Drawing an "arrow".

Programming Questions

miasma

in Programming Questions • 2 years ago

Hello,

I want to draw a clockwise arrow to show the direction in which a Sunburst view is drawn (clockwise). Should be pretty simple with arc, but then the orthogonal lines which form the arrow at the top might be a little bit tricky. Has someone maybe some example code?

It should start at about x = 3/4 of the width of the frame and at y = 0.

regards,
Johannes

Replies(1)

quarks

Re: Drawing an "arrow".

2 years ago

This will draw an arrow from any position, of any length and at any angle.

void setup(){
size(400,400);
}
void draw(){
background(255);
strokeWeight(2);
stroke(255,0,0);
drawArrow(100,100,120,10);
stroke(0,255,0);
drawArrow(100,160,50,130);
stroke(0,0,255);
drawArrow(300,300,170,290);
}
void drawArrow(int cx, int cy, int len, float angle){
pushMatrix();
translate(cx, cy);
rotate(radians(angle));
line(0,0,len, 0);
line(len, 0, len - 8, -8);
line(len, 0, len - 8, 8);
popMatrix();
}

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Drawing an "arrow".

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Re: Drawing an "arrow".

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