Pixel perfect detection during animations

[earlwood]

Does pixel perfect detection work while a character is animating? Say the character had an animation where he flung out a sword and if the player touched him, he would die, would PP detection apply to an animating character?

[Scorpiorus]

Yes, if pixel-perfect click detection is turned on.

[Kweepa]

Pixel perfect detection only works on a point.
I can't think of anything other than a brute force test like this:

Code: ags

#define MAXW 32 // this should be even
#define MAXH 64

// returns 1 if touching, 0 if not
// only works if no other characters are also overlapping
// if there are any, turn them off first
// both characters should have "No Interaction" unchecked
// untested for objects or GUI elements in front of the characters

function AreCharactersTouchingPP(int charA, int charB) {

  // do a bounding box check first
  int dx = character[charA].x - character[charB].x;
  int dy = character[charA].y - character[charB].x;
  if (dx*dx > MAXW*MAXW || dy*dy > MAXH*MAXH) return 0;

  // find the overlapping part
  int leftX = character[charA].x;
  int rightX = character[charB].x;
  if (dx < 0) {
    // swap
    leftX = rightX;
    rightX = character[charA].x;
  }
  int topY = character[charA].y;
  int bottomY = character[charB].y;
  if (dy < 0) {
    // swap
    topY = bottomY;
    bottomY = character[charA].y;
  }

  // convert room coordinates to screen coordinates
  leftX = leftX - GetViewportX();
  rightX = rightX - GetViewportX();
  topY = topY - GetViewportY();
  bottomY = bottomY - GetViewportY();

  // iterate over the overlapping part
  int touch = 0;
  int thisRoom = character[charA].room;
  int x = leftX - MAXW/2;
  while (x <= rightX + MAXW/2) {
    int y = topY - MAXH;
    while (y <= bottomY) {
      int frontChar = GetCharacterAt(x, y);
      int backChar = charA;
      if (frontChar == charA || frontChar == charB) {
        if (frontChar == charA) backChar = charB;
        // hide the front character
        character[frontChar].room = 999;
        if (GetCharacterAt(x, y) == backChar) {
          character[frontChar].room = thisRoom;
          return 1;
        }
        // restore the front character
        character[frontChar].room = thisRoom;
      }
      y++;
    }
    x++;
  }

  return 0;
}