46 lines
No EOL
1.2 KiB
GLSL
46 lines
No EOL
1.2 KiB
GLSL
#version 330 core
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layout (location = 0) in vec3 aPos;
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layout (location = 1) in vec2 aTexCoord;
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layout (location = 2) in int aTileIndex;
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layout (location = 3) in int aTextureIndex;
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layout (location = 4) in int aTilesPerRow;
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layout (location = 5) in int aStartIndex;
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layout (location = 6) in vec2 aOriginalSize;
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layout (location = 7) in mat4 aModel;
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uniform vec2 uCanvasSize;
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uniform mat4 projection;
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uniform mat4 view;
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out vec2 texCoord;
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flat out int textureIndex;
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void main()
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{
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int tilesPerRow = aTilesPerRow;
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float tileSize = 1.0 / aTilesPerRow;
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// Slightly stretch the vertices to cover slight gaps
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vec2 expansion = normalize(aPos.xy) * 0.001 * (1.0 / aTilesPerRow);
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vec2 adjusted = aPos.xy + expansion;
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gl_Position = projection * view * aModel * vec4(adjusted, aPos.z, 1.0);
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textureIndex = aTextureIndex;
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if (aTileIndex != 0)
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{
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vec2 scale = vec2(aOriginalSize.x / uCanvasSize.x, aOriginalSize.y / uCanvasSize.y);
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int index = aTileIndex - aStartIndex;
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int row = index / tilesPerRow;
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int col = index % tilesPerRow;
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texCoord.x = (aTexCoord.x + col) * tileSize;
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texCoord.y = (aTexCoord.y + row) * tileSize;
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texCoord = texCoord * scale;
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}
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else
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{
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texCoord.x = 0.0;
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texCoord.y = 0.0;
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}
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} |