javascript - Three.js 中的相机参数

Question

这是相机的实例化方式:

var camera = new THREE.PerspectiveCamera(
    VIEW_ANGLE,
    ASPECT,
    NEAR,
    FAR
);

这些值是什么意思？

Answer 1

我想知道同样的事情，所以我查了一下，这是一个 View “平截头体” .

我将在此处粘贴我在最近的一个项目中编写的代码注释，因为它很好地总结了恕我直言。

// "What the f*** is a frustum?" you ask. Well I did.
// Think about it as a truncated pyramid. The tip is the camera. From a certain
// point "down" the pyramid (the "near plane"), stuff can be seen on-screen.
// After the "base" of the pyramid (the "far plane"), stuff is too far to be
// seen. Stuff outside the pyramid is off-screen too. There is also the "aspect
// ratio" (the rectangle that makes up the pyramid's base, so this value is
// width/height) and the "field of view" (think of it as a lens or something,
// it distorts the pyramid so there's more objects on screen - it is set in
// degrees and 45° is more-or-less a "natural" perspective. The bigger the
// number, the more "perspective" there is).