Hi
My program uses glFrustum to set prespective projection and I want instead a simple parallel projection.
my code is:
void reshape( int w, int h )
{
glViewport( 0, 0, (GLsizei)w, (GLsizei)h );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glFrustum( -.4, .4, -.3, .3, 1., 1300. );
glMatrixMode( GL_MODELVIEW );
glutPostRedisplay();
}
void draw( )
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glColor3f( 1., 0., 0. );
glLoadIdentity();
gluLookAt( 350., 250., 250., 0., 0., 0., 0., 1., 0. );
glDisable( GL_LIGHTING );
drawAxis();
glEnable( GL_LIGHTING );
glColor3f( 1., 1., 0. );
// some more code here for drawing meshes
// vertices lie somewhere between -250 and 250
when I try to use
glOrtho( -.4, .4, -.3, .3, 1., 1300. )
// OR
glOrtho( -1., 1., -1., 1., 1., 1300. )
instead of the glFrustum statement, I see no output what so ever
any hints on the issue
thanks in advance.
