Processing: Creative Coding and Computational Art

Figure 11-22. Non-orthogonal Collision with Multiple Ground Segments
sketch
Stage 3: Asteroid shower
In the final stage of the sketch, shown in Figure 11-23, I’ll add multiple orbs to the segmented
ground plane. In addition, in the hope of creating something a little more visually
interesting, I’ll convert the flat, undulating ground plane to a curved, undulating planet,
and I’ll attach an image map to the geometry. I’ll also add inspirational twinkling stars and
some fiery colors to the asteroid shower.
As with stage 2, the Ground, Orb, and Vect2D classes remain unchanged. You just need to
edit the code in the main tab and add some parameters to the checkGroundCollision()
and checkWallCollision() functions. Following is the main tab code (note that, since the
majority of the following code is different from the last sketch, I didn’t put the changes in
bold):
/*******************************************
* Asteroid Shower
* Non-orthogonal Collision with
* Multiple Ground Segments and
* Multiple Orbs
*******************************************
* Based on Keith Peters's Solution in
* Foundation ActionScript Animation:
MOTION
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