Polar rose curve animation with curve stitching using linear interpolation (lerp).
We animate the polar rose curve r(theta)=5cos(4theta/7) in increments of .04 for theta. The rose curve animation is traced by a thin yellow line as red lines are generated by two points on the curve separated by 40 increments of the animation parameter. The red lines are generated using linear interpolation or "lerp" to join the two points as they trace the polar rose.