if (nParticleShape1.collisionU >0)

{

float $U=nParticleShape1.collisionU;

float $V=nParticleShape1.collisionV;

vector $colRGB = `colorAtPoint -o RGB -u $U -v $V ramp2`;

nParticleShape1.rgbPP = $colRGB;

}

获取 UV 向量处的颜色

vector $colRGB = `colorAtPoint -o RGB -u $U -v $V ramp2`;