Question

我正试图在Android上用OpenGL ES 2.0+绘制一个球体，我在Logcat中看到以下错误：

在禁用VERTEX_ARRAY客户端状态的情况下调用glDrawElements！

我查看了这个电话的文档，我看不出任何可能出错的内容。从错误中听起来我错过了某些设置。

这是我正在进行设置的VertexBuffer类：

public class VertexBuffer {

    private final int mBufferId;

    public VertexBuffer(float[] vertexData) {
        // Allocate a buffer
        final int[] buffers = new int[1];
        glGenBuffers(buffers.length, buffers, 0);
        if (buffers[0] == 0) {
            throw new RuntimeException("Could not create a new VBO");
        }
        mBufferId = buffers[0];

        // Bind to the buffer
        glBindBuffer(GL_ARRAY_BUFFER, mBufferId);

        // Transfer data to native memory
        FloatBuffer vertexArray = ByteBuffer
            .allocateDirect(vertexData.length * BYTES_PER_FLOAT)
            .order(ByteOrder.nativeOrder())
            .asFloatBuffer()
            .put(vertexData);
        vertexArray.position(0);

        // Transfer data from native memory to the GPU buffer
        glBufferData(GL_ARRAY_BUFFER, vertexArray.capacity() * BYTES_PER_FLOAT, vertexArray, GL_STATIC_DRAW);

        // IMPORTANT: Unbind from the buffer when we are done with it
        glBindBuffer(GL_ARRAY_BUFFER, 0);
    }

    public void setVertexAttribPointer(int dataOffset, int attributeLocation, int componentCount, int stride) {
        glBindBuffer(GL_ARRAY_BUFFER, mBufferId);
        glVertexAttribPointer(attributeLocation, componentCount, GL_FLOAT, false, stride, dataOffset);
        glEnableVertexAttribArray(attributeLocation);
        glBindBuffer(GL_ARRAY_BUFFER, 0);
    }
}

Answer 1

添加：

setEGLContextClientVersion(2);

在禁用VERTEX_ARRAY客户端状态的情况下调用glDrawElements

1 个答案: