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Type: Posts; User: lobbel

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1. Thread: intersection test, ray obb inverse model matrix

by lobbel
Replies
5
Views
3,174

Hello, so far I understood. Thank you to both of...

Hello,
so far I understood. Thank you to both of you.

regards,
lobbel
2. Thread: intersection test, ray obb inverse model matrix

by lobbel
Replies
5
Views
3,174

Hello, and thanks for the fast answer. But I...

Hello,
and thanks for the fast answer. But I have one more question according to your point, that the ray direction is a position vector.
The vector that points to the ray's origin is a position...
3. Thread: intersection test, ray obb inverse model matrix

by lobbel
Replies
5
Views
3,174

intersection test, ray obb inverse model matrix

Hello,
let's say I've got an object bounding box and a ray. And I want to test wether the ray
intersects the box or not. So I take the inverse matrix of the obb and multiply the
ray's position and...
4. Thread: GLM lib differences in matrix to quaternion ?

by lobbel
Replies
3
Views
2,442

Re: GLM lib differences in matrix to quaternion ?

Hello,
let's see this short snippet

glm::mat4 mat(1.0f, 2.0f, 3.0f, 4.0f,
5.0f, 6.0f, 7.0f, 8.0f,
9.0f, 10.0f, 11.0f, 12.0f,
13.0f, 14.0f, 15.0f,...
5. Thread: GLM lib differences in matrix to quaternion ?

by lobbel
Replies
3
Views
2,442

GLM lib differences in matrix to quaternion ?

Hello,
I guess a lot of you people know about the awesome GLM math library. I've a question about the matrix to quaternion conversion. I tried out several "tutorials" and code snippets from the net...
6. Thread: textures with pbo's

by lobbel
Replies
5
Views
1,282

Re: textures with pbo's

Hello,
thanks for your answer, that makes sense.

regards,
lobbel
7. Thread: textures with pbo's

by lobbel
Replies
5
Views
1,282

Re: textures with pbo's

Yes,
a buffer is genereated whenever e new textures has been created.
That's why I am asking wether this is a good idea or not.
As far as I know there is a lot of overhead with respect to buffer...
8. Thread: textures with pbo's

by lobbel
Replies
5
Views
1,282

textures with pbo's

Hi there,
I have a question about the use of PBOs with textures. I have seen in an open source engine that they use a PBO for each texture. That means operations like update will be performed by...
9. Thread: GLM library, unresolved symbol

by lobbel
Replies
12
Views
3,416

Re: GLM library, unresolved symbol

Hello,
I found "the problem". It is comparison.hpp and comparison.inl.
There you declare the comparison operator for your datatypes

//! Define != operator for vectors
//! From...
10. Thread: GLM library, unresolved symbol

by lobbel
Replies
12
Views
3,416

Re: GLM library, unresolved symbol

Hi,
I was talking about version 0.9.0.2 and GLM_GTX_int_10_10_10_2.

I have absolutely no clue why I get this error when including the
ext.hpp.

1>e:\Cpp\OglForum\Debug\OglForum.exe : fatal...
11. Thread: GLM library, unresolved symbol

by lobbel
Replies
12
Views
3,416

Re: GLM library, unresolved symbol

Yes, I have. But I also have this problem
with my visual studio 2010.

Using a const_iterator solves the problem, but this one can't be used for deleting the mapped entry.

Btw: I'm using GLM...
12. Thread: GLM library, unresolved symbol

by lobbel
Replies
12
Views
3,416

Re: GLM library, unresolved symbol

Hello,
I just tried it with the removed stdafx.h. It's the same
problem as before. But when I remove the glm\ext.hpp it works.

This works...

#include <map>
#include <utility>
#include...
13. Thread: GLM library, unresolved symbol

by lobbel
Replies
12
Views
3,416

Re: GLM library, unresolved symbol

Hello,

I made a test project with visual studio 2005 and I can reproduce the error.

here is the code

// OglForum.cpp : Defines the entry point for the console application.
//
14. Thread: GLM library, unresolved symbol

by lobbel
Replies
12
Views
3,416

GLM library, unresolved symbol

Hello,
I use the GLM math library in my opengl applications.
When I store an Object into a stl::map that has members
of types from GLM like glm::vec3 then I get an error for
an unresolved...
15. Thread: using opengl 3.x stuff in opengl 2.1 ??

by lobbel
Replies
2
Views
1,063

Re: using opengl 3.x stuff in opengl 2.1 ??

Thank you for this extensive explanation.
So I better keep focus on the newer versions.
Actually I wanted to mix the good things of both versions.
Like outline fonts. It's more difficult to create...
16. Thread: using opengl 3.x stuff in opengl 2.1 ??

by lobbel
Replies
2
Views
1,063

using opengl 3.x stuff in opengl 2.1 ??

Hello,
currently I'm working with OpenGL 3.3 and I was wondering If can use new features from version 3.3 in OpenGL 2.1 ?

As you know, you can use vertex attributes and declare them like...
17. Thread: the right way to share contexts ?

by lobbel
Replies
2
Views
869

the right way to share contexts ?

Hello,
how do I share contexts of different threads correctly ?
I create a main render context in the main thread.
Where do I have to create the second thread? The second thread
does so loading...
18. Thread: opengl 3.x shader only drawing ?

by lobbel
Replies
1
Views
1,505

opengl 3.x shader only drawing ?

Hello,
I created a VBO and a VAO and therefor defined the vertex attributes and also in my shader. Binding the shader and drawing the vbo works. But with out shader it doesnt work, well it draws...
19. Thread: enormously z-fighting

by lobbel
Replies
2
Views
2,341

Re: enormously z-fighting

Thanks for the fast answer.

I need the colors and the gradient for volume rendering. The color coded bounding geometry describe entrypositions for raycasting. And when moving the camera inside a...
20. Thread: enormously z-fighting

by lobbel
Replies
2
Views
2,341

enormously z-fighting

Hi,
there is a big problem with z fighting. A picture is worth a thousand words, so here it comes respectivly they come.

http://img820.imageshack.us/i/zfightcr.jpg/ ...
21. Thread: blit fbo that has multiple textures bound

by lobbel
Replies
0
Views
625

blit fbo that has multiple textures bound

Hello,

with glBlitFramebuffer it's possible to copy the content from one buffer to another buffer. The short description and code at
opengl.org about that features doesnt mention how to handle...
22. Thread: vbo,ibo + Normals

by lobbel
Replies
5
Views
1,886

Re: vbo,ibo + Normals

Thanks Pierre,
I think you are talking about instancing, right? Also considered about this.

regards,
lobbel
23. Thread: vbo,ibo + Normals

by lobbel
Replies
5
Views
1,886

Re: vbo,ibo + Normals

Hi,
tanks for the fast answer.
regards,
lobbel
24. Thread: vbo,ibo + Normals

by lobbel
Replies
5
Views
1,886

vbo,ibo + Normals

Hello,

drawing a Cube with vbo is not difficult. I define 8 vertices and
then create some indices to draw triangles with that given 8 vertices. But how to handle the normals ? When I wanted to...
25. Thread: ray-aabb intersection

by lobbel
Replies
0
Views
1,632

ray-aabb intersection

Hi there,
there is a question again to volume rendering. I have an
octree encoded in a 3d texture but only the deepest level.
In my case, 32x32x32. Furthermore, there is a min max texture.
The...
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