How to get the width/height/length of a mesh in THREE.js [closed]

Question

I been researching various places about trying to get the width and height of a mesh but I have been able to find anything that works. I have a collada model that I imported and all I want to do is get the dimension of it in Webgl/Three.js Units so that I can calculate collision in my simple game. So how would I go about getting the width and height of a mesh in THREE.js?

Carlock

Please show what you attempted in order for others to be able to help. – Stomatitis

Can someone tell me why I got -rep? I just want to know to not do it again on my future questions – Carlock

You got negative reputation because someone down voted your question. A down vote is meant to mean "This question does not show any research effort; it is unclear or not useful." – Stomatitis

Thank You! I appreciate that you answered :D Also I couldnt add the code before since I was doing this on a tablet, but vincent posted the perfect answer :D – Carlock

You're welcome. You may want to still add the code because otherwise, your question is on its way to being closed. – Stomatitis

Answer 1

If you're ok with a basic bounding box, you can use a THREE.Box3

let measure = new THREE.Vector3();
let box = colladaModel.getSize(measure);
console.log( measure );

Bullion

This looks like the perfect solution, i'll try it when i have a chance and i'll tell u how it went! 😀 – Carlock

I used it and it worked perfectly, thanks again! – Carlock

It doesn't give correct dimensions – Brittain

hi @Tarun, can you explain in which conditions it does not work ? – Bullion

do I need to somehow normalize values in matrix? Id like to flip object on x axis and move its -x_width ... flip is okay, bot move seems incorect – Verminous

Just to keep it up two date: size method name was changed to getSize – Track

thank you @KrzysztofGrzybek, I've updated the code. – Bullion

but if the box(for example a text mesh) is rotated, the size is no more the exact width/height of that text. – Pyromorphite

Seems like Box3().getSize() has updated usage. A Vector3 needs to be passed into it as an argument. See here for implementation https://mcmap.net/q/354115/-what-is-the-proper-use-of-threejs-box3-getsize-method – Spinel

Thank you @Spinel I've updated the code. – Bullion

Doesn't work for me, throws this error: this.objects[0].getSize is not a function – Chadwickchae