def __updatePrism(self, mesh, o, e, index):
dir = aljabr.vsub(e, o) # direction vector from o to e
len = aljabr.vlen(dir) # distance from o to e
scale = len * 0.1 # the thickness is 10% of the length
i = aljabr.vadd(o, aljabr.vmul(dir, 0.25)) # the thickest part is 25% from o
n = aljabr.vmul(dir, 1.0 / len) # the normalized direction
q = aljabr.axisAngleToQuaternion(n, pi / 2.0) # a quaternion to rotate the point p1 to obtain the other points
p1 = aljabr.randomPointFromNormal(n) # a random point in the plane defined by 0,0,0 and n
p1 = aljabr.vmul(aljabr.vnorm(p1), scale) # the point scaled to the thickness
p2 = aljabr.quaternionVectorTransform(q, p1) # the other points
p3 = aljabr.quaternionVectorTransform(q, p2)
p4 = aljabr.quaternionVectorTransform(q, p3)
p1 = aljabr.vadd(i, p1) # translate by i since we were working in the origin
p2 = aljabr.vadd(i, p2)
p3 = aljabr.vadd(i, p3)
p4 = aljabr.vadd(i, p4)
# The 6 vertices
mesh.verts[index].co = o
mesh.verts[index+1].co = p1
mesh.verts[index+2].co = p2
mesh.verts[index+3].co = p3
mesh.verts[index+4].co = p4
mesh.verts[index+5].co = e
def addPrism(mesh, o=[0.0, 0.0, 0.0], e=[0.0, 1.0, 0.0], name='prism'):
fg = mesh.createFaceGroup(name)
dir = aljabr.vsub(e, o) # direction vector from o to e
if dir == [0.0, 0.0, 0.0]:
dir = [0.0, 1.0, 0.0]
len = aljabr.vlen(dir) # distance from o to e
if len == 0:
len = 1
scale = 0.5 # the thickness is 10% of the length
i = aljabr.vadd(o, aljabr.vmul(dir,
0.25)) # the thickest part is 25% from o
n = aljabr.vmul(dir, 1.0 / len) # the normalized direction
q = aljabr.axisAngleToQuaternion(
n, pi /
2.0) # a quaternion to rotate the point p1 to obtain the other points
p = p1 = aljabr.randomPointFromNormal(
n) # a random point in the plane defined by 0,0,0 and n
p1 = aljabr.vmul(aljabr.vnorm(p1),
scale) # the point scaled to the thickness
p2 = aljabr.quaternionVectorTransform(q, p1) # the other points
p3 = aljabr.quaternionVectorTransform(q, p2)
p4 = aljabr.quaternionVectorTransform(q, p3)
p1 = aljabr.vadd(i,
p1) # translate by i since we were working in the origin
p2 = aljabr.vadd(i, p2)
p3 = aljabr.vadd(i, p3)
p4 = aljabr.vadd(i, p4)
# The 6 vertices
v = []
v.append(mesh.createVertex(o)) # 0 0
v.append(mesh.createVertex(p1)) # 1 /|\
v.append(mesh.createVertex(p2)) # 2 /.2.\
v.append(mesh.createVertex(p3)) # 3 1` | `3
v.append(mesh.createVertex(p4)) # 4 \`.4.`/
v.append(mesh.createVertex(e)) # 5 \ | /
# \|/
# 5
# The 8 faces
fg.createFace((v[0], v[1], v[4], v[0]))
fg.createFace((v[0], v[4], v[3], v[0]))
fg.createFace((v[0], v[3], v[2], v[0]))
fg.createFace((v[0], v[2], v[1], v[0]))
fg.createFace((v[5], v[4], v[1], v[5]))
fg.createFace((v[5], v[1], v[2], v[5]))
fg.createFace((v[5], v[2], v[3], v[5]))
fg.createFace((v[5], v[3], v[4], v[5]))
return p
def addPrism(mesh, o=[0.0, 0.0, 0.0], e=[0.0, 1.0, 0.0], name='prism'):
fg = mesh.createFaceGroup(name)
dir = aljabr.vsub(e, o) # direction vector from o to e
if dir == [0.0, 0.0, 0.0]:
dir = [0.0, 1.0, 0.0]
len = aljabr.vlen(dir) # distance from o to e
if len == 0:
len = 1
scale = 0.5 # the thickness is 10% of the length
i = aljabr.vadd(o, aljabr.vmul(dir, 0.25)) # the thickest part is 25% from o
n = aljabr.vmul(dir, 1.0 / len) # the normalized direction
q = aljabr.axisAngleToQuaternion(n, pi / 2.0) # a quaternion to rotate the point p1 to obtain the other points
p = p1 = aljabr.randomPointFromNormal(n) # a random point in the plane defined by 0,0,0 and n
p1 = aljabr.vmul(aljabr.vnorm(p1), scale) # the point scaled to the thickness
p2 = aljabr.quaternionVectorTransform(q, p1) # the other points
p3 = aljabr.quaternionVectorTransform(q, p2)
p4 = aljabr.quaternionVectorTransform(q, p3)
p1 = aljabr.vadd(i, p1) # translate by i since we were working in the origin
p2 = aljabr.vadd(i, p2)
p3 = aljabr.vadd(i, p3)
p4 = aljabr.vadd(i, p4)
# The 6 vertices
v = []
v.append(mesh.createVertex(o)) # 0 0
v.append(mesh.createVertex(p1)) # 1 /|\
v.append(mesh.createVertex(p2)) # 2 /.2.\
v.append(mesh.createVertex(p3)) # 3 1` | `3
v.append(mesh.createVertex(p4)) # 4 \`.4.`/
v.append(mesh.createVertex(e)) # 5 \ | /
# \|/
# 5
# The 8 faces
fg.createFace((v[0], v[1], v[4], v[0]))
fg.createFace((v[0], v[4], v[3], v[0]))
fg.createFace((v[0], v[3], v[2], v[0]))
fg.createFace((v[0], v[2], v[1], v[0]))
fg.createFace((v[5], v[4], v[1], v[5]))
fg.createFace((v[5], v[1], v[2], v[5]))
fg.createFace((v[5], v[2], v[3], v[5]))
fg.createFace((v[5], v[3], v[4], v[5]))
return p
