nuclear@0: #include "vmathmat.h"
nuclear@0: #include "vmath.h"
nuclear@0: 
nuclear@0: void Matrix4x4::lookat(const Vector3 &pos, const Vector3 &targ, const Vector3 &up)
nuclear@0: {
nuclear@0: 	Vector3 vk = normalize(targ - pos);
nuclear@0: 	Vector3 vj = normalize(up);
nuclear@0: 	Vector3 vi = normalize(cross(vk, vj));
nuclear@0: 	vj = cross(vi, vk);
nuclear@0: 
nuclear@0: 	Matrix4x4 m(
nuclear@0: 			vi.x, vi.y, vi.z, 0,
nuclear@0: 			vj.x, vj.y, vj.z, 0,
nuclear@0: 			-vk.x, -vk.y, -vk.z, 0,
nuclear@0: 			0, 0, 0, 1);
nuclear@0: 	translate(-pos.x, -pos.y, -pos.z);
nuclear@0: 	*this = *this * m;
nuclear@0: }