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add faceForwardDelta, faceForwardNode

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This commit is contained in:
David Rose 2011-09-13 23:15:30 +00:00
parent 7d7edee889
commit 0f7b6d6c40
1 changed files with 18 additions and 5 deletions
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23
direct/src/directutil/Mopath.py
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@ -18,6 +18,8 @@ class Mopath(DirectObject):
self.hprPoint = Point3(0)
self.tangentVec = Vec3(0)
self.fFaceForward = 0
self.faceForwardDelta = None
self.faceForwardNode = None
self.timeScale = 1
self.upVectorNodePath = upVectorNodePath
self.reverseUpVector = reverseUpVector
@ -118,16 +120,27 @@ class Mopath(DirectObject):
self.hprNurbsCurve.getPoint(self.playbackTime, self.hprPoint)
node.setHpr(self.hprPoint)
elif (self.fFaceForward and (self.xyzNurbsCurve != None)):
self.xyzNurbsCurve.getTangent(self.playbackTime, self.tangentVec)
#use the self.upVectorNodePath position if it exists to create an up vector for lookAt
if self.faceForwardDelta:
# Look at a point a bit ahead in parametric time.
t = min(self.playbackTime + self.faceForwardDelta, self.xyzNurbsCurve.getMaxT())
lookPoint = Point3()
self.xyzNurbsCurve.getPoint(t, lookPoint)
if self.faceForwardNode:
self.faceForwardNode.setPos(lookPoint)
else:
self.xyzNurbsCurve.getTangent(self.playbackTime, self.tangentVec)
lookPoint = self.posPoint + self.tangentVec
# use the self.upVectorNodePath position if it exists to
# create an up vector for lookAt
if (self.upVectorNodePath is None):
node.lookAt(Point3(self.posPoint + self.tangentVec))
node.lookAt(lookPoint)
else:
if (self.reverseUpVector == False):
node.lookAt(Point3(self.posPoint + self.tangentVec),
node.lookAt(lookPoint,
self.upVectorNodePath.getPos() - self.posPoint)
else:
node.lookAt(Point3(self.posPoint + self.tangentVec),
node.lookAt(lookPoint,
self.posPoint - self.upVectorNodePath.getPos())
def play(self, node, time = 0.0, loop = 0):