/**
* Returns the sum of the red, green, and blue components of all the pixels of an image within a
* region.
*
* <p>If the region extends outside the bounds of the image, each pixel outside the bounds of the
* image is considered to have a value of zero.
*
* @param image the image to sum. This must not be null.
* @param region The region of the image to sum pixels from. This must not be null.
* @return The sum of components
*/
private static long brightnessSum(Image image, Rectangle region) {
final PixelReader reader = image.getPixelReader();
long sum = 0;
for (int y = region.y; y < region.y + region.height + 1; y++) {
for (int x = region.x; x < region.x + region.width + 1; x++) {
if (x >= 0 && x < image.getWidth() && y >= 0 && y < image.getHeight()) {
int argb = reader.getArgb(x, y);
// Sum the red, green, and blue components to get a value
// between 0 and 765
long brightness = ((argb >> 16) & 0xFF) + ((argb >> 8) & 0xFF) + (argb & 0xFF);
sum += brightness;
}
}
}
return sum;
}
private static void setRGBMatrix() {
int height = (int) image.getHeight();
int width = (int) image.getWidth();
imgR = new double[width][height];
imgG = new double[width][height];
imgB = new double[width][height];
PixelReader reader = image.getPixelReader();
for (int readY = 0; readY < height; readY++) {
for (int readX = 0; readX < width; readX++) {
Color color = reader.getColor(readX, readY);
imgG[readX][readY] = color.getGreen();
imgB[readX][readY] = color.getBlue();
imgR[readX][readY] = color.getRed();
}
}
}
/**
* Do a low level pixel perfect hit test.
*
* @param x The x coordinate to test, relative to the origin of this animation's tile
* @param y The y coordinate to test, relative to the origin of this animation's tile
* @param frame The frame to hit test on
* @param angle The angle of the camera
* @param direction The direction the sprite is facing
* @return true if the hit test passes.
*/
public boolean hitTest(int x, int y0, int frame, CameraAngle angle, FacingDirection direction) {
int y = y0 + h - ((int) GlobalConstants.TILEH);
if (x < 0 || x >= w || y < 0 || y >= h) return false;
int rotation = direction.transform(angle);
int xt = (int) ((double) (x + (frame * GlobalConstants.TILEW)) / sf);
int yt = (int) ((double) (y + (rotation * h)) / sf);
return hitTester.getColor(xt, yt).isOpaque();
}
