Created
June 2, 2020 05:29
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球体内部のランダムな点
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| // Generate random number | |
| float rand(float2 co) | |
| { | |
| return frac(sin(dot(co.xy, float2(12.9898, 78.233))) * 43758.5453); | |
| } | |
| // 半径1の球体の内部のランダムな点 | |
| float3 randomInsideUnitSphere(float co) | |
| { | |
| float phi = 2 * PI * rand(co); | |
| float th = acos(1.0 - 2.0 * rand(co + float2(0.0, 1.0))); | |
| float r = pow(rand(co + float2(0.0, 0.2)), 0.333333333); | |
| float x = r * sin(th) * cos(phi); | |
| float y = r * sin(th) * sin(phi); | |
| float z = r * cos(th); | |
| return float3(x, y, z); | |
| } |
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