13 lines
No EOL
570 B
Text
13 lines
No EOL
570 B
Text
/*
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contributors: [Stefan Gustavson, Ian McEwan]
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description: Fast, accurate inverse square root.
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use: <float|float2|float3|float4> taylorInvSqrt(<float|float2|float3|float4> x)
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*/
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#ifndef FNC_TAYLORINVSQRT
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#define FNC_TAYLORINVSQRT
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float taylorInvSqrt(float r) { return 1.79284291400159 - 0.85373472095314 * r; }
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float2 taylorInvSqrt(float2 r) { return 1.79284291400159 - 0.85373472095314 * r; }
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float3 taylorInvSqrt(float3 r) { return 1.79284291400159 - 0.85373472095314 * r; }
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float4 taylorInvSqrt(float4 r) { return 1.79284291400159 - 0.85373472095314 * r; }
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#endif |