public void render() {
// Draw a triangle rotated in the direction of velocity
float theta = vel.heading2D() + PApplet.radians(90);
fill(100);
stroke(0);
pushMatrix();
translate(loc.x, loc.y);
rotate(theta);
beginShape(PConstants.TRIANGLES);
vertex(0, -r * 2);
vertex(-r, r * 2);
vertex(r, r * 2);
endShape();
if (debug) {
stroke(50);
line(0, 0, 0, -sight);
}
popMatrix();
}