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no need to specialize set_fovy

This commit is contained in:
Philippe Renon 2020-10-11 15:41:29 +02:00
parent 0634a0a74e
commit 900f466e43
1 changed files with 11 additions and 18 deletions
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29
src/geometry/perspective.rs
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@ -254,6 +254,15 @@ impl<S: System, N: RealField> Perspective3<S, N> {
);
self.matrix[(0, 0)] = self.matrix[(1, 1)] / aspect;
}
/// Updates this perspective with a new y field of view of the view frustum.
#[inline]
pub fn set_fovy(&mut self, fovy: N) {
let old_m22 = self.matrix[(1, 1)];
let f = N::one() / (fovy / crate::convert(2.0)).tan();
self.matrix[(1, 1)] = f;
self.matrix[(0, 0)] *= f / old_m22;
}
}
// OpenGL specialization
@ -284,13 +293,6 @@ impl<N: RealField> Perspective3<OpenGL, N> {
res
}
/// Updates this perspective with a new y field of view of the view frustum.
#[inline]
pub fn set_fovy(&mut self, fovy: N) {
let old_m22 = self.matrix[(1, 1)];
self.matrix[(1, 1)] = N::one() / (fovy / crate::convert(2.0)).tan();
self.matrix[(0, 0)] = self.matrix[(0, 0)] * (self.matrix[(1, 1)] / old_m22);
}
/// Updates this perspective matrix with a new near plane offset of the view frustum.
/// Implementation note: set_znear() must be specialized because it calls other specialized functions.
@ -343,15 +345,6 @@ impl<N: RealField> Perspective3<Vulkan, N> {
res
}
/// Updates this perspective with a new y field of view of the view frustum.
#[inline]
pub fn set_fovy(&mut self, fovy: N) {
let old_m22 = self.matrix[(1, 1)];
let f = N::one() / (fovy / crate::convert(2.0)).tan();
self.matrix[(1, 1)] = -f;
self.matrix[(0, 0)] *= f / old_m22;
}
/// Updates this perspective matrix with a new near plane offset of the view frustum.
/// Implementation note: set_znear() must be specialized because it calls other specialized functions.
#[inline]
@ -371,8 +364,8 @@ impl<N: RealField> Perspective3<Vulkan, N> {
/// Updates this perspective matrix with new near and far plane offsets of the view frustum.
#[inline]
pub fn set_znear_and_zfar(&mut self, znear: N, zfar: N) {
self.matrix[(2, 2)] = -zfar / (zfar - znear);
self.matrix[(2, 3)] = -(zfar * znear) / (zfar - znear);
self.matrix[(2, 2)] = zfar / (znear - zfar);
self.matrix[(2, 3)] = (zfar * znear) / (znear - zfar);
}
}