77 lines
2.4 KiB
Java
77 lines
2.4 KiB
Java
package com.bn.Sample16_5;
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import android.opengl.GLSurfaceView;
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import android.opengl.GLES20;
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import android.util.Log;
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import javax.microedition.khronos.egl.EGLConfig;
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import javax.microedition.khronos.opengles.GL10;
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import android.content.Context;
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class MySurfaceView extends GLSurfaceView
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{
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private SceneRenderer mRenderer;//场景渲染器
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public MySurfaceView(Context context) {
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super(context);
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this.setEGLContextClientVersion(2); //设置使用OPENGL ES2.0
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mRenderer = new SceneRenderer(); //创建场景渲染器
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setRenderer(mRenderer); //设置渲染器
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setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY);//设置渲染模式为主动渲染
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}
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private class SceneRenderer implements GLSurfaceView.Renderer
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{
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GrainForDraw grainForDraw; //粒子系统
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//测试刷帧频率的代码
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long olds;
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long currs;
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public void onDrawFrame(GL10 gl)
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{
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//注释掉的为测试刷帧频率的代码
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currs=System.nanoTime();
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Log.d("FPS", (1000000000.0/(currs-olds)+"FPS"));
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olds=currs;
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//清除深度缓冲与颜色缓冲
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GLES20.glClear( GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
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//保护现场
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MatrixState.pushMatrix();
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//绘制粒子系统
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grainForDraw.drawSelf();
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//恢复现场
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MatrixState.popMatrix();
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}
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public void onSurfaceChanged(GL10 gl, int width, int height) {
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//设置视窗大小及位置
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GLES20.glViewport(0, 0, width, height);
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//计算GLSurfaceView的宽高比
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float ratio = (float) width / height;
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//调用此方法计算产生透视投影矩阵
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MatrixState.setProjectFrustum(-ratio, ratio, -1, 1, 1, 1000);
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//调用此方法产生摄像机9参数位置矩阵
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MatrixState.setCamera(0,0,20,0,0,0,0f,1.0f,0.0f);
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}
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public void onSurfaceCreated(GL10 gl, EGLConfig config) {
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//设置屏幕背景色RGBA
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GLES20.glClearColor(0.0f,0.0f,0.0f,1.0f);
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//创建焰火粒子系统
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grainForDraw=new GrainForDraw(MySurfaceView.this,
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2, //点的大小
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8000 //点的个数
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);
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//打开深度检测
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GLES20.glEnable(GLES20.GL_DEPTH_TEST);
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//关闭背面剪裁
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GLES20.glEnable(GLES20.GL_CULL_FACE);
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//初始化变换矩阵
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MatrixState.setInitStack();
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}
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}
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}
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