i’m using opengl 4 on windows 8.
When i call gluPerspective, the focus or center of the view seems to be in the corner rather than the center. this is depicted in the following link to an image:
(add http in front and replace all * with . to get it working)
On the left side is how a wireframe cube would look if i used gluPerspective. The view is centered on the lower left corner.
On the right side is how i want the cube to look. The view is centered on the center, and all edges of the cube are visible.
how can i do this?
my post was denied for some reason involving urls and forbidden words
instead, here is a link to my code and explanation. link was modified in the same way as the image was as descriped in the first post. thank you
gluPerspective in GL_MODELVIEW
gluPerspective should not be used with the view-model matrix. It defines the projection. The view-model matrix defines the position of the cameras and objects in the world. You uses gluLookAt to position the camera.
You might want to look at OpenGL Transformation
i understand. however, i cannot get gluPerspective to work in GL_PROJECTION. (the resulting display is the same as if i left the gluPerspective line out completely. do you have any idea why this might be the case?
That doesn’t make any sense but have a read of http://www.opengl.org/archives/resources/faq/technical/viewing.htm it might help solve your problem
Also make sure window.clear and world.draw aren’t changing anything
i’ve got it working with this now:
glShadeModel( GL_FLAT )
gluPerspective(120., window.width / float(window.height), .1, 1000.)