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問候。我曾經在OpenGL中涉獵過，據我所知，用基於精靈的動畫完成2D遊戲的最佳方法是消除Z平面並設置正射投影，以便您可以使用笛卡爾座標進行紋理和繪製位置。如何在Android中的Ortho投影上渲染紋理
所以我一直在嘗試在android中實現這一點。我只是使用繪製函數中的所有構建函數，但使用vanilla drawbitmap函數分別渲染幾百個圖像會導致幀率下降。
一個矩形顯示在屏幕上，但紋理拒絕顯示。如果你可以看看，並讓我知道我要去哪裏錯了，我會非常感激。被警告我沒有像我想的那樣對opengl有全面的理解。我尊重任何可以圍繞這些東西的人。
這是精靈類含有結合的紋理繪製矩形：
public class Sprite {
private FloatBuffer vertexBuffer; // buffer holding the vertices
private FloatBuffer textureBuffer;
private int[] textures = new int[1];
private float vertices[] = {
0.0f, 0.0f,
0.0f, 32.0f,
32.0f, 0.0f,
32.0f, 32.0f
};
private float texture[] = {
0.0f, 0.0f,
0.0f, 16.0f,
16.0f, 0.0f,
16.0f, 16.0f
};
public Sprite() {
ByteBuffer byteBuffer = ByteBuffer.allocateDirect(vertices.length * 4);
byteBuffer.order(ByteOrder.nativeOrder());
vertexBuffer = byteBuffer.asFloatBuffer();
vertexBuffer.put(vertices);
vertexBuffer.position(0);
byteBuffer = ByteBuffer.allocateDirect(texture.length * 4);
byteBuffer.order(ByteOrder.nativeOrder());
textureBuffer = byteBuffer.asFloatBuffer();
textureBuffer.put(texture);
textureBuffer.position(0);
}
public void loadGLTexture(GL10 gl, Context context)
{
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(),
R.drawable.charactersprites);
gl.glGenTextures(1, textures, 0);
gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
//Not sure if I need these...
//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);
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
bitmap.recycle();
}
/** The draw method for the triangle with the GL context */
public void draw(GL10 gl) {
gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
//gl.glFrontFace(GL10.GL_CW);//is this necessary?
// set the colour for the triangle
//gl.glColor4f(0.0f, 1.0f, 0.0f, 0.5f);
// Point to our vertex buffer
gl.glVertexPointer(2, GL10.GL_FLOAT, 0, vertexBuffer);
gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureBuffer);
// Draw the vertices as triangle strip
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, vertices.length/2);
//Disable the client state before leaving
gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
}
}
這是渲染......我通過在srfaceview守住這樣我就可以得到高度和寬度投影
public class GlRenderer implements Renderer {
private Sprite sprite;
private GLSurfaceView surfaceView;
private Context context;
/** Constructor to set the handed over context */
public GlRenderer(GLSurfaceView surfaceView, Context context) {
this.sprite = new Sprite();
this.surfaceView = surfaceView;
this.context = context;
}
@Override
public void onDrawFrame(GL10 gl) {
// clear Screen and Depth Buffer
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
gl.glMatrixMode(GL10.GL_PROJECTION);
// Reset the Modelview Matrix
gl.glLoadIdentity();
gl.glOrthof(0.0f, surfaceView.getWidth(), surfaceView.getHeight(), 0.0f, -1.0f, 1.0f);
sprite.draw(gl);
}
@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
sprite.loadGLTexture(gl, this.context);
gl.glEnable(GL10.GL_TEXTURE_2D);
gl.glShadeModel(GL10.GL_SMOOTH);
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
gl.glClearDepthf(1.0f);
gl.glEnable(GL10.GL_DEPTH_TEST);
gl.glDepthFunc(GL10.GL_LEQUAL);
gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST);
}
}