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camera.py
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camera.py
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from panda3d.core import *
from direct.showbase.DirectObject import DirectObject
from direct.interval.MetaInterval import Sequence, Parallel
from direct.interval.LerpInterval import LerpHprInterval, LerpPosInterval
from direct.interval.FunctionInterval import Func
__all__ = ['CameraControler']
class CameraControler (DirectObject):
def __init__(self, pos=(0,0,3.0), offset=(0, 12, 12), speed=1.0,
zoom_speed=1.0, limits=(3.0, 50.0, -110, 110.0)):
self.node = render.attach_new_node("node")
self.node.set_pos(pos)
self.gimbal = self.node.attach_new_node("gimbal")
base.camera.set_pos(render, offset)
base.camera.look_at(self.node)
base.camera.wrt_reparent_to(self.gimbal)
self.initial_pos=pos
self.initial_offset=offset
self.last_mouse_pos=Vec2(0,0)
self.speed=speed*70.0
self.move_speed=speed
self.zoom_speed=zoom_speed
self.zoom = 0.0
self.last_delta=Point2(0,0)
self.limits=limits[:2]
self.max_p=limits[2:4]
self.key_map = {'rotate': False, 'forward':False, 'back':False,
'left':False, 'right':False, 'pan':False,
'up':False, 'down':False}
taskMgr.add(self.update, "camcon_update")
#self.bind_keys()
def set_view(self, view='front', num=0):
views={'front':(Vec3(90, 0, 0),Vec3(90, 0, 0)),
'back': (Vec3(-90, 0, 0),Vec3(-90, 0, 0)),
'left':(Vec3(0, 0, 0),Vec3(0, 0, 0)),
'right':(Vec3(180, 0, 0),Vec3(180, 0, 0)),
'top':(Vec3(90, 0, 0),Vec3(90, 90, 0)),
'bottom':(Vec3(90, 0, 0),Vec3(90, -90, 0))}
if view in views:
if self.node.get_hpr(render).almost_equal(views[view][0]) and self.gimbal.get_hpr(render).almost_equal(views[view][1]):
return
else:
if num>3:
self.node.set_hpr(render, views[view][0])
self.gimbal.set_hpr(render, views[view][1])
self.node.set_pos(render,(0,0,0))
return
Sequence(Parallel(LerpHprInterval(self.gimbal, 0.21, views[view][1], other=render),
LerpHprInterval(self.node, 0.21, views[view][0], other=render),
LerpPosInterval(self.node, 0.21, Vec3(0,0,0), other=render)),
Func(self.set_view, view, 1+num)
).start()
def bind_keys(self, rotate='mouse3', zoom_in='wheel_up', zoom_out='wheel_down',
left='a', right='d', forward='w', back='s', pan='mouse1',
up='q', down='z', view_left=['4','arrow_left'], view_right=['6', 'arrow_right'],
view_front=['7', 'home'], view_back=['1','end'], view_top=['8', 'arrow_up'],
view_bottom=['2', 'arrow_down']):
''' Make the camera respond to key press/mouse move'''
self.ignoreAll()
self.accept(rotate, self.key_map.__setitem__, ['rotate', True])
self.accept(rotate+'-up', self.key_map.__setitem__, ['rotate', False])
self.accept(pan, self.key_map.__setitem__, ['pan', True])
self.accept(pan+'-up', self.key_map.__setitem__, ['pan', False])
#self.accept(pan.split('-')[0]+'-up', self.key_map.__setitem__, ['pan', False])
#self.accept(pan.split('-')[1]+'-up', self.key_map.__setitem__, ['pan', False])
self.accept(zoom_in, self.zoom_control,[1.0])
self.accept(zoom_out,self.zoom_control,[-1.0])
self.accept(view_left[0], self.set_view, ['left'])
self.accept(view_left[1], self.set_view, ['left'])
self.accept(view_right[0], self.set_view, ['right'])
self.accept(view_right[1], self.set_view, ['right'])
self.accept(view_top[0], self.set_view, ['top'])
self.accept(view_top[1], self.set_view, ['top'])
self.accept(view_bottom[0], self.set_view,[ 'bottom'])
self.accept(view_bottom[1], self.set_view,[ 'bottom'])
self.accept(view_front[0], self.set_view, ['front'])
self.accept(view_front[1], self.set_view, ['front'])
self.accept(view_back[0], self.set_view, ['back'])
self.accept(view_back[1], self.set_view, ['back'])
self.accept(left, self.key_map.__setitem__, ['left', True])
self.accept(left+'-up', self.key_map.__setitem__, ['left', False])
self.accept(right, self.key_map.__setitem__, ['right', True])
self.accept(right+'-up', self.key_map.__setitem__, ['right', False])
self.accept(forward, self.key_map.__setitem__, ['forward', True])
self.accept(forward+'-up', self.key_map.__setitem__, ['forward', False])
self.accept(back, self.key_map.__setitem__, ['back', True])
self.accept(back+'-up', self.key_map.__setitem__, ['back', False])
self.accept(up, self.key_map.__setitem__, ['up', True])
self.accept(up+'-up', self.key_map.__setitem__, ['up', False])
self.accept(down, self.key_map.__setitem__, ['down', True])
self.accept(down+'-up', self.key_map.__setitem__, ['down', False])
self.accept('space', self.debug)
def debug(self):
print('node', self.node.get_hpr(render))
print('gimbal',self.gimbal.get_hpr(render))
def reset(self):
self.node.set_pos(self.initial_pos)
self.node.set_hpr(0,0,0)
self.gimbal.set_hpr(0,0,0)
base.camera.set_pos(render, self.initial_offset)
base.camera.look_at(self.node)
def set_speed(self, speed):
self.speed=speed*6000.0
def set_zoom_speed(self, speed):
self.zoom_speed=speed
def zoom_control(self, amount):
self.zoom+=amount*self.zoom_speed
self.zoom=min(max(self.zoom, -20.0*self.zoom_speed), 20.0*self.zoom_speed)
def update(self, task):
dt = globalClock.getDt()
if dt > 1.0/12.0:
self.last_delta=Point2(0,0)
return task.cont
if self.key_map['forward']:
self.node.set_y(self.node,-self.move_speed*dt)
elif self.key_map['back']:
self.node.set_y(self.node,self.move_speed*dt)
if self.key_map['left']:
self.node.set_x(self.node,self.move_speed*dt)
elif self.key_map['right']:
self.node.set_x(self.node,-self.move_speed*dt)
if self.key_map['up']:
self.node.set_z(self.node,self.move_speed*dt)
elif self.key_map['down']:
self.node.set_z(self.node,-self.move_speed*dt)
if base.mouseWatcherNode.has_mouse():
if self.zoom != 0.0:
distance=base.camera.get_distance(self.node)
if (distance > self.limits[0] and self.zoom >0.0) or (distance < self.limits[1] and self.zoom < 0.0):
zoom_speed=self.zoom*dt
base.camera.set_y(base.camera, zoom_speed)
if base.camLens.is_orthographic():
film_size=Vec2(base.camLens.get_film_size())
film_size[0]-=film_size[0]*zoom_speed*0.1
film_size[1]-=film_size[1]*zoom_speed*0.1
base.camLens.set_film_size(film_size)
zoom_speed*=4.0
if self.zoom > 0.1:
self.zoom-=zoom_speed
elif self.zoom < -0.1:
self.zoom-=zoom_speed
else:
self.zoom=0.0
m_pos=base.mouseWatcherNode.get_mouse()
delta = m_pos- self.last_mouse_pos
self.last_mouse_pos = Vec2(m_pos)
#pan
if self.key_map['pan']:
pos=Vec3(delta.x, 0, delta.y)
self.node.set_pos(base.cam, self.node.get_pos(base.cam)-pos*self.move_speed*10.0)
#rotate
if self.key_map['rotate']:
p=self.gimbal.get_p()- delta[1]*self.speed
self.gimbal.set_p(min(max(p, self.max_p[0]), self.max_p[1]))
self.node.set_h(self.node.get_h()- delta[0]*self.speed)
return task.again