2nd UV coord set not working?

[SpiderPig]

Hey Josh, using the first coord set I can send any value over to the shader and it works.  But it won't work for the 2nd set.

This is how I'm setting the data.

for (auto v = 0; v < mesh->CountVertices(); v++) {
	mesh->SetVertexTexCoords(v, 2.0f, 0.0f, 1);
}

In my custom frag shader I'm doing something like this.

if(tex_coords.z == 2.0f){
	color = vec4(0,1,0,1);
}
else{
	color = vec4(1,0,0,1);
}

In my tests 'z' is never equal to 2.  I have tried 'w' as well.

I've looked over the vertex shaders and the coords are not being modified anywhere in the shaders to cause the 2nd coord set not to work.

 

I tested the x and y components and they do work.

This works.

for (auto v = 0; v < mesh->CountVertices(); v++) {
	mesh->SetVertexTexCoords(v, 2.0f, 0.0f, 0);//<- first uv set
}

Shader that works.

if(tex_coords.x == 2.0f){//<- testing x instead of z
	color = vec4(0,1,0,1);
}
else{
	color = vec4(1,0,0,1);
}

 

Not sure how to put together a simple example for this one, but if there's a way you can take a look to see if the the 2nd coord set data is actually being transferred to the GPU maybe?

[Josh]

Can you check a > test instead of an exact equals? Something like this:

for (auto v = 0; v < mesh->CountVertices(); v++) {
	mesh->SetVertexTexCoords(v, 2.0f, 0.0f, 1);
}

 

if(tex_coords.z > 1.0f){
	color = vec4(0,1,0,1);
}
else{
	color = vec4(1,0,0,1);
}

 

[SpiderPig]

This works.

if(tex_coords.z > 0.0f){
	color = vec4(0,1,0,1);
}
else{
	color = vec4(1,0,0,1);
}

But this does not.

if(tex_coords.z > 1.0f){
	color = vec4(0,1,0,1);
}
else{
	color = vec4(1,0,0,1);
}

 

[SpiderPig]

if ( in_TexCoords.z > 0.5f ) {
	color[0] = vec4( 0.0f, 1.0f, 0.0f, 1.0f );
	
}
else {
	color[0] = vec4( 1.0f, 0.0f, 0.0f, 1.0f );
	
}

It seems that from left to right the 'z' value is going from 0 to 1.  I'm going to check other areas in my code.  It is possible I'm accidently overwriting this value somewhere...

[SpiderPig]

Um.... this isn't a bug.  It's my code, the 2nd coord set was being overwritten elsewhere that I had forgotten about.  Sorry Josh.