Comments (1)
alindas
commented on August 10, 2024
归一化的设备坐标：
范围从-1到1的二维空间，其中，(0,0)指的是屏幕中心，(-1,-1)指的是屏幕的左下角，(1,1)指的是屏幕的右上角
renderer 的 domEle 与屏幕宽高一致的换算：
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
如果渲染器的尺寸并非全屏，你应该相对于渲染器的宽高（而不是窗口或屏幕的宽高）来计算鼠标位置。并且需要考虑相对于渲染器的偏移。
let rect = rendererDom.getBoundingClientRect();
// 将鼠标位置降维为 device coordinates (-1 to +1)
mouse.x = ((event.clientX - rect.left) / rect.width) * 2 - 1;
mouse.y = -((event.clientY - rect.top) / rect.height) * 2 + 1;
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