我曾经也遇到过类似的情况。
开始学习OpenGL时,你可以先看一些非常基础的GLSurfaceView样例/演示。
首先,设置你的应用程序活动,并设置基本画布。
查看复制岛源代码文件GameRenderer.java,了解如何使用适当的GL标志设置画布以进行2D(精灵)渲染。你真的应该看看同一作者的SpriteMethodTest:http://code.google.com/p/apps-for-android/source/browse/trunk/SpriteMethodTest
请参见我发布自己代码的这个问题:Using OpenGL to replace Canvas - Android
在设置好画布后,你可以调用以下类似的函数:
gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
然后你就可以渲染一个精灵了。
首先,你需要将精灵加载到纹理中:http://qdevarena.blogspot.com/2009/02/how-to-load-texture-in-android-opengl.html
然而,这是真正帮助我的加载精灵的教程:
http://tkcodesharing.blogspot.com/2008/05/working-with-textures-in-androids.html
这是我做的,我有一个名为Texture.java的类:
public class Texture
{
public float x = 0;
public float y = 0;
public float z = 0;
public float width = 0;
public float height = 0;
private GL10 gl;
public int[] texture;
private int texture_name;
private int[] mCropWorkspace;
private final BitmapFactory.Options sBitmapOptions;
public Texture( GL10 gl_obj )
{
gl = gl_obj;
texture = new int[1];
mCropWorkspace = new int[4];
sBitmapOptions = new BitmapFactory.Options();
sBitmapOptions.inPreferredConfig = Bitmap.Config.RGB_565;
}
public int get_texture_name( )
{
return texture_name;
}
public boolean Load( Bitmap bitmap )
{
if ( gl == null )
{
Log.e(TAG, "Failed to load resource. Context/GL is NULL");
return false;
}
int error;
int textureName = -1;
gl.glGenTextures(1, texture, 0);
textureName = texture[0];
gl.glBindTexture(GL10.GL_TEXTURE_2D, textureName);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE);
gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, GL10.GL_REPLACE);
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
mCropWorkspace[0] = 0;
mCropWorkspace[1] = bitmap.getHeight();
mCropWorkspace[2] = bitmap.getWidth();
mCropWorkspace[3] = -bitmap.getHeight();
((GL11) gl).glTexParameteriv(GL10.GL_TEXTURE_2D,
GL11Ext.GL_TEXTURE_CROP_RECT_OES, mCropWorkspace, 0);
error = gl.glGetError();
if (error != GL10.GL_NO_ERROR)
{
Log.e(TAG, "GL Texture Load Error: " + error);
}
return true;
}
}
然后在我的onDrawFrame()方法中,我只需执行以下操作:
Texture texture = ...
gl.glBindTexture(GL10.GL_TEXTURE_2D, texture.texture[0]);
((GL11Ext) gl).glDrawTexfOES((float)(draw_x + 0.5), (float)(draw_y + 0.5), 0, tile_width, tile_height);
这将帮助您在openGL画布上绘制2D精灵。我注意到没有一个简单明了的教程。希望将来我会在我的开发博客上发布一篇:
http://developingthedream.blogspot.com/