Experts Exchange - Time Tested Solutions

September 7, 2008 07:05pm pdt

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Time Tested OpenGL Game Programming Solutions: 76 - 86 of 86

texture-glreadpixels()

hi, i am using the glreadpixels() function to retrieve the texel information from the framebuffer. In my case, I am interested in learning the grayvalue of the colored jpeg being pasted as ...

Filling a Polygon

I'm drawing an oddly shaped polygon and I'm having problems filling in the inside. Basically, another program is sending me a 2d array of points (x and y values). I'm taking these points, ma...

texture conundrum (dynamic textures, orthographic mode, ...)

I'm trying to do some demo effects with dynamic textures. Only I'm really screwing up, somewhere. The code is nowhere near clean, but it's all in one little c file (god bless tetris clones, ...

How to compute "isovalue" in "marching cubes" algorithm?

Dear experts in experts-exchange, I am now try to doing an "marching cubes" program using Visual C++ 6.0 and OpenGL. To my dismay, there are several codes / algorithm on the internet that i...

urgent - rotate camera

I have a rotation matrix and the code I have works almost as I want it to but there is some little thing missing and I can't figure out what it is. here the relevant snippet from the code: =...

How to use the Z-Buffer Algorithm in OpenGL?

Hi there, I'm extremely new to OpenGL programming so hope that everyone can be patient with my questions. I'm actually trying to write codes for the hemicube algorithm to solve the radio...

glOrtho and SetViewPort

Hello, I want to draw and rotate Parallelopiped in 3D arround its central axis. Question is how to set Clipping Planes and appropriate view port to maximize its size on the screen. Thanks!

Export OpenGL scene to a file

Hello, I'm quite new to OpenGL, but I'd like to know how I would export the current OpenGL scene to a file that is a readable format for 3D Studio Max...

Converting object coordinates to world coordinates

Hi, If I have the local or object coordinates, and I can get the various opengl matrices (e.g. projection, modelview), how do I get the corresponding world coordinates? Thanks.

Marching cubes algorithm

The following code contains working implementation of marching cubes algorithm: http://www.astronomy.swin.edu.au/~pbourke/modelling/polygonise/marchingsource.cpp This is it's short descripti...

creating 3d aeroplane

can anyone show me how to create a 3d aeroplane using opengl ? i understand that we need to plot the vertices but i just don't get the concept of combining all parts of aeroplane...can somebod...