As a beginner, you may want to look into using the visualization tool kit ( http://public.kitware.com/VTK/index.php ). It is free.

It contains various algorithms for reconstructing surfaces...

Hear! Hear!

http://www.macdesignonline.com/tutorials/spring/6_0_cover.html

Is there a way to have OpenGL triangulate (using gluTessVertex et al.) contours and stuff the output into an indexed vertex array?

(just hoping)

Here is a link to a book that has source code for an OpenGL CSG implementation for various operating systems:

Open Geometry: OpenGL + Advanced Geometry

The code is documented rather sparsely.

The best things in life are undeserved.

Everyone has to start somewhere.

Will the next Quadro support 3-D hardware accelerated textures? I have a Quadro I and I would certainly upgrade if it did.

You might consider projecting edge vectors of one polygon onto vectors that are perpendicular to the plane that both polygons are in and the edges of the other polygon.

It might be messy but you...

This is a guess (that might narrow down the problem): try disabling blending and see what happens.

Thanks billy! You were right about the normals alternating. My code has a logic error. For triangle strips, odd numbered normals calculations (using my method of calculation) should be inverted.
...

Billy: I suspect my normals are alternating (towards the user and away from the user). I'll check them! I just don't see how this is possible from my calculation of the normals.

Tim Stirling:...

Thanks for your post.

I'm especially interested in your angle dependent normal calculation. I'll give it a try.

I can't understand why my version has alternating bands of light and dark. Here...

Is there an OpenGL library (or tutorial or code) for scientific visualization?

I'm trying to make a 3D graph out of a single indexed triangle strip but its surface is "streaky".

Here is...

I had a similar effect with the walls (but I'm using an older card).

Elsa Gloria II (Quadro)
PIII 833
1024MB

[This message has been edited by PeterK (edited 01-11-2001).]

I'm still working on it. Any ideas on how to do it?

Thanks. I'll give it a try.

I am writing an MDI application in Win32 and I have a rendering context and a windows device context embedded in each view window.

When a view window dies, its rendering context dies with it.
...

I've just seen the post here on normal arrays.

Averaging normals is necessary in this case, eh?

I am trying to use glNormalPointer to assign normals to each triangle in a triangle strip that is drawn using glDrawElements.

Is it possible to use glNormalPointer when the vertices are indexed...

I have a 3D matrix of bytes, (ImageSeries[512][512][70], where each 512x512 "slice" of data ImageSeries[x][y] to ImageSeries[x+1][y]),is an image that I use to create a texture map.

My question:...

I am using an Elsa Gloria II on NT. I don't think that it accelerates 3D texture maps (although I don't know for sure because I use OpenGL v.1.1).

I was hoping to use 3D textures but was told...

Rednite asked a similar question here and frogger gave him this link.

[This message has been edited by PeterK (edited 09-02-2000).]

Does that mean that even if Microsoft releases an opengl32.dll for OpenGL 1.2 that use of 3D textures will be painfully slow (for all cards but the Radeon)?

I hope to use 3D texture mapping but I can't find an extension on my video card that will support this.

Am I out of luck? How can I use 3D texture maps?

Extensions on my video card:
...