Fragments EvoSim2016 code

double val;
for(int i=0; i<hiddenLayer.getNodes().size(); i++) { // Propagate from input to hidden
    val = 0.0;
    for(int j=0; j<inputLayer.getNodes().size(); j++) {
        val += inputLayer.getNodes().get(j).getValue() * inputLayer.getNodes().get(j).getWeight(i);
    }
    if(Map.SIGMOID_VALS) val = sigmoid(val); // Hidden layer values go through sigmoid function
    else if(Map.NORMALIZE_VALS) {
        val /= inputLayer.getNodes().size() * Map.EVOLUTION_LIMIT;
    }
    hiddenLayer.getNodes().get(i).setValue(val);
}

// ...

switch(i) { // Act
case 0: // Increase red
    creature.setEnergy(creature.getEnergy()-ENERGY_USE_COL_CHANGE);
    r += random.nextInt(10)+20;
    if(r>CREATURE_MAX_RED) r=CREATURE_MAX_RED;
    creatureColor = new Color(r,g,b);
    creature.setColor(creatureColor);
    grid[x][y].setcolfg(creatureColor);
    break;
case 1: // Decrease red
    creature.setEnergy(creature.getEnergy()-ENERGY_USE_COL_CHANGE);
    r -= random.nextInt(10)+20;
    if(r<CREATURE_MIN_RED) r=CREATURE_MIN_RED;
    creatureColor = new Color(r,g,b);
    creature.setColor(creatureColor);
    grid[x][y].setcolfg(creatureColor);
    break;
// ...
case 6: // Turn left
    creature.setEnergy(creature.getEnergy()-ENERGY_USE_TURN);
    facing--;
    if(facing<0) facing = 3;
    creature.setFacing(facing);
    drawFacingArrow(x,y,facing);
    break;
case 7: // Turn right
    creature.setEnergy(creature.getEnergy()-ENERGY_USE_TURN);
    facing++;
    if(facing>3) facing = 0;
    creature.setFacing(facing);
    drawFacingArrow(x,y,facing);
    break;
// ...
case 9: // Eat
    creature.setEnergy(creature.getEnergy()-ENERGY_USE_EAT);
    int grass = grid[x][y].getcolbg().getGreen();
    creature.setEnergy(creature.getEnergy()+(ENERGY_GAIN_EAT*Math.min(grass,BITE_SIZE)));
    grass -= BITE_SIZE;
    if(grass<0) grass=0;
    grid[x][y].setcolbg(new Color(0,grass,0));
    break;
}