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Work in the normal calculations

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Eryn Wells 2018-11-11 21:04:03 -05:00
parent f6f01b6419
commit e62dd1b0f2
3 changed files with 43 additions and 12 deletions
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15
Terrain2/Shaders/TerrainAlgorithms.metal
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@ -61,13 +61,16 @@ kernel void updateGeometryHeights(texture2d<float> texture [[texture(GeneratorTe
vertexes[vIdx].y = height.r;
}
kernel void updateGeometryNormals(texture2d<float> texture [[texture(GeneratorTextureIndexIn)]],
constant float3 *vertexes [[buffer(GeneratorBufferIndexVertexes)]],
constant float2 *texCoords [[buffer(GeneratorBufferIndexTexCoords)]],
constant uint *indexes [[buffer(GeneratorBufferIndexIndexes)]],
constant Uniforms &uniforms [[buffer(GeneratorBufferIndexUniforms)]],
uint2 tid [[thread_position_in_grid]])
kernel void updateGeometryNormals(constant float3 *vertexes [[buffer(GeneratorBufferIndexVertexes)]],
constant packed_uint3 *indexes [[buffer(GeneratorBufferIndexIndexes)]],
device packed_float3 *normals [[buffer(GeneratorBufferIndexNormals)]],
uint tid [[thread_position_in_grid]])
{
const uint3 triIdx = indexes[tid];
float3 side1(vertexes[triIdx.y] - vertexes[triIdx.x]);
float3 side2(vertexes[triIdx.y] - vertexes[triIdx.z]);
float3 normal(normalize(cross(side1, side2)));
normals[tid] = normal;
}
#pragma mark - ZeroGenerator