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LibSoftGPU: Transform normals during T&L stage

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As well as Vertex Positions, the normals also need to be transformed
into eye-space so that lighting can be applied correctly.
This commit is contained in:
Jesse Buhagiar 2022-01-10 00:41:36 +11:00 • committed by Linus Groh
parent 4035532ee8
commit 5a1f559ed9
1 changed files with 5 additions and 0 deletions
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5
Userland/Libraries/LibSoftGPU/Device.cpp
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@ -636,6 +636,11 @@ void Device::draw_primitives(PrimitiveType primitive_type, FloatMatrix4x4 const&
triangle.vertices[1].eye_coordinates = model_view_transform * triangle.vertices[1].position;
triangle.vertices[2].eye_coordinates = model_view_transform * triangle.vertices[2].position;
// Transform the vertex normals into eye-space
triangle.vertices[0].normal = transform_direction(model_view_transform, triangle.vertices[0].normal);
triangle.vertices[1].normal = transform_direction(model_view_transform, triangle.vertices[1].normal);
triangle.vertices[2].normal = transform_direction(model_view_transform, triangle.vertices[2].normal);
// Transform eye coordinates into clip coordinates using the projection transform
triangle.vertices[0].clip_coordinates = projection_transform * triangle.vertices[0].eye_coordinates;
triangle.vertices[1].clip_coordinates = projection_transform * triangle.vertices[1].eye_coordinates;