SellyCloudSDK_Android_demo/example/src/main/res/raw/simple_vertex.glsl

attribute vec4 aPosition;
attribute vec4 aTextureCoord;

uniform mat4 uMVPMatrix;
uniform mat4 uSTMatrix;

varying vec2 vTextureCoord;

void main() {
  gl_Position = uMVPMatrix * aPosition;
  vTextureCoord = (uSTMatrix * aTextureCoord).xy;
}