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Type: Posts; User: Lee_Jennifer_82

1. ## Thread: Different functions from a triangle

by Lee_Jennifer_82
Replies
2
Views
778

### Different functions from a triangle

I have a triangle with base '2b' and height 'h' as shown in the attached figure (a). I would like to construct two different functions as shown in (b) and (c) keeping the height and base the same....
2. ## Thread: Order of x, y, z rotation angles in OpenGL

by Lee_Jennifer_82
Replies
2
Views
745

### Order of x, y, z rotation angles in OpenGL

I have extracted the three rotation angles from a rotation matrix. Now if an object is multiplied by the rotation matrix or the rotation angles, both should give the same result. I followed the...
3. ## Thread: Need some clarification on transformation matrices

by Lee_Jennifer_82
Replies
13
Views
1,676

### Sorry for the confusion. Let me try to explain...

Sorry for the confusion. Let me try to explain again. Suppose I have a rotation matrix in coordinate system (a). I would like to see it in coordinate system (b) but with same orientation as shown...
4. ## Thread: Need some clarification on transformation matrices

by Lee_Jennifer_82
Replies
13
Views
1,676

### Hi Dark Photon, thank you very much again for...

Hi Dark Photon, thank you very much again for commenting on my post. I know as a newbie, my question my be too simple to ask. We don't need to consider opencv. Let us consider the two coordinate...
5. ## Thread: Need some clarification on transformation matrices

by Lee_Jennifer_82
Replies
13
Views
1,676

### Thanks for the provided link. I am clear now...

Thanks for the provided link. I am clear now about the coordinate systems in opencv and opengl. But the way I could make it work right is as follows:

1)First, post multiply the above mentioned...
6. ## Thread: Need some clarification on transformation matrices

by Lee_Jennifer_82
Replies
13
Views
1,676

### So sorry for my mistake. The matrix should be as...

So sorry for my mistake. The matrix should be as follows:

|1 0 0 0|
|0 -1 0 0|
|0 0 -1 0|
|0 0 0 1|
7. ## Thread: Need some clarification on transformation matrices

by Lee_Jennifer_82
Replies
13
Views
1,676

### Thank you all for the reply. Have any one have...

Thank you all for the reply. Have any one have done matrix transformation from OpenCV to OpenGL? I am doing by multiplying the opencv matrix by the following:

|1 0 0 0|
|0 1 0 0|
|0 0 1 0|
|0 0...
8. ## Thread: Need some clarification on transformation matrices

by Lee_Jennifer_82
Replies
13
Views
1,676

### Need some clarification on transformation matrices

Hello, I need some clarification on transformation matrices. I have given x ( x1, x2, x3), y (y1, y2, y3) and z (z1, z2, z3) axis basis vectors. Does the required rotation transformation matrix look...

by Lee_Jennifer_82
Replies
2
Views
699

### reading vertices from a file

I have to extract vertices frm a file written as follows:

{(1.20, 3.0, -3.0); (1.10, -2.0, 4.0); (-5.0, 8.0, 7.0) ...........................................................(-4.0, 7.0,-3.0)}

I...
10. ## Thread: Texture mapping question

by Lee_Jennifer_82
Replies
6
Views
1,634

### Actually I was thinking whether the texture image...

Actually I was thinking whether the texture image can be mapped in a different way. The image can be divided into a number of contours as shown in the figure (attached). Then grdually map it (from...
11. ## Thread: Texture mapping question

by Lee_Jennifer_82
Replies
6
Views
1,634

### I have never used VBO. I just use simple texture...

I have never used VBO. I just use simple texture mapping. Do I need to use VBO in this case?
12. ## Thread: Texture mapping question

by Lee_Jennifer_82
Replies
6
Views
1,634

### I know that texture values range from (0.0, 0.0)...

I know that texture values range from (0.0, 0.0) to (1.0, 1.0). How can I establish correspondence between u,v texture values and vertices of my unstructured data. Please help me clarify a bit. I am...
13. ## Thread: Texture mapping question

by Lee_Jennifer_82
Replies
6
Views
1,634

### Texture mapping question

At this moment I just can do some simple texture mapping. I have one tubular model of a certain depth. I would like to paste a 2D image around the inside wall of the cylinder. The result needs to...
14. ## Thread: Some problem with deleting tringles using vector iterator

by Lee_Jennifer_82
Replies
4
Views
1,504

### the following works: for(VerticeSet::iterator...

the following works:

for(VerticeSet::iterator cur_a = current_start.begin(); cur_a != current_start.end(); cur_a++){

for (int i = 0; i < tempContainerOne->size();){
Triangle...
15. ## Thread: Some problem with deleting tringles using vector iterator

by Lee_Jennifer_82
Replies
4
Views
1,504

### If I write like the following it still shows...

If I write like the following it still shows error, Am I using erase function properly:

for(int i = 0; i < tempContainerOne->size(); i++){

Triangle& tri_2 = (*tempContainerOne)[i];
...
16. ## Thread: Some problem with deleting tringles using vector iterator

by Lee_Jennifer_82
Replies
4
Views
1,504

### Some problem with deleting tringles using vector iterator

I wrote the following code. I want to delete some triangle from tempContainerOne which is described as a vector of triangles.

I can compilewithout error, but when run the program, it fails. WOuld...
17. ## Thread: Need some help

by Lee_Jennifer_82
Replies
7
Views
2,346

### Thanks for the information. Actually we are...

Thanks for the information. Actually we are trying to display one vase with artistic design outside as well as its inside wall. none of us from science background. I have started reading the red...
18. ## Thread: Need some help

by Lee_Jennifer_82
Replies
7
Views
2,346

### Need some help

I am a beginner in OpenGL. I want to create two panels in a window. Each will have different view for a particular object. Could any one suggest me the foolowing:

1.How to create two panels in a...
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