public static GLShader GeometryShaderCascaded()
{
return(GLShader.CreateGeometryShader <PerVertexOut> (3,
CascadedShadowUniforms.MapCount, PrimitiveType.Triangles,
PrimitiveType.TriangleStrip, () =>
from p in Shader.Inputs <Primitive> ()
from u in Shader.Uniforms <Shadows> ()
from c in Shader.Uniforms <CascadedShadowUniforms> ()
let viewLight = (!c.viewLightMatrices)[p.gl_InvocationID]
select new PerVertexOut[3]
{
new PerVertexOut()
{
gl_Position = ShadowShaders.ClampToNearPlane(viewLight * p.gl_in[0].gl_Position),
gl_Layer = p.gl_InvocationID
},
new PerVertexOut()
{
gl_Position = ShadowShaders.ClampToNearPlane(viewLight * p.gl_in[1].gl_Position),
gl_Layer = p.gl_InvocationID
},
new PerVertexOut()
{
gl_Position = ShadowShaders.ClampToNearPlane(viewLight * p.gl_in[2].gl_Position),
gl_Layer = p.gl_InvocationID
}
}
));
}
public static GLShader Passthrough <P, V> ()
where P : Primitive
where V : PerVertexOut, new ()
{
return(GLShader.CreateGeometryShader <V> (3, 0,
PrimitiveType.Triangles, PrimitiveType.TriangleStrip, () =>
from p in Shader.Inputs <P> ()
select new V[3]
{
new V()
{
gl_Position = p.gl_in[0].gl_Position, gl_Layer = 0
},
new V()
{
gl_Position = p.gl_in[1].gl_Position, gl_Layer = 0
},
new V()
{
gl_Position = p.gl_in[2].gl_Position, gl_Layer = 0
}
}
));
}