AxioDL
/
zeus
mirror of https://github.com/AxioDL/zeus.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Non-inverted lookAt implementation

This commit is contained in:
Jack Andersen 2016-04-04 15:50:27 -10:00
parent 9762710b85
commit 65a49aca92
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/Math.cpp
View File

@ -73,16 +73,18 @@ CTransform lookAt(const CVector3f& pos, const CVector3f& lookPos, const CVector3
{ {
CVector3f vLook,vRight,vUp; CVector3f vLook,vRight,vUp;
vLook = pos - lookPos; vLook = lookPos - pos;
if (vLook.magnitude() < FLT_EPSILON)
vLook = {0.f, 1.f, 0.f};
vLook.normalize(); vLook.normalize();
vRight = up.cross(vLook); vRight = vLook.cross(up);
vRight.normalize(); vRight.normalize();
vUp = vLook.cross(vRight); vUp = vRight.cross(vLook);
CMatrix3f rmBasis(vRight, vUp, vLook); CMatrix3f rmBasis(vRight, vLook, vUp);
return CTransform(rmBasis.transposed(), CVector3f(-pos.dot(vRight), -pos.dot(vUp), -pos.dot(vLook))); return CTransform(rmBasis, pos);
} }
CVector3f getBezierPoint(const CVector3f& a, const CVector3f& b, const CVector3f& c, const CVector3f& d, float t) CVector3f getBezierPoint(const CVector3f& a, const CVector3f& b, const CVector3f& c, const CVector3f& d, float t)