为什么我的android openGL ES测试渲染器会崩溃

我再次尝试进入openGL,但像往常一样,我在传递顶点/顶点/任何东西时都会窒息,每一个小细节都可能导致灾难(格式错误、初始化设置不正确、内存保存在哪里等等)。

我的主要目标是将openGL用于2D图形,与常规cpu绘图相比,提高性能。

总之,我的openGL渲染器如下所示:

package com.derp.testopengl;


import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;

import android.opengl.GLU;
import android.opengl.GLSurfaceView.Renderer;

public class OpenGLRenderer implements Renderer {

    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
        // Set the background color to black ( rgba ).
        gl.glClearColor(1.0f, 0.0f, 0.0f, 0.5f);  // OpenGL docs.
        // Enable Smooth Shading, default not really needed.
        gl.glShadeModel(GL10.GL_SMOOTH);// OpenGL docs.
        // Depth buffer setup.
        gl.glClearDepthf(1.0f);// OpenGL docs.
        // Enables depth testing.
        gl.glEnable(GL10.GL_DEPTH_TEST);// OpenGL docs.
        // The type of depth testing to do.
        gl.glDepthFunc(GL10.GL_LEQUAL);// OpenGL docs.
        // Really nice perspective calculations.
        gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, // OpenGL docs.
                          GL10.GL_NICEST);
    }


    public void onDrawFrame(GL10 gl) {
        // Clears the screen and depth buffer.
        gl.glClear(GL10.GL_COLOR_BUFFER_BIT | // OpenGL docs.
                           GL10.GL_DEPTH_BUFFER_BIT);

        // Define the points of my triangle
        float floatbuff[] = {
                1.0f,0.0f,0.0f,
                0.0f,1.0f,0.0f,
                -1.0f,0.0f,0.0f
                };
        // Create memory on the heap
        ByteBuffer vbb = ByteBuffer.allocateDirect(3 * 3 * 4);
        vbb.order(ByteOrder.nativeOrder());
        FloatBuffer vertices = vbb.asFloatBuffer();

        // Insert points into floatbuffer
        vertices.put(floatbuff);
        // Reset position
        vertices.position(0);

        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

        // Change color to green
        gl.glColor4f(0.0f, 1.0f, 0.0f, 1.0f);

        // Pass vertices to openGL
        gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertices);

        // Draw 'em
        gl.glDrawArrays(GL10.GL_TRIANGLES, 0, 3);

        gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    }


    public void onSurfaceChanged(GL10 gl, int width, int height) {
        // Sets the current view port to the new size.
        gl.glViewport(0, 0, width, height);// OpenGL docs.
        // Select the projection matrix
        gl.glMatrixMode(GL10.GL_PROJECTION);// OpenGL docs.
        // Reset the projection matrix
        gl.glLoadIdentity();// OpenGL docs.

        // Should give a 2D coordinate system that responds to the screen
        gl.glOrthof(0.0f, width, 0.0f, height, 0, 200.0f);

        gl.glMatrixMode(GL10.GL_MODELVIEW); 
        gl.glLoadIdentity();// OpenGL docs.
    }
}

它目前正在线路上崩溃:

gl.glDrawArrays(GL10.GL_TRIANGLES, 0, 3);

带有IndexOutOfBoundsException,但我相信代码中还有更多问题。

感谢您的帮助!