[pygame] Re: (pyopengl) GLSL fragment shader with arrays uniform cause sporadic screen blinking

On 12 фев, 00:43, Devon Scott-Tunkin wrote: > You may want to check > outhttp://www.opengl.org/wiki/GLSL_Uniform#Implementation_limits. You can > check the uniform limits of your video card with > glGetIntegerv(GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, yourReturnVar) Thanks for reference! Good point wh

[pygame] Re: (pyopengl) GLSL fragment shader with arrays uniform cause sporadic screen blinking

Shader now is more compact. The program below is working fine with radeon 5550 The program generate different GLSL Shockwave effect by randomizing shader inputs. http://bpaste.net/show/13632/ All thanks for support!

[pygame] Re: (pyopengl) GLSL fragment shader with arrays uniform cause sporadic screen blinking

THE PROBLEM IS SOLVED by decreasing array elements at stage of declaration in shader from 100 down to 20. > On Feb 12, 1:09 am, Devon Scott-Tunkin wrote: > Thehttp://bpaste.net/show/13617/is not the same because the glsl compiler > will usually compile out (make inactive) all of your uniforms si

[pygame] Re: (pyopengl) GLSL fragment shader with arrays uniform cause sporadic screen blinking

> > claudio > > after resampling to power of two (512 x 512) it passes that point, but seems > that this test machine (vga = intel 945g ) don't supports the funcionality: Hi Claudio. You are right it requires OpenGl 2.0 HW support, sorry that i forgot to mention this in the fist topic. Probably it

[pygame] Re: (pyopengl) GLSL fragment shader with arrays uniform cause sporadic screen blinking

On Feb 11, 10:37 pm, amdlintuxo wrote: > Hi all. > > The strange is: > The problem occurs with shaderhttp://bpaste.net/show/13616/ > even if i pass empty arrays into it (imax = 0), so actually shader > should do any distortion work. Sorry, misstype = The strange is: = The p

[pygame] (pyopengl) GLSL fragment shader with arrays uniform cause sporadic screen blinking

Hi all. Strange sporadic screen blinking when using array uniform variables in fragment shader. Unfortunately i have only one HW config to test this(maybe the problem is in my HW) The strange is: The problem occurs with shader http://bpaste.net/show/13616/ even if i pass empty arrays into it (ima

[pygame] Re: 2D Shockwave Post Processing Filter (GLSL)

Hi all. Seems to be working fine now! My two mistakes were: 1) in shader the "time" variable must get game time(loop time), and i was sending the constant value which is wrong. 2) in shader the "center" variable must get the texture coordinate [0,1], and i was sending the pixels sizes. Working dirt

[pygame] 2D Shockwave Post Processing Filter (GLSL)

Hi all. I am trying to implement the 2D Shockwave Post Processing Filter (GLSL) using pyopengl. The effect(shader) are available here http://www.geeks3d.com/20091116/shader-library-2d-shockwave-post-processing-filter-glsl/ As far as i understood this shader is kind of post-process, so in order to

[pygame] Re: [pyopengl] glActiveTexture(GL_TEXTURE1) cause failure in my code, can't get the reason why

On Feb 5, 7:39 pm, Ian Mallett wrote: > Hi, > > Have a look at the output; the minus one indicates an invalid index, invalid > because the variable it points to does not exist in the shader.  Although it > doesn't on my machine, perhaps trying to pass the uniform to it causes some > error. > > The

[pygame] Re: [pyopengl] glActiveTexture(GL_TEXTURE1) cause failure in my code, can't get the reason why

Sorry, problem was solved by excluding GLUT and it's call. Cheers, Alex

[pygame] [pyopengl] glActiveTexture(GL_TEXTURE1) cause failure in my code, can't get the reason why

Hi all. I was trying to play with GLSL multi-texturing and as usual the problems don't want stay far away from me. Now i get problem with Texture units. glActiveTexture(GL_TEXTURE1) cause failure, i can't get the reason why. If i use only glActiveTexture(GL_TEXTURE0) then it's is OK, but in this

[pygame] Re: Data transferring from main python program to GLSL shader not happens in my case

Hi Ian. Thanks a lot for support, your inputs has resolved the problem! Uniform variables are working as expected. Now i may continue study shaders. Cheers, Alex

[pygame] Re: Data transferring from main python program to GLSL shader not happens in my case

On Jan 31, 1:08 am, Ian Mallett wrote: > No, it wasn't.  In your first code (http://bpaste.net/show/13357/), line > 116, you call glGetUniformLocation, but glUseProgram was not called at that > time.  I see that you're calling it in your main loop, which is good, but > the reason why you're not ge

[pygame] Re: Data transferring from main python program to GLSL shader not happens in my case

Hi Ian. > Your problem is that the shader is not bound (use something like > glUseProgram(blah)) when you try to get the variable. In all codes the command glUseProgram(program) was used. Without this command the python interpreter break the script running at command gl.glUniform3f Just thinking c

[pygame] Re: Data transferring from main python program to GLSL shader not happens in my case

Again me. I adapted the tuto http://www.pygame.org/wiki/GLSLExample close to my problem (just adding uniform variable into the shader and in python program few string to establish connection shader uniform variable and python program) The code http://bpaste.net/show/13357/ return blank screen gl.

[pygame] Data transferring from main python program to GLSL shader not happens in my case

Greetings all. Yesterday i am starting to probe how shaders works. I have aim to write shockwave effect using shader. I was using both tutorials to understand how it works: 1) http://www.pygame.org/wiki/GLSL_ARB_Example?parent=GLSLExample 2) http://pyopengl.sourceforge.net/context/tutorials/shader