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Support far clip distance of infinity

This commit is contained in:
rdb 2015-06-06 16:24:59 +02:00
parent 4a88d71ff6
commit cfcf91c1c1
1 changed files with 11 additions and 5 deletions
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16
panda/src/gobj/perspectiveLens.cxx
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@ -82,12 +82,18 @@ do_compute_projection_mat(Lens::CData *lens_cdata) {
PN_stdfloat fl = do_get_focal_length(lens_cdata);
PN_stdfloat fFar = do_get_far(lens_cdata);
PN_stdfloat fNear = do_get_near(lens_cdata);
PN_stdfloat far_minus_near = fFar-fNear;
PN_stdfloat a = (fFar + fNear);
PN_stdfloat b = -2.0f * fFar * fNear;
PN_stdfloat a, b;
a /= far_minus_near;
b /= far_minus_near;
if (cinf(fFar)) {
a = 1;
b = -2 * fNear;
} else {
PN_stdfloat far_minus_near = fFar-fNear;
a = (fFar + fNear);
b = -2 * fFar * fNear;
a /= far_minus_near;
b /= far_minus_near;
}
LMatrix4 canonical;
switch (cs) {