3D 拾取在另一台计算机上不起作用 - lwjgl

Question

当我尝试将我的项目运行放在笔记本电脑上时，一切正常，但 3D 拾取出现问题。当我单击 3D 对象时，它会拾取不同的对象。

我在另一台笔记本电脑上试过，结果相同。然后我尝试将台式电脑的显示器固定到笔记本电脑上，以查看是否存在分辨率问题。但它仍然给出相同的结果。但它在我的台式电脑上完全可以正常工作。

我的台式机上有一个 Nvidia 760gtx gpu，而笔记本电脑只有 Intel HD 4500 gpu。是gpu的原因吗？我。我迷路了。我尝试了一切。这是我选择 3D 对象的代码。

public void select(int xx, int yy )
{
        // The selection buffer
        IntBuffer selBuffer = ByteBuffer.allocateDirect(1280).order(ByteOrder.nativeOrder()).asIntBuffer();
        int buffer[] = new int[256];

        IntBuffer vpBuffer = ByteBuffer.allocateDirect(64).order(ByteOrder.nativeOrder()).asIntBuffer();
        // The size of the viewport. [0] Is <x>, [1] Is <y>, [2] Is <width>, [3] Is <height>
            int[] viewport = new int[4];

        // The number of "hits" (objects within the pick area).
        int hits;
        // Get the viewport info
            GL11.glGetInteger(GL11.GL_VIEWPORT, vpBuffer);
            vpBuffer.get(viewport);


        // Set the buffer that OpenGL uses for selection to our buffer
        GL11.glSelectBuffer(selBuffer);

        // Change to selection mode
        GL11.glRenderMode(GL11.GL_SELECT);

        // Initialize the name stack (used for identifying which object was selected)
        GL11.glInitNames();
        GL11.glPushName(0);

        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glPushMatrix();
        GL11.glLoadIdentity();

        /*  create 5x5 pixel picking region near cursor location */
        GLU.gluPickMatrix( (float) xx, (float) yy, 0.001f, 0.001f,IntBuffer.wrap(viewport));

        GLU.gluPerspective(fov, screenResolutionx/screenResolutiony, near, far);
        render();
        GL11.glPopMatrix();
        // Exit selection mode and return to render mode, returns number selected
        hits = GL11.glRenderMode(GL11.GL_RENDER);
        System.out.println("hits: " + hits);

        selBuffer.get(buffer);
            // Objects Were Drawn Where The Mouse Was

            if (hits > 0) {
                  // If There Were More Than 0 Hits
                  choose = buffer[3]; // Make Our Selection The First Object
                  int depth = buffer[1]; // Store How Far Away It Is
                  for (int i = 1; i < hits; i++) {
                        // Loop Through All The Detected Hits
                        // If This Object Is Closer To Us Than The One We Have Selected
                        if (buffer[i * 4 + 1] <  depth) {
                              choose = buffer[i * 4 + 3]; // Select The Closer Object
                              depth = buffer[i * 4 + 1]; // Store How Far Away It Is
                        }
                  }
                  System.out.println("Chosen: " + choose);
            }




}

Answer 1

我终于明白了。这是因为GPU。我在 nvidia GPU (840m) 笔记本电脑上尝试过这种方法，效果很好。但是当我将 gpu 切换到 Intel HD 5500 时，选择无法正常工作。所以我的结论是使用 GL11.glRenderMode(GL11.GL_SELECT) 方法进行 3D 对象拾取仅适用于 nvidia GPU。它也可能适用于 ATI GPU（未测试），但不适用于 Intel。

3D 拾取在另一台计算机上不起作用 - lwjgl

3D picking doesnt work on another computer - lwjgl

java

lwjgl