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Topic: circle thats follows mousepoint (Read 246 times) |
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kemo
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circle thats follows mousepoint
« on: Sep 29th, 2003, 2:40am » |
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Could someone hint/advise me how to let this code follow the mousepointer? Where should i implement mouseX, MouseY etc?
void setup()
{
size(300,300);
background(102);
noStroke();
smooth();
fill(203,90,70);
ellipseMode(CENTER_DIAMETER);
}
boolean groei = true;
float a = 100;
int x;
int y;
void loop()
{
x = width/2;
y = height/2;
ellipse(x, y, a, a);
if (groei==true)
{
a=a*1.02;
if(a>200)
{
groei=false;
}
}
else
{
if (a>100)
{
a=a*0.99;
}
else
{
groei=true;
}
}
}
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benelek
 
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Re: circle thats follows mousepoint
« Reply #1 on: Sep 29th, 2003, 3:24am » |
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if you mean that you want the centre of the circle to be drawn at (mouseX,mouseY), then the following will work:
Code:void setup()
{
size(300,300);
background(102);
noStroke();
smooth();
fill(203,90,70);
ellipseMode(CENTER_DIAMETER);
}
boolean groei = true;
float a = 100;
int x;
int y;
void loop()
{
x = mouseX; //modified line
y = mouseY; //modified line
ellipse(x, y, a, a);
if (groei==true)
{
a=a*1.02;
if(a>200)
{
groei=false;
}
}
else
{
if (a>100)
{
a=a*0.99;
}
else
{
groei=true;
}
}
} |
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Bijeoma
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Re: circle thats follows mousepoint
« Reply #2 on: Sep 29th, 2003, 4:28am » |
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or were you wanting the inner circle to scale in response to mouse movement?
bryan
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kemo
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Re: circle thats follows mousepoint
« Reply #3 on: Sep 29th, 2003, 9:23am » |
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It works just fine! But i want the circle to begin in the middle of the screen. Where it then follows the mousepointer.
Must it be done in a seperate function?
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toxi
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Re: circle thats follows mousepoint
« Reply #4 on: Sep 29th, 2003, 2:52pm » |
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this is how my version would look like, using the sin() function to modulate the circle's radius...
Code:float xpos,ypos;
float angle;
void setup() {
size(300,300);
xpos=width/2;
ypos=height/2;
noStroke();
smooth();
fill(203,90,70);
ellipseMode(CENTER_DIAMETER);
}
void loop() {
background(224);
xpos+=(mouseX-xpos)*0.1;
ypos+=(mouseY-ypos)*0.1;
angle+=0.05;
float radius=100+100*sin(angle);
ellipse(xpos,ypos,radius,radius);
} |
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http://toxi.co.uk/
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