With normal caveats regarding "threads" (web workers in web parlance) you could just run your data simulation in a thread and then use the main thread to update your VBO and render.

That's becoming even more weird:

GLFunctions::gl30()->glGenTextures(1, &texHandle);

returns 2 in texHandle.

but for using it in the shader it works for a value of 1 in the bindTexture

GLFunctions::gl30()->glBindTexture(GL_TEXTURE_2D, texHandle-1);

This is driving me nuts.

Hi,

Why do you want to combine them back into and int ?

If you have a ARGB image, basically you have:

uchar *start = (uchar *) img.constBits(); uchar *alpha = start + 0; uchar *red = start + 1; uchar *green = start + 2; uchar *blue = start + 3; // First alpha value: uint8 alphaValue = *alpha; // Second value of alpha alphaValue = *(alpha + 4)

if you want to sum them, then make alphaValue an int and that's all.

hi
well you can hook up the AUDIO positionchanged
signal to your own method (slot)
using connect.
http://doc.qt.io//qt-5/signalsandslots.html

so it will directly call your method when it changes.

@HW-Developer
OK, I don't want to discourage you, maybe you just want to play with it, I've said I have no knowledge. But maybe if that sort of thing was freely available from 2005 there are some more recent ones which might be better?

@Lays147 hi I got some 12 years experience in QtOpenGL very well. May be I will be interested to join you if you like please write to me 'yellowlemontree0821@gmail.com'

I guess it has it's place in solutions that really need strong quality assurance often tied with a requirement that the correctness is provable.
for example you can (even automatically) prove that this piece has (or doesn't have) error:

glBegin(GL_TRIANGLES) glVertex3f(.0f, .0f, .0f); // too few ! glEnd();

On the other hand this:

glDrawArrays(GL_TRIANGLES, 42, 666);

although much much faster, driver friendly and hardware matching, depends on a whole bunch of other state that might not be so easily reasoned about statically or mechanically.

It's the same kinds of reasons that languages like Ada are still in use for mission-critical software like avionics, air-traffic or railway control. These are not the kind of applications you find on average Joe's laptop or iPhone.