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我有一个与 [x, y, z, textureX, textureY,.....] 交错的 VBO，所有这些都可以正常工作和显示。我试图弄清楚在初始化时可以做什么并忘记了。

这是我目前正在尝试初始化的内容。

已编辑：修复了我的缓冲区的解除绑定并移动了一些代码。

        mPositionHandle = GLES20.glGetAttribLocation(mProgramHandle, "vPosition");
        mTextureUniformHandle = GLES20.glGetUniformLocation(mProgramHandle, "u_Texture");
        mTextureCoordinateHandle = GLES20.glGetAttribLocation(mProgramHandle, "a_TexCoordinate");

        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, glBufferObjects.get(0));
        GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, interleavedBuffer.capacity() * BYTES_PER_FLOAT, interleavedBuffer, GLES20.GL_STATIC_DRAW);          

        //////////These are superfluous but I'd like to do them once since they never change///// 
        GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle);
        GLES20.glVertexAttribPointer(mTextureCoordinateHandle, mTextureCoordinateDataSize, GLES20.GL_FLOAT, false,
                INTERLEAVED_VERTEX_TEXTURE_STRIDE, 3 * BYTES_PER_FLOAT);

        GLES20.glEnableVertexAttribArray(mPositionHandle);
        GLES20.glVertexAttribPointer(mPositionHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false,
                INTERLEAVED_VERTEX_TEXTURE_STRIDE, 0);
        ////////////////////////////////////////////////////

        mMVPMatrixHandle = GLES20.glGetUniformLocation(mProgramHandle, "uMVPMatrix");

        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);
        GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, glBufferObjects.get(1));
        GLES20.glBufferData(GLES20.GL_ELEMENT_ARRAY_BUFFER,
                drawListBuffer.capacity() * BYTES_PER_SHORT,
                drawListBuffer,
                GLES20.GL_STATIC_DRAW);
        GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, 0);

这是有效的。我弄乱了一堆，但我不知道每个并条机需要什么，因为它需要或者我做错了。任何帮助，将不胜感激。

public void draw(float[] mvpMatrix) {
    GLES20.glUseProgram(mProgramHandle);
    GLES20.glUniform1i(mTextureUniformHandle, 0);

    GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureDataHandle);
    GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, glBufferObjects.get(0));
    GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, glBufferObjects.get(1));        

    GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle);
    GLES20.glVertexAttribPointer(mTextureCoordinateHandle, mTextureCoordinateDataSize, GLES20.GL_FLOAT, false,
            INTERLEAVED_VERTEX_TEXTURE_STRIDE, 3 * BYTES_PER_FLOAT);


    GLES20.glEnableVertexAttribArray(mPositionHandle);
    GLES20.glVertexAttribPointer(mPositionHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false,
            INTERLEAVED_VERTEX_TEXTURE_STRIDE, 0);

    GLES20.glUniformMatrix4fv(mMVPMatrixHandle, 1, false, mvpMatrix, 0);
    GLES20.glDrawElements(GLES20.GL_TRIANGLES, 6, GLES20.GL_UNSIGNED_SHORT, 0);

    GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);
    GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, 0);
}

编辑：更新 - 如果我删除

    GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle);
    GLES20.glVertexAttribPointer(mTextureCoordinateHandle, mTextureCoordinateDataSize, GLES20.GL_FLOAT, false,
            INTERLEAVED_VERTEX_TEXTURE_STRIDE, 3 * BYTES_PER_FLOAT);


    GLES20.glEnableVertexAttribArray(mPositionHandle);
    GLES20.glVertexAttribPointer(mPositionHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false,
            INTERLEAVED_VERTEX_TEXTURE_STRIDE, 0);

从我的 draw() 它抛出一个 gl_draw_error_checks:418: GL_INVALID_OPERATION

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1 回答 1

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如果您不使用扩展，则每帧都需要调用 glEnableVertexAttribArray 和 glVertexAttribPointer。

但是，如果扩展 OES_vertex_array_object 可用，那么您可以使用顶点数组对象将此信息与 VBO 数据一起存储。然后你只需要每帧调用 glBindVertexArray 和 glDrawArrays 。

于 2013-04-29T16:35:44.377 回答