求助，空间旋转C代码转易

我爱爱爱 · 发表于 2017-10-17 03:48:55

void Rotate_Point3D(float theta, float nx, float ny, float nz, float (&ptIn)[3], float (&ptOut)[3])
{
float len = sqrtf(nx * nx + ny * ny + nz * nz); //单位化
nx /= len;       ny /= len;          nz /= len;
ptOut[0] =  ptIn[0] * (cosf(theta) + nx * nx * (1 - cosf(theta))) + //transform by matrix
  ptIn[1] * (nx * ny * (1 - cosf(theta)) - nz * sinf(theta)) +
  ptIn[2] * (nx * nz * (1 - cosf(theta) + ny * sinf(theta)));
ptOut[1] = ptIn[0] * (nx * ny * (1 - cosf(theta)) + nz * sinf(theta)) +
  ptIn[1] * (ny * ny * (1 - cosf(theta)) + cosf(theta)) +
  ptIn[2] * (ny * nz * (1 - cosf(theta)) - nx * sinf(theta));
ptOut[2] = ptIn[0] * (nx * nz * (1 - cosf(theta) - ny * sinf(theta))) +
  ptIn[1] * (ny * nz * (1 -cosf(theta)) + nx * sinf(theta)) +
  ptIn[2] * (nz * nz * (1 - cosf(theta)) + cosf(theta));
}

№逝去 · 发表于 2017-10-17 04:52:39

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JueWar · 发表于 2017-10-17 06:03:50

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麻辣鸡丝 · 发表于 2017-10-24 12:57:34

我会，付费解答

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[易语言] 求助，空间旋转C代码转易