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Sunday, May 31, 2009

Recursion4

int sides = 7;
int maxDepth = 3;
float angle = radians(360/sides);
float angle2 = angle/2;
float sz = 48;

void setup()
{
    size(600, 600);
    noStroke();
    fill(0,0,0,3);

    int x = width/2;
    int y = height/2;
    translate(x,y);
    beginShape(TRIANGLES);
    drawShape(0,1);
    endShape();
}

void drawShape(int depth, int dir)
{
    for(int i = 0; i < sides ; i++)
    {
        vertex(0,0);
        vertex(sin(-angle2)*sz,cos(-angle2)*sz);
        vertex(sin(angle2)*sz,cos(angle2)*sz);

        pushMatrix();
        if (depth < maxDepth)
        {
            float sc = 1.0;
            float d = sz * sc * sin(angle2);
            translate(0,(sz + d) * dir);
            scale(sc, sc);
            rotate(PI);
            drawShape(depth + 1, dir * -1);
        }
        popMatrix();
        rotate(angle);
    }
}