Hey guys, I'm developing something using pure GL here.
How to use perspective + ortho?
I'm wondering if my thought is correct, please, see:
- change to projection matrix mode
- push the projection matrix onto the stack
- reset the projection matrix
- set ortho parameters
- change to modelview matrix mode
- push the modelview matrix onto the stack
- reset the modelview matrix
- set the raster position
- render the things
- change to projection matrix mode
- pop the projection matrix from the stack
- change to modelview matrix mode
- pop the modelview matrix from the stack
...
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluOrtho2D(0f, 1024, 0f, 768);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glRasterPos3f(10f, 10f, 1f);
glutBitmapString(BITMAP_TIMES_ROMAN_24, "testing");
...
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
...
