Hi Alfonse, sorry about not being very clear, By "equivalent", I mean this:

Lets say I have model with camera set for parallel projection. Now I want to have perspective projection of the same...

If I know field of view angle and current view volume co-ordinates defined by left_perspective, right_perspective, top_perspective, bottom_perspective, zNear, zFar. Then is it possible to some how...

I came across this issue when I was trying to triangulate Text entities using GLUtesselator. However, it can occur during triangulation of any polygon using GLUtesselator. The problem is that...

yup....it worked for me...thanks a lot :)

prasad

Is is possible to draw some objects in perspective mode and some objects with orthographic mde in the same opengl window?

-Prasad

Hi,

I am rendering a scene with option to use Orthographic projection as well as perspective projection.

I am able to draw full screen background image using orthographic projection, but I...

Finally, after a lot of frustration I figured it out!

I am using Qt to develop my UI. I have to explicitly turn on stencil buffer for my QGLWidget for code to run correctly on Vista. How it was...

Hi guys,

I have implemented Robust Stencil Shadow paper posted on NVIDIA's website.

http://developer.nvidia.com/object/robust_shadow_volumes.html

My code works perfectly fine when I run it...

Hi,

I made the changes code to check supported extensions dynamically and now it works perfectly fine.

Prasad

awesome....that will help a lot. That is why my code was working perfectly fine on machine on which i was compiling it but breaking on other machines. The other machine on which I was running my code...

I as wondering if a particular OpenGL extension is defined (in glext.h) then does that mean it will be supported by graphics hardware?

What I mean is can I rely on following piece of code to see...

Actually self shadowing is one of the most important aspect of it :p

I am using shadow volume technique to cast shadows from polygons. Now I also want line entities in my model to cast shadows....

cool..thanx ZbuffeR!! Do have any example code or can u please direct me to more elaborate articles on it?

Best,
-Prasad

Hi,

Is there anyway to cast shadows from wireframe entities (such as glutWireSphere or simply GL_LINES )on a non planer objects?

I am sure there must few smart guys out there who have already...