Error with Overdraw shader

Questions
1

I have a debug shader that shows overdraw, it worked fine until I added a sprite with a tinting script. The shader is super simple.

overdraw.fp

varying mediump vec4 position;
varying mediump vec4 var_color;
uniform lowp vec4 tint;

void main()
{
    gl_FragColor = vec4(0.12, 0.0, 0.0, 0.0);
}

overdraw.vp

uniform mediump mat4 view_proj;
uniform mediump mat4 world;

attribute mediump vec4 position;
attribute mediump vec2 texcoord0;

varying lowp vec4 var_color;

void main()
{
    gl_Position = view_proj * vec4(position.xyz, 1.0);
        
    var_color = vec4(1.0, 1.0, 1.0, 1.0); 
}

Other relevant stuff is here.

2016-08-21 22_21_28-Pocket Adventure.png712×1272 2.37 KB

The error I get is this

ERROR:GRAPHICS: gl error 1282: invalid operation

Assertion failed: 0, file ..\src\opengl\graphics_opengl.cpp, line 1141

But I can’t figure out why, help would be appreciated. :smiley:

2

The error is seemingly produced by a previous call to glUniform4fv. How are you setting the tint from the script?

3

Like this

go.property("tint", vmath.vector4(1, 1, 1, 1))

function init(self)
	sprite.set_constant("#sprite", "tint", self.tint)
end