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Yesterday, 08:19 PM

Quantumcat started a thread OpenGL rotation function? in OpenGL coding: beginners

I have some objects with vectors of positions. I have been successful getting them to sit on the floor by calculating their centre, and translating...

3 replies | 42 view(s)

Yesterday, 10:38 AM

raluk22 started a thread Working with glFrustum and gluLookAt in OpenGL coding: beginners

Hello everybody! I just started working with OpenGL and I have this problem with glFrustum and gluLookAt. I have to obtain the first image but the...

2 replies | 77 view(s)

Yesterday, 04:48 AM

cordura334 started a thread Falling objects game in OpenGL coding: beginners

hello everyone i am making a falling objects game for my semester project and i am facing a problem with the code. i can't create the objects...

1 replies | 117 view(s)

Yesterday, 08:20 AM

kaberdock started a thread DepthMap with glreadPixels in OpenGL coding: beginners

Hello everyone, I'm trying to get a depthmap of the scene using glreadpixels, mi command is it: glReadPixels(0, 0, img.cols, img.rows,...

2 replies | 70 view(s)

Yesterday, 10:39 PM

bug343 started a thread problem with glBufferData in OpenGL coding: beginners

I am writing a hello world that draws a simple triangle and trying out VAO. GLuint vbo; GLuint vao; .....

1 replies | 24 view(s)

Yesterday, 07:02 PM

fakhir started a thread GL ES: Fragment shader optimization in OpenGL Shading Language

Summary: I get FPS slowdown as soon as I try to tint the sprites (i.e: multiply texture with color in the fragment shader) Details: Hardware:...

0 replies | 55 view(s)

Yesterday, 10:49 PM

bug343 started a thread OpenGL red book 4.3 or SuperBIble 4.3? in OpenGL coding: beginners

Which book do you recommend for a beginner? I heard from another friend who is a beginner that the red book 4.3 does not do a fine job of explaining...

0 replies | 27 view(s)

Today, 03:19 AM

HasasnChr started a thread Need Help In Modifiying My Code OPENGL in OpenGL coding: beginners

i have this code of a colored cube in openGL however i want to make it a 3d cube and i want to rotate it , can anyone help me with coding ( AS IN...

0 replies | 0 view(s)

Today, 03:10 AM

thomas.d replied to a thread Work groups with priorities in Suggestions for the next release of OpenGL

An alternative (probably easier to implement -- but not what I would prefer, since it would require shared contexts, extra synchronization, more...

1 replies | 104 view(s)

Today, 03:03 AM

viveksrivastava replied to a thread 2D rotation in OpenGL coding: beginners

void make_scene() { init(); glRotatef(scene_zangel,0.0,0.0,1.0); glRotatef(scene_xangel,1.0,0.0,0.0);...

2 replies | 157 view(s)

Today, 02:36 AM

viveksrivastava replied to a thread OpenGL rotation function? in OpenGL coding: beginners

void rotation_inbuilt() { printf("My rotation value of thetax thetay thetaz:- %f\t,%f\t,%f\t",theta_x,theta_y,theta_z); ...

3 replies | 42 view(s)

Today, 02:28 AM

viveksrivastava replied to a thread orientation and rotation in OpenGL coding: beginners

Thanks :o , "You can represent rotations and orientations with the same mathematical constructs (ie: matrices and quaternions)" Tell me basic...

3 replies | 101 view(s)

Today, 01:31 AM

tonyo_au replied to a thread Nvidia 319/320 drivers and shared layout UBOs in OpenGL drivers

Why do you need to query locations in a std140 buffer. They are at known offsets from the start of the buffer or am I misunderstanding something.

3 replies | 110 view(s)

Today, 01:22 AM

tonyo_au replied to a thread Issue compiling OpenGL program that uses GLEW in OpenGL under Windows

You have not included the glew library in your link

1 replies | 91 view(s)

Today, 01:19 AM

tonyo_au replied to a thread OpenGL rotation function? in OpenGL coding: beginners

rotated_vector = rotation_matrix *original_vector Use this for glm with opengl

3 replies | 42 view(s)

Today, 01:16 AM

tonyo_au replied to a thread problem with glBufferData in OpenGL coding: beginners

check for an opengl error prior to this code with glGetError();

1 replies | 24 view(s)

Today, 01:08 AM

tonyo_au replied to a thread Contouring in OpenGL in OpenGL coding: beginners

I brute force mine. Look at the triangle, see what contours cross it, save them - now I have poly lines and I can label along the length of the poly...

5 replies | 250 view(s)

Yesterday, 11:58 PM

bug343 replied to a thread OpenGL rotation function? in OpenGL coding: beginners

The GLMath (glm) libraries have functions to generate a rotation transformation matrix. These functions have been written by many people for...

3 replies | 42 view(s)

Yesterday, 04:37 PM

The Little Body replied to a thread Smoothing the dges of a polygon in Math and Algorithms

Something like this http://www.opengl.org/discussion_boards/showthread.php/131788-How-to-draw-a-bezier-curve-through-its-control-points ?

1 replies | 138 view(s)

Yesterday, 11:13 AM

raluk22 replied to a thread Working with glFrustum and gluLookAt in OpenGL coding: beginners

Thanks a lot :) so this is the whole thing: The projection() function is where I make the transformation, in Display() case 'p' is where I call...

2 replies | 77 view(s)

Yesterday, 10:59 AM

uwi2k2 replied to a thread Working with glFrustum and gluLookAt in OpenGL coding: beginners

hi, if the rest of the code is no big secret pls post it. so i can copy it - modefy it - and post it back .. thats mutch easyer than anything...

2 replies | 77 view(s)

Yesterday, 10:54 AM

uwi2k2 replied to a thread Falling objects game in OpenGL coding: beginners

hi, without some code of yours we can´t help you. anyway you need a GameLoop that is running over and over again. cu uwi

1 replies | 117 view(s)

Yesterday, 08:32 AM

kaberdock replied to a thread DepthMap with glreadPixels in OpenGL coding: beginners

I found the problem, is the data type of the mat that I was saving the image. Sorry for the post

2 replies | 70 view(s)

Yesterday, 08:22 AM

kaberdock replied to a thread DepthMap with glreadPixels in OpenGL coding: beginners

this is the image: imageshack.us/a/img267/2125/depthmap.png

2 replies | 70 view(s)

Yesterday, 06:01 AM

thokra replied to a thread write data to arbitrary position in OpenGL Shading Language

Have fun with interreflections. ;)

3 replies | 187 view(s)

Yesterday, 05:22 AM

beorht replied to a thread write data to arbitrary position in OpenGL Shading Language

Thanks for your quick and detailed reply, i will take a look at shader image load/store and opencl you mentioned My major concern is portability and...

3 replies | 187 view(s)

Yesterday, 04:37 AM

thokra replied to a thread Quality of Implementation: Debug shader variable locations in OpenGL drivers

The thing is, ouputting messages is costly as hell. :) And being able to have the GL report stuff on its own without querying with glGetError() is...

20 replies | 599 view(s)

Yesterday, 04:01 AM

thokra replied to a thread write data to arbitrary position in OpenGL Shading Language

Well, shader image load/store lets you read from and write to arbitrary positions of an image - however, you'll need not only GL4 capable hardware,...

3 replies | 187 view(s)

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