rotate

General
1

Quick question, I havent figured it out yet, thought maybe someone else had. When you call rotate, I have come across couple methods for speed, but havent figured out rotation direction. All objects/images seem to go counter clockwise… Do I need to start calling out vec/X/Y etc etc ?

2

use negative degrees.

3

there is a trick: translate the rotated thing to 0, then rotate it and translate it back to the position before.

4

if you mean what i mean…

5

First, though the documentation states that rotate takes radians, it doesn’t. I think you’ve already worked that out. Secondly, the location of “north” for rotation purposes might be where you expect.

Try something like this

    pushMatrix()
    translate(self.x, self.y)
    rotate(self.deg - 90)
    ' your drawing here
    popMatrix()

Dont forget to push & pop (or clearMatrix()) to avoid compounding rotations.

6

@Mark from my brief look at the documentation rotate() says it uses degrees (while vec2:rotate mentions radians).

7

You’re right, I got the two mixed up. Apologies.

8

@Mark, Well “North” is relative I suppose. If I insert the sprite, I have to adjust it manually so its not facing the wrong way from the start. I think your comment about using push/pop/clearmatrix is my problem. It was receiving some “hand me downs” a half dozen lines up or so from another image.

Think an old school afterdark screensaver. All kinds of small stuff going off doing whatever… I have to be careful to clean up properly.

Thanks y’all !