Cocos2d: warning: Uniform not found: u_color

cocos2d-x
#1

Playing with shaders, in cocos 3.13.1 JS, i see millions of that lines in console, regardless of the platform (osx,android and ios).

#cocos2d: warning: Uniform not found: u_color

Can i get rid of this somehow?

what i tired so far:
shader.setUniformFloat(“u_color”, …)

or in vertex shader:
uniform float u_color;

nothing seems to work, somehow i am afraid that this logging would cost performance, or that that what leads to this logging could be avoided, to save cycles.

Any ideas? Thank you in advance,
steff

#2

You need to set Uniform again if you change the Texture of Sprite.

Also, you need “uniform float u_color;” in your vertex shader.

On the other hand, Why your color is float? Should’t it be Vec4 ?

Mert

#3

thank you for your input, you are right with the vec4, this was a typo in my post.
I added a “uniform vec4 u_color;” line to the vertex shader, and after constructing my scene, on the shader state i am setting state.setUniformVec4(“u_color”, cc.math.vec4(0, 0, 0, 1.0));

But: i still see the u_color warnings in the console coming like a waterfall.

Also, i am not using a u_color in my shaders, but i would not mind adding one line, if it would help.
Just want to get rid of the console warnings.

Anything else i could try?

#4

If you are not using u_color, remove it from shader and dont set it as Uniform.

#5

Thank you again, now i am coming back to my initial post, just for clarification:
I see the warnings without mentioning a u_color anywhere in my code.

to reproduce:
create a JS project:

cocos new uniformwarningstest -p com.ati.uniformwarningstest -l js -d .

modify the Layer:

var HelloWorldLayer = cc.Layer.extend({
sprite:null,
ctor:function () {
this._super();

	this._layer3D = new cc.Layer();
	this.addChild(this._layer3D, 2);

	this._model = new jsb.Sprite3D(res.model);
	this._uvmap = cc.textureCache.addImage(res.HelloWorld_png);
	this._model.setTexture(this._uvmap);
	this._layer3D.addChild(this._model);
	
	this._model.setRotation3D(cc.math.vec3(0, 0, 0));
    this._model.setPosition3D(cc.math.vec3(0, 0, 0));
    this._model.setScale(15.0);	
    
	var shader = new cc.GLProgram(res.sh_vert, res.sh_frag);
	var state = cc.GLProgramState.create(shader);
	
	this._model.setGLProgramState(state);
	
	this._camera = new cc.Camera(cc.Camera.Mode.PERSPECTIVE, 75, cc.winSize.width / cc.winSize.height, .1, 200);
    this._camera.setCameraFlag(2);
    this._layer3D.addChild(this._camera);      
    this._layer3D.setCameraMask(2);
    this._camera.setPosition3D(cc.math.vec3(0, 0, 30));
    
    this._camera.lookAt(cc.math.vec3(0, 0, 0));
	return true;
}});

with those minimalistic shaders:

attribute vec4 a_position; attribute vec2 a_texCoord; attribute vec3 a_normal; attribute vec2 a_texCoord1;

void main(void) {
gl_Position = CC_MVPMatrix * a_position;
}

and frag:

void main (void)
{
gl_FragColor = vec4(0.3,0.3,0.3,0.6);
}

run this, in osx, android or ios, and see console dumping out this line over and over:

cocos2d: warning: Uniform not found: u_color

no “u_color” mentioned anywhere.
but i can see my model. can it be a problem with the material of in the c3b?

any help out there, please?

thanks. steff

#6

Happen in C++ as well

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