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src/preypredator/PreyPredator2.java
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initial import of...
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package preypredator;
import it.unimi.dsi.fastutil.ints.IntArrayList;
import java.io.IOException;
import java.util.Arrays;
import java.util.Random;
import org.perf4j.StopWatch;
import org.perf4j.slf4j.Slf4JStopWatch;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import mcmas.api.ContextType;
public class PreyPredator2 {
private final static Logger logger = LoggerFactory.getLogger(PreyPredator2.class);
private final StopWatch watch = new Slf4JStopWatch();
private final StopWatch runWatch = new Slf4JStopWatch();
//public static final int WIDTH = 1000;
//public static final int HEIGHT = 1000;
public static final int GRASS_MIN = 0;
public static final int GRASS_MAX = 100;
public static final int GRASS_ORIG = 20;
public static final float GRASS_FACT = 1.0f;
public static final int GRASS_GROWTH = 10;
public static final int PREY_ORIG = 10;
//public static final int PREY_RADIUS = 20;
public static final int PREY_MAX = 50;
public static final int PRED_ORIG = 10;
//public static final int PRED_RADIUS = 20;
public static final int PRED_MAX = 100;
// Attributes
private final PPGrid grass;
private final PPGrid preys;
private final PPGrid preds;
// Temporary buffers used in each step
private final IntArrayList preysX;
private final IntArrayList preysY;
private final IntArrayList predsX;
private final IntArrayList predsY;
private final int nbPreds;
private final int nbPreys;
private final int range;
private final PPRuntime runtime;
//OCLChrono chrono = new OCLChrono("preypredator");
private final int size;
public PreyPredator2(int size, int nbPreys, int nbPredators, int range, PPRuntime runtime) {
this.grass = new PPGrid(size, size);
this.preys = new PPGrid(size, size);
this.preds = new PPGrid(size, size);
this.size = size;
this.nbPreds = nbPredators;
this.nbPreys = nbPreys;
this.range = range;
this.preysX = new IntArrayList();
this.preysY = new IntArrayList();
this.predsX = new IntArrayList();
this.predsY = new IntArrayList();
this.runtime = runtime;
}
public void setup() {
watch.start("pp_setup");
initGrid(grass.getStorage(), (int) (grass.getStorage().length * 0.8), GRASS_ORIG);
initGrid(preys.getStorage(), nbPreys, PREY_ORIG);
initGrid(preds.getStorage(), nbPreds, PRED_ORIG);
watch.stop();
}
public void update_positions() {
//chrono.start("update_positions");
preysX.clear();
preysY.clear();
predsX.clear();
predsY.clear();
for (int j = 0; j < size; j++) {
for (int i = 0; i < size; i++) {
if (preys.get(i, j) > 0) {
preysX.add(i);
preysY.add(j);
}
if (preds.get(i, j) > 0) {
predsX.add(i);
predsY.add(j);
}
}
}
//System.out.println(chrono.stop());
}
public void step() {
watch.start("pp_step");
//OCLChrono stepChrono = new OCLChrono("step");
//stepChrono.start();
update_positions();
runWatch.start("pp_grass");
runtime.growGrass(grass, GRASS_FACT, GRASS_GROWTH, GRASS_MIN, GRASS_MAX);
runWatch.stop();
int[] newPreysX = new int[preysX.size()];
int[] newPreysY = new int[preysY.size()];
int[] newPredsX = new int[predsX.size()];
int[] newPredsY = new int[predsY.size()];
runWatch.start("pp_move_preys");
if (preysX.size() > 0) {
runtime.selectMaxTarget(grass, range,
preysX.toIntArray(), preysY.toIntArray(),
newPreysX, newPreysY);
}
runWatch.stop();
/*
for (int i = 0; i < preysX.size(); i++) {
System.out.println("Prey: (" + preysX.get(i) + ", " + preysY.get(i) + ") => (" +
newPreysX[i] + ", " + newPreysY[i] + ")");
}*/
// PREYS
for (int i = 0; i < preysX.size(); i++) {
final int oldPos = preys.offset(preysX.get(i), preysY.get(i));
final int newPos = preys.offset(newPreysX[i], newPreysY[i]);
// Check an eventual conflict with another prey
if (preys.get(newPos) > 0) {
continue;
}
// Movement
preys.set(newPos, preys.get(oldPos));
preys.set(oldPos, 0);
// Eating
if (grass.get(newPos) >= 0) {
preys.set(newPos, clamp(preys.get(newPos) + grass.get(newPos), 0, PREY_MAX));
grass.set(newPos, 0);
}
// Reproduction
if (preys.get(newPos) == PREY_MAX) {
preys.set(oldPos, PREY_ORIG);
}
}
runWatch.start("pp_move_preds");
if (predsX.size() > 0) {
int [] predsXbis = predsX.toIntArray();
int [] predsYbis = predsY.toIntArray();
runtime.selectMaxTarget(preys, (int) Math.round(range * 1.5),
predsXbis, predsYbis,
newPredsX, newPredsY);
}
runWatch.stop();
/*for (int i = 0; i < predsX.size(); i++) {
System.out.println("Pred: (" + predsX.get(i) + ", " + predsY.get(i) + ") => (" +
newPredsX[i] + ", " + newPredsY[i] + ")");
}*/
// PREDATOR
for (int i = 0; i < predsX.size(); i++) {
final int pos = predsY.get(i) * size + predsX.get(i);
final int newPos = newPredsY[i] * size + newPredsX[i];
// Check an eventual conflict with another predator
if (preds.get(newPos) > 0) {
continue;
}
// Movement
preds.set(newPos, preds.get(pos));
preds.set(pos, 0);
// Eating
if (preys.get(newPos) >= 0) {
preds.set(newPos, clamp(preds.get(newPos) + preys.get(newPos), 0, PRED_MAX));
preys.set(newPos, 0);
}
// Reproduction
if (preds.get(newPos) == PRED_MAX) {
preds.set(pos, PRED_ORIG);
}
}
/*System.out.println(grass);
System.out.println(preys);*/
//System.out.println(preds);
//logger.info(stepChrono.stop().toString());
watch.stop();
}
private void initGrid(int[] grid, int nbCells, int value) {
int remainingCells = nbCells;
Random rng = new Random();
while (remainingCells > 0) {
final int pos = rng.nextInt(grid.length);
if (grid[pos] == 0) {
grid[pos] = value;
remainingCells--;
}
}
}
// Helpers
private int clamp(int value, int min, int max) {
return Math.max(min, Math.min(value, max));
}
public static void main(String[] args) {
OptionParser parser = new OptionParser();
parser.acceptsAll(Arrays.asList("g", "gpu"), "Enable GPU context")
.withOptionalArg().ofType(Boolean.class).defaultsTo(true);
parser.acceptsAll(Arrays.asList("h", "help"), "Print this help");
parser.accepts("size", "Size of the grid (side)").withRequiredArg()
.ofType(Integer.class).defaultsTo(1000);
parser.accepts("preys", "Number of Preys to use").withRequiredArg()
.ofType(Integer.class).defaultsTo(10000);
parser.accepts("preds", "Number of Predators to use").withRequiredArg()
.ofType(Integer.class).defaultsTo(5000);
parser.accepts("range", "Range to use for preys (x 1.5 for predators)").withRequiredArg()
.ofType(Integer.class).defaultsTo(100);
OptionSet options = parser.parse(args);
if (options.has("help")) {
try {
parser.printHelpOn(System.out);
return;
} catch (IOException e) {
System.err.println("Failed to print help to standard output");
e.printStackTrace();
}
}
PPRuntime runtime;
if ((Boolean) (options.valueOf("gpu"))) {
logger.info("Use GPU Runtime");
runtime = new PPRuntimeGPU(ContextType.ALL);
} else {
logger.info("Use CPU Runtime");
runtime = new PPRuntimeCPU();
}
int size = (Integer) options.valueOf("size");
int nbPreys = (Integer) options.valueOf("preys");
int nbPreds = (Integer) options.valueOf("preds");
int range = (Integer) options.valueOf("range");
logger.info(
"size: " + size + ", nbPreys: " + nbPreys + ", nbPreds: " + nbPreds + ", range: " + range
);
//PPRuntime runtime = new PPRuntimeGPU(ContextType.ALL);
//PPRuntime runtime = new PPRuntimeCPU();
PreyPredator2 simulation = new PreyPredator2(size, nbPreys, nbPreds, range, runtime);
simulation.setup();
for (int i = 0; i < 50; i++) {
simulation.step();
}
}
}
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