![](\"http:\/\/dannywynne.com\/images\/Capture.JPG\")
\n[python]
\nimport maya.OpenMaya as om
\nfrom math import *
\nimport maya.cmds as cmds<\/p>\n
\n[python]
\nimport maya.OpenMaya as om
\nfrom math import *
\nimport maya.cmds as cmds<\/p>\n
def wi(v,vi,tris):
\n\t#calculates the weights
\n\t#v = kernal of the starshaped polyhedron. this is the point that
\n\t#\twill be deformed
\n\t#vi = the current vert we are iterating over on the bounding polyhedron
\n\t#tris = all triangle facets on the polyhedron that vi is a member of
\n\tdef A(vr,vs):
\n\t\t#get an angle
\n\t\tvec1 = vr-v
\n\t\tvec2 = vs-v
\n\t\treturn vec1.angle(vec2)
\n\tdef N(vr, vs):
\n\t\t#get the normal
\n\t\tvecr = vr-v
\n\t\tvecs = vs-v
\n\t\tnorm = vecr^vecs
\n\t\tnorm.normalize()
\n\t\treturn norm<\/p>\n
\tdef ut(i,j,k):
\n\t\t#floater’s equation for ut
\n\t\ttop = A(j,k) + A(i,j)*( N(i, j)*N(j, k) ) + A(k,i)*(N(k, i)*N(j, k))
\n\t\tbot = 2*( (v-i)*N(j,k) )
\n\t\treturn top\/bot<\/p>\n
\tri = v.distanceTo(vi)
\n\t#pass all the triangles through floaters equation and sum up the results
\n\tut_sum = 0
\n\tfor t in tris:
\n\t\tut_sum += ut(t[0], t[1], t[2])
\n\treturn ut_sum\/ri<\/p>\n
class MVC():
\n\tdef __init__(self):
\n\t\t#this is our main vert, the one that will be deformed
\n\t\tself.v = u.pnt(“v”)
\n\t\tself.bary = self.get_bary()<\/p>\n
\tdef update(self):
\n\t\tv = self.v
\n\t\t#refresh the list p with the current location of the locators in maya
\n\t\tp = [u.pnt(“v0”), u.pnt(“v1”), u.pnt(“v2”), u.pnt(“v3”)]
\n\t\tx,y,z = 0,0,0
\n\t\tfor i in range(len(p)):
\n\t\t\tx += p[i].x*self.bary[i]
\n\t\t\ty += p[i].y*self.bary[i]
\n\t\t\tz += p[i].z*self.bary[i]
\n\t\t#place a new locator at the deformed position
\n\t\tu.loc(om.MPoint(x, y, z))<\/p>\n
\tdef get_bary(self):
\n\t\t#get the barycentric weights
\n\t\tv = self.v
\n\t\t#get 4 points from maya that represent a polygon
\n\t\tp = [u.pnt(“v0”), u.pnt(“v1”), u.pnt(“v2”), u.pnt(“v3”)]
\n\t\t#create a list of verts and all triangles that that vert
\n\t\t#\tis a memeber of
\n\t\t#the triangels are i,j,k, going counter clock wise, and
\n\t\t#\ti = the associated vert that will be iterated over
\n\t\tvert_tri=[
\n\t\t[p[0], [(p[0], p[1], p[2]), (p[0], p[3], p[1]), (p[0], p[2], p[3]),]],
\n\t\t[p[1], [(p[1], p[2], p[0]), (p[1], p[3], p[2]), (p[1], p[0], p[3]),]],
\n\t\t[p[2], [(p[2], p[0], p[1]), (p[2], p[1], p[3]), (p[2], p[3], p[0]),]],
\n\t\t[p[3], [(p[3], p[2], p[1]), (p[3], p[1], p[0]), (p[3], p[0], p[2]),]],
\n\t\t]<\/p>\n
\t\t#verify in maya that all triangles are counter clockwise,
\n\t\t#\tnormal outward, and begin with the same vert,
\n\t\t#\tthe one that will be iterated over
\n\t\tverify_triangles(vert_tri)<\/p>\n
\t\t#get the weight
\n\t\tweights = []
\n\t\tfor vt in new_vert_tri:
\n\t\t\tt= list(vt[1])
\n\t\t\tt.reverse()
\n\t\t\tweights.append(wi(v, vt[0], t))<\/p>\n
\t\t#get the bary weights
\n\t\tbary_weights=[]
\n\t\tweights_sum = sum(weights)
\n\t\tfor w in weights:
\n\t\t\tbary_weights.append(w\/weights_sum)
\n\t\treturn bary_weights
\n[\/python]<\/p>\n","protected":false},"excerpt":{"rendered":"
[python] import maya.OpenMaya as om from math import * import maya.cmds as cmds def wi(v,vi,tris): #calculates the weights #v = kernal of the starshaped polyhedron. this is the point that # will be deformed #vi = the current vert we are iterating over on the bounding polyhedron #tris = all triangle facets on the polyhedron […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-57","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/www.dannywynne.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/57","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.dannywynne.com\/blog\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.dannywynne.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.dannywynne.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.dannywynne.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=57"}],"version-history":[{"count":0,"href":"http:\/\/www.dannywynne.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/57\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.dannywynne.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=57"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}