How to rotate a set of Vectors?

Coding Python Support
1

Hi, I am trying to rotate a list of vectors and was wondering how I can go about doing this.

So I create a circle like this:

(a, b, z) = (0,0,0) #position of circle

vertices = []
radius = 0.8 # circle radius

for angle in range(0, 360, 60):
  print(angle)
  radians = math.radians(angle)
  x = a + radius * math.cos(radians) 
  y = b + radius * math.sin(radians) 
  vertices.append( (x,y,z))

Is there a way I can translate the circle all while rotating the circles direction towards that same translation vector?

I am trying to achieve this old method which uses a real circle with vertices(worked fine but a bit of performance lag) so I’d like to switch to GPU shader. The vertices are assigned as the Draw shader “pos”

tkv04kSYCs

2

If I’m understanding your question, what you want is to simulate rotating the circle around the 3D cursor. If that’s it, write code to:

  • moves the cursor to the point around which you want to do the rotation,
  • changes the Transform Pivot Point from Individual Origins to 3D Cursor, and
  • does the rotation.

If I’ve misunderstood what you’re trying to do, please disregard this reply. :slight_smile:

3

I’m trying to align circle points to a vector( volume raycast ) while moving the circle location to match that same raycast location.

1 Like
4

You’re trying to simulate the pool of light cast while shining a flashlight around a room?