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b2caa0be9e
Fixes a very minor issue with the shake effect where all the scene elements don't move with the same offset.
29 lines
666 B
Plaintext
29 lines
666 B
Plaintext
in vec2 position;
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in vec2 texcoord;
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uniform vec2 verOffsetXY;
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uniform vec2 verSizeWH;
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uniform vec2 viewport;
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uniform bool snapToGrid;
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out vec2 Texcoord;
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void main() {
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Texcoord = texcoord;
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// Coordinates are [0.0; 1.0], transform to [-1.0; 1.0]
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vec2 pos = verOffsetXY + position * verSizeWH;
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if (snapToGrid) {
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// Align vertex coordinates to the native pixel grid
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// This ensures text does not get garbled by nearest neighbors scaling
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pos.x = floor(pos.x * viewport.x + 0.5) / viewport.x;
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pos.y = floor(pos.y * viewport.y + 0.5) / viewport.y;
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}
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pos.x = pos.x * 2.0 - 1.0;
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pos.y = -1.0 * (pos.y * 2.0 - 1.0);
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gl_Position = vec4(pos, 0.0, 1.0);
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}
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