使用 OpenGL 代替 Canvas - Android

Using OpenGL to replace Canvas - Android(使用 OpenGL 代替 Canvas - Android)
本文介绍了使用 OpenGL 代替 Canvas - Android的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

问题描述

我正在尝试用更快的 opengl-es 表面替换我已经拥有的基于 Canvas 的渲染系统,但是,我似乎无法让 openGL 渲染器以充当 2d 字段的方式符合要求,而不是透视图.

I am attempting to replace the Canvas-based rendering system that I already have with the faster opengl-es surface, however, I can't seem to get an openGL renderer to conform in such a way that it acts as 2d field, rather than a perspective view.

我当前的渲染器代码如下:

My current code for the renderer looks as follows:

     @Override
     public void onSurfaceChanged(GL10 gl, int width, int height) {
        gl.glViewport(0, 0, width, height);
        gl.glMatrixMode(GL10.GL_PROJECTION);
        gl.glLoadIdentity();
        gl.glOrthof(0.0f, width, 0.0f, height, 0.0f, 1.0f);

        gl.glShadeModel(GL10.GL_FLAT);
        gl.glEnable(GL10.GL_BLEND);
        gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
        gl.glColor4x(0x10000, 0x10000, 0x10000, 0x10000);
        gl.glEnable(GL10.GL_TEXTURE_2D);
    }

    @Override
    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
        gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST);

        gl.glClearColor(0.5f, 0.5f, 0.5f, 1);
        gl.glShadeModel(GL10.GL_FLAT);
        gl.glDisable(GL10.GL_DEPTH_TEST);
        gl.glEnable(GL10.GL_TEXTURE_2D);

        gl.glDisable(GL10.GL_DITHER);
        gl.glDisable(GL10.GL_LIGHTING);

        gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);    
    }

如何设置渲染器以使平移转换与屏幕上的像素匹配?(所以向右平移 5 会将其移动 5 个像素)

How would I setup the renderer so that the translate transformation would match up with the pixels on the screen? (so translating 5 to the right would move it 5 pixels)

推荐答案

请注意,在 openGL 中,Y 坐标是倒置的.否则一切都是一样的.
至于正确的标志,我建议你查看开源的安卓游戏副本岛:http://code.google.com/p/replicaisland/

Please note that in openGL that Y co-ordinate is inverted. Otherwise all is the same.
As for the correct flags, I recommend you check out the open source android game replica island: http://code.google.com/p/replicaisland/

这是我在自己的代码中使用的:

Here's what I use in my own code:

public void onSurfaceChanged(GL10 gl, int width, int height) 
{
    mViewWidth = width;
    mViewHeight = height;

    gl.glViewport(0, 0, mViewWidth,  mViewHeight);
    gl.glLoadIdentity();
    GLU.gluOrtho2D(gl, 0, mViewWidth, mViewHeight, 0);
}

public void onSurfaceCreated(GL10 gl, EGLConfig config) 
{
    gl.glClearColor(0.5f, 0.5f, 0.5f, 1);
    gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST);
    gl.glShadeModel(GL10.GL_FLAT);
    gl.glDisable(GL10.GL_DEPTH_TEST);
    gl.glEnable(GL10.GL_BLEND);
    gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE_MINUS_SRC_ALPHA); 

    gl.glViewport(0, 0, mViewWidth,  mViewHeight);
    gl.glMatrixMode(GL10.GL_PROJECTION);
    gl.glLoadIdentity();
    gl.glEnable(GL10.GL_BLEND);
    gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
    gl.glShadeModel(GL10.GL_FLAT);
    gl.glEnable(GL10.GL_TEXTURE_2D);

    GLU.gluOrtho2D(gl, 0, mViewWidth, mViewHeight, 0);
}

在哪里 mViewWidth &mViewHeight 是显示的大小.

Where mViewWidth & mViewHeight are the size of the display.

这篇关于使用 OpenGL 代替 Canvas - Android的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除!

相关文档推荐

Show progress during FTP file upload in a java applet(在 Java 小程序中显示 FTP 文件上传期间的进度)
How to copy a file on the FTP server to a directory on the same server in Java?(java - 如何将FTP服务器上的文件复制到Java中同一服务器上的目录?)
FTP zip upload is corrupted sometimes(FTP zip 上传有时会损坏)
Enable logging in Apache Commons Net for FTP protocol(在 Apache Commons Net 中为 FTP 协议启用日志记录)
Checking file existence on FTP server(检查 FTP 服务器上的文件是否存在)
FtpClient storeFile always return False(FtpClient storeFile 总是返回 False)