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我正在尝试在 NVIDIA Quadro 5000 上使用立体 3D 渲染绘制从 .obj 文件加载的基本网格。据我所知，我认为我的左眼和右眼截锥体和偏移量已相应设置，但我的主要问题是写入和清除 BACK_LEFT 和 BACK_RIGHT 缓冲区。似乎它完全错过了第一部分，只绘制了 BACK_RIGHT 缓冲区（渲染循环的第二部分）。如果我能得到一些关于如何在同一帧中写入/读取和清除这些缓冲区的指示，那就太好了。它是一个 Linux 应用程序，因此是 glXSwap()，不使用 glut 或 glew 并使用 glm 进行数学运算。这是我的绘图循环：

void GLDraw::Draw()
{
    //initialise shader in frame
    shader->UseShaderProgram();

    //select back_left buffer
    glDrawBuffer(GL_BACK_LEFT);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    //set projection and view for back_left
    projectionMatrix = glm::frustum(-xCoord - frustumAssymmetry, xCoord - frustumAssymmetry, -yCoord, yCoord, 0.1f, 200.0f);
    projectionMatrix *= glm::translate(glm::mat4(1.0f), glm::vec3(eyeOffset, 0.0f, 0.0f));
    glUniformMatrix4fv(projectionMatrixLocation, 1, GL_FALSE, value_ptr(projectionMatrix));
    glUniformMatrix4fv(viewMatrixLocation, 1, GL_FALSE, &viewMatrix[0][0]);

    //set model matrix for rendering calls   
    modelMatrix = scale(mat4(1.0f), vec3(0.7, 0.7, 0.5f));
    modelMatrix *= translate(mat4(1.0f), vec3(0.0f, 0.0f, 0.0f));
    modelMatrix *= rotate(mat4(1.0f), i+=0.04, vec3(0.0f, 1.0f, 0.0f));
    glUniformMatrix4fv(modelMatrixLocation, 1, GL_FALSE, &modelMatrix[0][0]);

    //draw VAO
    glBindVertexArray(vikingVAO);
    glDrawElements(GL_TRIANGLES, viking_elements.size() * sizeof(viking_elements[0]), GL_UNSIGNED_SHORT, 0);
    glBindVertexArray(0);

    //select back_right buffer  <-- SEEMS TO ONLY RENDER FROM HERE, MISSING THE FIRST PART
    glDrawBuffer(GL_BACK_RIGHT);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    //set projection and view for back_right
    projectionMatrix = glm::frustum(-xCoord + frustumAssymmetry, xCoord + frustumAssymmetry, -yCoord, yCoord, 0.1f, 200.0f);
    projectionMatrix *= glm::translate(glm::mat4(1.0f), glm::vec3(-eyeOffset, 0.0f, 0.0f));
    glUniformMatrix4fv(projectionMatrixLocation, 1, GL_FALSE, value_ptr(projectionMatrix));
    glUniformMatrix4fv(viewMatrixLocation, 1, GL_FALSE, &viewMatrix[0][0]);

    //set model matrix for rendering calls   
    modelMatrix = scale(mat4(1.0f), vec3(0.7, 0.7, 0.5f));
    modelMatrix *= translate(mat4(1.0f), vec3(0.0f, 0.0f, 0.0f));
    modelMatrix *= rotate(mat4(1.0f), i+=0.04, vec3(0.0f, 1.0f, 0.0f));
    glUniformMatrix4fv(modelMatrixLocation, 1, GL_FALSE, &modelMatrix[0][0]);

    //draw VAO
    glBindVertexArray(vikingVAO);
    glDrawElements(GL_TRIANGLES, viking_elements.size() * sizeof(viking_elements[0]), GL_UNSIGNED_SHORT, 0);
    glBindVertexArray(0);

    //clear shader
    shader->ClearShaderProgram();

    //swap buffers
    glXSwapBuffers(display, win);
}

编辑：意识到如果我在正确的屏幕上运行我的应用程序，它会呈现 GL_BACK_RIGHT 缓冲区。在左侧屏幕上运行它会绘制 GL_BACK_LEFT。

有任何想法吗？可能是显示器设置？

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