Star Wars like Scroller
Last updated at 12:12 pm UTC on 16 January 2006
Author: Vanessa Freudenberg:
| warp src dest |
"Star wars like scrolling"
warp _ (WarpBlt toForm: Display)
cellSize: 1;
sourceForm: Display;
cellSize: 2;
combinationRule: Form over.
src _ {-200@-100. -50@100. 50@100. 200@-100}.
dest _ 0@0 corner: 200@100.
Display restoreAfter: [
[Sensor anyButtonPressed] whileFalse:
[warp copyQuad: src + Sensor cursorPoint
toRect: dest]]
Here's a version with correct perspective rendering :-)
Hans-Martin Mosner
| warp src dest step |
"Star wars like scrolling"
warp _ (WarpBlt toForm: Display)
cellSize: 1;
sourceForm: Display;
cellSize: 2;
combinationRule: Form over.
step _ 5.
Display restoreAfter: [
[Sensor anyButtonPressed] whileFalse:
[p := Sensor cursorPoint.
Display deferUpdatesIn: (0@0 extent: 400@400) while: [
5 to: 400-step by: step do: [:i |
d1 _ 200.0/i.
d2 _ 200.0/(i+step).
src _ {
-200@-400 * d1.
-200@-400 * d2 - (0@1).
200@-400 * d2 - (1@1).
200@-400 * d1 - (1@0)}.
dest _ (0@i extent: 400@step).
warp copyQuad: src + p+ (0@200)
toRect: dest]]]]
