Extra floating point safety...

fuzzie360 · fuzzie360 · commit 4a173b065b3d · 2016-03-01T14:01:58.000+08:00
diff --git a/src/backend/mode_gpu.js b/src/backend/mode_gpu.js
@@ -362,10 +362,11 @@
 					'	vec3 xyz = vec3(floor(x + 0.5), floor(y + 0.5), floor(z + 0.5));',
 					(opt.wraparound ? '	xyz = mod(xyz, texDim);' : ''),
 					'	float index = (xyz.z * texDim.x * texDim.y) + (xyz.y * texDim.x) + xyz.x;',
-					'	float t = (floor(index / texSize.x) + 0.5);',
+					'	float t = floor(index / texSize.x);',
 					'	float s = mod(index, texSize.x);',
 					(opt.safeTextureReadHack ? 's += 1.0; t += 1.0;' : ''),
 					'	s = (s < 0.5) ? 0.0 : s + 0.5;',
+					'	t = (t < 0.5) ? 0.0 : t + 0.5;',
 					(opt.safeTextureReadHack ? 'return decode32(texture2D(tex, vec2(s / (texSize.x + 2.0), t / (texSize.y + 2.0))));' : ''),
 					'	return decode32(texture2D(tex, vec2(s / texSize.x, t / texSize.y)));',
 					'}',
