/Plane.kt

@@ -0,0 +1,8 @@
+package me.eater.threedom.gl.geometry
+
+import me.eater.threedom.dom.IDocument
+import me.eater.threedom.dom.INode
+import me.eater.threedom.gl.dom.TriMesh
+
+class Plane(document: IDocument?) : TriMesh(document) {
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/texture/Texture.kt

@@ -0,0 +1,55 @@
+package me.eater.threedom.gl.texture
+
+import me.eater.threedom.gl.GL.stack
+import org.lwjgl.opengl.GL30.*
+import org.lwjgl.stb.STBImage.stbi_load_from_memory
+import org.lwjgl.stb.STBImage.stbi_set_flip_vertically_on_load
+import org.lwjgl.system.MemoryUtil
+import java.lang.ref.WeakReference
+import java.nio.ByteBuffer
+
+class Texture {
+    var id: Int = run {
+        val pTexture = stack.mallocInt(1)
+        glGenTextures(pTexture)
+        pTexture.get(0).also {
+            textures[it] = WeakReference(this)
+        }
+    }
+
+    fun load(image: ByteArray, flipped: Boolean = true, mipmapLevel: Int = 0) {
+        val mem = MemoryUtil.memAlloc(image.size)
+        mem.put(image)
+        mem.rewind()
+        load(mem, flipped, mipmapLevel)
+        MemoryUtil.memFree(mem)
+    }
+
+    fun load(image: ByteBuffer, flipped: Boolean = true, mipmapLevel: Int = 0) {
+        stbi_set_flip_vertically_on_load(flipped)
+        val pWidth = stack.mallocInt(1)
+        val pHeight = stack.mallocInt(1)
+        val pChannels = stack.mallocInt(1)
+        val imagePixelData = stbi_load_from_memory(image, pWidth, pHeight, pChannels, 4)
+        glBindTexture(GL_TEXTURE_2D, id)
+        glTexImage2D(
+            GL_TEXTURE_2D,
+            mipmapLevel,
+            GL_RGBA8,
+            pWidth.get(0),
+            pHeight.get(0),
+            0,
+            GL_RGBA,
+            GL_UNSIGNED_BYTE,
+            imagePixelData
+        )
+        glGenerateMipmap(GL_TEXTURE_2D)
+        glBindTexture(GL_TEXTURE_2D, 0)
+    }
+
+    companion object {
+        private val textures = mutableMapOf<Int, WeakReference<Texture>>()
+
+        fun getTexture(id: Int): Texture? = textures[id]?.get()
+    }
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/vertex/VertexArrayObject.kt

@@ -0,0 +1,78 @@
+package me.eater.threedom.gl.vertex
+
+import me.eater.threedom.gl.GL.stack
+import org.lwjgl.opengl.GL30.*
+import kotlin.math.min
+import kotlin.reflect.KProperty1
+
+class VertexArrayObject() {
+    var size: Int = 0
+
+    val id = run {
+        val pId = stack.mallocInt(1)
+        glGenVertexArrays(pId)
+        pId.get(0)
+    }
+
+    constructor(block: VertexArrayObject.() -> Unit) : this() {
+        block(this)
+    }
+
+    var pointerIndex: Int = 0
+
+    operator fun <T : VertexData> VertexBuffer<T>.invoke(prop: KProperty1<T, *>) =
+        bind(this, prop)
+
+    fun <T : VertexData> bind(vertexBuffer: VertexBuffer<T>, prop: KProperty1<T, *>) {
+        if (vertexBuffer.items.isEmpty()) {
+            return
+        }
+
+        size = if (pointerIndex == 0) {
+            vertexBuffer.items.size
+        } else {
+            min(size, vertexBuffer.items.size)
+        }
+
+        val first = vertexBuffer.items.first()
+        val item = first.getDataPoint(prop) ?: return
+        var size = item.slots
+        var length = item.length
+        var repeat = 1
+
+        var i = 4
+        while (size > 4) {
+            if ((size % i) == 0) {
+                repeat = size / i
+                size = i
+                length /= i
+                break
+            }
+
+            i--
+        }
+
+        val stride = if (vertexBuffer.interleaved) {
+            vertexBuffer.stride
+        } else {
+            item.length
+        }
+
+        var offset = first.getOffset(prop)!!
+
+        if (!vertexBuffer.interleaved) {
+            offset *= vertexBuffer.items.size
+        }
+
+        glBindVertexArray(id)
+        glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer.id)
+        for (x in 0 until repeat) {
+            val pointer = pointerIndex++
+            glVertexAttribPointer(pointer, size, item.type, false, stride, offset + (x * length).toLong())
+            glEnableVertexAttribArray(pointer)
+        }
+
+        glBindBuffer(GL_ARRAY_BUFFER, 0)
+        glBindVertexArray(0)
+    }
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/vertex/VertexBuffer.kt

@@ -0,0 +1,45 @@
+package me.eater.threedom.gl.vertex
+
+import me.eater.threedom.gl.GL.stack
+import org.lwjgl.opengl.GL30.*
+import org.lwjgl.system.MemoryUtil
+import java.nio.ByteBuffer
+
+open class VertexBuffer<T : VertexData>(
+    items: List<T> = listOf(),
+    val interleaved: Boolean = false,
+    val usage: Int = GL_STATIC_DRAW
+) {
+    val id: Int = run {
+        val pId = stack.mallocInt(1)
+        glGenBuffers(pId)
+        pId.get(0)
+    }
+
+    @Suppress("CanBePrimaryConstructorProperty")
+    open val items: List<T> = items
+    var stride: Int
+        private set
+
+    init {
+        val size = items.size * (items.firstOrNull()?.length ?: 0).also { stride = it }
+        val byteBuffer = MemoryUtil.memAlloc(size)
+
+        var offset = 0
+        for (i in items.indices) {
+            val item = items[i]
+
+            if (interleaved) {
+                item.write(offset, byteBuffer)
+                offset += item.length
+            } else {
+                item.writeNonInterleaved(i, items.size, byteBuffer)
+            }
+        }
+
+        glBindBuffer(GL_ARRAY_BUFFER, id)
+        glBufferData(GL_ARRAY_BUFFER, byteBuffer, usage)
+        glBindBuffer(GL_ARRAY_BUFFER, 0)
+        MemoryUtil.memFree(byteBuffer)
+    }
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/vertex/VertexBufferMutable.kt

@@ -0,0 +1,3 @@
+package me.eater.threedom.gl.vertex
+
+class VertexBufferMutable<T: VertexData>(override val items: MutableList<T> = mutableListOf()) : VertexBuffer<T>()

threedom-gl/src/main/kotlin/me/eater/threedom/gl/vertex/VertexData.kt

@@ -0,0 +1,56 @@
+package me.eater.threedom.gl.vertex
+
+import me.eater.threedom.gl.vertex.VertexDataPoint.*
+import org.joml.*
+import java.nio.ByteBuffer
+import kotlin.reflect.KProperty
+import kotlin.reflect.KProperty1
+
+abstract class VertexData() {
+    private val items = linkedMapOf<String, Pair<Int, VertexDataPoint<*>>>()
+    private var offset = 0
+
+    val length
+        get() = items.map { (_, v) -> v.component2().length }.sum()
+
+    class VertexDataRegister<T>(private val default: T, val provider: (default: T) -> VertexDataPoint<T>) {
+        operator fun provideDelegate(thisRef: VertexData, prop: KProperty<*>): VertexDataPoint<T> {
+            val delegate = provider(default)
+            thisRef.items[prop.name] = thisRef.offset to delegate
+            thisRef.offset += delegate.length
+            return delegate
+        }
+    }
+
+    fun int(value: Int = 0): VertexDataRegister<Int> = VertexDataRegister(value, ::SingleInt)
+    fun double(value: Double = 0.0): VertexDataRegister<Double> = VertexDataRegister(value, ::SingleDouble)
+    fun float(value: Float = 0f): VertexDataRegister<Float> = VertexDataRegister(value, ::SingleFloat)
+    fun bool(value: Boolean = false): VertexDataRegister<Boolean> = VertexDataRegister(value, ::SingleBoolean)
+    fun vec2(value: Vector2fc = Vector2f()): VertexDataRegister<Vector2fc> = VertexDataRegister(value, ::Vec2)
+    fun vec3(value: Vector3fc = Vector3f()): VertexDataRegister<Vector3fc> = VertexDataRegister(value, ::Vec3)
+    fun vec4(value: Vector4fc = Vector4f()): VertexDataRegister<Vector4fc> = VertexDataRegister(value, ::Vec4)
+    fun mat3(value: Matrix3fc = Matrix3f()): VertexDataRegister<Matrix3fc> = VertexDataRegister(value, ::Mat3)
+    fun mat4(value: Matrix4fc = Matrix4f()): VertexDataRegister<Matrix4fc> = VertexDataRegister(value, ::Mat4)
+
+    fun getDataPoint(prop: KProperty1<out VertexData, *>): VertexDataPoint<*>? = items[prop.name]?.component2()
+
+    fun getOffset(prop: KProperty1<out VertexData, *>): Int? = items[prop.name]?.component1()
+
+    fun writeNonInterleaved(position: Int, size: Int, byteBuffer: ByteBuffer) {
+        var offset = 0;
+        for ((_, pair) in items) {
+            val (_, item) = pair
+            item.write(offset + (position * item.length), byteBuffer)
+            offset += item.length * size
+        }
+    }
+
+    fun write(position: Int, byteBuffer: ByteBuffer) {
+        var pos = position
+        for ((_, pair) in items) {
+            val (_, item) = pair
+            item.write(pos, byteBuffer)
+            pos += item.length
+        }
+    }
+}

threedom-gl/src/main/kotlin/me/eater/threedom/gl/vertex/VertexDataPoint.kt

@@ -0,0 +1,73 @@
+package me.eater.threedom.gl.vertex
+
+import org.joml.*
+import org.lwjgl.opengl.GL30.*
+import java.nio.ByteBuffer
+import kotlin.reflect.KProperty
+
+abstract class VertexDataPoint<T>(val type: Int, var value: T, val length: Int, val slots: Int = 1) {
+    abstract fun write(position: Int, buffer: ByteBuffer)
+
+    operator fun getValue(thisRef: Any?, property: KProperty<*>): T {
+        return value
+    }
+
+    operator fun setValue(thisRef: Any?, property: KProperty<*>, value: T) {
+        this.value = value
+    }
+
+    class SingleInt(value: Int) : VertexDataPoint<Int>(GL_INT, value, 4) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            buffer.putInt(position, value)
+        }
+
+    }
+
+    class SingleFloat(value: Float) : VertexDataPoint<Float>(GL_FLOAT, value, 4) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            buffer.putFloat(position, value)
+        }
+    }
+
+    class SingleDouble(value: Double) : VertexDataPoint<Double>(GL_DOUBLE, value, 8) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            buffer.putDouble(position, value)
+        }
+    }
+
+    class SingleBoolean(value: Boolean) : VertexDataPoint<Boolean>(GL_BOOL, value, 1) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            buffer.put(position, if (value) 1 else 2)
+        }
+    }
+
+    class Vec2(value: Vector2fc) : VertexDataPoint<Vector2fc>(GL_FLOAT, value, 8, 2) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            value.get(position, buffer)
+        }
+    }
+
+    class Vec3(value: Vector3fc) : VertexDataPoint<Vector3fc>(GL_FLOAT, value, 12, 3) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            value.get(position, buffer)
+        }
+    }
+
+    class Vec4(value: Vector4fc) : VertexDataPoint<Vector4fc>(GL_FLOAT, value, 16, 4) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            value.get(position, buffer)
+        }
+    }
+
+    class Mat3(value: Matrix3fc) : VertexDataPoint<Matrix3fc>(GL_FLOAT, value, 3 * 3 * 4, 9) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            value.get(position, buffer)
+        }
+    }
+
+    class Mat4(value: Matrix4fc) : VertexDataPoint<Matrix4fc>(GL_FLOAT, value, 4 * 4 * 4, 16) {
+        override fun write(position: Int, buffer: ByteBuffer) {
+            value.get(position, buffer)
+        }
+    }
+}

threedom-kapt/build.gradle

@@ -1,5 +1,6 @@
 plugins {
     id 'org.jetbrains.kotlin.jvm' version '1.3.72'
+    id 'java'
 }
 
 group 'me.eater.threedom'
@@ -11,8 +12,13 @@ dependencies {
 }
 
 compileKotlin {
-    kotlinOptions.jvmTarget = "1.8"
+    kotlinOptions.jvmTarget = "12"
 }
 compileTestKotlin {
-    kotlinOptions.jvmTarget = "1.8"
+    kotlinOptions.jvmTarget = "12"
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_12
+    targetCompatibility = JavaVersion.VERSION_12
 }

threedom/build.gradle

@@ -1,6 +1,7 @@
 plugins {
     id 'org.jetbrains.kotlin.jvm' version '1.3.72'
     id "org.jetbrains.kotlin.kapt" version "1.3.72"
+    id 'java'
 }
 
 group 'me.eater.threedom'
@@ -30,8 +31,13 @@ dependencies {
 }
 
 compileKotlin {
-    kotlinOptions.jvmTarget = "1.8"
+    kotlinOptions.jvmTarget = "12"
 }
 compileTestKotlin {
-    kotlinOptions.jvmTarget = "1.8"
+    kotlinOptions.jvmTarget = "12"
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_12
+    targetCompatibility = JavaVersion.VERSION_12
 }

threedom/src/main/kotlin/me/eater/threedom/dom/Document.kt

@@ -1,9 +1,8 @@
 package me.eater.threedom.dom
 
-import me.eater.threedom.dom.event.DOMTreeUpdate
+import me.eater.threedom.dom.event.*
-import me.eater.threedom.dom.event.NodeClassListUpdate
+import me.eater.threedom.dom.render.IRenderNode
-import me.eater.threedom.dom.event.NodeIDUpdate
+import me.eater.threedom.dom.render.IRenderTarget
-import me.eater.threedom.dom.event.NodeModelUpdate
 import me.eater.threedom.event.Event
 import me.eater.threedom.generated.EventNames
 import me.eater.threedom.utils.KDTree
@@ -12,6 +11,7 @@ import kotlin.reflect.KClass
 
 class Document : IDocument {
     val root: PlainNode = PlainNode(this)
+
     private val eventTree = EventTree {
         on<DOMTreeUpdate.Remove> { (event) ->
             removeNodeFromSearch(event.child)
@@ -22,7 +22,9 @@ class Document : IDocument {
         }
 
         on<DOMTreeUpdate.Move> { (event) ->
-            updateKDTreeForNode(event.child)
+            if (event.child.shouldIndexLocation) {
+                updateKDTreeForNode(event.child)
+            }
         }
 
         on<NodeIDUpdate> { (event) ->
@@ -36,19 +38,19 @@ class Document : IDocument {
         }
 
         on<NodeClassListUpdate.Added> { (event) ->
-            for (className in event.classNames) {
+            for (tagName in event.tagNames) {
-                byClass.getOrPut(className, ::mutableSetOf).add(event.node.nodeId)
+                byTag.getOrPut(tagName, ::mutableSetOf).add(event.node.nodeId)
             }
         }
 
         on<NodeClassListUpdate.Removed> { (event) ->
-            for (className in event.classNames) {
+            for (tagName in event.tagNames) {
-                val set = byClass[className] ?: continue
+                val set = byTag[tagName] ?: continue
 
                 set.remove(event.node.nodeId)
 
                 if (set.size == 0) {
-                    byClass.remove(className)
+                    byTag.remove(tagName)
                 }
             }
         }
@@ -56,20 +58,34 @@ class Document : IDocument {
         on<NodeModelUpdate> { (event) ->
             updateKDTreeForNode(event.node)
         }
+
+        on<NodeLocationIndexStateChange> { (event) ->
+            if (event.shouldIndex) {
+                kdTree.add(event.node)
+            } else {
+                kdTree.remove(event.node)
+            }
+        }
     }
     private val kdTree = KDTree(this)
 
     private val allNodes: MutableMap<Long, INode<*>> = mutableMapOf()
     private val byId: MutableMap<String, Long> = mutableMapOf()
-    private val byClass: MutableMap<String, MutableSet<Long>> = mutableMapOf()
+    private val byTag: MutableMap<String, MutableSet<Long>> = mutableMapOf()
+    private val byType: MutableMap<String, MutableSet<Long>> = mutableMapOf()
+    private val byRenderTarget: MutableMap<String, MutableSet<Long>> = mutableMapOf()
 
     private fun updateKDTreeForNode(node: INode<*>) {
         node.updateAbsolute()
-        kdTree.update(node)
+        if (node.shouldIndexLocation) {
+            kdTree.update(node)
+        }
 
         for (child in node.recursiveIterator()) {
             child.updateAbsolute()
-            kdTree.update(child)
+            if (node.shouldIndexLocation) {
+                kdTree.update(child)
+            }
         }
     }
 
@@ -107,8 +123,21 @@ class Document : IDocument {
 
     override fun getNodeById(id: String): INode<*>? = byId[id]?.let(allNodes::get)
 
-    override fun getNodesByClassName(className: String): Sequence<INode<*>> =
+    override fun getNodesByTag(tagName: String): Sequence<INode<*>> =
-        byClass[className]?.asSequence()?.mapNotNull(allNodes::get) ?: emptySequence()
+        byTag[tagName]?.asSequence()?.mapNotNull(allNodes::get) ?: emptySequence()
+
+    @Suppress("UNCHECKED_CAST")
+    override fun <T : INode<T>> getNodesByClass(className: String): Sequence<T> =
+        byType[className]?.asSequence()?.mapNotNull { nodeId ->
+            allNodes[nodeId]?.let {
+                (it.className == className) as? T
+            }
+        } ?: emptySequence()
+
+    @Suppress("UNCHECKED_CAST")
+    override fun <T : IRenderTarget<C>, C> getNodesByRenderTarget(targetType: String): Sequence<IRenderNode<*, T, C>> =
+        byRenderTarget[targetType]?.asSequence()?.mapNotNull(allNodes::get) as? Sequence<IRenderNode<*, T, C>>
+            ?: emptySequence()
 
 
     private fun addNodeToSearch(node: INode<*>) {
@@ -116,11 +145,19 @@ class Document : IDocument {
 
         node.id?.let { byId.putIfAbsent(it, node.nodeId) }
 
-        for (className in node.classList) {
+        for (className in node.tagList) {
-            byClass.getOrPut(className, ::mutableSetOf).add(node.nodeId)
+            byTag.getOrPut(className, ::mutableSetOf).add(node.nodeId)
         }
 
-        kdTree.add(node)
+        byType.getOrPut(node.javaClass.name, ::mutableSetOf).add(node.nodeId)
+
+        if (node is IRenderNode<*, *, *>) {
+            byRenderTarget.getOrPut(node.target.type, ::mutableSetOf).add(node.nodeId)
+        }
+
+        if (node.shouldIndexLocation) {
+            kdTree.add(node)
+        }
     }
 
     private fun removeNodeFromSearch(node: INode<*>) {
@@ -128,15 +165,36 @@ class Document : IDocument {
 
         node.id?.let { byId.remove(it, node.nodeId) }
 
-        for (className in node.classList) {
+        for (className in node.tagList) {
-            val set = byClass.get(className) ?: continue
+            val set = byTag.get(className) ?: continue
             set.remove(node.nodeId)
             if (set.size == 0) {
-                byClass.remove(className)
+                byTag.remove(className)
             }
         }
 
-        kdTree.remove(node)
+
+        byType[node.javaClass.name]?.let {
+            it.remove(node.nodeId)
+
+            if (it.size == 0) {
+                byType.remove(node.javaClass.name)
+            }
+        }
+
+        if (node is IRenderNode<*, *, *>) {
+            byRenderTarget[node.target.type]?.let {
+                it.remove(node.nodeId)
+
+                if (it.size == 0) {
+                    byRenderTarget.remove(node.target.type)
+                }
+            }
+        }
+
+        if (node.shouldIndexLocation) {
+            kdTree.remove(node)
+        }
     }
 
     inline fun <reified T> on(topLevel: Boolean = false, noinline block: (Event<T>) -> Unit) = if (topLevel)

threedom/src/main/kotlin/me/eater/threedom/dom/IDocument.kt

@@ -1,5 +1,7 @@
 package me.eater.threedom.dom
 
+import me.eater.threedom.dom.render.IRenderNode
+import me.eater.threedom.dom.render.IRenderTarget
 import me.eater.threedom.event.Event
 import me.eater.threedom.event.EventDispatcher
 import me.eater.threedom.utils.joml.Vector3d
@@ -14,6 +16,12 @@ interface IDocument : EventDispatcher, INodeContainer {
     fun findAt(x: Number, y: Number, z: Number) = findAt(Vector3d(x, y, z))
     fun findAt(vec: Vector3dc): Collection<INode<*>>
     fun rebalance()
+
+    fun <C, T : IRenderTarget<C>, N : IRenderNode<*, T, C>> render(target: T, renderer: C) {
+        for (node in getNodesByRenderTarget<T, C>(target.type)) {
+            node.render(renderer)
+        }
+    }
 }
 
 inline fun <reified T : INode<T>> IDocument.createNode() = createNode(T::class)

threedom/src/main/kotlin/me/eater/threedom/dom/INode.kt

@@ -6,6 +6,9 @@ import org.joml.Matrix4dc
 import java.util.concurrent.atomic.AtomicLong
 
 interface INode<T : INode<T>> : Comparable<INode<*>>, INodeContainer {
+    val className: String
+        get() = this::class.java.name
+
     /**
      * The ID of this node
      */
@@ -14,7 +17,7 @@ interface INode<T : INode<T>> : Comparable<INode<*>>, INodeContainer {
     /**
      * Set with all class names assigned to this node
      */
-    val classList: MutableSet<String>
+    val tagList: MutableSet<String>
 
     /**
      * Internal ID of this node, should be unique inside document
@@ -31,6 +34,12 @@ interface INode<T : INode<T>> : Comparable<INode<*>>, INodeContainer {
      */
     val document: IDocument?
 
+    /**
+     * If the location should be indexed
+     */
+    val shouldIndexLocation: Boolean
+        get() = false
+
     /**
      * Absolute matrix relative to document
      */
@@ -47,7 +56,7 @@ interface INode<T : INode<T>> : Comparable<INode<*>>, INodeContainer {
      *
      * @param deep also clone all child nodes
      */
-    fun clone(deep: Boolean): T
+    fun clone(deep: Boolean = false): T
 
     /**
      * Update the parent of this node, for consistency purposes.

threedom/src/main/kotlin/me/eater/threedom/dom/INodeQueryCapable.kt

@@ -1,5 +1,7 @@
 package me.eater.threedom.dom
 
+import me.eater.threedom.dom.render.IRenderNode
+import me.eater.threedom.dom.render.IRenderTarget
 import org.joml.Vector3dc
 
 interface INodeQueryCapable {
@@ -9,9 +11,19 @@ interface INodeQueryCapable {
     fun getNodeById(id: String): INode<*>?
 
     /**
-     * Get all nodes inside this node with the class [className]
+     * Get all nodes inside this node with the class [tagName]
      */
-    fun getNodesByClassName(className: String): Sequence<INode<*>>
+    fun getNodesByTag(tagName: String): Sequence<INode<*>>
+
+    /**
+     * Get all nodes inside this node with the Java class [className]
+     */
+    fun <T : INode<T>> getNodesByClass(className: String): Sequence<T>
+
+    /**
+     * Get all nodes inside this node with the render target with type of [targetType]s
+     */
+    fun <T : IRenderTarget<C>, C> getNodesByRenderTarget(targetType: String): Sequence<IRenderNode<*, T, C>>
 
     /**
      * find all nodes inside this node in region between [pointA] and [pointB]

threedom/src/main/kotlin/me/eater/threedom/dom/Node.kt

@@ -1,9 +1,8 @@
 package me.eater.threedom.dom
 
-import me.eater.threedom.dom.event.DOMTreeUpdate
+import me.eater.threedom.dom.event.*
-import me.eater.threedom.dom.event.NodeClassListUpdate
+import me.eater.threedom.dom.render.IRenderNode
-import me.eater.threedom.dom.event.NodeIDUpdate
+import me.eater.threedom.dom.render.IRenderTarget
-import me.eater.threedom.dom.event.NodeModelUpdate
 import me.eater.threedom.event.Event
 import me.eater.threedom.event.EventListener
 import me.eater.threedom.event.trigger
@@ -15,6 +14,8 @@ import org.joml.Matrix4dc
 import org.joml.Vector3dc
 
 abstract class Node<T : INode<T>>(document: IDocument?) : INode<T>, EventListener {
+    override val className: String = this::class.java.name
+
     override var document: IDocument? = document
         protected set
     override val nodeId = INode.getNextNodeId()
@@ -23,12 +24,18 @@ abstract class Node<T : INode<T>>(document: IDocument?) : INode<T>, EventListene
     override var parentNode: INode<*>? = null
         protected set
 
-    private var _id: String? = null
+    override var shouldIndexLocation: Boolean = false
-    override var id: String?
-        get() = _id
         set(value) {
-            val old = _id
+            if (field == value) return
-            _id = value
+
+            field = value
+            trigger(NodeLocationIndexStateChange(field, this))
+        }
+
+    override var id: String? = null
+        set(value) {
+            val old = field
+            field = value
 
             trigger(NodeIDUpdate(this, old, value))
         }
@@ -36,7 +43,7 @@ abstract class Node<T : INode<T>>(document: IDocument?) : INode<T>, EventListene
     override var absolute: Matrix4dc = Matrix4d()
         protected set
 
-    override val classList: MutableSet<String> = ObservableSet {
+    override val tagList: MutableSet<String> = ObservableSet {
         when (it.action) {
             ObservableSet.Action.Removed -> trigger(NodeClassListUpdate.Removed(it.elements, this))
             ObservableSet.Action.Added -> trigger(NodeClassListUpdate.Added(it.elements, this))
@@ -49,17 +56,15 @@ abstract class Node<T : INode<T>>(document: IDocument?) : INode<T>, EventListene
         }
     }
 
-    private var _model: Matrix4d = Matrix4d()
+    override var model: Matrix4dc = Matrix4d()
-    override var model: Matrix4dc
-        get() = _model
         set(value) {
-            val old = Matrix4d(_model)
+            val old = Matrix4d(field)
-            _model = value.mutable()
+            field = value.mutable()
             trigger(NodeModelUpdate(this, old))
         }
 
     fun model(block: Matrix4d.() -> Matrix4dc) {
-        this.model = block(this._model)
+        this.model = block(this.model.mutable())
     }
 
     var children: List<INode<*>> = nodes.toList()
@@ -190,10 +195,16 @@ abstract class Node<T : INode<T>>(document: IDocument?) : INode<T>, EventListene
     }
 
     override fun getNodeById(id: String): INode<*>? = document?.getNodeById(id)?.takeIf { it.hasParent(this) }
-    override fun getNodesByClassName(className: String): Sequence<INode<*>> = if (nodes.isEmpty())
+    override fun getNodesByTag(tagName: String): Sequence<INode<*>> = if (nodes.isEmpty())
         emptySequence()
     else
-        document?.getNodesByClassName(className)?.filter { it.hasParent(this) } ?: emptySequence()
+        document?.getNodesByTag(tagName)?.filter { it.hasParent(this) } ?: emptySequence()
+
+    override fun <T : INode<T>> getNodesByClass(className: String): Sequence<T> =
+        document?.getNodesByClass<T>(className)?.filter { it.hasParent(this) } ?: emptySequence()
+
+    override fun <T : IRenderTarget<C>, C> getNodesByRenderTarget(targetType: String): Sequence<IRenderNode<*, T, C>> =
+        document?.getNodesByRenderTarget<T, C>(targetType)?.filter { it.hasParent(this) } ?: emptySequence()
 
     override fun updateAbsolute() {
         this.absolute = (this.parentNode?.absolute ?: Matrix4d()) * model

threedom/src/main/kotlin/me/eater/threedom/dom/PlainNode.kt

@@ -1,7 +1,5 @@
 package me.eater.threedom.dom
 
 class PlainNode(document: IDocument?) : Node<PlainNode>(document) {
-    override fun cloneSelf(): PlainNode {
+    override fun cloneSelf(): PlainNode = PlainNode(document)
-        return PlainNode(document)
-    }
 }

threedom/src/main/kotlin/me/eater/threedom/dom/event/NodeClassListUpdate.kt

@@ -7,8 +7,8 @@ sealed class NodeClassListUpdate {
     abstract val node: INode<*>
 
     @EventName("NodeClassesRemoved")
-    class Removed(val classNames: Set<String>, override val node: INode<*>) : NodeClassListUpdate()
+    class Removed(val tagNames: Set<String>, override val node: INode<*>) : NodeClassListUpdate()
 
     @EventName("NodeClassesAdded")
-    class Added(val classNames: Set<String>, override val node: INode<*>) : NodeClassListUpdate()
+    class Added(val tagNames: Set<String>, override val node: INode<*>) : NodeClassListUpdate()
 }

threedom/src/main/kotlin/me/eater/threedom/dom/event/NodeLocationIndexStateChange.kt

@@ -0,0 +1,7 @@
+package me.eater.threedom.dom.event
+
+import me.eater.threedom.dom.INode
+import me.eater.threedom.kapt.EventName
+
+@EventName("NodeLocationIndexStateChange")
+class NodeLocationIndexStateChange(val shouldIndex: Boolean, val node: INode<*>)

threedom/src/main/kotlin/me/eater/threedom/dom/render/IRenderNode.kt

@@ -0,0 +1,10 @@
+package me.eater.threedom.dom.render
+
+import me.eater.threedom.dom.INode
+
+interface IRenderNode<N : IRenderNode<N, T, C>, T : IRenderTarget<C>, C> :
+    INode<N> {
+    val target: T
+
+    fun render(renderer: C)
+}

threedom/src/main/kotlin/me/eater/threedom/dom/render/IRenderTarget.kt

@@ -0,0 +1,5 @@
+package me.eater.threedom.dom.render
+
+interface IRenderTarget<C> {
+    val type: String
+}

threedom/src/main/kotlin/me/eater/threedom/utils/joml/JOML.kt

@@ -1,9 +1,12 @@
 package me.eater.threedom.utils.joml
 
-import org.joml.Matrix4d
+import org.joml.*
-import org.joml.Matrix4dc
+import org.joml.Vector2d
+import org.joml.Vector2f
 import org.joml.Vector3d
-import org.joml.Vector3dc
+import org.joml.Vector3f
+import org.joml.Vector4d
+import org.joml.Vector4f
 
 fun <T : Number> Matrix4dc.setTranslation(x: T, y: T, z: T): Matrix4d =
     Matrix4d(this).setTranslation(x.toDouble(), y.toDouble(), z.toDouble())
@@ -16,9 +19,61 @@ fun Matrix4dc.mutable(): Matrix4d = if (this is Matrix4d) this else Matrix4d(thi
 operator fun Matrix4dc.times(rhs: Matrix4dc) = mul(rhs, Matrix4d())
 operator fun Matrix4d.times(rhs: Matrix4dc) = mul(rhs)
 
+@Suppress("FunctionName")
+fun Vector2f(x: Number, y: Number) = Vector2f(x.toFloat(), y.toFloat())
+
+@Suppress("FunctionName")
+fun Vector2d(x: Number, y: Number) = Vector2d(x.toDouble(), y.toDouble())
+
+fun vec2(x: Number, y: Number) = Vector2f(x, y)
+fun vec2d(x: Number, y: Number) = Vector2d(x, y)
+
+@Suppress("FunctionName")
+fun Vector3f(x: Number, y: Number, z: Number) = Vector3f(x.toFloat(), y.toFloat(), z.toFloat())
+
 @Suppress("FunctionName")
 fun Vector3d(x: Number, y: Number, z: Number) = Vector3d(x.toDouble(), y.toDouble(), z.toDouble())
 
+fun vec3(x: Number, y: Number, z: Number) = Vector3f(x, y, z)
+fun vec3d(x: Number, y: Number, z: Number) = Vector3d(x, y, z)
+
+@Suppress("FunctionName")
+fun Vector4f(x: Number, y: Number, z: Number, w: Number) =
+    Vector4f(x.toFloat(), y.toFloat(), z.toFloat(), w.toFloat())
+
+@Suppress("FunctionName")
+fun Vector4d(x: Number, y: Number, z: Number, w: Number) =
+    Vector4d(x.toDouble(), y.toDouble(), z.toDouble(), w.toDouble())
+
+fun vec4(x: Number, y: Number, z: Number, w: Number) = Vector4f(x, y, z, w)
+fun vec4d(x: Number, y: Number, z: Number, w: Number) = Vector4d(x, y, z, w)
+
+fun Vector2d.toFloat() = vec2(x, y)
+fun Vector3d.toFloat() = vec3(x, y, z)
+fun Vector4d.toFloat() = vec4(x, y, z, w)
+
+fun Vector2f.toDouble() = vec2d(x, y)
+fun Vector3f.toDouble() = vec3d(x, y, z)
+fun Vector4f.toDouble() = vec4d(x, y, z, w)
+
+fun Matrix4dc.toFloat() = Matrix4f(this)
+fun Matrix3dc.toFloat() =
+    Matrix3f(
+        m00().toFloat(),
+        m01().toFloat(),
+        m02().toFloat(),
+        m10().toFloat(),
+        m11().toFloat(),
+        m12().toFloat(),
+        m20().toFloat(),
+        m21().toFloat(),
+        m22().toFloat()
+    )
+
+
+fun Matrix2dc.toFloat() =
+    Matrix2f(this.m00().toFloat(), this.m01().toFloat(), this.m10().toFloat(), this.m11().toFloat())
+
 operator fun Vector3dc.compareTo(rhs: Vector3dc): Int {
     for (i in 0 until 3) {
         val c = this[i].compareTo(rhs[i])

threedom/src/test/kotlin/me/eater/test/threedom/dom/DocumentTest.kt

@@ -109,26 +109,26 @@ class DocumentTest : StringSpec({
             triggered++
         }
 
-        newNode.classList.add(":3")
+        newNode.tagList.add(":3")
         doc.addNode(secondNewNode)
         doc.addNode(thirdNewNode)
 
-        doc.getNodesByClassName(":3") shouldHaveCount 0
+        doc.getNodesByTag(":3") shouldHaveCount 0
         thirdNewNode.addNode(newNode)
-        doc.getNodesByClassName(":3") shouldHaveSingleElement newNode
+        doc.getNodesByTag(":3") shouldHaveSingleElement newNode
-        secondNewNode.getNodesByClassName(":3") shouldHaveCount 0
+        secondNewNode.getNodesByTag(":3") shouldHaveCount 0
-        thirdNewNode.getNodesByClassName(":3") shouldHaveSingleElement newNode
+        thirdNewNode.getNodesByTag(":3") shouldHaveSingleElement newNode
         thirdNewNode.removeAll()
-        thirdNewNode.getNodesByClassName(":3") shouldHaveCount 0
+        thirdNewNode.getNodesByTag(":3") shouldHaveCount 0
-        doc.getNodesByClassName(":3") shouldHaveCount 0
+        doc.getNodesByTag(":3") shouldHaveCount 0
-        newNode.classList.clear()
+        newNode.tagList.clear()
-        newNode.classList.add(":/")
+        newNode.tagList.add(":/")
         doc.addNode(newNode)
-        doc.getNodesByClassName(":3") shouldHaveCount 0
+        doc.getNodesByTag(":3") shouldHaveCount 0
-        doc.getNodesByClassName(":/") shouldHaveSingleElement newNode
+        doc.getNodesByTag(":/") shouldHaveSingleElement newNode
-        newNode.classList.clear()
+        newNode.tagList.clear()
-        newNode.classList.add(":3")
+        newNode.tagList.add(":3")
-        doc.getNodesByClassName(":/") shouldHaveCount 0
+        doc.getNodesByTag(":/") shouldHaveCount 0
-        doc.getNodesByClassName(":3") shouldHaveSingleElement newNode
+        doc.getNodesByTag(":3") shouldHaveSingleElement newNode
     }
 })

threedom/src/test/kotlin/me/eater/test/threedom/dom/PositionTest.kt

@@ -18,9 +18,11 @@ class PositionTest : StringSpec({
         val doc: IDocument = Document()
         val node = doc.createNode<PlainNode>()
         doc.addNode(node)
+        node.shouldIndexLocation = true
         node.model { setTranslation(10, 0, 10) }
         node.absolute.translation shouldBe Vector3d(10, 0, 10)
         val nodeTwo = doc.createNode<PlainNode>()
+        nodeTwo.shouldIndexLocation = true
         node.addNode(nodeTwo)
         nodeTwo.model { setTranslation(-10, 20, 0) }
         nodeTwo.absolute.translation shouldBe Vector3d(0, 20, 10)
@@ -40,6 +42,8 @@ class PositionTest : StringSpec({
         nodeTwo.model { setTranslation(-10, 20, 0) }
         nodeThree.model { setTranslation(0, 20, 0) }
 
+        listOf(node, nodeTwo, nodeThree).forEach { it.shouldIndexLocation = true }
+
         doc.findAt(10, 0, 10) shouldHaveSingleElement node
         doc.findAt(0, 20, 10) shouldHaveSingleElement nodeTwo
         doc.findAt(0, 40, 10) shouldHaveSingleElement nodeThree
@@ -64,6 +68,8 @@ class PositionTest : StringSpec({
         nodeTwo.model { setTranslation(-10, 20, 0) }
         nodeThree.model { setTranslation(0, 20, 0) }
 
+        listOf(node, nodeTwo, nodeThree).forEach { it.shouldIndexLocation = true }
+
         val result = doc.findInRegion(Vector3d(0, 0, 0), Vector3d(0, 20, 20)).toList()
         result shouldHaveSize 1
         result shouldHaveSingleElement nodeTwo
@@ -78,6 +84,9 @@ class PositionTest : StringSpec({
         val node = doc.createNode<PlainNode>()
         val nodeTwo = doc.createNode<PlainNode>()
         val nodeThree = doc.createNode<PlainNode>()
+
+        listOf(node, nodeTwo, nodeThree).forEach { it.shouldIndexLocation = true }
+
         doc.addNode(node)
         node.addNode(nodeTwo)
         nodeTwo.addNode(nodeThree)