畫出六角形的方法
void setup(){size(600,600);
}
void draw(){
background(255);
hexagon(200,200,80);
}
void hexagon(float x, float y, float r){
pushMatrix();
translate(x,y);
beginShape(POLYGON);
for(float angle = 0;angle<=PI*2;angle+=PI/3){
vertex(r*cos(angle),r*sin(angle));
}
endShape();
popMatrix();
}
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