Animate bezier straight lines?

I want how to animate a bezier straight line like see-saw. Can somebody please suggest. Reference link for animation...

OpenGL Mouse Tracking (Freeform Line)?

At the moment I am trying to make a program that tracks the mouse coordinates so that it draws a freeform line as yo...

rotation of the line by 30 degrees?

Sometimes A can be below line BC and sometimes above -> so sometimes rotate clockwise and sometimes countercloc...

Line width in other angle?

I draw line like this: - (void)drawRect:(CGRect)rect { _lineColor = [UIColor blackColor]; [_lineColor set...

Find a point along an angled line?

I'm trying to figure out how to find a point along a line (half way, to be precice). I need this to put a particle...