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Fix TilemapGPULayer rendering at double its position #7335

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Fix TilemapGPULayer rendering at double its position #7335

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13 changes: 9 additions & 4 deletions src/renderer/webgl/renderNodes/submitter/SubmitterTilemapGPULayer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -515,11 +515,16 @@ var SubmitterTilemapGPULayer = new Class({
calcMatrix.multiply(spriteMatrix);

// Compute output quad.
// The layer's x/y position is already baked into `spriteMatrix` (via
// `applyITRS`) and thus into `calcMatrix`, so the quad must be built
// from local coordinates (0, 0)-(width, height). Passing the absolute
// x/y here would apply the position twice, offsetting the layer by
// (x, y) (i.e. rendering a layer placed at (x, y) at (2x, 2y)).
calcMatrix.setQuad(
x,
y,
x + width,
y + height,
0,
0,
width,
height,
quad
);

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