view orpg/mapper/isometric.py @ 105:2f2bebe9c77f alpha

Traipse Alpha 'OpenRPG' {091006-03} Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc's main goal is to offer more advanced features and enhance the productivity of the user. Update Summary: 00: Adds Bookmarks (Alpha) with cool Smiley Star and Plus Symbol images! 01: Forgot the default_server_bookmarks.xml; added. 02: Bookmarks working with no errors now! Sweet! 03: Changes made to the map for increased portability. SnowDog has changes planned in Core, though. Added an initial push to the BCG. Not much to see, just shows off how it is re-writing Main code.
author sirebral
date Tue, 06 Oct 2009 22:16:34 -0500
parents 4385a7d0efd1
children
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# Copyright (C) 2000-2001 The OpenRPG Project
#
#    openrpg-dev@lists.sourceforge.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
# --
#
# File: mapper/isometric.py
# Author: Todd Faris (Snowdog)
# Maintainer:
# Version:
#
# Description:
#   helper class definition for drawing and line collision within an isometric grid
#   based on a interger based coordinate system where X increase to the right
#   and Y increases in the downward direction


class IsoGrid:
    def __init__(self,width):
        self.ratio = 2.0
        self.width = width
        self.height = 0
        self.CalcRatio()
        self.center_x = 0
        self.center_y = 0

    def Ratio(self, r ):
        "changes the height/width ratio of the isometric rectangle with respect to the horizontal (x) axis"
        self.ratio = float(r)
        self.CalcRatio()

    def CalcRatio(self):
        if (self.ratio <= 0): self.ratio = 1
        self.height = int( float(self.width)/float(self.ratio) )

    def BoundPlace(self, left,top):
        "Places the isometric rectangle using its upper left bounding corner for positioning"
        dx,dy = self.CornerOffset()
        self.Recenter( left+dx, top+dy)

    def Recenter(self,x,y):
        "Places the isomentric rectangle using the centerpoint"
        self.center_x = x
        self.center_y = y

    def Top(self):
        "Returns the topmost point of the isometric rectangle as a tuple (x,y)"
        x = int(self.center_x)
        y = int(self.center_y) - int(self.height/2)
        return(x,y)

    def Left(self):
        "Returns the leftmost point of the isometric rectangle as a tuple (x,y)"
        x = int(self.center_x) - int(self.width/2)
        y = int(self.center_y)
        return(x,y)

    def Right(self):
        "Returns the rightmost point of the isometric rectangle as a tuple (x,y)"
        x,y = self.Left()
        x = x + self.width
        return(x,y)

    def Bottom(self):
        "Returns the bottommost point of the isometric rectangle as a tuple (x,y)"
        x,y = self.Top()
        y = y + self.height
        return(x,y)

    def Center(self):
        "Returns the center point of the isometric rectangle as a tuple (x,y)"
        x = int(self.center_x)
        y = int(self.center_y)
        return(x,y)

    def CornerOffset(self):
        """Returns a tuple (delta_x,delta_y) representing the offset from the centerpoint
        of the isometric rectangle to the upper left corner of its rectangular bounding box"""
        dx = float(self.width/2)
        dy = float(self.height/2)
        return (dx,dy)

    def Height(self):
        "Returns the height of the isometric rectangle based on current ratio"
        return int(self.height)

    def Width(self):
        "returns the width of the isomentric rectangle"
        return int(self.width)