Android OpenGL GLSurfaceView 예제

안드로이드에서 OpenGL ES를 사용하려면 가장 간단하게 GLSurfaceView를 사용하면 된다.
GLSurfaceView를 생성하고 GLSurfaceView.Renderer를 구현하면 기본적인 뼈대가 완성 된다.
아래의 예제는 화면을 빨간색으로 지우는 단순한 예제이다.

package com.duongame.opengl;

import android.opengl.GLSurfaceView;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {
    GLSurfaceView glSurfaceView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        glSurfaceView = new GLSurfaceView(this);
        glSurfaceView.setRenderer(new MainRenderer());
        setContentView(glSurfaceView);

        //setContentView(R.layout.activity_main);
    }
}

package com.duongame.opengl;

import android.opengl.GLSurfaceView;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;

public class MainRenderer implements GLSurfaceView.Renderer {
    @Override
    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
        gl.glClearColor(1,0,0,1);
    }

    @Override
    public void onSurfaceChanged(GL10 gl, int width, int height) {

    }

    @Override
    public void onDrawFrame(GL10 gl) {
        gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
    }
}