diff options
Diffstat (limited to 'demos/boxes/glbuffers.cpp')
| -rw-r--r-- | demos/boxes/glbuffers.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/demos/boxes/glbuffers.cpp b/demos/boxes/glbuffers.cpp index 694d05b..84ab26c 100644 --- a/demos/boxes/glbuffers.cpp +++ b/demos/boxes/glbuffers.cpp @@ -42,6 +42,16 @@ #include "glbuffers.h" #include <QtGui/qmatrix4x4.h> + +void qgluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar) +{ + const GLdouble ymax = zNear * tan(fovy * M_PI / 360.0); + const GLdouble ymin = -ymax; + const GLdouble xmin = ymin * aspect; + const GLdouble xmax = ymax * aspect; + glFrustum(xmin, xmax, ymin, ymax, zNear, zFar); +} + //============================================================================// // GLTexture // //============================================================================// |