def dyna(self,x,y):
"""Perform dynamic zoom/pan/rotation functions"""
w,h = self.width(),self.height()
if self.dynamic == "trirotate":
# set all three rotations from mouse movement
# tangential movement sets twist,
# but only if initial vector is big enough
x0 = self.state # initial vector
d = vector.length(x0)
if d > h/8:
x1 = [x-w/2, h/2-y, 0] # new vector
a0 = math.atan2(x0[0],x0[1])
a1 = math.atan2(x1[0],x1[1])
an = (a1-a0) / math.pi * 180
ds = utils.stuur(d,[-h/4,h/8,h/4],[-1,0,1],2)
twist = - an*ds
#print "an,d,ds = ",an,d,ds,twist
self.camera.rotate(twist,0.,0.,1.)
self.state = x1
# radial movement rotates around vector in lens plane
x0 = [self.statex-w/2, h/2-self.statey, 0] # initial vector
dx = [x-self.statex, self.statey-y,0] # movement
b = vector.projection(dx,x0)
#print "x0,dx,b=",x0,dx,b
if abs(b) > 5:
val = utils.stuur(b,[-2*h,0,2*h],[-180,0,+180],1)
rot = [ abs(val),-dx[1],dx[0],0 ]
#print "val,rot=",val,rot
self.camera.rotate(*rot)
self.statex,self.statey = (x,y)
elif self.dynamic == "pan":
dist = self.camera.getDist() * 0.5
# hor movement sets x value of center
# vert movement sets y value of center
#panx = utils.stuur(x,[0,self.statex,w],[-dist,0.,+dist],1.0)
#pany = utils.stuur(y,[0,self.statey,h],[-dist,0.,+dist],1.0)
#self.camera.setCenter (self.state[0] - panx, self.state[1] + pany, self.state[2])
dx,dy = (x-self.statex,y-self.statey)
panx = utils.stuur(dx,[-w,0,w],[-dist,0.,+dist],1.0)
pany = utils.stuur(dy,[-h,0,h],[-dist,0.,+dist],1.0)
#print dx,dy,panx,pany
self.camera.translate(panx,-pany,0)
self.statex,self.statey = (x,y)
elif self.dynamic == "zoom":
# hor movement is lens zooming
f = utils.stuur(x,[0,self.statex,w],[180,self.statef,0],1.2)
self.camera.setLens(f)
elif self.dynamic == "combizoom":
# hor movement is lens zooming
f = utils.stuur(x,[0,self.statex,w],[180,self.state[1],0],1.2)
#print "Lens Zooming: %s" % f
self.camera.setLens(f)
# vert movement is dolly zooming
d = utils.stuur(y,[0,self.statey,h],[0.2,1,5],1.2)
self.camera.setDist(d*self.state[0])
self.update()
def dynarot(self,x,y,action):
"""Perform dynamic rotation operation.
This function processes mouse button events controlling a dynamic
rotation operation. The action is one of PRESS, MOVE or RELEASE.
"""
if action == PRESS:
w,h = self.width(),self.height()
self.state = [self.statex-w/2, self.statey-h/2, 0.]
elif action == MOVE:
w,h = self.width(),self.height()
# set all three rotations from mouse movement
# tangential movement sets twist,
# but only if initial vector is big enough
x0 = self.state # initial vector
d = length(x0)
if d > h/8:
# GD.debug(d)
x1 = [x-w/2, y-h/2, 0] # new vector
a0 = atan2(x0[0],x0[1])
a1 = atan2(x1[0],x1[1])
an = (a1-a0) / pi * 180
ds = utils.stuur(d,[-h/4,h/8,h/4],[-1,0,1],2)
twist = - an*ds
self.camera.rotate(twist,0.,0.,1.)
self.state = x1
# radial movement rotates around vector in lens plane
x0 = [self.statex-w/2, self.statey-h/2, 0] # initial vector
dx = [x-self.statex, y-self.statey,0] # movement
b = projection(dx,x0)
if abs(b) > 5:
val = utils.stuur(b,[-2*h,0,2*h],[-180,0,+180],1)
rot = [ abs(val),-dx[1],dx[0],0 ]
self.camera.rotate(*rot)
self.statex,self.statey = (x,y)
self.update()
elif action == RELEASE:
self.update()
self.camera.saveMatrix()
