The document discusses code for a program using Processing that draws a circle on a black background. The circle changes size when the mouse is near it, growing when less than 150 pixels away and shrinking when further. Methods are created to check the mouse distance, increase/decrease the circle size, and fill the background. The code is refined over multiple sections to improve readability and separate concerns.

1. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
#11
N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski)

2. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/10
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3. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
(x, y)
(mouseX, mouseY)

4. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
(x, y)
(mouseY - y)
(mouseX, mouseY)
(mouseX - x)

5. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
1
• 800 × 600 100 "
• 200
"
• 200 "
• 200
"
• 100

6. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
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7. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
float r;" void draw(){"
int x, y;" background(0, 0, 0);"
" if(dist(x, y, mouseX, mouseY) < 200){"
void setup(){" if(r < 200){"
size(800, 600);" r = r + 1;"
}"
smooth();"
}else if(r > 100){"
noStroke();"
r = r - 1;"
r = 100;"
}"
x = 400;"
ellipse(x, y, r, r);"
y = 300;"
}
}"
"

8. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
boolean
boolean inArea(){"
boolean result = "
dist(x, y, mouseX, mouseY) < 200;"
return result;"
}

9. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
if(dist(x, y, mouseX, mouseY) < 200){"
if(inArea()){

10. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
boolean inArea(){"
boolean result = "
dist(x, y, mouseX, mouseY) < 200;"
return result;"
}

11. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
boolean inArea(float d){"
boolean result = "
dist(x, y, mouseX, mouseY) < d;"
return result;"
}

12. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
void draw(){"
background(0, 0, 0);"
if(inArea(150)){"

13. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
void increaseSize(){"
}

14. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
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• 1
increaseSize 1
"
• "

15. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
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• 2 increaseSize
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16. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
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• increaseSize
decreaseSize "
• "
• decreaseSize

17. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
6
• increaseSize
"
• - * 0.05"
• "

18. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
7
• 6 decreaseSize

19. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
8
• blackout
"
"
rect "
• background blackout

20. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
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21. N. Shimizu (chiko@sfc.keio.ac.jp / @chikoski) 2011/07/14
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