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Add OpenSimplex2, alternative to Simplex. #43
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Auburn
reviewed
Apr 25, 2020
| SIMDf score0yr = SIMDf_ABS(d0yr); | ||
| SIMDf score0zr = SIMDf_ABS(d0zr); | ||
| MASK dir0xr = SIMDf_LESS_EQUAL(SIMDf_MAX(score0yr, score0zr), score0xr); | ||
| MASK dir0yr = SIMDi_AND_NOT(dir0xr, SIMDf_LESS_EQUAL(SIMDf_MAX(score0zr, score0xr), score0yr)); |
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| MASK dir0yr = SIMDi_AND_NOT(dir0xr, SIMDf_LESS_EQUAL(SIMDf_MAX(score0zr, score0xr), score0yr)); | |
| MASK dir0yr = MASK_AND_NOT(dir0xr, SIMDf_LESS_EQUAL(SIMDf_MAX(score0zr, score0xr), score0yr)); |
Auburn
reviewed
Apr 25, 2020
| SIMDf score0zr = SIMDf_ABS(d0zr); | ||
| MASK dir0xr = SIMDf_LESS_EQUAL(SIMDf_MAX(score0yr, score0zr), score0xr); | ||
| MASK dir0yr = SIMDi_AND_NOT(dir0xr, SIMDf_LESS_EQUAL(SIMDf_MAX(score0zr, score0xr), score0yr)); | ||
| MASK dir0zr = SIMDi_NOT(SIMDi_OR(dir0xr, dir0yr)); |
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Suggested change
| MASK dir0zr = SIMDi_NOT(SIMDi_OR(dir0xr, dir0yr)); | |
| MASK dir0zr = MASK_NOT(MASK_OR(dir0xr, dir0yr)); |
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Some users may not want to use the original Simplex 3D noise algorithm in the US at the current time. Adding alternative algorithm "OpenSimplex2" based on this and this. HastyNoise already added this in this pull request.
It's maybe 6% slower than Simplex (tested using GetNoiseSet without displaying the image) and got 539ms vs 504ms for 4096x4096x1, but some people in the US may want/need to use this instead until Jan 2022.