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Diffstat (limited to 'demo/d3d11/shaders/diffuseGS.hlsl')
| -rw-r--r-- | demo/d3d11/shaders/diffuseGS.hlsl | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/demo/d3d11/shaders/diffuseGS.hlsl b/demo/d3d11/shaders/diffuseGS.hlsl new file mode 100644 index 0000000..e7a92db --- /dev/null +++ b/demo/d3d11/shaders/diffuseGS.hlsl @@ -0,0 +1,176 @@ +#include "shaderCommon.h" + +cbuffer constBuf : register(b0) +{ + DiffuseShaderConst gParams; +}; + +static const float2 corners[4] = +{ + float2(0.0, 1.0), + float2(0.0, 0.0), + float2(1.0, 1.0), + float2(1.0, 0.0) +}; + +[maxvertexcount(4)] +void diffuseGS(point DiffuseVertexOut input[1], inout TriangleStream<DiffuseGeometryOut> triStream) +{ + float4 ndcPos = input[0].ndcPos; + + // frustrum culling + const float ndcBound = 1.0; + if (ndcPos.x < -ndcBound) return; + if (ndcPos.x > ndcBound) return; + if (ndcPos.y < -ndcBound) return; + if (ndcPos.y > ndcBound) return; + + float pointScale = gParams.diffuseScale; + float velocityScale = 1.0; + + float3 v = input[0].viewVel.xyz; + float3 p = input[0].viewPos.xyz; + + // billboard in eye space + float3 u = float3(0.0, pointScale, 0.0); + float3 l = float3(pointScale, 0.0, 0.0); + + // increase size based on life + float lifeTime = input[0].worldPos.w; + + float lifeFade = lerp(1.0f + gParams.diffusion, 1.0, min(1.0, lifeTime*0.25f)); + u *= lifeFade; + l *= lifeFade; + + float fade = 1.0/(lifeFade*lifeFade); + float vlen = length(v)*gParams.motionBlurScale; + + if (vlen > 0.5) + { + float len = max(pointScale, vlen*0.016); + fade = min(1.0, 2.0/(len/pointScale)); + + u = normalize(v)*max(pointScale, vlen*0.016); // assume 60hz + l = normalize(cross(u, float3(0.0, 0.0, -1.0)))*pointScale; + } + + + { + + DiffuseGeometryOut output; + + output.worldPos = input[0].worldPos; // vertex world pos (life in w) + output.viewPos = input[0].viewPos; // vertex eye pos + output.viewVel.xyz = input[0].viewVel.xyz; // vertex velocity in view space + output.viewVel.w = fade; + output.lightDir = mul(gParams.modelView, float4(gParams.lightDir, 0.0)); + output.color = input[0].color; + + output.uv = float4(0.0, 1.0, 0.0, 0.0); + output.clipPos = mul(gParams.projection, float4(p + u - l, 1.0)); + triStream.Append(output); + + output.uv = float4(0.0, 0.0, 0.0, 0.0); + output.clipPos = mul(gParams.projection, float4(p - u - l, 1.0)); + triStream.Append(output); + + output.uv = float4(1.0, 1.0, 0.0, 0.0); + output.clipPos = mul(gParams.projection, float4(p + u + l, 1.0)); + triStream.Append(output); + + output.uv = float4(1.0, 0.0, 0.0, 0.0); + output.clipPos = mul(gParams.projection, float4(p - u + l, 1.0)); + triStream.Append(output); + } + +} + +#if 0 + + +const char *geometryDiffuseShader = +"#version 120\n" +"#extension GL_EXT_geometry_shader4 : enable\n" +STRINGIFY( + +uniform float pointScale; // point size in world space +uniform float motionBlurScale; +uniform float diffusion; +uniform vec3 lightDir; + +void main() +{ + vec4 ndcPos = gl_TexCoordIn[0][5]; + + // frustrum culling + const float ndcBound = 1.0; + if (ndcPos.x < -ndcBound) return; + if (ndcPos.x > ndcBound) return; + if (ndcPos.y < -ndcBound) return; + if (ndcPos.y > ndcBound) return; + + float velocityScale = 1.0; + + vec3 v = gl_TexCoordIn[0][3].xyz*velocityScale; + vec3 p = gl_TexCoordIn[0][2].xyz; + + // billboard in eye space + vec3 u = vec3(0.0, pointScale, 0.0); + vec3 l = vec3(pointScale, 0.0, 0.0); + + // increase size based on life + float lifeFade = mix(1.0f+diffusion, 1.0, min(1.0, gl_TexCoordIn[0][1].w*0.25f)); + u *= lifeFade; + l *= lifeFade; + + //lifeFade = 1.0; + + float fade = 1.0/(lifeFade*lifeFade); + float vlen = length(v)*motionBlurScale; + + if (vlen > 0.5) + { + float len = max(pointScale, vlen*0.016); + fade = min(1.0, 2.0/(len/pointScale)); + + u = normalize(v)*max(pointScale, vlen*0.016); // assume 60hz + l = normalize(cross(u, vec3(0.0, 0.0, -1.0)))*pointScale; + } + + { + + gl_TexCoord[1] = gl_TexCoordIn[0][1]; // vertex world pos (life in w) + gl_TexCoord[2] = gl_TexCoordIn[0][2]; // vertex eye pos + gl_TexCoord[3] = gl_TexCoordIn[0][3]; // vertex velocity in view space + gl_TexCoord[3].w = fade; + gl_TexCoord[4] = gl_ModelViewMatrix*vec4(lightDir, 0.0); + gl_TexCoord[4].w = gl_TexCoordIn[0][3].w; // attenuation + gl_TexCoord[5].xyzw = gl_TexCoordIn[0][4].xyzw; // color + + float zbias = 0.0f;//0.00125*2.0; + + gl_TexCoord[0] = vec4(0.0, 1.0, 0.0, 0.0); + gl_Position = gl_ProjectionMatrix * vec4(p + u - l, 1.0); + gl_Position.z -= zbias; + EmitVertex(); + + gl_TexCoord[0] = vec4(0.0, 0.0, 0.0, 0.0); + gl_Position = gl_ProjectionMatrix * vec4(p - u - l, 1.0); + gl_Position.z -= zbias; + EmitVertex(); + + gl_TexCoord[0] = vec4(1.0, 1.0, 0.0, 0.0); + gl_Position = gl_ProjectionMatrix * vec4(p + u + l, 1.0); + gl_Position.z -= zbias; + EmitVertex(); + + gl_TexCoord[0] = vec4(1.0, 0.0, 0.0, 0.0); + gl_Position = gl_ProjectionMatrix * vec4(p - u + l, 1.0); + gl_Position.z -= zbias; + EmitVertex(); + } +} +); + + +#endif
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