Mercurial > mamba
changeset 223:c3018764942a
Move shift_head onto base segment so that head is less special (in preparation for snake disappearing down the exit).
| author | Simon Cross <hodgestar@gmail.com> |
|---|---|
| date | Wed, 14 Sep 2011 22:29:57 +0200 |
| parents | 321f2eef40e3 |
| children | 0dfa3f52742b |
| files | mamba/snake.py |
| diffstat | 1 files changed, 34 insertions(+), 34 deletions(-) [+] |
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--- a/mamba/snake.py Wed Sep 14 22:19:49 2011 +0200 +++ b/mamba/snake.py Wed Sep 14 22:29:57 2011 +0200 @@ -198,6 +198,40 @@ dx, dy = distance * dx, distance * dy self.rect = self.rect.move(dx, dy) + def shift_head(self, ds): + """Shift the head a number of pixels in the direction of it + orientation. + """ + dx, dy = self.orientation + TX, TY = TILE_SIZE + rx, ry = self.rect.left, self.rect.top + tx, ty = self.tile_pos + # WARNING: Tri-state logic ahead + # (Tri-state logic is the mamba's natural habitat) + if dx != 0: + newdx = rx + ds * dx + newtx = newdx / TX + if newtx > tx: + self.set_tile_pos((tx + 1, ty)) + ds = newdx - self.rect.left + return True, ds + elif newtx < tx - 1: + self.set_tile_pos((tx - 1, ty)) + ds = self.rect.left - newdx + return True, ds + else: + newdy = ry + ds * dy + newty = newdy / TY + if newty > ty: + self.set_tile_pos((tx, ty + 1)) + ds = newdy - self.rect.top + return True, ds + elif newty < ty - 1: + self.set_tile_pos((tx, ty - 1)) + ds = self.rect.top - newdy + return True, ds + return False, ds + class Head(Segment): CLOSED = "snake-head" @@ -239,40 +273,6 @@ self.mouth_close() self.tongue_in() - def shift_head(self, ds): - """Shift the head a number of pixels in the direction of it - orientation. - """ - dx, dy = self.orientation - TX, TY = TILE_SIZE - rx, ry = self.rect.left, self.rect.top - tx, ty = self.tile_pos - # WARNING: Tri-state logic ahead - # (Tri-state logic is the mamba's natural habitat) - if dx != 0: - newdx = rx + ds * dx - newtx = newdx / TX - if newtx > tx: - self.set_tile_pos((tx + 1, ty)) - ds = newdx - self.rect.left - return True, ds - elif newtx < tx - 1: - self.set_tile_pos((tx - 1, ty)) - ds = self.rect.left - newdx - return True, ds - else: - newdy = ry + ds * dy - newty = newdy / TY - if newty > ty: - self.set_tile_pos((tx, ty + 1)) - ds = newdy - self.rect.top - return True, ds - elif newty < ty - 1: - self.set_tile_pos((tx, ty - 1)) - ds = self.rect.top - newdy - return True, ds - return False, ds - class Body(Segment): def __init__(self, tile_pos):