OpenGL帧缓冲区渲染到纹理不起作用

我正在尝试使用Java和JOGL使用framebuffers创建发光效果，但是遇到了问题。目前，我的目标是将用照明纹理进行纹理处理的飞船模型渲染为帧缓冲区纹理，然后将帧缓冲区纹理绘制到三角形扇形四边形。我正在与OpenGL 2.1和/或2.0一起运行这是用于生成帧缓冲区及其纹理的代码：

private int createFrameBuffer(GL2GL3 gl) {
    _frameBufferTextureId = GLHelper.makeTextureBuffer(gl, GL2GL3.GL_RGBA, _width / 2, _height / 2, 0, GL2GL3.GL_RGBA,
            GL2GL3.GL_UNSIGNED_BYTE, GL2GL3.GL_TEXTURE_MIN_FILTER, GL2GL3.GL_TEXTURE_MIN_FILTER, GL2GL3.GL_REPEAT, null);
    int frameBufferId = GLHelper.makeFrameBuffer(gl, _frameBufferTextureId, _width / 2, _height / 2);
    return frameBufferId;
}

public static int makeTextureBuffer(GL2GL3 gl, int glEnumInternalFormat, int width, int height, int border,
        int glEnumPixelFormat, int glEnumPixelType, int glEnumMinFilter, int glEnumMagFilter, int glEnumWrapMode,
        File textureFile) {
    ByteBuffer textureDataBuffer = null;
    if (textureFile != null) {
        String filePath = textureFile.getPath();
        String extension = filePath.substring(filePath.lastIndexOf('.') + 1, filePath.length());
        TextureData textureData = null;
        try {
            textureData = TextureIO.newTextureData(gl.getGLProfile(), textureFile, false, extension);
        } catch (IOException e) {
            throw new RuntimeException("Error reading texture");
        }
        textureDataBuffer = getProperlyFormattedBuffer(textureData);
    }
    IntBuffer texture = IntBuffer.allocate(1);
    gl.glGenTextures(1, texture);
    gl.glBindTexture(GL2GL3.GL_TEXTURE_2D, texture.get(0));
    gl.glTexParameteri(GL2GL3.GL_TEXTURE_2D, GL2GL3.GL_TEXTURE_MIN_FILTER, glEnumMinFilter);
    gl.glTexParameteri(GL2GL3.GL_TEXTURE_2D, GL2GL3.GL_TEXTURE_MAG_FILTER, glEnumMagFilter);
    gl.glTexParameteri(GL2GL3.GL_TEXTURE_2D, GL2GL3.GL_TEXTURE_WRAP_S, glEnumWrapMode);
    gl.glTexParameteri(GL2GL3.GL_TEXTURE_2D, GL2GL3.GL_TEXTURE_WRAP_T, glEnumWrapMode);
    gl.glTexImage2D(GL2GL3.GL_TEXTURE_2D, 0, glEnumInternalFormat, width, height, border, glEnumPixelFormat, glEnumPixelType,
            textureDataBuffer);
    gl.glBindTexture(GL2GL3.GL_TEXTURE_2D, 0);
    return texture.get(0);
}

public static int makeFrameBuffer(GL2GL3 gl, int textureBufferId, int width, int height) {
    IntBuffer frameBuffer = IntBuffer.allocate(1);
    gl.glGenFramebuffers(1, frameBuffer);
    gl.glBindFramebuffer(GL2GL3.GL_FRAMEBUFFER, frameBuffer.get(0));
    gl.glFramebufferTexture2D(GL2GL3.GL_FRAMEBUFFER, GL2GL3.GL_COLOR_ATTACHMENT0, GL2GL3.GL_TEXTURE_2D, textureBufferId, 0);
    verifyFrameBuffer(gl);
    gl.glBindFramebuffer(GL2GL3.GL_FRAMEBUFFER, 0);
    return frameBuffer.get(0);
}

private void drawTextureQuad(GL2GL3 gl) {
    _glowShader.bind(gl);
    int textureLocation = _glowShader.getUniformFields().getIlluminationTextureLocation();
    gl.glUniform1i(textureLocation, 0);
    gl.glActiveTexture(GL2GL3.GL_TEXTURE0);
    gl.glBindTexture(GL2GL3.GL_TEXTURE_2D, _frameBufferTextureId);

    int vertexLocation = _glowShader.getAttributeFields().getVertexLocation();
    gl.glBindBuffer(GL2GL3.GL_ARRAY_BUFFER, _textureQuadId);
    gl.glVertexAttribPointer(vertexLocation, 3, GL2GL3.GL_FLOAT, false, 0, 0);
    gl.glEnableVertexAttribArray(vertexLocation);

    int textureCoordLocation = _glowShader.getAttributeFields().getVertexTextureCoordinateLocation();
    gl.glBindBuffer(GL2GL3.GL_ARRAY_BUFFER, _textureQuadCoordsId);
    gl.glVertexAttribPointer(textureCoordLocation, 2, GL2GL3.GL_FLOAT, false, 0, 0);
    gl.glEnableVertexAttribArray(textureCoordLocation);

    gl.glDrawArrays(GL2GL3.GL_TRIANGLE_FAN, 0, 4);
    _glowShader.unbind(gl);
}

在我的渲染循环中，我正在执行以下操作：

_glowShader.bind(gl);// bind my Shader object.
gl.glUniformMatrix4fv(_glowShader.getUniformFields().getProjectionMatrixLocation(), 1, true, _projectionMatrix.getBuffer());
gl.glUniformMatrix4fv(_glowShader.getUniformFields().getModelViewMatrixLocation(), 1, true, _modelViewMat.getBuffer());
gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, _framebufferId);
gl.glDrawBuffers(1, _frameBufferAttachmentss); //contains GL_COLOR_ATTACHMENT0
gl.glViewport(0, 0, _width / 2, _height / 2); // same size as texture
_spaceship.draw(gl, _glowShader);// draw method in my ModelObject class
gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, 0);
_glowShader.unbind(gl);

drawTextureQuad(gl);

运行此命令时，将按原样绘制四边形，但纹理全为黑色。当我在渲染循环中注释掉任何帧缓冲区绑定时，将按应有的方式渲染模型，因此我知道我的着色器代码没有任何问题。当我将_frameBufferTextureId替换为从文件加载的另一个纹理时，该纹理已正确绘制，因此我知道我的纹理坐标在起作用，并且我的着色器代码也是正确的。但是，每当绑定帧缓冲区时，我都无法得到任何期望的东西。我也在验证我的帧缓冲区，它是GL_FRAMEBUFFER_COMPLETE。

我在这里阅读了无数有关stackoverflow的教程和文章，但是我终生无法弄清自己在做什么错。任何帮助将是巨大的！谢谢。