动态更改 Raycaster 位置 [英] Changing Raycaster position dynamically

问题描述

我有一个画布，里面有几个立方体.我使用 Raycaster 来选择它们并改变它们的颜色.但是画布位于 draggable 对象内，当我四处移动时，我无法更改颜色，颜色更改在原始位置起作用.我想我也必须改变 Raycaster 的尺寸.我该怎么做?

I have a canvas, inside that I have several cubes. I use Raycaster to select them and change their colors. But the canvas is inside of a draggable object and when I move around I cannot change the colors, the color changing works in the original position. I think I also have to change the dimensions of the Raycaster. How can I do that?

这是示例.

推荐答案

尝试修改代码如下:

function onDocumentMouseDown( event ) {

    event.preventDefault();

    var x = event.offsetX == undefined ? event.layerX : event.offsetX;
    var y = event.offsetY == undefined ? event.layerY : event.offsetY;

    var vector = new THREE.Vector3();
    vector.set( ( x / renderer.domElement.width ) * 2 - 1, - ( y / renderer.domElement.height ) * 2 + 1, 0.5 );
    vector.unproject( camera );

    raycaster.ray.set( camera.position, vector.sub( camera.position ).normalize() );
...

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