Computer Science 225
Advanced Programming

Spring 2021, Siena College

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Agenda

• Announcements
  • no ongoing labs or problem sets, no upcoming exam!
  • no class Monday
  • labs resume as usual next week (please fill out my form)
  • watch for an intro to problem set 4 next week
• Quadtrees
  • a look at the remaining methods
  • In-class exercise: quadtree traversals (3 points)
  • iteration over quadtrees
• More interesting event-driven programs
• Happy Easter!

Examples

• Points2D: spatial data structures including an adaptive quadtree
• MouseDroppings: basic mouse event handling and maintaining a list of objects to redraw
• SpiralLines: dragging to draw spiral shapes
• SunAndMoon: move/drag events to affect the state of objects displayed
• UglyDragABall: dragging an object with the mouse, but a little ugly
• DragABall: dragging an object with the mouse, better
• DragMany: drag any of many objects, including a custom class to represent the shapes we drag