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314 lines
11 KiB
GLSL
314 lines
11 KiB
GLSL
#include "core.h"
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#define FOG @shGlobalSettingBool(fog)
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#define MRT @shPropertyNotBool(is_transparent) && @shGlobalSettingBool(mrt_output)
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#define LIGHTING @shGlobalSettingBool(lighting)
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#define SHADOWS_PSSM LIGHTING && @shGlobalSettingBool(shadows_pssm)
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#define SHADOWS LIGHTING && @shGlobalSettingBool(shadows)
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#if SHADOWS || SHADOWS_PSSM
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#include "shadows.h"
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#endif
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#if FOG || MRT || SHADOWS_PSSM
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#define NEED_DEPTH
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#endif
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#define UNDERWATER @shGlobalSettingBool(underwater_effects) && LIGHTING
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#define HAS_VERTEXCOLOR @shPropertyBool(has_vertex_colour)
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#ifdef SH_VERTEX_SHADER
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// ------------------------------------- VERTEX ---------------------------------------
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SH_BEGIN_PROGRAM
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shUniform(float4x4, wvp) @shAutoConstant(wvp, worldviewproj_matrix)
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shVertexInput(float2, uv0)
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shOutput(float2, UV)
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shNormalInput(float4)
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#ifdef NEED_DEPTH
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shOutput(float, depthPassthrough)
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#endif
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#if LIGHTING
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shOutput(float3, normalPassthrough)
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shOutput(float3, objSpacePositionPassthrough)
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#endif
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#if HAS_VERTEXCOLOR
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shColourInput(float4)
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shOutput(float4, colourPassthrough)
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#endif
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#if SHADOWS
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shOutput(float4, lightSpacePos0)
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shUniform(float4x4, texViewProjMatrix0) @shAutoConstant(texViewProjMatrix0, texture_viewproj_matrix)
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shUniform(float4x4, worldMatrix) @shAutoConstant(worldMatrix, world_matrix)
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#endif
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#if SHADOWS_PSSM
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@shForeach(3)
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shOutput(float4, lightSpacePos@shIterator)
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shUniform(float4x4, texViewProjMatrix@shIterator) @shAutoConstant(texViewProjMatrix@shIterator, texture_viewproj_matrix, @shIterator)
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@shEndForeach
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shUniform(float4x4, worldMatrix) @shAutoConstant(worldMatrix, world_matrix)
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#endif
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SH_START_PROGRAM
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{
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shOutputPosition = shMatrixMult(wvp, shInputPosition);
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UV = uv0;
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#if LIGHTING
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normalPassthrough = normal.xyz;
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#endif
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#ifdef NEED_DEPTH
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depthPassthrough = shOutputPosition.z;
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#endif
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#if LIGHTING
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objSpacePositionPassthrough = shInputPosition.xyz;
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#endif
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#if HAS_VERTEXCOLOR
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colourPassthrough = colour;
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#endif
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#if SHADOWS
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lightSpacePos0 = shMatrixMult(texViewProjMatrix0, shMatrixMult(worldMatrix, shInputPosition));
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#endif
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#if SHADOWS_PSSM
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float4 wPos = shMatrixMult(worldMatrix, shInputPosition);
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@shForeach(3)
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lightSpacePos@shIterator = shMatrixMult(texViewProjMatrix@shIterator, wPos);
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@shEndForeach
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#endif
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}
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#else
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// ----------------------------------- FRAGMENT ------------------------------------------
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#if UNDERWATER
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#include "underwater.h"
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#endif
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SH_BEGIN_PROGRAM
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shSampler2D(diffuseMap)
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shInput(float2, UV)
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#if MRT
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shDeclareMrtOutput(1)
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#endif
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#ifdef NEED_DEPTH
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shInput(float, depthPassthrough)
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#endif
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#if MRT
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shUniform(float, far) @shAutoConstant(far, far_clip_distance)
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#endif
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shUniform(float, gammaCorrection) @shSharedParameter(gammaCorrection, gammaCorrection)
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#if LIGHTING
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shInput(float3, normalPassthrough)
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shInput(float3, objSpacePositionPassthrough)
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shUniform(float4, lightAmbient) @shAutoConstant(lightAmbient, ambient_light_colour)
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#if !HAS_VERTEXCOLOR
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shUniform(float4, materialAmbient) @shAutoConstant(materialAmbient, surface_ambient_colour)
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#endif
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shUniform(float4, materialDiffuse) @shAutoConstant(materialDiffuse, surface_diffuse_colour)
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shUniform(float4, materialEmissive) @shAutoConstant(materialEmissive, surface_emissive_colour)
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@shForeach(@shGlobalSettingString(num_lights))
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shUniform(float4, lightPosObjSpace@shIterator) @shAutoConstant(lightPosObjSpace@shIterator, light_position_object_space, @shIterator)
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shUniform(float4, lightAttenuation@shIterator) @shAutoConstant(lightAttenuation@shIterator, light_attenuation, @shIterator)
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shUniform(float4, lightDiffuse@shIterator) @shAutoConstant(lightDiffuse@shIterator, light_diffuse_colour, @shIterator)
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@shEndForeach
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#endif
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#if FOG
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shUniform(float3, fogColour) @shAutoConstant(fogColour, fog_colour)
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shUniform(float4, fogParams) @shAutoConstant(fogParams, fog_params)
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#endif
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#if HAS_VERTEXCOLOR
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shInput(float4, colourPassthrough)
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#endif
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#if SHADOWS
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shInput(float4, lightSpacePos0)
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shSampler2D(shadowMap0)
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shUniform(float2, invShadowmapSize0) @shAutoConstant(invShadowmapSize0, inverse_texture_size, 1)
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#endif
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#if SHADOWS_PSSM
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@shForeach(3)
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shInput(float4, lightSpacePos@shIterator)
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shSampler2D(shadowMap@shIterator)
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shUniform(float2, invShadowmapSize@shIterator) @shAutoConstant(invShadowmapSize@shIterator, inverse_texture_size, @shIterator(1))
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@shEndForeach
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shUniform(float3, pssmSplitPoints) @shSharedParameter(pssmSplitPoints)
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#endif
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#if SHADOWS || SHADOWS_PSSM
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shUniform(float4, shadowFar_fadeStart) @shSharedParameter(shadowFar_fadeStart)
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#endif
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#if (UNDERWATER) || (FOG)
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shUniform(float4x4, worldMatrix) @shAutoConstant(worldMatrix, world_matrix)
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shUniform(float4, cameraPos) @shAutoConstant(cameraPos, camera_position)
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#endif
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#if UNDERWATER
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shUniform(float, waterLevel) @shSharedParameter(waterLevel)
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shUniform(float4, lightDirectionWS0) @shAutoConstant(lightDirectionWS0, light_position, 0)
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shSampler2D(causticMap)
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shUniform(float, waterTimer) @shSharedParameter(waterTimer)
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shUniform(float2, waterSunFade_sunHeight) @shSharedParameter(waterSunFade_sunHeight)
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shUniform(float, waterEnabled) @shSharedParameter(waterEnabled)
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shUniform(float3, windDir_windSpeed) @shSharedParameter(windDir_windSpeed)
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#endif
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SH_START_PROGRAM
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{
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shOutputColour(0) = shSample(diffuseMap, UV);
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shOutputColour(0).xyz = gammaCorrectRead(shOutputColour(0).xyz);
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#if LIGHTING
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float3 normal = normalize(normalPassthrough);
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float3 lightDir;
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float3 diffuse = float3(0,0,0);
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float d;
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#if HAS_VERTEXCOLOR
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// ambient vertex colour tracking, FFP behaviour
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float3 ambient = colourPassthrough.xyz * lightAmbient.xyz;
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#else
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float3 ambient = materialAmbient.xyz * lightAmbient.xyz;
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#endif
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// shadows only for the first (directional) light
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#if SHADOWS
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float shadow = depthShadowPCF (shadowMap0, lightSpacePos0, invShadowmapSize0);
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#endif
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#if SHADOWS_PSSM
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float shadow = pssmDepthShadow (lightSpacePos0, invShadowmapSize0, shadowMap0, lightSpacePos1, invShadowmapSize1, shadowMap1, lightSpacePos2, invShadowmapSize2, shadowMap2, depthPassthrough, pssmSplitPoints);
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#endif
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#if SHADOWS || SHADOWS_PSSM
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float fadeRange = shadowFar_fadeStart.x - shadowFar_fadeStart.y;
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float fade = 1-((depthPassthrough - shadowFar_fadeStart.y) / fadeRange);
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shadow = (depthPassthrough > shadowFar_fadeStart.x) ? 1.0 : ((depthPassthrough > shadowFar_fadeStart.y) ? 1.0-((1.0-shadow)*fade) : shadow);
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#endif
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#if !SHADOWS && !SHADOWS_PSSM
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float shadow = 1.0;
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#endif
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float3 caustics = float3(1,1,1);
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#if (UNDERWATER) || (FOG)
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float3 worldPos = shMatrixMult(worldMatrix, float4(objSpacePositionPassthrough,1)).xyz;
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#endif
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#if UNDERWATER
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float3 waterEyePos = float3(1,1,1);
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// NOTE: this calculation would be wrong for non-uniform scaling
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float4 worldNormal = shMatrixMult(worldMatrix, float4(normal.xyz, 0));
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waterEyePos = intercept(worldPos, cameraPos.xyz - worldPos, float3(0,1,0), waterLevel);
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caustics = getCaustics(causticMap, worldPos, waterEyePos.xyz, worldNormal.xyz, lightDirectionWS0.xyz, waterLevel, waterTimer, windDir_windSpeed);
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if (worldPos.y >= waterLevel || waterEnabled != 1.f)
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caustics = float3(1,1,1);
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#endif
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@shForeach(@shGlobalSettingString(num_lights))
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/// \todo use the array auto params for lights, and use a real for-loop with auto param "light_count" iterations
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lightDir = lightPosObjSpace@shIterator.xyz - (objSpacePositionPassthrough.xyz * lightPosObjSpace@shIterator.w);
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d = length(lightDir);
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lightDir = normalize(lightDir);
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#if @shIterator == 0
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#if (SHADOWS || SHADOWS_PSSM)
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diffuse += materialDiffuse.xyz * lightDiffuse@shIterator.xyz * (1.0 / ((lightAttenuation@shIterator.y) + (lightAttenuation@shIterator.z * d) + (lightAttenuation@shIterator.w * d * d))) * max(dot(normal, lightDir), 0) * shadow * caustics;
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#else
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diffuse += materialDiffuse.xyz * lightDiffuse@shIterator.xyz * (1.0 / ((lightAttenuation@shIterator.y) + (lightAttenuation@shIterator.z * d) + (lightAttenuation@shIterator.w * d * d))) * max(dot(normal, lightDir), 0) * caustics;
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#endif
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#else
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diffuse += materialDiffuse.xyz * lightDiffuse@shIterator.xyz * (1.0 / ((lightAttenuation@shIterator.y) + (lightAttenuation@shIterator.z * d) + (lightAttenuation@shIterator.w * d * d))) * max(dot(normal, lightDir), 0);
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#endif
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@shEndForeach
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shOutputColour(0).xyz *= (ambient + diffuse + materialEmissive.xyz);
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#endif
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#if HAS_VERTEXCOLOR && !LIGHTING
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shOutputColour(0).xyz *= colourPassthrough.xyz;
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#endif
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#if FOG
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float fogValue = shSaturate((length(cameraPos.xyz-worldPos) - fogParams.y) * fogParams.w);
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#if UNDERWATER
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// regular fog only if fragment is above water
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if (worldPos.y > waterLevel || waterEnabled != 1.f)
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#endif
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shOutputColour(0).xyz = shLerp (shOutputColour(0).xyz, gammaCorrectRead(fogColour), fogValue);
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#endif
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// prevent negative colour output (for example with negative lights)
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shOutputColour(0).xyz = max(shOutputColour(0).xyz, float3(0,0,0));
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#if UNDERWATER
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float fogAmount = (cameraPos.y > waterLevel)
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? shSaturate(length(waterEyePos-worldPos) / VISIBILITY)
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: shSaturate(length(cameraPos.xyz-worldPos)/ VISIBILITY);
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float3 eyeVec = normalize(cameraPos.xyz-worldPos);
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float waterSunGradient = dot(eyeVec, -normalize(lightDirectionWS0.xyz));
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waterSunGradient = shSaturate(pow(waterSunGradient*0.7+0.3,2.0));
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float3 waterSunColour = gammaCorrectRead(float3(0.0,1.0,0.85)) *waterSunGradient * 0.5;
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float waterGradient = dot(eyeVec, float3(0.0,-1.0,0.0));
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waterGradient = clamp((waterGradient*0.5+0.5),0.2,1.0);
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float3 watercolour = ( gammaCorrectRead(float3(0.0078, 0.5176, 0.700))+waterSunColour)*waterGradient*2.0;
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watercolour = shLerp(watercolour*0.3*waterSunFade_sunHeight.x, watercolour, shSaturate(1.0-exp(-waterSunFade_sunHeight.y*SUN_EXT)));
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watercolour = (cameraPos.y <= waterLevel) ? watercolour : watercolour*0.3;
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float darkness = VISIBILITY*2.0;
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darkness = clamp((waterEyePos.y - waterLevel + darkness)/darkness,0.2,1.0);
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watercolour *= darkness;
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float isUnderwater = (worldPos.y < waterLevel) ? 1.0 : 0.0;
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shOutputColour(0).xyz = shLerp (shOutputColour(0).xyz, watercolour, fogAmount * isUnderwater * waterEnabled);
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#endif
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shOutputColour(0).xyz = gammaCorrectOutput(shOutputColour(0).xyz);
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#if MRT
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shOutputColour(1) = float4(depthPassthrough / far,1,1,1);
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#endif
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}
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#endif
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