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#############################################################
## ##
## Copyright (c) 2003-2017 by The University of Queensland ##
## Centre for Geoscience Computing ##
## http://earth.uq.edu.au/centre-geoscience-computing ##
## ##
## Primary Business: Brisbane, Queensland, Australia ##
## Licensed under the Open Software License version 3.0 ##
## http://www.apache.org/licenses/LICENSE-2.0 ##
## ##
#############################################################
"""Defines the L{Arrow} base class"""
from .exception import raiseNotImplemented
from esys.lsm.util import Vec3
class Arrow(object):
"""
Objects of this class represent arrows with conical head
and cylindrical tail.
"""
def __init__(self, tailPt, headPt, tailRadius, headRadius, headLength):
"""
Initialises arrow.
"""
self.headPt = tuple(headPt)
self.tailPt = tuple(tailPt)
self.tailRadius = tailRadius
self.headRadius = headRadius
self.headLength = headLength
def getTailPt(self):
"""
Returns the coordinate of the tail of this arrow.
@return: Tail coordinate of this arrow.
"""
return self.tailPt
def getHeadPt(self):
"""
Returns the coordinate of the pointy head of this arrow.
@return: Head coordinate of this arrow.
"""
return self.headPt
def getHeadRadius(self):
"""
Returns the max radius of the head of this arrow.
@return: Radius of base of this arrow's conical head.
"""
return self.headRadius
def getTailRadius(self):
"""
Returns the radius of the cylindrical tail of this arrow.
@return: Radius of this arrow's cylindrical tail.
"""
return self.tailRadius
def getHeadLength(self):
"""
Returns the height of the cone which forms the head of this arrow.
@return: Height of cone which forms the head of this arrow.
"""
return self.headLength
def getLength(self):
"""
Returns the distance between this arrows head-point and tail-point.
@rtype: float
@return: length of this arrow from head-point to tail-point.
"""
return (Vec3(self.getHeadPt())-Vec3(self.getTailPt())).norm()
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