@Override
public void apply(Mountain mountain, Set<RayPoint> dst) {
if (mountain.rays == null) return;
for (Ray ray : mountain.rays) {
for (RayPoint point : ray.points) {
if (!point.hasNativeHeight()) dst.add(point);
}
}
}
public void cast() {
int screenWidth = currentGame.getScreen().getResolutionX();
columns.clear();
mapPoints.clear();
double FOV = currentGame.getCamera().getFOV();
double playerAngle = currentGame.getCamera().getAngle();
double startingAngle = playerAngle + FOV / 2;
double increment = FOV / screenWidth;
double currentAngle = startingAngle;
double maxX = currentGame.getWorld().getWidth() - 1;
double maxY = currentGame.getWorld().getHeight() - 1;
RayPoint playerPoint = currentGame.getPlayer().getPosition();
double playerY = playerPoint.getY();
double playerX = playerPoint.getX();
for (int i = 0; i < screenWidth; ++i, currentAngle -= increment) {
double fisheye = Math.cos(Math.abs(currentAngle - playerAngle));
currentAngle = RayPoint.validateAngle(currentAngle);
boolean posDirX = (currentAngle < Math.PI / 2) || (currentAngle > (Math.PI * (3.0 / 2.0)));
boolean posDirY = currentAngle > Math.PI;
double startX, startY, deltaX, deltaY, distFromPlayerX, distFromPlayerY;
// checking horizontally
if (posDirY) {
startY = (int) playerY + 1;
deltaY = 1;
} else {
startY = (int) playerY;
deltaY = -1;
}
distFromPlayerY = Math.abs(startY - playerY);
distFromPlayerX = Math.abs((distFromPlayerY / Math.tan(currentAngle)));
if (posDirX) {
startX = playerX + distFromPlayerX;
deltaX = Math.abs(deltaY / Math.tan(currentAngle));
} else {
startX = playerX - distFromPlayerX;
deltaX = -Math.abs(deltaY / Math.tan(currentAngle));
}
boolean hit = false;
double currentX = startX;
double currentY = startY;
double checkX = currentX;
double checkY = currentY;
double insideCheckX = 0, insideCheckY = 0;
ArrayList<Double> allHits = new ArrayList<Double>();
ArrayList<Point> allPoints = new ArrayList<Point>();
double checkingDistance;
while (!hit) {
checkX = currentX;
if (posDirY) {
insideCheckY = -1;
checkY = (int) currentY;
} else {
insideCheckY = 1;
checkY = (int) currentY - 1;
}
if (checkX > maxX || checkY > maxY || checkX < 0 || checkY < 0) {
hit = true;
} else if (RayPoint.distanceTo(playerX, playerY, currentX, currentY) > viewRange) {
hit = true;
} else {
if (!currentGame
.getWorld()
.getTileAt(checkX, checkY + insideCheckY)
.getColor()
.equals(Color.WHITE)) {
checkingDistance = RayPoint.distanceTo(playerX, playerY, currentX, currentY) * fisheye;
// TODO: mess around with Double.MIN_VALUE
if (checkingDistance
< 0.00001) // super arbitrary. please don't hate me, hate floating point numbers
checkingDistance = 0;
int index = insertAllHits(checkingDistance, allHits);
allHits.add(index, checkingDistance);
allPoints.add(index, new Point((int) checkX, (int) (checkY + insideCheckY)));
}
if (!currentGame.getWorld().getTileAt(checkX, checkY).getColor().equals(Color.WHITE)) {
checkingDistance = RayPoint.distanceTo(playerX, playerY, currentX, currentY) * fisheye;
if (checkingDistance
< 0.00001) // super arbitrary. please don't hate me, hate floating point numbers
checkingDistance = 0;
int index = insertAllHits(checkingDistance, allHits);
allHits.add(index, checkingDistance);
allPoints.add(index, new Point((int) checkX, (int) checkY));
}
}
currentX += deltaX;
currentY += deltaY;
}
// checking vertically
if (posDirX) {
startX = (int) playerX + 1;
deltaX = 1;
} else {
startX = (int) playerX;
deltaX = -1;
}
distFromPlayerX = Math.abs(startX - playerX);
distFromPlayerY = Math.abs(distFromPlayerX * Math.tan(currentAngle));
if (posDirY) {
startY = playerY + distFromPlayerY;
deltaY = Math.abs(Math.tan(currentAngle) * (deltaX));
} else {
startY = playerY - distFromPlayerY;
deltaY = -Math.abs(Math.tan(currentAngle) * (deltaX));
}
hit = false;
currentX = startX;
currentY = startY;
insideCheckX = 0;
insideCheckY = 0;
while (!hit) {
checkY = currentY;
if (posDirX) {
insideCheckX = -1;
checkX = (int) currentX;
} else {
insideCheckX = 1;
checkX = (int) currentX - 1;
}
if (checkX > maxX || checkY > maxY || checkX < 0 || checkY < 0) {
hit = true;
} else if (RayPoint.distanceTo(playerX, playerY, currentX, currentY) > viewRange) {
hit = true;
} else {
if (!currentGame
.getWorld()
.getTileAt(checkX + insideCheckX, checkY)
.getColor()
.equals(Color.WHITE)) {
checkingDistance = RayPoint.distanceTo(playerX, playerY, currentX, currentY) * fisheye;
if (checkingDistance
< 0.00001) // super arbitrary. please don't hate me, hate floating point numbers
checkingDistance = 0;
int index = insertAllHits(checkingDistance, allHits);
allHits.add(index, checkingDistance);
allPoints.add(index, new Point((int) (checkX + insideCheckX), (int) checkY));
}
if (!currentGame.getWorld().getTileAt(checkX, checkY).getColor().equals(Color.WHITE)) {
checkingDistance = RayPoint.distanceTo(playerX, playerY, currentX, currentY) * fisheye;
if (checkingDistance
< 0.00001) // super arbitrary. please don't hate me, hate floating point numbers
checkingDistance = 0;
int index = insertAllHits(checkingDistance, allHits);
allHits.add(index, checkingDistance);
allPoints.add(index, new Point((int) checkX, (int) checkY));
}
}
currentX += deltaX;
currentY += deltaY;
}
allHits.add(0.0);
allPoints.add(new Point((int) playerPoint.getX(), (int) playerPoint.getY()));
if (!allHits.isEmpty()) {
columns.add(allHits);
mapPoints.add(allPoints);
// System.out.println(i + " = " + allPoints);
// System.out.println(allPoints);
} else { // adding dummy values to the lists if empty
ArrayList<Double> NaNList = new ArrayList<Double>();
NaNList.add(Double.NaN);
ArrayList<Color> whiteList = new ArrayList<Color>();
whiteList.add(Color.WHITE);
ArrayList<Point> pointLess = new ArrayList<Point>();
pointLess.add(new Point(0, 0));
columns.add(NaNList);
mapPoints.add(pointLess);
}
}
}
