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Inverting a circle

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Inverting a circle

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DIEvAl

Rookie

Joined: Sun May 16, 2010 3:31 pm
Posts: 10

Inverting a circle

I use this code:


	Code: nxtEraseEllipse(x-radius, y-radius, x+radius, y+radius); nxtDrawEllipse (x-radius, y-radius, x+radius, y+radius); nxtDisplayStringAt(buttons[ID].xText, buttons[ID].yText, "%s", buttons[ID].text); if (checkButton(ID)) { for (int i=-radius; i<=radius; i++) nxtInvertLine(x-sqrt(radiusradius-ii), y+i, x+sqrt(radiusradius-ii), y+i); }

But when checkButton(ID)=true there are some not inverted pixels to the right of the circle:


	Attachments: File comment: checkButton(ID)=true c2.JPG [ 2.57 KiB \| Viewed 819 times ] File comment: checkButton(ID)=false c1.JPG [ 2.31 KiB \| Viewed 819 times ]

Fri May 21, 2010 3:27 am

DIEvAl

Rookie

Joined: Sun May 16, 2010 3:31 pm
Posts: 10

Re: Inverting a circle

It works!
But I don't understand why it works...
I changed


	Code: for (int i=-radius; i<=radius; i++) nxtInvertLine(x-sqrt(radiusradius-ii), y+i, x+sqrt(radiusradius-ii), y+i);


	Code: for (int i=-radius; i<=radius; i++) nxtInvertLine(x-sqrt(radius(radius+1)-ii)+1, y+i, x+sqrt(radius(radius+1)-ii), y+i);

Fri May 21, 2010 3:50 am

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