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remove a GLU call

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Glenn Maynard
2003-04-25 06:58:19 +00:00
parent ebe1b5c0c4
commit 7f8a351966
1 changed files with 13 additions and 1 deletions
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stepmania/src/RageDisplay.cpp
+13 -1
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@@ -670,6 +670,18 @@ void RageDisplay::LoadMenuPerspective(float fovDegrees)
} }
} }
/* Getting rid of GLU calls. We don't use them much, and it's just another
* library. */
static void rgluPerspective(GLfloat fovy, GLfloat aspect, GLfloat zNear, GLfloat zFar)
{
GLfloat ymax = zNear * tanf(fovy * PI / 360.0f);
GLfloat ymin = -ymax;
GLfloat xmin = ymin * aspect;
GLfloat xmax = ymax * aspect;
glFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
}
/* Switch from orthogonal to perspective view. /* Switch from orthogonal to perspective view.
* *
* Tricky: we want to maintain all of the zooms, rotations and translations * Tricky: we want to maintain all of the zooms, rotations and translations
@@ -703,7 +715,7 @@ void RageDisplay::EnterPerspective(float fov, bool preserve_loc, float near_clip
glPushMatrix(); glPushMatrix();
glLoadIdentity(); glLoadIdentity();
float aspect = SCREEN_WIDTH/(float)SCREEN_HEIGHT; float aspect = SCREEN_WIDTH/(float)SCREEN_HEIGHT;
gluPerspective(fov, aspect, near_clip, far_clip); rgluPerspective(fov, aspect, near_clip, far_clip);
/* Flip the Y coordinate, so positive numbers go down. */ /* Flip the Y coordinate, so positive numbers go down. */