TestPatterns.pde

   1 /**
   2  * Simplest demonstration of using the rotating master hue.
   3  * All pixels are full-on the same color.
   4  */
   5 class TestHuePattern extends SCPattern {
   6   public TestHuePattern(GLucose glucose) {
   7     super(glucose);
   8   }
   9
  10   public void run(int deltaMs) {
  11     // Access the core master hue via this method call
  12     float hv = lx.getBaseHuef();
  13     for (int i = 0; i < colors.length; ++i) {
  14       colors[i] = color(hv, 100, 100);
  15     }
  16   }
  17 }
  18
  19 /**
  20  * Test of a wave moving across the X axis.
  21  */
  22 class TestXPattern extends SCPattern {
  23   private final SinLFO xPos = new SinLFO(0, model.xMax, 4000);
  24   public TestXPattern(GLucose glucose) {
  25     super(glucose);
  26     addModulator(xPos).trigger();
  27   }
  28   public void run(int deltaMs) {
  29     float hv = lx.getBaseHuef();
  30     for (Point p : model.points) {
  31       // This is a common technique for modulating brightness.
  32       // You can use abs() to determine the distance between two
  33       // values. The further away this point is from an exact
  34       // point, the more we decrease its brightness
  35       float bv = max(0, 100 - abs(p.fx - xPos.getValuef()));
  36       colors[p.index] = color(hv, 100, bv);
  37     }
  38   }
  39 }
  40
  41 /**
  42  * Test of a wave on the Y axis.
  43  */
  44 class TestYPattern extends SCPattern {
  45   private final SinLFO yPos = new SinLFO(0, model.yMax, 4000);
  46   public TestYPattern(GLucose glucose) {
  47     super(glucose);
  48     addModulator(yPos).trigger();
  49   }
  50   public void run(int deltaMs) {
  51     float hv = lx.getBaseHuef();
  52     for (Point p : model.points) {
  53       float bv = max(0, 100 - abs(p.fy - yPos.getValuef()));
  54       colors[p.index] = color(hv, 100, bv);
  55     }
  56   }
  57 }
  58
  59 /**
  60  * Test of a wave on the Z axis.
  61  */
  62 class TestZPattern extends SCPattern {
  63   private final SinLFO zPos = new SinLFO(0, model.zMax, 4000);
  64   public TestZPattern(GLucose glucose) {
  65     super(glucose);
  66     addModulator(zPos).trigger();
  67   }
  68   public void run(int deltaMs) {
  69     float hv = lx.getBaseHuef();
  70     for (Point p : model.points) {
  71       float bv = max(0, 100 - abs(p.fz - zPos.getValuef()));
  72       colors[p.index] = color(hv, 100, bv);
  73     }
  74   }
  75 }
  76
  77 /**
  78  * This is a demonstration of how to use the projection library. A projection
  79  * creates a mutation of the coordinates of all the points in the model, creating
  80  * virtual x,y,z coordinates. In effect, this is like virtually rotating the entire
  81  * art car. However, since in reality the car does not move, the result is that
  82  * it appears that the object we are drawing on the car is actually moving.
  83  *
  84  * Keep in mind that what we are creating a projection of is the view coordinates.
  85  * Depending on your intuition, some operations may feel backwards. For instance,
  86  * if you translate the view to the right, it will make it seem that the object
  87  * you are drawing has moved to the left. If you scale the view up 2x, objects
  88  * drawn with the same absolute values will seem to be half the size.
  89  *
  90  * If this feels counterintuitive at first, don't worry. Just remember that you
  91  * are moving the pixels, not the structure. We're dealing with a finite set
  92  * of sparse, non-uniformly spaced pixels. Mutating the structure would move
  93  * things to a space where there are no pixels in 99% of the cases.
  94  */
  95 class TestProjectionPattern extends SCPattern {
  96
  97   private final Projection projection;
  98   private final SawLFO angle = new SawLFO(0, TWO_PI, 9000);
  99   private final SinLFO yPos = new SinLFO(-20, 40, 5000);
 100
 101   public TestProjectionPattern(GLucose glucose) {
 102     super(glucose);
 103     projection = new Projection(model);
 104     addModulator(angle).trigger();
 105     addModulator(yPos).trigger();
 106   }
 107
 108   public void run(int deltaMs) {
 109     // For the same reasons described above, it may logically feel to you that
 110     // some of these operations are in reverse order. Again, just keep in mind that
 111     // the car itself is what's moving, not the object
 112     projection.reset(model)
 113
 114       // Translate so the center of the car is the origin, offset by yPos
 115       .translateCenter(0, yPos.getValuef(), 0)
 116
 117       // Rotate around the origin (now the center of the car) about an X-vector
 118       .rotate(angle.getValuef(), 1, 0, 0)
 119
 120       // Scale up the Y axis (objects will look smaller in that access)
 121       .scale(1, 1.5, 1);
 122
 123     float hv = lx.getBaseHuef();
 124     for (Coord c : projection) {
 125       float d = sqrt(c.x*c.x + c.y*c.y + c.z*c.z); // distance from origin
 126       // d = abs(d-60) + max(0, abs(c.z) - 20); // life saver / ring thing
 127       d = max(0, abs(c.y) - 10 + .3*abs(c.z) + .08*abs(c.x)); // plane / spear thing
 128       colors[c.index] = color(
 129         (hv + .6*abs(c.x) + abs(c.z)) % 360,
 130         100,
 131         constrain(140 - 10*d, 0, 100)
 132       );
 133     }
 134   }
 135 }