Processing: Creative Coding and Computational Art

PROCESSING: CREATIVE CODING AND COMPUTATIONAL ART
502
Figure 11-10. Ravenous Ellipse II sketch
Now the predatory motion is smoother and much more natural. And all I added were the
two easing statements (besides of course declaring the easing variable at the top of the
sketch):
// cause the predator to decelerate
deltaX *= easing;
deltaY *= easing;
Let’s replace the ravenous ellipse with an even more ravenous triangle (shown in
Figure 11-11). The triangle will not only follow the mouse, but remain oriented in a certain
direction so that it can attack with its mouth (you’ll have to take my word that this triangle
does indeed have a mouth). I’ll create the triangle and its orientation using some trig.
// Ravenous Triangle I
float predCntrX, predCntrY;
float predX[] = new float[3];
float predY[] = new float[3];
float predLen = 8.0;
float predAng, predRot;
float easing = .05;