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Code Issues Releases Wiki Activity

Make shadows play nicely with per-vertex lighting

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This commit is contained in:
AnyOldName3 2017-09-21 01:59:02 +01:00
parent c67b3267fb
commit 26ecf2088b
5 changed files with 33 additions and 13 deletions
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34
files/shaders/lighting.glsl
View file

@ -1,21 +1,33 @@
#define MAX_LIGHTS 8
vec3 perLight(int lightIndex, vec3 viewPos, vec3 viewNormal, vec4 diffuse, vec3 ambient, float shadowing)
vec3 lightAmbient(int lightIndex, vec3 ambient)
{
return ambient * gl_LightSource[lightIndex].ambient.xyz;
}
vec3 lightDiffuse(int lightIndex, vec4 diffuse, vec3 viewNormal, vec3 lightDir)
{
return diffuse.xyz * gl_LightSource[lightIndex].diffuse.xyz * max(dot(viewNormal.xyz, lightDir), 0.0);
}
void perLight(out vec3 ambientOut, out vec3 diffuseOut, int lightIndex, vec3 viewPos, vec3 viewNormal, vec4 diffuse, vec3 ambient)
{
vec3 lightDir;
float d;
float lightDistance;
lightDir = gl_LightSource[lightIndex].position.xyz - (viewPos.xyz * gl_LightSource[lightIndex].position.w);
d = length(lightDir);
lightDir = gl_LightSource[lightIndex].position.xyz - (viewPos.xyz * gl_LightSource[lightIndex].position.w);
lightDistance = length(lightDir);
lightDir = normalize(lightDir);
float illumination = clamp(1.0 / (gl_LightSource[lightIndex].constantAttenuation + gl_LightSource[lightIndex].linearAttenuation * lightDistance + gl_LightSource[lightIndex].quadraticAttenuation * lightDistance * lightDistance), 0.0, 1.0);
return (ambient * gl_LightSource[lightIndex].ambient.xyz + diffuse.xyz * gl_LightSource[lightIndex].diffuse.xyz * max(dot(viewNormal.xyz, lightDir), 0.0)) * clamp(1.0 / (gl_LightSource[lightIndex].constantAttenuation + gl_LightSource[lightIndex].linearAttenuation * d + gl_LightSource[lightIndex].quadraticAttenuation * d * d), 0.0, 1.0) * shadowing;
ambientOut = lightAmbient(lightIndex, ambient) * illumination;
diffuseOut = lightDiffuse(lightIndex, diffuse, viewNormal, lightDir) * illumination;
}
#ifdef FRAGMENT
vec4 doLighting(vec3 viewPos, vec3 viewNormal, vec4 vertexColor, float shadowing)
#else
vec4 doLighting(vec3 viewPos, vec3 viewNormal, vec4 vertexColor)
vec4 doLighting(vec3 viewPos, vec3 viewNormal, vec4 vertexColor, out vec3 shadowDiffuse)
#endif
{
#if @colorMode == 3
@ -30,14 +42,18 @@ vec4 doLighting(vec3 viewPos, vec3 viewNormal, vec4 vertexColor)
#endif
vec4 lightResult = vec4(0.0, 0.0, 0.0, diffuse.a);
vec3 diffuseLight, ambientLight;
perLight(ambientLight, diffuseLight, 0, viewPos, viewNormal, diffuse, ambient);
#ifdef FRAGMENT
lightResult.xyz += perLight(0, viewPos, viewNormal, diffuse, ambient, shadowing);
lightResult.xyz += ambientLight + diffuseLight * shadowing;
#else
lightResult.xyz += perLight(0, viewPos, viewNormal, diffuse, ambient, 1.0);
shadowDiffuse = diffuseLight;
lightResult.xyz += ambientLight;
#endif
for (int i=1; i<MAX_LIGHTS; ++i)
{
lightResult.xyz += perLight(i, viewPos, viewNormal, diffuse, ambient, 1.0);
perLight(ambientLight, diffuseLight, i, viewPos, viewNormal, diffuse, ambient);
lightResult.xyz += ambientLight + diffuseLight;
}
lightResult.xyz += gl_LightModel.ambient.xyz * ambient;

3
files/shaders/objects_fragment.glsl
View file

@ -50,6 +50,7 @@ varying float depth;
#if !PER_PIXEL_LIGHTING
varying vec4 lighting;
varying vec3 shadowDiffuseLighting;
#else
varying vec4 passColor;
#endif
@ -120,7 +121,7 @@ void main()
float shadowing = shadow2DProj(shadowTexture, shadowSpaceCoords).r;
#if !PER_PIXEL_LIGHTING
gl_FragData[0] *= lighting * shadowing;
gl_FragData[0] *= lighting + vec4(shadowDiffuseLighting * shadowing, 0);
#else
gl_FragData[0] *= doLighting(passViewPos, normalize(viewNormal), passColor, shadowing);
#endif

3
files/shaders/objects_vertex.glsl
View file

@ -39,6 +39,7 @@ varying float depth;
#if !PER_PIXEL_LIGHTING
varying vec4 lighting;
varying vec3 shadowDiffuseLighting;
#else
varying vec4 passColor;
#endif
@ -95,7 +96,7 @@ void main(void)
#endif
#if !PER_PIXEL_LIGHTING
lighting = doLighting(viewPos.xyz, viewNormal, gl_Color);
lighting = doLighting(viewPos.xyz, viewNormal, gl_Color, shadowDiffuseLighting);
#else
passColor = gl_Color;
#endif

3
files/shaders/terrain_fragment.glsl
View file

@ -20,6 +20,7 @@ varying float depth;
#if !PER_PIXEL_LIGHTING
varying vec4 lighting;
varying vec3 shadowDiffuseLighting;
#else
varying vec4 passColor;
#endif
@ -72,7 +73,7 @@ void main()
float shadowing = shadow2DProj(shadowTexture, shadowSpaceCoords).r;
#if !PER_PIXEL_LIGHTING
gl_FragData[0] *= lighting * shadowing;
gl_FragData[0] *= lighting + vec4(shadowDiffuseLighting * shadowing, 0);
#else
gl_FragData[0] *= doLighting(passViewPos, normalize(viewNormal), passColor, shadowing);
#endif

3
files/shaders/terrain_vertex.glsl
View file

@ -7,6 +7,7 @@ varying float depth;
#if !PER_PIXEL_LIGHTING
varying vec4 lighting;
varying vec3 shadowDiffuseLighting;
#else
varying vec4 passColor;
#endif
@ -27,7 +28,7 @@ void main(void)
#if !PER_PIXEL_LIGHTING
vec3 viewNormal = normalize((gl_NormalMatrix * gl_Normal).xyz);
lighting = doLighting(viewPos.xyz, viewNormal, gl_Color);
lighting = doLighting(viewPos.xyz, viewNormal, gl_Color, shadowDiffuseLighting);
#else
passColor = gl_Color;
#endif