class InputManager(DirectObject):
def __init__(self, base, lookatpos, pggen, togglerotcenter=False):
self.base = base
self.originallookatpos = lookatpos # for backup
self.lookatpos_pdv3 = Vec3(lookatpos[0], lookatpos[1], lookatpos[2])
self.camdist = (self.base.cam.getPos() - self.lookatpos_pdv3).length()
self.pggen = pggen
self.initviewdist = (self.base.cam.getPos() -
self.lookatpos_pdv3).length()
self.wheelscale_distance = 150
self.lastm1pos = None
self.lastm2pos = None
# toggle on the following part to explicitly show the rotation center
self.togglerotcenter = togglerotcenter
if self.togglerotcenter:
self.rotatecenternp = self.base.p3dh.gensphere(
pos=self.originallookatpos,
radius=5,
rgba=np.array([1, 1, 0, 1]))
self.rotatecenternp.reparentTo(self.base.render)
# for resetting
self.original_cam_pdmat4 = Mat4(self.base.cam.getMat())
self.keymap = {
"mouse1": False,
"mouse2": False,
"mouse3": False,
"wheel_up": False,
"wheel_down": False,
"space": False,
"w": False,
"s": False,
"a": False,
"d": False,
"g": False,
"r": False
}
self.accept("mouse1", self.__setkeys, ["mouse1", True])
self.accept("mouse1-up", self.__setkeys, ["mouse1", False])
self.accept("mouse2", self.__setkeys, ["mouse2", True])
self.accept("mouse2-up", self.__setkeys, ["mouse2", False])
self.accept("mouse3", self.__setkeys, ["mouse3", True])
self.accept("mouse3-up", self.__setkeys, ["mouse3", False])
self.accept("wheel_up", self.__setkeys, ["wheel_up", True])
self.accept("wheel_down", self.__setkeys, ["wheel_down", True])
self.accept("space", self.__setkeys, ["space", True])
self.accept("space-up", self.__setkeys, ["space", False])
self.accept("w", self.__setkeys, ["w", True])
self.accept("w-up", self.__setkeys, ["w", False])
self.accept("s", self.__setkeys, ["s", True])
self.accept("s-up", self.__setkeys, ["s", False])
self.accept("a", self.__setkeys, ["a", True])
self.accept("a-up", self.__setkeys, ["a", False])
self.accept("d", self.__setkeys, ["d", True])
self.accept("d-up", self.__setkeys, ["d", False])
self.accept("g", self.__setkeys, ["g", True])
self.accept("g-up", self.__setkeys, ["g", False])
self.accept("r", self.__setkeys, ["r", True])
self.accept("r-up", self.__setkeys, ["r", False])
self.setup_interactiongeometries()
def __setkeys(self, key, value):
self.keymap[key] = value
return
def setup_interactiongeometries(self):
"""
set up collision rays, spheres, and planes for mouse manipulation
:return: None
author: weiwei
date: 20161110
"""
# create a trackball ray and set its bitmask to 8
# the trackball ray must be a subnode of cam since we will
# transform the clicked point (in the view of the cam) to the world coordinate system
# using the ray
self.tracker_cn = CollisionNode("tracker")
self.tracker_ray = CollisionRay()
self.tracker_cn.addSolid(self.tracker_ray)
self.tracker_cn.setFromCollideMask(BitMask32.bit(8))
self.tracker_cn.setIntoCollideMask(BitMask32.allOff())
self.tracker_np = self.base.cam.attachNewNode(self.tracker_cn)
# create an inverted collision sphere and puts it into a collision node
# its bitmask is set to 8, and it will be the only collidable object at bit 8
self.trackball_cn = CollisionNode("trackball")
self.trackball_cn.addSolid(
CollisionSphere(self.lookatpos_pdv3[0], self.lookatpos_pdv3[1],
self.lookatpos_pdv3[2], self.camdist))
self.trackball_cn.setFromCollideMask(BitMask32.allOff())
self.trackball_cn.setIntoCollideMask(BitMask32.bit(8))
self.trackball_np = self.base.render.attachNewNode(self.trackball_cn)
# self.trackball_np.show()
# This creates a collision plane for mouse track
self.trackplane_cn = CollisionNode("trackplane")
# self.aimPlaneCN.addSolid(CollisionPlane(Plane(Vec3(0, 0, 1), self.lookatpos_pdv3)))
# self.trackplane_cn.addSolid(CollisionBox(Point3(self.lookatpos_pdv3[0], self.lookatpos_pdv3[1], 0.1), 1e6, 1e6, 1e-6))
self.trackplane_cn.addSolid(
CollisionPlane(
Plane(
Point3(self.base.cam.getMat().getRow3(2) -
self.base.cam.getMat().getRow3(1)),
Point3(self.lookatpos_pdv3[0], self.lookatpos_pdv3[1],
0.1))))
self.trackplane_cn.setFromCollideMask(BitMask32.allOff())
self.trackplane_cn.setIntoCollideMask(BitMask32.bit(8))
self.trackplane_np = self.base.render.attachNewNode(self.trackplane_cn)
# self.trackplane_np.show()
# creates a traverser to do collision testing
self.ctrav = CollisionTraverser()
# creates a queue type handler to receive the collision event info
self.chandler = CollisionHandlerQueue()
# register the ray as a collider with the traverser,
# and register the handler queue as the handler to be used for the collisions.
self.ctrav.addCollider(self.tracker_np, self.chandler)
# create a pickerray
self.picker_cn = CollisionNode('picker')
self.picker_ray = CollisionRay()
self.picker_cn.addSolid(self.picker_ray)
self.picker_cn.setFromCollideMask(BitMask32.bit(7))
self.picker_cn.setIntoCollideMask(BitMask32.allOff())
self.picker_np = self.base.cam.attachNewNode(self.picker_cn)
self.ctrav.addCollider(self.picker_np, self.chandler)
def shift_trackballsphere(self, center=np.array([0, 0, 0])):
self.camdist = (self.base.cam.getPos() - self.lookatpos_pdv3).length()
self.trackball_cn.setSolid(
0, CollisionSphere(center[0], center[1], center[2], self.camdist))
def shift_trackplane(self):
self.trackplane_cn.setSolid(
0,
CollisionPlane(
Plane(
Point3(self.base.cam.getMat().getRow3(2) -
self.base.cam.getMat().getRow3(1)),
Point3(self.lookatpos_pdv3[0], self.lookatpos_pdv3[1],
0.1))))
def get_world_mouse1(self):
"""
给et the position of mouse1 (clicked) using collision detection between a sphere and a ray
:return: Vec3 or None
author: weiwei
date: 20161110
"""
if self.base.mouseWatcherNode.hasMouse():
if self.keymap['mouse1']:
# get the mouse position in the window
mpos = self.base.mouseWatcherNode.getMouse()
# sets the ray's origin at the camera and directs it to shoot through the mouse cursor
self.tracker_ray.setFromLens(self.base.cam.node(), mpos.getX(),
mpos.getY())
# performs the collision checking pass
self.ctrav.traverse(self.trackball_np)
if (self.chandler.getNumEntries() > 0):
# Sort the handler entries from nearest to farthest
self.chandler.sortEntries()
entry = self.chandler.getEntry(0)
colPoint = entry.getSurfacePoint(self.base.render)
return colPoint
return None
def check_mouse1drag(self):
"""
this function uses a collision sphere to track the rotational mouse motion
:return:
author: weiwei
date: 20200315
"""
curm1pos = self.get_world_mouse1()
if curm1pos is None:
if self.lastm1pos is not None:
self.lastm1pos = None
return
if self.lastm1pos is None:
# first time click
self.lastm1pos = curm1pos
return
curm1vec = Vec3(curm1pos - self.lookatpos_pdv3)
lastm1vec = Vec3(self.lastm1pos - self.lookatpos_pdv3)
curm1vec.normalize()
lastm1vec.normalize()
rotatevec = curm1vec.cross(lastm1vec)
if rotatevec.length() > 1e-10: # avoid zero length
rotateangle = curm1vec.signedAngleDeg(lastm1vec, rotatevec)
rotateangle = rotateangle * self.camdist * 5
if rotateangle > .02 or rotateangle < -.02:
rotmat = Mat4(self.base.cam.getMat())
posvec = Vec3(self.base.cam.getPos())
rotmat.setRow(3, Vec3(0, 0, 0))
self.base.cam.setMat(rotmat *
Mat4.rotateMat(rotateangle, rotatevec))
self.base.cam.setPos(Mat3.rotateMat(rotateangle, rotatevec). \
xform(posvec - self.lookatpos_pdv3) + self.lookatpos_pdv3)
self.lastm1pos = self.get_world_mouse1()
self.shift_trackplane()
def get_world_mouse2(self):
if self.base.mouseWatcherNode.hasMouse():
if self.keymap['mouse2']:
mpos = self.base.mouseWatcherNode.getMouse()
self.tracker_ray.setFromLens(self.base.cam.node(), mpos.getX(),
mpos.getY())
self.ctrav.traverse(self.trackplane_np)
self.chandler.sortEntries()
if (self.chandler.getNumEntries() > 0):
entry = self.chandler.getEntry(0)
colPoint = entry.getSurfacePoint(self.base.render)
return colPoint
return None
def check_mouse2drag(self):
"""
:return:
author: weiwei
date: 20200313
"""
curm2pos = self.get_world_mouse2()
if curm2pos is None:
if self.lastm2pos is not None:
self.lastm2pos = None
return
if self.lastm2pos is None:
# first time click
self.lastm2pos = curm2pos
return
relm2vec = curm2pos - self.lastm2pos
if relm2vec.length() > 1:
self.base.cam.setPos(self.base.cam.getPos() - relm2vec)
self.lookatpos_pdv3 = Vec3(self.lookatpos_pdv3 - relm2vec)
newlookatpos = self.base.p3dh.pdv3_to_npv3(self.lookatpos_pdv3)
if self.togglerotcenter:
self.rotatecenternp.detachNode()
self.rotatecenternp = self.base.p3dh.gensphere(
pos=newlookatpos, radius=5, rgba=np.array([1, 1, 0, 1]))
self.rotatecenternp.reparentTo(self.base.render)
self.shift_trackballsphere(self.lookatpos_pdv3)
self.last2mpos = curm2pos
def get_world_mouse3(self):
"""
picker ray
:return:
author: weiwei
date: 20200316
"""
if self.base.mouseWatcherNode.hasMouse():
if self.keymap['mouse3']:
mpos = self.base.mouseWatcherNode.getMouse()
self.picker_ray.setFromLens(self.base.cam.node(), mpos.getX(),
mpos.getY())
self.ctrav.traverse(self.base.render)
if (self.chandler.getNumEntries() > 0):
self.chandler.sortEntries()
entry = self.chandler.getEntry(0)
colPoint = entry.getSurfacePoint(self.base.render)
return colPoint
return None
def check_mouse3click(self):
"""
:return:
author: weiwei
date: 20200316
"""
curm3pos = self.get_world_mouse3()
if curm3pos is None:
return
else:
print(curm3pos)
def check_mousewheel(self):
"""
zoom up or down the 3d view considering mouse action
author: weiwei
date: 2016, 20200313
:return:
"""
if self.keymap["wheel_up"] is True:
self.keymap["wheel_up"] = False
backward = self.base.cam.getPos() - self.lookatpos_pdv3
backward.normalize()
newpos = self.base.cam.getPos(
) + backward * self.wheelscale_distance
if newpos.length() < self.initviewdist * 20:
self.base.cam.setPos(newpos[0], newpos[1], newpos[2])
self.shift_trackballsphere(
self.trackball_cn.getSolid(0).getCenter())
if self.keymap["wheel_down"] is True:
self.keymap["wheel_down"] = False
forward = self.lookatpos_pdv3 - self.base.cam.getPos()
if forward.length() < self.wheelscale_distance:
return
forward.normalize()
newpos = self.base.cam.getPos(
) + forward * self.wheelscale_distance
if newpos.length() > self.initviewdist * .05:
self.base.cam.setPos(newpos[0], newpos[1], newpos[2])
self.shift_trackballsphere(
self.trackball_cn.getSolid(0).getCenter())
def check_mouse1drag_trackball(self):
"""
This function uses the stereographic projection
introduced in https://en.wikipedia.org/wiki/Stereographic_projection to track the rotational mouse motion
Equations:
[e, f] -> [x, y, z] = [2e/(1+e^2+f^2), 2f/(1+e^2+f^2), (-1+e^2+f^2)/(2+2e^2+2f^2)]
:return:
author: weiwei
date: 20200315
"""
def cvtvirtualtrackball(screenx, screeny, psec_squared=1 / 4):
"""
convert a screen point to virtual trackball coordinate
psec indicates the size of the spherical section to be mapped to
default radius = 1
:param screenx:
:param screeny:
:param psec_squared:
:return:
author: weiwei
date: 20200315
"""
screenpoint_squaredsum = screenx**2 + screeny**2
trackballx = 2 * psec_squared * screenx / (psec_squared +
screenpoint_squaredsum)
trackballz = 2 * psec_squared * screeny / (psec_squared +
screenpoint_squaredsum)
trackbally = -math.sqrt(1 - trackballx**2 - trackballz**2)
returnvec = Vec3(trackballx, trackbally, trackballz)
returnvec.normalize()
return returnvec
currentmouse = self.base.mouseWatcherNode.getMouse()
curm1pos = [currentmouse.getX(), currentmouse.getY()]
if curm1pos is None:
if self.lastm1pos is not None:
self.lastm1pos = None
return
if self.lastm1pos is None:
# first time click
self.lastm1pos = curm1pos
return
curm1vec_pdv3 = cvtvirtualtrackball(curm1pos[0], curm1pos[1])
lastm1vec_pdv3 = cvtvirtualtrackball(self.lastm1pos[0],
self.lastm1pos[1])
rotatevec_pdv3 = curm1vec_pdv3.cross(lastm1vec_pdv3)
rotateangle = curm1vec_pdv3.signedAngleDeg(lastm1vec_pdv3,
rotatevec_pdv3)
if rotateangle > .02 or rotateangle < -.02:
rotateangle = rotateangle * 5
camrotmat_pd = self.base.cam.getMat().getUpper3()
calibrated_camrotmat_pd = Mat3.rotateMat(
rotateangle, camrotmat_pd.xformVec(rotatevec_pdv3))
posvec_pd = self.base.cam.getPos()
self.base.cam.setMat(Mat4.identMat())
self.base.cam.setMat(camrotmat_pd * calibrated_camrotmat_pd)
self.base.cam.setPos(
calibrated_camrotmat_pd.xform(posvec_pd -
self.lookatpos_pdv3) +
self.lookatpos_pdv3)
self.lastm1pos = curm1pos[:]
def check_resetcamera(self):
"""
reset the rendering window to its initial viewpoint
:return:
author: weiwei
date: 20200316
"""
if self.keymap["r"] is True:
self.keymap["r"] = False
self.base.cam.setMat(self.original_cam_pdmat4)
self.lookatpos_pdv3 = self.base.p3dh.npv3_to_pdv3(
self.originallookatpos)
# toggle on the following part to explicitly show the rotation center
if self.togglerotcenter:
self.rotatecenternp.detachNode()
self.rotatecenternp = self.base.p3dh.gensphere(
pos=self.originallookatpos,
radius=5,
rgba=np.array([1, 1, 0, 1]))
self.rotatecenternp.reparentTo(self.base.render)
class InputManager(DirectObject):
def __init__(self, base, lookatpos, togglerotcenter=False):
self.base = base
self.originallookatpos = lookatpos # for backup
self.lookatpos_pdv3 = Vec3(lookatpos[0], lookatpos[1], lookatpos[2])
self.camdist = (self.base.cam.getPos() - self.lookatpos_pdv3).length()
self.initviewdist = (self.base.cam.getPos() -
self.lookatpos_pdv3).length()
self.lastm1pos = None
self.lastm2pos = None
# toggle on the following part to explicitly show the rotation center
self.togglerotcenter = togglerotcenter
if self.togglerotcenter:
self.rotatecenternp = self.base.p3dh.gensphere(
pos=self.originallookatpos,
radius=5,
rgba=np.array([1, 1, 0, 1]))
self.rotatecenternp.reparentTo(self.base.render)
# for resetting
self.original_cam_pdmat4 = Mat4(self.base.cam.getMat())
self.keymap = {
"mouse1": False,
"mouse2": False,
"mouse3": False,
"wheel_up": False,
"wheel_down": False,
"space": False,
"w": False,
"s": False,
"a": False,
"d": False,
"g": False,
"r": False
}
self.accept("mouse1", self.__setkeys, ["mouse1", True])
self.accept("mouse1-up", self.__setkeys, ["mouse1", False])
self.accept("mouse2", self.__setkeys, ["mouse2", True])
self.accept("mouse2-up", self.__setkeys, ["mouse2", False])
self.accept("mouse3", self.__setkeys, ["mouse3", True])
self.accept("mouse3-up", self.__setkeys, ["mouse3", False])
self.accept("wheel_up", self.__setkeys, ["wheel_up", True])
self.accept("wheel_down", self.__setkeys, ["wheel_down", True])
self.accept("space", self.__setkeys, ["space", True])
self.accept("space-up", self.__setkeys, ["space", False])
self.accept("w", self.__setkeys, ["w", True])
self.accept("w-up", self.__setkeys, ["w", False])
self.accept("s", self.__setkeys, ["s", True])
self.accept("s-up", self.__setkeys, ["s", False])
self.accept("a", self.__setkeys, ["a", True])
self.accept("a-up", self.__setkeys, ["a", False])
self.accept("d", self.__setkeys, ["d", True])
self.accept("d-up", self.__setkeys, ["d", False])
self.accept("g", self.__setkeys, ["g", True])
self.accept("g-up", self.__setkeys, ["g", False])
self.accept("r", self.__setkeys, ["r", True])
self.accept("r-up", self.__setkeys, ["r", False])
self.setup_interactiongeometries()
def __setkeys(self, key, value):
self.keymap[key] = value
return
def setup_interactiongeometries(self):
"""
set up collision rays, spheres, and planes for mouse manipulation
:return: None
author: weiwei
date: 20161110
"""
# create a trackball ray and set its bitmask to 8
# the trackball ray must be a subnode of cam since we will
# transform the clicked point (in the view of the cam) to the world coordinate system
# using the ray
self.tracker_cn = CollisionNode("tracker")
self.tracker_ray = CollisionRay()
self.tracker_cn.addSolid(self.tracker_ray)
self.tracker_cn.setFromCollideMask(BitMask32.bit(8))
self.tracker_cn.setIntoCollideMask(BitMask32.allOff())
self.tracker_np = self.base.cam.attachNewNode(self.tracker_cn)
# create an inverted collision sphere and puts it into a collision node
# its bitmask is set to 8, and it will be the only collidable object at bit 8
self.trackball_cn = CollisionNode("trackball")
self.trackball_cn.addSolid(
CollisionSphere(self.lookatpos_pdv3[0], self.lookatpos_pdv3[1],
self.lookatpos_pdv3[2], self.camdist))
self.trackball_cn.setFromCollideMask(BitMask32.allOff())
self.trackball_cn.setIntoCollideMask(BitMask32.bit(8))
self.trackball_np = self.base.render.attachNewNode(self.trackball_cn)
# self.trackball_np.show()
# This creates a collision plane for mouse track
self.trackplane_cn = CollisionNode("trackplane")
self.trackplane_cn.addSolid(
CollisionPlane(
Plane(
Point3(-self.base.cam.getMat().getRow3(1)),
Point3(self.lookatpos_pdv3[0], self.lookatpos_pdv3[1],
0.0))))
self.trackplane_cn.setFromCollideMask(BitMask32.allOff())
self.trackplane_cn.setIntoCollideMask(BitMask32.bit(8))
self.trackplane_np = self.base.render.attachNewNode(self.trackplane_cn)
# self.trackplane_np.show()
# creates a traverser to do collision testing
self.ctrav = CollisionTraverser()
# creates a queue type handler to receive the collision event info
self.chandler = CollisionHandlerQueue()
# register the ray as a collider with the traverser,
# and register the handler queue as the handler to be used for the collisions.
self.ctrav.addCollider(self.tracker_np, self.chandler)
# create a pickerray
self.picker_cn = CollisionNode('picker')
self.picker_ray = CollisionRay()
self.picker_cn.addSolid(self.picker_ray)
self.picker_cn.setFromCollideMask(BitMask32.bit(7))
self.picker_cn.setIntoCollideMask(BitMask32.allOff())
self.picker_np = self.base.cam.attachNewNode(self.picker_cn)
self.ctrav.addCollider(self.picker_np, self.chandler)
def update_trackballsphere(self, center=np.array([0, 0, 0])):
self.camdist = (self.base.cam.getPos() - self.lookatpos_pdv3).length()
self.trackball_cn.setSolid(
0, CollisionSphere(center[0], center[1], center[2], self.camdist))
def update_trackplane(self):
self.trackplane_cn.setSolid(
0,
CollisionPlane(
Plane(
Point3(-self.base.cam.getMat().getRow3(1)),
Point3(self.lookatpos_pdv3[0], self.lookatpos_pdv3[1],
0.0))))
def get_world_mouse1(self):
"""
get the position of mouse1 (clicked) using collision detection between a sphere and a ray
:return: Vec3 or None
author: weiwei
date: 20161110
"""
if self.base.mouseWatcherNode.hasMouse():
if self.keymap['mouse1']:
# get the mouse position in the window
mpos = self.base.mouseWatcherNode.getMouse()
# sets the ray's origin at the camera and directs it to shoot through the mouse cursor
self.tracker_ray.setFromLens(self.base.cam.node(), mpos.getX(),
mpos.getY())
# performs the collision checking pass
self.ctrav.traverse(self.trackball_np)
if (self.chandler.getNumEntries() > 0):
# Sort the handler entries from nearest to farthest
self.chandler.sortEntries()
entry = self.chandler.getEntry(0)
colPoint = entry.getSurfacePoint(self.base.render)
return colPoint
return None
def check_mouse1drag(self):
"""
this function uses a collision sphere to track the rotational mouse motion
:return:
author: weiwei
date: 20200315
"""
curm1pos = self.get_world_mouse1()
if curm1pos is None:
if self.lastm1pos is not None:
self.lastm1pos = None
return
if self.lastm1pos is None:
# first time click
self.lastm1pos = curm1pos
return
curm1vec = Vec3(curm1pos - self.lookatpos_pdv3)
lastm1vec = Vec3(self.lastm1pos - self.lookatpos_pdv3)
curm1vec.normalize()
lastm1vec.normalize()
rotatevec = curm1vec.cross(lastm1vec)
if rotatevec.length() > 1e-9: # avoid zero length
rotateangle = curm1vec.signedAngleDeg(lastm1vec, rotatevec)
rotateangle = rotateangle * self.camdist * 5000
if rotateangle > .02 or rotateangle < -.02:
rotmat = Mat4(self.base.cam.getMat())
posvec = Vec3(self.base.cam.getPos())
rotmat.setRow(3, Vec3(0, 0, 0))
self.base.cam.setMat(rotmat *
Mat4.rotateMat(rotateangle, rotatevec))
self.base.cam.setPos(Mat3.rotateMat(rotateangle, rotatevec). \
xform(posvec - self.lookatpos_pdv3) + self.lookatpos_pdv3)
self.lastm1pos = self.get_world_mouse1()
self.update_trackplane()
def get_world_mouse2(self):
if self.base.mouseWatcherNode.hasMouse():
if self.keymap['mouse2']:
mpos = self.base.mouseWatcherNode.getMouse()
self.tracker_ray.setFromLens(self.base.cam.node(), mpos.getX(),
mpos.getY())
self.ctrav.traverse(self.trackplane_np)
self.chandler.sortEntries()
if (self.chandler.getNumEntries() > 0):
entry = self.chandler.getEntry(0)
colPoint = entry.getSurfacePoint(self.base.render)
return colPoint
return None
def check_mouse2drag(self):
"""
:return:
author: weiwei
date: 20200313
"""
curm2pos = self.get_world_mouse2()
if curm2pos is None:
if self.lastm2pos is not None:
self.lastm2pos = None
return
if self.lastm2pos is None:
# first time click
self.lastm2pos = curm2pos
return
relm2vec = curm2pos - self.lastm2pos
if relm2vec.length() > 0.001:
self.base.cam.setPos(self.base.cam.getPos() - relm2vec)
self.lookatpos_pdv3 = Vec3(self.lookatpos_pdv3 - relm2vec)
newlookatpos = self.base.p3dh.pdv3_to_npv3(self.lookatpos_pdv3)
if self.togglerotcenter:
self.rotatecenternp.detachNode()
self.rotatecenternp = self.base.p3dh.gensphere(
pos=newlookatpos,
radius=0.005,
rgba=np.array([1, 1, 0, 1]))
self.rotatecenternp.reparentTo(self.base.render)
self.update_trackballsphere(self.lookatpos_pdv3)
self.last2mpos = curm2pos
def get_world_mouse3(self):
"""
picker ray
:return:
author: weiwei
date: 20200316
"""
if self.base.mouseWatcherNode.hasMouse():
if self.keymap['mouse3']:
mpos = self.base.mouseWatcherNode.getMouse()
self.picker_ray.setFromLens(self.base.cam.node(), mpos.getX(),
mpos.getY())
self.ctrav.traverse(self.base.render)
if (self.chandler.getNumEntries() > 0):
self.chandler.sortEntries()
entry = self.chandler.getEntry(0)
colPoint = entry.getSurfacePoint(self.base.render)
return colPoint
return None
def check_mouse3click(self):
"""
:return:
author: weiwei
date: 20200316
"""
curm3pos = self.get_world_mouse3()
return None if curm3pos is None else print(curm3pos)
def check_mousewheel(self):
"""
zoom up or down the 3d view considering mouse action
author: weiwei
date: 2015?, 20200313
:return:
"""
self.camdist = (self.base.cam.getPos() - self.lookatpos_pdv3).length()
if self.keymap["wheel_up"] is True:
self.keymap["wheel_up"] = False
backward = self.base.cam.getPos() - self.lookatpos_pdv3
newpos = self.base.cam.getPos() + backward * 0.05
if newpos.length() < self.initviewdist * 100:
self.base.cam.setPos(newpos[0], newpos[1], newpos[2])
self.update_trackballsphere(
self.trackball_cn.getSolid(0).getCenter())
if self.keymap["wheel_down"] is True:
self.keymap["wheel_down"] = False
forward = self.lookatpos_pdv3 - self.base.cam.getPos()
wheelscale_distance = 0.05
if forward.length() < 0.05:
wheelscale_distance = 0.0025
elif forward.length() < 0.0025:
return
newpos = self.base.cam.getPos() + forward * wheelscale_distance
if newpos.length() > self.initviewdist * .01:
self.base.cam.setPos(newpos[0], newpos[1], newpos[2])
self.update_trackballsphere(
self.trackball_cn.getSolid(0).getCenter())
def check_resetcamera(self):
"""
reset the rendering window to its initial viewpoint
:return:
author: weiwei
date: 20200316
"""
if self.keymap["r"] is True:
self.keymap["r"] = False
self.base.cam.setMat(self.original_cam_pdmat4)
self.lookatpos_pdv3 = self.base.p3dh.npv3_to_pdv3(
self.originallookatpos)
self.update_trackplane()
self.update_trackballsphere(self.lookatpos_pdv3)
# toggle on the following part to explicitly show the rotation center
if self.togglerotcenter:
self.rotatecenternp.detachNode()
self.rotatecenternp = self.base.p3dh.gensphere(
pos=self.originallookatpos,
radius=0.005,
rgba=np.array([1, 1, 0, 1]))
self.rotatecenternp.reparentTo(self.base.render)