本文整理汇总了C++中ofQuaternion::asVec4方法的典型用法代码示例。如果您正苦于以下问题：C++ ofQuaternion::asVec4方法的具体用法？C++ ofQuaternion::asVec4怎么用？C++ ofQuaternion::asVec4使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ofQuaternion的用法示例。
在下文中一共展示了ofQuaternion::asVec4方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: slerp
/// Spherical Linear Interpolation
/// As t goes from 0 to 1, the Quat object goes from "from" to "to"
/// Reference: Shoemake at SIGGRAPH 89
/// See also
/// http://www.gamasutra.com/features/programming/19980703/quaternions_01.htm
void ofQuaternion::slerp( float t, const ofQuaternion& from, const ofQuaternion& to ) {
const double epsilon = 0.00001;
double omega, cosomega, sinomega, scale_from, scale_to ;
ofQuaternion quatTo(to);
// this is a dot product
cosomega = from.asVec4().dot(to.asVec4());
if ( cosomega < 0.0 ) {
cosomega = -cosomega;
quatTo = -to;
}
if ( (1.0 - cosomega) > epsilon ) {
omega = acos(cosomega) ; // 0 <= omega <= Pi (see man acos)
sinomega = sin(omega) ; // this sinomega should always be +ve so
// could try sinomega=sqrt(1-cosomega*cosomega) to avoid a sin()?
scale_from = sin((1.0 - t) * omega) / sinomega ;
scale_to = sin(t * omega) / sinomega ;
} else {
/* --------------------------------------------------
The ends of the vectors are very close
we can use simple linear interpolation - no need
to worry about the "spherical" interpolation
-------------------------------------------------- */
scale_from = 1.0 - t ;
scale_to = t ;
}
*this = (from * scale_from) + (quatTo * scale_to);
// so that we get a Vec4
}