CPSC 110 Lecture Notes - Lecture 9: Angle Of Rotation

• School: UBC
• Department: Computer Science
• Course: CPSC 110
• Professor: Anthony Estey

Document Summary

;; design a world program where yoshi eggs appear wherever. ;; the user clicks the mouse and each egg spins as it falls. ;; there are no eggs, but each time the user clicks the mouse. ;; an egg is created at that position and falls directly down. ;; off the screen, spinning counter-clock-wise as it falls. (@htdw listofegg) ;; constants (define width 400) (define height 600) (define ctr-x (/ width 2)) (define ctr-y (/ height 2)) (define mario. ) (define mts (place-image mario. Ctr-x (- height (/ (image-height mario) 2) 5) (empty-scene width height))) (define yoshi-egg . ) (define fall-speed 5) ; pixels per tick (define spin-speed 5) ; degrees per tick (define initial-angle 0) ; starting rotation angle of new eggs. ;; data definitions: (@htdd egg) (define-struct egg (x y r)) ;; interp. the x, y position of an egg in screen coordinates (pixels),