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Topic: circle segments (Read 377 times) |
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_C
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circle segments
« on: Dec 16th, 2004, 3:07am » |
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problem is that im searching for a simple method to create cicle segments, like this scipt does.
problem is that only polygons, three-sided forms will
be filled, however, i didnt manage that till now.
someone did that already? thanks for any hints
c
Code:
Segment s_1, s_2;
float u,v;
void setup() {
ellipseMode(CENTER_DIAMETER);
size(800, 500);
background(155);
stroke(0, 237,235);
v=0;
s_1 = new Segment(60, 80, 0, v, color(0,0, 200));
s_2 = new Segment(80, 100, 0, v, color(0,200,0));
}
void loop() {
clear();
if( radians(mouseY)-PI/2>radians(360)-PI/2 ) {
u = radians(360)-PI/2;
} else u = radians(mouseY)-PI/2;
if( radians(mouseX)-PI/2>radians(360)-PI/2 ) {
v = radians(360)-PI/2;
} else v = radians(mouseX)-PI/2;
s_1.wEnd = u;
s_2.wEnd = v;
s_2.draw();
s_1.draw();
}
class Segment {
// int value of inner and outer radius;
int iRadius, aRadius;
// degree values of the start and end point of the segment;
float wStart, wEnd;
color clr;
Segment(int iR, int aR, float wS, float wE, color c) {
iRadius = iR; aRadius = aR; wStart = radians(wS)-PI/2; wEnd = radians(wE)-PI/2;
clr = c;
}
void update() {
}
void drawSegment() {
stroke(clr);
//start stroke of segment
beginShape(LINE_STRIP);
//first line
vertex( cos(wStart)*iRadius, sin(wStart)*iRadius );
vertex( cos(wStart)*aRadius, sin(wStart)*aRadius );
endShape();
//outer bow
beginShape(LINE_STRIP);
curveVertex( cos(wStart)*aRadius, sin(wStart)*aRadius );
for(float i=0; i<1; i+=0.05) {
curveVertex( cos( wStart+(wEnd-wStart)*i )*aRadius, sin( wStart+(wEnd-wStart)*i )*aRadius );
}
curveVertex( cos(wEnd)*aRadius, sin(wEnd)*aRadius );
curveVertex( cos(wEnd)*aRadius, sin(wEnd)*aRadius );
endShape();
//second line
beginShape(LINE_STRIP);
vertex( cos(wEnd)*aRadius, sin(wEnd)*aRadius );
vertex( cos(wEnd)*iRadius, sin(wEnd)*iRadius );
endShape();
//inner bow
beginShape(LINE_STRIP);
curveVertex( cos(wEnd)*iRadius, sin(wEnd)*iRadius );
for(float i=1; i>0; i-=0.05) {
curveVertex( cos( wStart+(wEnd-wStart)*i )*iRadius, sin( wStart+(wEnd-wStart)*i )*iRadius );
}
curveVertex( cos(wStart)*iRadius, sin(wStart)*iRadius );
curveVertex( cos(wStart)*iRadius, sin(wStart)*iRadius );
endShape();
}
void drawOutlines() {
stroke(200,200, 200,77);
noFill();
ellipse(0,0, iRadius*2, iRadius*2);
ellipse(0,0, aRadius*2, aRadius*2);
}
void draw() {
push();
translate(width/2, height/2, 0);
drawOutlines();
drawSegment();
pop();
}
}
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flight404
 
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Re: circle segments
« Reply #1 on: Dec 16th, 2004, 3:14am » |
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Not exactly sure what you are asking for, but does this help any?
http://www.toxi.co.uk/p5/segments/
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_C
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Re: circle segments
« Reply #2 on: Dec 16th, 2004, 5:50pm » |
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thanks, man. i think i can use this as a codebase
for a segmentclass. just trying to find
a good solution that draws them clear enough...
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