Editing WoW:SetTexCoord Transformations (section)

===Simple rotation of textures about their own center===
It may just have been a lack of understanding on my part but the above methods did not work for me; Or at least did not meet my needs.

To be explicit, I wanted to be able to rotate a texture about its own center.

In other words, I wanted the texture to spin in place, and not rotate or move the texture about the center of the UI, or its parent's center.

The following code gives a rough idea of how to animate a texture to make it spin.

But the basic method can be seen in the :SetTexCoord method :

 local angleInc = 0.25
 function myOnUpdate(self, elapsed)
  	self.timer = self.timer + elapsed;
  	if ( self.timer > 0.05 ) then
   		self.hAngle = self.hAngle - angleInc;
   		self.s = sin(self.hAngle);
   		self.c = cos(self.hAngle);
   		miniNote:SetTexCoord(	0.5-self.s, 0.5+self.c,
   					0.5+self.c, 0.5+self.s,
   					0.5-self.c, 0.5-self.s,
   					0.5+self.s, 0.5-self.c);
   		self.timer = 0;
  	end
 end

angleInc has been precalculated as a Radians value - the larger it is, the faster the spin.

Or reduce the self.timer threshold to make a smoother rotation.


radians = (pi/180) * degrees