Semi-Transparent Textures Possible? about rajawali HOT 4 CLOSED

Maybe try a discard in the fragment shader?

if(basecolor.a == 0.0){
discard;
}


from rajawali.

Hello Dennis,

Thank you for the response, but I don't think I was clear with my original question. I would like parts of the texture to be semi-transparent. I believe the discard you were referring to would remove those pixels completely, correct?

The png I provide for the texture has alpha values ranging from 0 to 1 with many values in between, but the way it gets rendered it looks as though the values are all either 0 or 1. Does that make sense?

Basically I want to be able to have a plane textured with an image of a cloud or and to have parts of it be semi-transparent. I know there is the fog feature I can enable, but I don't have as much control over it and it's not quite the look I am going for.

The person in this link asks the same question, but about opengl in general, if that clears things up:
http://stackoverflow.com/questions/3634444/android-opengles-alpha-textures-not-semitransparent-but-binary-transparent

Thanks for your help.

from rajawali.

Yeah, I see what you mean. The Z-buffer must be disabled when you use transparency. Basically you have to reorder the objects based on the distance to the camera. This way they should render properly. Check http://www.opengl.org/wiki/Transparency_Sorting#Depth_Sorting

from rajawali.

And how do we do that in Rajawali framework?
Thanks, Rudo.

Edit: I found the answer in Issue 100 -
mObject.setMaterial(new SimpleMaterial());
mObject.setBlendingEnabled(true);
mObject.setBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);

from rajawali.