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Fixed texture sampling for out-of-bounds texcoords, closes #107

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This commit is contained in:
Lucas Dower 2023-01-29 23:19:58 +00:00
parent d67308a594
commit 268acb5b80
1 changed files with 11 additions and 3 deletions
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14
src/texture.ts
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@ -104,6 +104,14 @@ export class Texture {
}
}
private _correctTexcoord(a: number) {
if (a === 1.0) {
return 1.0;
}
const frac = Math.abs(a) - Math.floor(Math.abs(a));
return a < 0.0 ? 1.0 - frac : frac;
}
/**
* UV can be in any range and is not limited to [0, 1]
*/
@ -114,13 +122,13 @@ export class Texture {
uv.u = clamp(inUV.u, 0.0, 1.0);
uv.v = clamp(inUV.v, 0.0, 1.0);
} else {
uv.u = Math.abs(inUV.u) - Math.floor(Math.abs(inUV.u));
uv.v = Math.abs(inUV.v) - Math.floor(Math.abs(inUV.v));
uv.u = this._correctTexcoord(inUV.u);
uv.v = this._correctTexcoord(inUV.v);
}
ASSERT(uv.u >= 0.0 && uv.u <= 1.0, 'Texcoord UV.u OOB');
ASSERT(uv.v >= 0.0 && uv.v <= 1.0, 'Texcoord UV.v OOB');
uv.v = 1.0 - uv.v;
const diffuse = (interpolation === 'nearest') ?
this._getNearestRGBA(this._image, uv) :
this._getLinearRGBA(this._image, uv);