3D: another round of help need it with gl4s/ogles2/nova and shaders.

@Capehill
Created BZ for Nova : http://www.amiga.org/developer/bugreports/view.php?id=886

And added Daniel and you , so everyone can monitor it.

Will ask also Hans to have a look at that, maybe he will find some time for

@Capehill

We start digging into issue with Monkey4 (black actors), and find out interesting detail.

See that shader: https://github.com/scummvm/scummvm/blo ... rs/emi_actorlights.vertex

(vertex one yes, not fragment one).

At the end of the shader we have that:

Color *= vec4(light, 1.0);

If we comment out this, we have such picture then:

https://kas1e.mikendezign.com/aos4/scu ... onkey4_no_color_light.jpg

And the same commented line, but this time picture from Win32:

https://kas1e.mikendezign.com/aos4/scu ... onkey4_win32_no_light.png

See, on our part, things go to the "blue/green" side, while should be none as on win32.

Also if we take a look on the door's knob, it's also BLUE, while should be YELLOW.

So all of this looks like the problem is somewhere in passing the fundamental color of the object ?

It just looks like something wrong in terms OF RGBA/ABGR or something. I.e. our "actor" are black because "full light on" from shader make them black, while should be other way around. And when we disable light, and can see colors going to "blue/green" side, mean something in terms of RGBA/BGRA or somethign wrong there ..

@kas1e

endian issue perhaps?

@Raziel
Yes, looks like this, and we found where, just we not very well understand if it issue in code, or in ogles2/nova.

And also it can be 2 bugs at once, but lephilousophe on it now, so soon should have something new about

@Raziel
Turns out that this issue with "black actors" is in end indeed can be 2 different issues.

First one we find that there issues with colors when VBO with GL_UNSIGNED_BYTE is used, bug report created:

http://www.amiga.org/developer/bugreports/view.php?id=887

Second one (why actuall all actors are black): we didn't find wtf for now , but we know for sure at the moment that it something about "lighting" in vertex shader.


@Capehill
Btw, do you ever meeting with issues when VBO is used together with GL_UNSIGNED_BYTE ?

@kas1e

Quote:

IIRC I have only used floats so I haven't experienced this issue.