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Type: Posts; User: PeterK

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1. ## Thread: Creating surfaces from medical data???

by PeterK
Replies
3
Views
220

### Re: Creating surfaces from medical data???

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...

by PeterK
Replies
28
Views
2,037

Hear! Hear!
3. ## Thread: How would you emulate OS X 's AQUA ?

by PeterK
Replies
5
Views
151

### Re: How would you emulate OS X 's AQUA ?

http://www.macdesignonline.com/tutorials/spring/6_0_cover.html
4. ## Thread: output from gluTess* to indexed vertex array?

by PeterK
Replies
0
Views
97

### output from gluTess* to indexed vertex array?

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

(just hoping)
5. ## Thread: CSG

by PeterK
Replies
2
Views
182

### Re: CSG

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.
6. ## Thread: Seriously, is it worth it?

by PeterK
Replies
95
Views
15,718

### Re: Seriously, is it worth it?

The best things in life are undeserved.
7. ## Thread: Using multiple code

by PeterK
Replies
14
Views
974

### Re: Using multiple code

Everyone has to start somewhere.

by PeterK
Replies
14
Views
1,040

### Re: Geforce3 question - Please answer!

Will the next Quadro support 3-D hardware accelerated textures? I have a Quadro I and I would certainly upgrade if it did.
9. ## Thread: Cutting polygons

by PeterK
Replies
7
Views
236

### Re: Cutting polygons

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...
10. ## Thread: NVIDIA GeForce 2 graphics corruption using OpenGL

by PeterK
Replies
10
Views
627

### Re: NVIDIA GeForce 2 graphics corruption using OpenGL

This is a guess (that might narrow down the problem): try disabling blending and see what happens.
11. ## Thread: 3D graphs

by PeterK
Replies
6
Views
180

### Re: 3D graphs

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.
...
12. ## Thread: 3D graphs

by PeterK
Replies
6
Views
180

### Re: 3D graphs

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:...
13. ## Thread: 3D graphs

by PeterK
Replies
6
Views
180

### Re: 3D graphs

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...
14. ## Thread: 3D graphs

by PeterK
Replies
6
Views
180

### 3D graphs

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...
15. ## Thread: Anyone wanna test my 3d engine?

by PeterK
Replies
39
Views
3,948

### Re: Anyone wanna test my 3d engine?

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).]
16. ## Thread: Global display lists

by PeterK
Replies
3
Views
156

### Re: Global display lists

I'm still working on it. Any ideas on how to do it?
17. ## Thread: Global display lists

by PeterK
Replies
3
Views
156

### Re: Global display lists

Thanks. I'll give it a try.
18. ## Thread: Global display lists

by PeterK
Replies
3
Views
156

### Global display lists

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.
...
19. ## Thread: glNormalPointer with glDrawElements?

by PeterK
Replies
1
Views
315

### Re: glNormalPointer with glDrawElements?

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

Averaging normals is necessary in this case, eh?
20. ## Thread: glNormalPointer with glDrawElements?

by PeterK
Replies
1
Views
315

### glNormalPointer with glDrawElements?

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...
21. ## Thread: Generating 2D textures from a 3D matrix (against the grain)

by PeterK
Replies
0
Views
143

### Generating 2D textures from a 3D matrix (against the grain)

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:...
22. ## Thread: 3D Texture Mapping & Elsa Gloria II

by PeterK
Replies
4
Views
188

### Re: 3D Texture Mapping & Elsa Gloria II

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...
23. ## Thread: Need some help

by PeterK
Replies
1
Views
228

### Re: Need some help

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

[This message has been edited by PeterK (edited 09-02-2000).]
24. ## Thread: Using OpenGL v1.2 ICD

by PeterK
Replies
13
Views
681

### Re: Using OpenGL v1.2 ICD

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)?
25. ## Thread: Using OpenGL v1.2 ICD

by PeterK
Replies
13
Views
681

### Re: Using OpenGL v1.2 ICD

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:
...
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