[Solved] [LibGDX] Shader problem is beginning to piss me off

Newbie & Debugging Questions
#1

I’ve written and used shaders for libgdx in the past, but never run into this stupid f**king problem.

“no uniform with name ‘u_texture’ in shader”


Exception in thread "LWJGL Application" java.lang.IllegalArgumentException: no uniform with name 'u_texture' in shader
	at com.badlogic.gdx.graphics.glutils.ShaderProgram.fetchUniformLocation(ShaderProgram.java:293)
	at com.badlogic.gdx.graphics.glutils.ShaderProgram.fetchUniformLocation(ShaderProgram.java:283)
	at com.badlogic.gdx.graphics.glutils.ShaderProgram.setUniformi(ShaderProgram.java:307)

Here’s my shader fragment program


#ifdef GL_ES
precision mediump float;
#endif

uniform sampler2D u_sampler2D;
uniform vec2 u_resolution;

varying vec4 v_color;
varying vec2 v_texCoord0;

void main()
{
	vec4 color = texture2D(u_sampler2D, v_texCoord0) * v_color;
	vec2 fragPos = gl_FragCoord.xy / u_resolution.xy; //will give range in [0-1, 0-1]
	float dist = distance(fragPos, vec2(0.5, 0.5)); //distance to the center of the screen
	
	gl_FragColor = vec4(0, 0, dist, 1);
}

I’ve tried for so long to get this shit to work. None of my other shaders have this f**king problem.

And here’s the real kicker. I put my exact same shader code in a different libgdx project and it worked, but in this new project it keeps giving me this stupid f**king error.

I even tried setting the sampler2D’s name to u_texture and that didn’t work.