- point-scale point factorprocedure
- point-scale! point factor #!optional destprocedure
Efficiently multiply the X and Y values of point by factor (a float or integer). E.g. factor 0.5 halves the values, factor 2.0 doubles the values. sdl2:point can only hold integer values, so the results will be truncated to integers. The results will be clamped to the range -2147483648 to 2147483647.
These procedures are available in sdl2 egg version 0.2.0 and higher.
- point-scale returns a new managed sdl2:point.
- point-scale! modifies and returns dest. If dest is omitted, point is modified and returned.