Source code for yade.bodiesHandling

# encoding: utf-8
"""
Miscellaneous functions, which are useful for handling bodies.
"""

from builtins import range
from yade.wrapper import *
import utils,math,numpy

from minieigen import *

#spheresPackDimensions==================================================
[docs]def spheresPackDimensions(idSpheres=[],mask=-1): """The function accepts the list of spheres id's or list of bodies and calculates max and min dimensions, geometrical center. :param list idSpheres: list of spheres :param int mask: :yref:`Body.mask` for the checked bodies :return: dictionary with keys ``min`` (minimal dimension, Vector3), ``max`` (maximal dimension, Vector3), ``minId`` (minimal dimension sphere Id, Vector3), ``maxId`` (maximal dimension sphere Id, Vector3), ``center`` (central point of bounding box, Vector3), ``extends`` (sizes of bounding box, Vector3), ``volume`` (volume of spheres, Real), ``mass`` (mass of spheres, Real), ``number`` (number of spheres, int), """ idSpheresIter=[] if (len(idSpheres)<1): #check mask ifSpherMask=[] if (mask>-1): #The case, when only the mask was given, without list of ids for i in O.bodies: if ((i.mask&mask)!=0): ifSpherMask.append(i.id) if (len(ifSpherMask)<2): raise RuntimeWarning("Not enough bodies to analyze with given mask") else: idSpheresIter=ifSpherMask else: raise RuntimeWarning("Only a list of particles with length > 1 can be analyzed") else: idSpheresIter=idSpheres minVal = Vector3.Zero maxVal = Vector3.Zero minId = Vector3.Zero maxId = Vector3.Zero counter = 0 volume = 0.0 mass = 0.0 for i in idSpheresIter: if (type(i).__name__=='int'): b = O.bodies[i] #We have received a list of ID's elif (type(i).__name__=='Body'): b = i #We have recevied a list of bodies else: raise TypeError("Unknow type of data, should be list of int's or bodies's") if (b): spherePosition=b.state.pos #skip non-existent spheres try: sphereRadius=b.shape.radius #skip non-spheres except AttributeError: continue if (mask>-1) and ((mask&b.mask)==0): continue #skip bodies with wrong mask sphereRadiusVec3 = Vector3(sphereRadius,sphereRadius,sphereRadius) sphereMax = spherePosition + sphereRadiusVec3 sphereMin = spherePosition - sphereRadiusVec3 for dim in range(0,3): if ((sphereMax[dim]>maxVal[dim]) or (counter==0)): maxVal[dim]=sphereMax[dim] maxId[dim] = b.id if ((sphereMin[dim]<minVal[dim]) or (counter==0)): minVal[dim]=sphereMin[dim] minId[dim] = b.id volume += 4.0/3.0*math.pi*sphereRadius*sphereRadius*sphereRadius mass += b.state.mass counter += 1 center = (maxVal-minVal)/2.0+minVal extends = maxVal-minVal dimensions = {'max':maxVal,'min':minVal,'maxId':maxId,'minId':minId,'center':center, 'extends':extends, 'volume':volume, 'mass':mass, 'number':counter} return dimensions
#facetsDimensions==================================================
[docs]def facetsDimensions(idFacets=[],mask=-1): """The function accepts the list of facet id's or list of facets and calculates max and min dimensions, geometrical center. :param list idFacets: list of spheres :param int mask: :yref:`Body.mask` for the checked bodies :return: dictionary with keys ``min`` (minimal dimension, Vector3), ``max`` (maximal dimension, Vector3), ``minId`` (minimal dimension facet Id, Vector3), ``maxId`` (maximal dimension facet Id, Vector3), ``center`` (central point of bounding box, Vector3), ``extends`` (sizes of bounding box, Vector3), ``number`` (number of facets, int), """ idFacetsIter=[] if (len(idFacets)<1): #check mask ifFacetMask=[] if (mask>-1): #The case, when only the mask was given, without list of ids for i in O.bodies: if ((i.mask&mask)!=0): ifFacetMask.append(i.id) if (len(ifFacetMask)<2): raise RuntimeWarning("Not enough bodies to analyze with given mask") else: idFacetsIter=ifFacetMask else: raise RuntimeWarning("Only a list of particles with length > 1 can be analyzed") else: idFacetsIter=idFacets minVal = Vector3.Zero maxVal = Vector3.Zero minId = Vector3.Zero maxId = Vector3.Zero counter = 0 for i in idFacetsIter: if (type(i).__name__=='int'): b = O.bodies[i] #We have received a list of ID's elif (type(i).__name__=='Body'): b = i #We have recevied a list of bodies else: raise TypeError("Unknow type of data, should be list of int's or bodies's") if (b): p = b.state.pos o = b.state.ori s = b.shape pt1 = p + o*s.vertices[0] pt2 = p + o*s.vertices[1] pt3 = p + o*s.vertices[2] if (mask>-1) and ((mask&b.mask)==0): continue #skip bodies with wrong mask facetMax = Vector3(max(pt1[0], pt2[0], pt3[0]), max(pt1[1], pt2[1], pt3[1]), max(pt1[2], pt2[2], pt3[2])) facetMin = Vector3(min(pt1[0], pt2[0], pt3[0]), min(pt1[1], pt2[1], pt3[1]), min(pt1[2], pt2[2], pt3[2])) for dim in range(0,3): if ((facetMax[dim]>maxVal[dim]) or (counter==0)): maxVal[dim]=facetMax[dim] maxId[dim] = b.id if ((facetMin[dim]<minVal[dim]) or (counter==0)): minVal[dim]=facetMin[dim] minId[dim] = b.id counter += 1 center = (maxVal-minVal)/2.0+minVal extends = maxVal-minVal dimensions = {'max':maxVal,'min':minVal,'maxId':maxId,'minId':minId,'center':center, 'extends':extends, 'number':counter} return dimensions
#spheresPackDimensions==================================================
[docs]def spheresModify(idSpheres=[],mask=-1,shift=Vector3.Zero,scale=1.0,orientation=Quaternion((0,1,0),0.0),copy=False): """The function accepts the list of spheres id's or list of bodies and modifies them: rotating, scaling, shifting. if copy=True copies bodies and modifies them. Also the mask can be given. If idSpheres not empty, the function affects only bodies, where the mask passes. If idSpheres is empty, the function search for bodies, where the mask passes. :param Vector3 shift: Vector3(X,Y,Z) parameter moves spheres. :param float scale: factor scales given spheres. :param Quaternion orientation: orientation of spheres :param int mask: :yref:`Body.mask` for the checked bodies :returns: list of bodies if copy=True, and Boolean value if copy=False """ idSpheresIter=[] if (len(idSpheres)==0): #check mask ifSpherMask=[] if (mask>-1): #The case, when only the mask was given, without list of ids for i in O.bodies: if ((i.mask&mask)!=0): ifSpherMask.append(i.id) if (len(ifSpherMask)==0): raise RuntimeWarning("No bodies to modify with given mask") else: idSpheresIter=ifSpherMask else: raise RuntimeWarning("No bodies to modify") else: idSpheresIter=idSpheres dims = spheresPackDimensions(idSpheresIter) ret=[] for i in idSpheresIter: if (type(i).__name__=='int'): b = O.bodies[i] #We have received a list of ID's elif (type(i).__name__=='Body'): b = i #We have recevied a list of bodies else: raise TypeError("Unknown type of data, should be list of int's or bodies") try: sphereRadius=b.shape.radius #skip non-spheres except AttributeError: continue if (mask>-1) and ((mask&b.mask)==0): continue #skip bodies with wrong mask if (copy): b=sphereDuplicate(b) b.state.pos=orientation*(b.state.pos-dims['center'])+dims['center'] b.shape.radius*=scale b.state.mass*=pow(scale, 3) b.state.inertia*=pow(scale, 5) b.state.pos=(b.state.pos-dims['center'])*scale + dims['center'] b.state.pos+=shift if (copy): ret.append(b) if (copy): return ret else: return True
#spheresDublicate=======================================================
[docs]def sphereDuplicate(idSphere): """The functions makes a copy of sphere""" i=idSphere if (type(i).__name__=='int'): b = O.bodies[i] #We have received a list of ID's elif (type(i).__name__=='Body'): b = i #We have recevied a list of bodies else: raise TypeError("Unknown type of data, should be list of int's or bodies") try: sphereRadius=b.shape.radius #skip non-spheres except AttributeError: return False addedBody = utils.sphere(center=b.state.pos,radius=b.shape.radius,fixed=not(b.dynamic),wire=b.shape.wire,color=b.shape.color,highlight=b.shape.highlight,material=b.material,mask=b.mask) return addedBody