32 lines
1.3 KiB
GLSL
32 lines
1.3 KiB
GLSL
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#version 450
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layout(location = 0) in vec3 in_position;
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layout(location = 1) in vec3 in_color;
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layout(location = 0) out vec3 frag_color;
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layout(push_constant) uniform PushConstants {
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mat4 mvp;
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// xyz is the chunk's world offset; w is the debug-tint weight, 0.0 for normal rendering and 1.0 for a debug raster pass.
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vec4 chunk_offset;
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} push_constants;
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// Colour applied to debug raster passes, chosen to contrast with terrain and to remain legible when overlaid on filled geometry.
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const vec3 DEBUG_COLOR = vec3(1.0, 0.0, 1.0);
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// Size, in pixels, of the points emitted under VK_POLYGON_MODE_POINT. Sizes above 1.0 require the largePoints device feature.
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const float DEBUG_POINT_SIZE = 5.0;
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void main() {
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// The chunk-local vertex is shifted into world space by the per-chunk offset before projection.
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vec3 world_position = in_position + push_constants.chunk_offset.xyz;
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gl_Position = push_constants.mvp * vec4(world_position, 1.0);
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// Point size is consulted whenever the polygon mode is POINT; leaving it unwritten renders points of undefined size. It is ignored by the FILL and LINE pipelines, so it is written unconditionally.
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gl_PointSize = DEBUG_POINT_SIZE;
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float debug_tint = push_constants.chunk_offset.w;
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frag_color = mix(in_color, DEBUG_COLOR, debug_tint);
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}
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