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Pass through uniforms for normals, which means different colors for vertex and face normals!

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This commit is contained in:
Eryn Wells 2018-11-22 08:52:15 -07:00
parent d3298f11a7
commit 55e63cd2cc
3 changed files with 68 additions and 14 deletions
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33
Terrain2/Shaders/Shaders.metal
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@ -94,22 +94,39 @@ fragment float4 fragmentShader(ColorInOut in [[stage_in]],
#pragma mark - Normal Shaders
vertex float4 normalVertexShader(constant packed_float3 *positions [[buffer(NormalBufferIndexPoints)]],
constant packed_float3 *normals [[buffer(NormalBufferIndexNormals)]],
constant Uniforms &uniforms [[buffer(NormalBufferIndexUniforms)]],
uint instID [[instance_id]],
uint vertID [[vertex_id]])
struct NormalInOut {
float4 position [[position]];
float3 color;
};
vertex NormalInOut normalVertexShader(constant packed_float3 *positions [[buffer(NormalBufferIndexPoints)]],
constant packed_float3 *normals [[buffer(NormalBufferIndexNormals)]],
constant Uniforms &uniforms [[buffer(NormalBufferIndexGeometryUniforms)]],
constant NormalUniforms &normalUniforms [[buffer(NormalBufferIndexNormalUniforms)]],
constant NormalType &type [[buffer(NormalBufferIndexType)]],
uint instID [[instance_id]],
uint vertID [[vertex_id]])
{
NormalInOut out;
float3 v = positions[instID];
if ( vertID == 1 )
{
v += 0.25 * normals[instID];
}
float4 out = uniforms.projectionMatrix * uniforms.modelViewMatrix * float4(v, 1);
out.position = uniforms.projectionMatrix * uniforms.modelViewMatrix * float4(v, 1);
if (type == NormalTypeFace) {
out.color = normalUniforms.faceNormalColor;
} else {
out.color = normalUniforms.vertexNormalColor;
}
return out;
}
fragment half4 normalFragmentShader()
fragment float4 normalFragmentShader(NormalInOut in [[stage_in]],
constant Uniforms &uniforms [[buffer(NormalBufferIndexGeometryUniforms)]],
constant NormalUniforms &normalUniforms [[buffer(NormalBufferIndexNormalUniforms)]])
{
return half4(0, 1, 0, 1);
return float4(in.color, 1.0);
}