currently, the (0, 0) position is at the center of the screen, but I want to set it at the top, left of the screen, how can I do it, try to change the matrix:

    for (int i = 0; i < 16; i++) {
        this.mtrxProjection[i] = 0.0f;
        this.mtrxView[i] = 0.0f;
        this.mtrxProjectionAndView[i] = 0.0f;
    }

    Matrix.orthoM(mtrxProjection, 0, 0f, width, height, 0f, 0.1f, 100f);
    Matrix.setLookAtM(mtrxView, 0, 0f, 0f, 1f, 0f, 0f, 0f, 0f, 1.0f, 0.0f);
    Matrix.multiplyMM(mtrxProjectionAndView, 0, mtrxProjection, 0, mtrxView, 0);

and the text can be displayed at 0, 0 but it has 180 angleDegX so I have to use this method:

    draw(string, x, y, 0, 180, 0, 0);

to rotate it again,

so how to set (0, 0) position at top, left of the screen without rotate the text?

Hi,
is it possible to set up encoding for the international fonts ?

Hi,

I changed content of OnSurfaceChanged function with code which sets origin to left top corner. But after that is text flipped. Please can someone help to fix it?

public void onSurfaceChanged(GL10 unused, int width, int height) { 
	GLES20.glViewport(0, 0, width, height);

	for(int i=0;i<16;i++)
	{
		mtrxProjection[i] = 0.0f;
		mtrxView[i] = 0.0f;
		mtrxProjectionAndView[i] = 0.0f;
	}

	Matrix.orthoM(mtrxProjection, 0, 0, width, height, 0, -1, 1);
	Matrix.setLookAtM(mtrxView, 0,
			0f, 0f, 1f,
			0f, 0f, 0f,
			0f, 1.0f, 0.0f);
	Matrix.multiplyMM(mtrxProjectionAndView, 0,
			mtrxProjection, 0,
			mtrxView, 0);
}

// Our matrices
private final float[] mtrxProjection = new float[16];
private final float[] mtrxView = new float[16];
private final float[] mtrxProjectionAndView = new float[16]; 

Many thanks

Flip coordinates!

Going to do it in bootstrap for mobile friendly

Hello,
How would I display an editable text in a live wallpaper? I am using the Rajawali opengl framework. OpenGL ES 2.0 I want the user to be able to edit the text through the preferences and it show up in front of the model or below it. I want to also use a custom font from my assets. I coded a canvas to bitmap but when I try to call it in my renderer, it doesn't show up. I don't get any errors in my logcat just a black screen on my device. I still don't completely understand canvas to bitmap but I thought I'd ask you since you obviously know how to do it. I would greatly appreciate your help. I've been at this for months and can't seem to get it working. Thank you in advance.

Hi,

I'm trying to incorporate GLText rendering in my app in combination with ARCore rendering (using BackgroundRenderer, PlaneRenderer, ObjectRenderer, for reference: https://github.com/google-ar/arcore-android-sdk/tree/master/samples/hello_ar_java/app/src/main/java/com/google/ar/core/examples/java/common/rendering)

I've tried several things, like changing the order of rendering, disabling depth test, etc..
Nothing seems to help.

These are the error appearing in the log:

W/GLConsumer: [SurfaceTexture--1-7652-1] bindTextureImage: clearing GL error: 0x501

E/ARCoreVideoRenderer: Exception on the OpenGL thread java.lang.RuntimeException: Draw: glError 1281

Any ideas as to what might cause this?
Could this be some kind of texture conflict?

Fyi, this is on a Samsung S8, Android 8.0.0

I suspect that this project currently crashes the latest version of the VS Android Emulator (v 1.1.622.2). I've tracked it down to the unbind function in Vertices.java:

public void unbind()  {
	GLES20.glDisableVertexAttribArray(mTextureCoordinateHandle);
}

It would appear that glDisableVertexAttribArray also needs to be called on mMVPIndexHandle, and I'm guessing mPositionHandle probably needs it as well. I haven't seen this on any physical hardware and it only broke on the emulator sometime over the past year.

My apologies for not fixing this myself and submitting a pull-request, I'm not actually set up with Android Studio at the moment and have only seen this in a C#/Xamarin port of the code (although I'd be rather surprised if that was somehow causing it).