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by pixelesque
2 hours ago
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Inverse is still 0.0 technically, but yes, there is a trick you can use with Inf and SIMD to mask them out, so Inf is sometimes used. However, I'd just condition it for the moment. so: invDirX = dirX != 0.0 ? 1.0 / dirX : 0.0;
etc, etc for each dimension. Obviously doing the != 0.0 comparison is not great, as it suffers from potential issues again (especially if you have denormals), but you can generally get away with it I've found in most cases. |
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