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camera.py
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camera.py
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# Copyright (c) 1998, Regents of the University of California
# All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the University of California, Berkeley nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from kivy.graphics.context_instructions import Scale,Rotate,Translate,PushMatrix,PopMatrix
from kivy.config import Config
from vector2d import Vector2d
class Camera:
scale = 1.0
position = Vector2d(0,0)
screenh = Config.getint('graphics', 'height')
screenw = Config.getint('graphics', 'width')
def screenToWorld(self,x,y):
return Vector2d(x/self.scale+self.position.getX(),y/self.scale+self.position.getY())
def getPosition(self):
return self.position
def setup(self,canvas):
with canvas:
Scale(self.scale)
Translate(-self.getPosition().getX(),-self.getPosition().getY(),0)
#self.getPosition().set(self.getPosition().getX()+1,self.getPosition().getY())
#def translateTo(self,x,y):
def follow(self,p1):
target = p1.getPosition().copy()
current = self.screenToWorld(self.screenw/2.0,self.screenh/2.0)
distance = Vector2d.distance(target,current)
target.sub(current)
target.mulScalar(1.0/distance)
p = self.screenToWorld(0,0)
p2 = self.screenToWorld(self.screenw,self.screenh)
x = target.getX()
y = target.getY()
currentp = self.position.copy()
currentp.add(target)
if p.getX() < 0.0 and target.getX() < 0.0 :
x = 0.0
if p2.getX() > self.screenw and target.getX() > 0.0 :
x = 0.0
if p.getY() < 0.0 and target.getY() < 0.0 :
y = 0.0
if p2.getY() > self.screenh and target.getY() > 0.0 :
y = 0.0
#p2.display()
target.set(x,y)
self.position.add(target)
def focus(self,p1,p2):
top = self.screenToWorld(self.screenw,self.screenh)
bottom = self.screenToWorld(0,0)
centerx = (p1.getX() + p2.getX())/2.0
centery = (p1.getY() + p2.getY())/2.0
dx = centerx - p1.getX()
if dx < 0:
dx = -dx
dy = centery - p1.getY()
if dy < 0:
dy = -dy
focusstep = 2.0
print "CENTER %f - %f POSITION %f - %f"%(centerx,centery,self.position.getX(),self.position.getY())
print "DX %f - %f X=%f X=%f"%(dx,dy,centerx-dx,centerx+dx)
posx = self.position.getX()
posy = self.position.getY()
if (centerx - dx) > self.position.getX() + focusstep:
self.position.set(self.position.getX() + focusstep,self.position.getY())
if (centerx - dx) < (self.position.getX() - focusstep):
self.position.set(self.position.getX() - focusstep,self.position.getY())
#if centery > self.position.getY() + focusstep:
# self.position.set(self.position.getX(),self.position.getY() + focusstep)
#if (centerx + dx) < (posx - focusstep):
# self.position.set(posx - focusstep,posy)
#if centery < self.position.getY() - focusstep:
# self.position.set(self.position.getX(),self.position.getY() - focusstep)
if p1.getX() > bottom.getX() and p1.getX() < top.getX() and p2.getX() > bottom.getX() and p2.getX() < top.getX() and p1.getY() > bottom.getY() and p1.getY() < top.getY() and p2.getY() > bottom.getY() and p2.getY() < top.getY():
if self.scale < 10:
self.scale = self.scale + 0.005
else :
if self.scale > 1.05:
self.scale = self.scale - 0.005