Three.js - 算法来设置相机，使整个场景显示了？ [英] Three.js - Algorithm to set the camera so the whole scene shows?

问题描述

当我安装我的场景，添加的几何形状等等，我怎么设置相机，所以我可以看到我的整个场景？我想要实现使用boundingboxes的算法，但我有点卡住了。

When I setup my scene, add geometries etc, how do I set the camera so I can see my whole scene? I'm trying to implement an algorithm using boundingboxes, but I'm kinda stuck.

推荐答案

您真的只需要使用找到所有的变量之间的最大绝对值Math.abs（数量），一旦找到了最伟大的，你可以设置相机的深度（position.z），以这个数字的。我做了一个简单的函数接收2号和返回是最大的。

You really only need to find the greatest absolute value between all your variables by using Math.abs(number), once you have found the greatest of all you can set the depth(position.z) of the camera to that number. I have made a simple function which receives 2 numbers and returns the greatest.

function findGreatestAbsolute( firstNumber, secondNumber ) {
    if( Math.abs( firstNumber ) > Math.abs( secondNumber )) {
        return Math.abs( firstNumber );
    } else { return Math.abs( secondNumber ); }
}

您还可以使用数组，如果有太多的数字。 一旦你找到了你的号码，你做的：

You can also use Arrays if there are too many numbers. Once you have found your number you do:

    camera = new THREE.PerspectiveCamera( cameraFov, windowHalfX / windowHalfY , 1, someDepth );
    camera.position.z(greatestNumber);

或

    camera.position.set(yourX, yourY, greatestNumber);

嗯，我希望它能帮助。

Well I hope it helps.

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