I've been programming OpenGL on Windows/SDL for a few years and am able to do quite a lot of advanced things with it.
I've switched over to Android and libgdx and over the past few days have tried to put a simple demo together, just a spinning cube.
Using libgdx's ObjLoader and Mesh classes, I loaded a cube mesh exported from blender(with normals and uv coords), and tried to apply a texture, and it draws a cube, but seems to only uses one texel from the texture to cover the whole model.
I've double checked the texture coordinates and even hand coded a plane with specific coordinates to test, and the same thing is happening.
This is the Vertex Shader:
attribute vec4 a_position;
attribute vec3 a_normal;
attribute vec2 a_texCoord;
uniform mat4 mvp;
varying vec3 outNormal;
varying vec2 outTexcd;
void main(){
outNormal = a_normal;
outTexcd = a_texCoord;
gl_Position = mvp * a_position;
}
And the fragment shader:
precision highp float;
varying vec3 outNormal;
varying vec2 outTexcd;
uniform sampler2D tex;
void main(){
vec3 norms = outNormal;
gl_FragColor = texture2D(tex,outTexcd);
}
But I don't think that's where the problem lies. Or maybe it does, I'm not sure.
Didn't want to clog up this question too much so the main source is here(pastebin): Main Source
If this is a bad question please let me know, It's my first one.
Playing with images I found the answer.
Was using a 32 bit .png RGBA8888, but not telling libgdx that.
Switched to take in the image as RGBA8888:
t = new Texture(Gdx.files.internal("Image/r3.png"),Format.RGBA8888,true);
I feel slightly sheepish, sorry all.
EDIT: Strangely, no transparency though...