Jump to content

Rotation mesh

Andrey Zimin

Recommended Posts

Friends! It's a simple mathematical problem. And it can be solved. That is the question. How is it possible to implement built-in methods of Babylon

So. There is an object. In the figure it is denoted P(xp, yp).
There is a point where the object should move. M(xm, ym)

The question of how to organize the rotation of the object so that its positive X-axis was directed in the direction M when the object moves.

I mathematically to calculate the angle? 


Or is there a method to which you can put the coordinates of the point and he will apply and I will turn my object in the desired direction?

WARNING: Rotate only around the axis Y (2D rotate)


Link to comment
Share on other sites

https://en.wikipedia.org/wiki/Dot_product (I think it's the cosine of that).  The formula in the Math class:

I think it returns the cosine of the angle between the 2.  Only rotating on the Y, then make the second vector have the same Y?  If you make a PG I think we can figure it out. 

Here's my favourite lookAt PG (I think it's from Adam):

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...