b0d116632c
* Add the ability to modify clip space coordinates in the vertex shader This introduces MaterialVertexInputs.clipSpaceTransform, a mat4 that is applied to gl_Position before exiting the vertex stage. * Address code review comments
79 lines
1.8 KiB
GLSL
79 lines
1.8 KiB
GLSL
struct MaterialVertexInputs {
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#ifdef HAS_ATTRIBUTE_COLOR
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vec4 color;
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#endif
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#ifdef HAS_ATTRIBUTE_UV0
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vec2 uv0;
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#endif
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#ifdef HAS_ATTRIBUTE_UV1
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vec2 uv1;
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#endif
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#ifdef VARIABLE_CUSTOM0
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vec4 VARIABLE_CUSTOM0;
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#endif
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#ifdef VARIABLE_CUSTOM1
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vec4 VARIABLE_CUSTOM1;
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#endif
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#ifdef VARIABLE_CUSTOM2
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vec4 VARIABLE_CUSTOM2;
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#endif
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#ifdef VARIABLE_CUSTOM3
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vec4 VARIABLE_CUSTOM3;
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#endif
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#ifdef HAS_ATTRIBUTE_TANGENTS
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vec3 worldNormal;
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#endif
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vec4 worldPosition;
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#ifdef MATERIAL_HAS_CLIP_SPACE_TRANSFORM
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mat4 clipSpaceTransform;
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#endif
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};
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// Workaround for a driver bug on ARM Bifrost GPUs. Assigning a structure member
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// (directly or inside an expression) to an invariant causes a driver crash.
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vec4 getWorldPosition(const MaterialVertexInputs material) {
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return material.worldPosition;
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}
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#ifdef MATERIAL_HAS_CLIP_SPACE_TRANSFORM
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mat4 getClipSpaceTransform(const MaterialVertexInputs material) {
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return material.clipSpaceTransform;
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}
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#endif
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void initMaterialVertex(out MaterialVertexInputs material) {
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#ifdef HAS_ATTRIBUTE_COLOR
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material.color = mesh_color;
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#endif
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#ifdef HAS_ATTRIBUTE_UV0
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#ifdef FLIP_UV_ATTRIBUTE
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material.uv0 = vec2(mesh_uv0.x, 1.0 - mesh_uv0.y);
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#else
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material.uv0 = mesh_uv0;
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#endif
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#endif
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#ifdef HAS_ATTRIBUTE_UV1
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#ifdef FLIP_UV_ATTRIBUTE
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material.uv1 = vec2(mesh_uv1.x, 1.0 - mesh_uv1.y);
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#else
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material.uv1 = mesh_uv1;
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#endif
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#endif
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#ifdef VARIABLE_CUSTOM0
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material.VARIABLE_CUSTOM0 = vec4(0.0);
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#endif
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#ifdef VARIABLE_CUSTOM1
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material.VARIABLE_CUSTOM1 = vec4(0.0);
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#endif
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#ifdef VARIABLE_CUSTOM2
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material.VARIABLE_CUSTOM2 = vec4(0.0);
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#endif
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#ifdef VARIABLE_CUSTOM3
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material.VARIABLE_CUSTOM3 = vec4(0.0);
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#endif
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material.worldPosition = computeWorldPosition();
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#ifdef MATERIAL_HAS_CLIP_SPACE_TRANSFORM
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material.clipSpaceTransform = mat4(1.0);
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#endif
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}
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