All Steps

1. Model
2. Draw handler
3. Tick handler
4. Key handler?
5. Mouse handler?

1. Decide model

• What will the computer remember in order to draw a scene?

  • the moving parts

  • image or number (usually)

• Write down type of model: image, number, string.

• Make an example (used in later testing).

2. Draw handler

• How will you draw the model on the screen?

  • non-moving parts go here

  • place image in appropriate spots

• Write and test this function!

3. Tick handler

• How will the model change from second to second?

  • in comes old model
  • out goes new model

• Write function and test a single step first!