Spacheships.pde

import ch.bildspur.postfx.builder.*;
import ch.bildspur.postfx.pass.*;
import ch.bildspur.postfx.*;
PostFX fx;


final int EMPTY = 0;
final int CELL = 1;
final int DECAY = 2;
final int RELAPSE = 3;

final int[] colors = {
  #000000,
  #EEFFEE,
  #7F887F,
  #222255
};

int PLAYFIELD_SIZE = 200;
int[][] playfield = new int[PLAYFIELD_SIZE][PLAYFIELD_SIZE];
int[] neighborhood = {-1, 0, 1};
int countInNeighborhood(int x, int y, int[][] playfield, int value) {
  int res = 0;
  for (int i : neighborhood) {
    for (int j : neighborhood) {
      if (x+i < 0 || x+i >= PLAYFIELD_SIZE || y+j < 0 || y+j >= PLAYFIELD_SIZE) continue;
      if (playfield[x+i][y+j] == value) res++;
    }
  }
  return res;
}

void drawCell(int x, int y, int value) {
  noStroke();
  fill(colors[value]);
  rect(x, y, 1, 1);
}

void evaluateCell(int x, int y, int[][] playfield, int[][] nextField) {
  switch(playfield[x][y]) {
    case EMPTY:
      if (countInNeighborhood(x, y, playfield, CELL) > 1
        && countInNeighborhood(x, y, playfield, CELL) < 4) {
        nextField[x][y] = CELL;
      }
      break;
    case CELL:
      if (countInNeighborhood(x, y, playfield, CELL) > 3
        && countInNeighborhood(x, y, playfield, CELL) < 5) {
        nextField[x][y] = CELL;
      } else {
        nextField[x][y] = DECAY;
      }
      break;
    case DECAY:
      if (countInNeighborhood(x, y, playfield, CELL) > 3) {
        nextField[x][y] = DECAY;
      } else {
        nextField[x][y] = RELAPSE;
      }
      break;
  }
}

void setup() {
  size(1080, 1080, P3D);
  for (int i = 0; i < PLAYFIELD_SIZE; i++) {
    for (int j = 0; j < PLAYFIELD_SIZE; j++) {
      playfield[i][j] = EMPTY;
    }
  }
  int cx, cy;
  cx = PLAYFIELD_SIZE/2;
  cy = PLAYFIELD_SIZE/2;
  playfield[cx][cy] = CELL;
  playfield[cx-1][cy] = CELL;
  playfield[cx+1][cy] = CELL;
  //playfield[cx][cy-1] = CELL;
  frameRate(30);
  fx = new PostFX(this);
}
  
void step() {
  int[][] next = new int[PLAYFIELD_SIZE][PLAYFIELD_SIZE];
  for (int i = 0; i < PLAYFIELD_SIZE; i++) {
    for (int j = 0; j < PLAYFIELD_SIZE; j++) {
      evaluateCell(i, j, playfield, next);
    }
  }
  playfield = next;
}

void keyPressed() {
  step();
}

void draw() {
  step();
  clear();
  scale(((float)width)/PLAYFIELD_SIZE, ((float)height)/PLAYFIELD_SIZE);
  for (int i = 0; i < PLAYFIELD_SIZE; i++) {
    for (int j = 0; j < PLAYFIELD_SIZE; j++) {
      drawCell(i, j, playfield[i][j]);
    }
  }
  fx.render()
    .blur(4, 0.5)
    .pixelate(PLAYFIELD_SIZE*2)
    .bloom(0.1, 5, 0.5)
    .rgbSplit(20)
    .compose();
  saveFrame("ships/####.tiff");
}