src/pgu/hexvid.py

   1 """Hexagonal tile engine.
   2
   3 <p>Note -- this engine is not finished.  Sprites are not supported.  It
   4 can still be useful for using the level editor, and for rendering hex
   5 terrains, however.  If you are able to update it and use it in a real game,
   6 help would be greatly appreciated!</p>
   7
   8 <p>please note that this file is alpha, and is subject to modification in
   9 future versions of pgu!</p>
  10
  11 """
  12 print 'pgu.hexvid','This module is alpha, and is subject to change.'
  13
  14 from pgu.vid import *
  15 import pygame
  16
  17
  18 class Hexvid(Vid):
  19     """Create an hex vid engine.  See [[vid]]"""
  20     def update(self,screen):
  21         return self.paint(screen)
  22
  23     def paint(self,screen):
  24         sw,sh = screen.get_width(),screen.get_height()
  25         self.view.w,self.view.h = sw,sh
  26
  27         tlayer = self.tlayer
  28         blayer = self.blayer
  29         #zlayer = self.zlayer
  30         w,h = len(tlayer[0]),len(tlayer)
  31
  32         #iso_w,iso_h,iso_z,tile_w,tile_h,base_w,base_h = self.iso_w,self.iso_h,self.iso_z,self.tile_w,self.tile_h,self.base_w,self.base_h
  33
  34         tile_w,tile_h = self.tile_w,self.tile_h
  35         tile_w2,tile_h2 = tile_w/2,tile_h/2
  36
  37         view = self.view
  38         adj = self.adj = pygame.Rect(-self.view.x,-self.view.y,0,0)
  39
  40         w,h = len(tlayer[0]),len(tlayer)
  41         tiles = self.tiles
  42
  43         #""
  44         if self.bounds == None:
  45             tmp,y1 = self.tile_to_view((0,0))
  46             x1,tmp = self.tile_to_view((0,h+1))
  47             tmp,y2 = self.tile_to_view((w+1,h+1))
  48             x2,tmp = self.tile_to_view((w+1,0))
  49             self.bounds = pygame.Rect(x1,y1,x2-x1,y2-y1)
  50             print self.bounds
  51         #""
  52
  53         if self.bounds != None: self.view.clamp_ip(self.bounds)
  54
  55         ox,oy = self.screen_to_tile((0,0))
  56         sx,sy = self.tile_to_view((ox,oy))
  57         dx,dy = sx - self.view.x,sy - self.view.y
  58
  59         bot = 1
  60
  61         tile_wi = tile_w + tile_w/2
  62         tile_wi2 = tile_wi/2
  63
  64         #dx += tile_w/2
  65
  66         for i2 in xrange(-bot,self.view.h/tile_h2+bot*3): #NOTE: 3 seems a bit much, but it works.
  67             tx,ty = ox + i2/2 + i2%2,oy + i2/2
  68             x,y = (i2%2)*tile_wi2 + dx,i2*tile_h2 + dy
  69
  70             #to adjust for the -1 in i1
  71             x,tx,ty = x-tile_wi,tx-1,ty+1
  72
  73             x -= tile_w/2
  74             for i1 in xrange(-1,self.view.w/tile_wi+1):
  75                 if ty >= 0 and ty < h and tx >= 0 and tx < w:
  76                     if blayer != None:
  77                         n = blayer[ty][tx]
  78                         if n != 0:
  79                             t = tiles[n]
  80                             if t != None and t.image != None:
  81                                 screen.blit(t.image,(x,y))
  82                     n = tlayer[ty][tx]
  83                     if n != 0:
  84                         t = tiles[n]
  85                         if t != None and t.image != None:
  86                             screen.blit(t.image,(x,y))
  87
  88
  89                 tx += 1
  90                 ty -= 1
  91                 x += tile_wi
  92
  93         return [pygame.Rect(0,0,screen.get_width(),screen.get_height())]
  94
  95     def view_to_tile(self,pos):
  96         x,y = pos
  97         #x = x + (self.tile_w*1/2)
  98
  99         x,y = int(x*4/(self.tile_w*3)), y*2/self.tile_h
 100         nx = (x + y) / 2
 101         ny = (y - x) / 2
 102         return nx,ny
 103
 104     def tile_to_view(self,pos):
 105         x,y = pos
 106         nx = x - y
 107         ny = x + y
 108         nx,ny = int(nx*(self.tile_w*3)/4), ny*self.tile_h/2
 109
 110         #nx = nx - (self.tile_w*1/2)
 111         return nx,ny
 112
 113     def screen_to_tile(self,pos): #NOTE HACK : not sure if the 3/8 is right or not, but it is pretty close...
 114         pos = pos[0]+self.view.x + self.tile_w*3/8,pos[1]+self.view.y
 115         pos = self.view_to_tile(pos)
 116         return pos
 117
 118     def tile_to_screen(self,pos):
 119         pos = self.tile_to_view(pos)
 120         pos = pos[0]-self.view.x,pos[1]-self.view.y
 121         return pos
 122
 123
 124     def tga_load_tiles(self,fname,size,tdata={}):
 125         Vid.tga_load_tiles(self,fname,size,tdata)
 126
 127         self.tile_w,self.tile_h = size