36 lines
839 B
Scheme
36 lines
839 B
Scheme
import draw.*;
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import colors.*;
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import geometry.*;
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class SW extends World {
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int x = 50;
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int y;
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int low;
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AColor c;
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AColor white = new White();
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SW(int y, int low, AColor c) { this.y = y; this.low = low; this.c = c; }
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boolean go() { return this.bigBang(100,100,.1); }
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World onTick() {
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if (y >= low)
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return endOfWorld("the end");
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else
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return new SW(this.y+1,this.low,this.c);
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}
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World onKeyEvent(String ke) { return this; }
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boolean draw() { return this.theCanvas.drawDisk(new Posn(this.x,this.y),3,c); }
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boolean erase() { return this.theCanvas.drawRect(new Posn(0,0),100,100,white); }
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}
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class Example {
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SW sw1 = new SW(10,40,new Red());
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SW sw2 = new SW(10,90,new Green());
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boolean tst1 = sw1.go();
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boolean tst2 = sw2.go();
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String result = "two worlds, green goes to bottom, red goes to center";
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} |