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Fixed Mat4::look_at

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This commit is contained in:
Boden Garman 2013-12-07 14:36:11 +11:00
parent 8d4a06005c
commit 3c9a6a531d
1 changed files with 6 additions and 6 deletions
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12
src/cgmath/matrix.rs
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@ -226,13 +226,13 @@ impl<S: Primitive> Mat4<S> {
impl<S: Float> Mat4<S> {
pub fn look_at(eye: &Point3<S>, center: &Point3<S>, up: &Vec3<S>) -> Mat4<S> {
let f = center.sub_p(eye).normalize();
let s = f.cross(&up.normalize());
let u = s.cross(&f).normalize();
let s = f.cross(up).normalize();
let u = s.cross(&f);
Mat4::new(s.x.clone(), s.y.clone(), s.z.clone(), zero(),
u.x.clone(), u.y.clone(), u.z.clone(), zero(),
-f.x.clone(), -f.y.clone(), -f.z.clone(), zero(),
-eye.dot(&s), -eye.dot(&u), -eye.dot(&f), one())
Mat4::new(s.x.clone(), u.x.clone(), -f.x.clone(), zero(),
s.y.clone(), u.y.clone(), -f.y.clone(), zero(),
s.z.clone(), u.z.clone(), -f.z.clone(), zero(),
-eye.dot(&s), -eye.dot(&u), eye.dot(&f), one())
}
}