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bl_info = {
"name": "Triangles",
"description": "Create different types of tirangles.",
"author": "Sjaak-de-Draak",
"version": (1, 0),
"blender": (2, 68, 0),
"location": "View3D > Add > Mesh",
"warning": "First Version", # used for warning icon and text in addons panel
"wiki_url": "http://wiki.blender.org/index.php/Extensions:2.6/Py/"
"Scripts/Triangles",
"tracker_url": "http://projects.blender.org/tracker/index.php?"
"func=detail&aid=<number>",
"category": "Add Mesh"}
"""
This script provides a triangle mesh primitive
and a toolbar menu to further specify settings
"""
import math
import bpy
import mathutils
import types
# make the mathutils Vector type accessible as Vector
Vector=mathutils.Vector
def checkEditMode():
## Check if we are in edit mode
## Returns: 1 if True
## 0 if False
if (bpy.context.active_object.mode == 'EDIT'):
return 1;
return 0;
def exitEditMode():
## Check if we are in edit mode (cuz we don't want this when creating a new Mesh)
## If we are then toggle back to object mode
# Check if there are active objects
if (bpy.context.active_object != None ):
# Only the active object should be in edit mode
if (bpy.context.active_object.mode == 'EDIT'):
bpy.ops.object.editmode_toggle()
class MakeTriangle(bpy.types.Operator):
bl_idname = "mesh.make_triangle"
bl_label = "Triangle"
bl_options = {"REGISTER", "UNDO"}
nothing=0
Ya = 0.0
Xb = 0.0
Xc = 0.0
Vertices = [ ]
Faces = [ ]
triangleTypeList = [('ISOSCELES', "Isosceles", "Two equal sides", 0),
('EQUILATERAL', "Equilateral", "Three equal sides and angles (60°)", 1),
('ISOSCELESRIGHTANGLE', "Isosceles right angled", "90° angle and two equal sides", 2),
('SCALENERIGHTANGLE', "Scalene right angled", "90° angle, no equal sides", 3)]
triangleFaceList = [('DEFAULT', "Normal", "1 Tri(angle) face", 0),
('TRIANGLES', "3 Tri faces", "4 Verticies & 3 Tri(angle) faces", 1),
('QUADS', "3 Quad faces", "7 Verticies & 3 Quad faces", 2),
('SAFEQUADS', "6 Quad faces", "12 Verticies & 6 Quad faces", 3)]
# add definitions for some manipulation buttons
flipX = bpy.props.BoolProperty(name="Flip X sign",
description="Draw on the other side of the X axis (Mirror on Y axis)",
default = False)
flipY = bpy.props.BoolProperty(name="Flip Y sign",
description="Draw on the other side of the Y axis (Mirror on X axis)",
default = False)
scale = bpy.props.FloatProperty(name="Scale",
description="Triangle scale",
default=1.0, min=1.0)
triangleType = bpy.props.EnumProperty(items=triangleTypeList,
name="Type",
description="Triangle Type")
triangleFace = bpy.props.EnumProperty(items=triangleFaceList,
name="Face types",
description="Triangle Face Types")
at_3Dcursor = bpy.props.BoolProperty(name="At 3D Cursor",
description="Draw the triangle where the 3D cursor is",
default = False)
def draw(self, context):
layout = self.layout
row = layout.row(align=True)
row.label(text="Type: ")
row.prop(self, "triangleType", text="")
row = layout.row(align=True)
row.prop(self, "at_3Dcursor", text="3D Cursor")
row.prop(self, "scale")
row = layout.row(align=True)
row.label(text="Face Type: ")
row.prop(self, "triangleFace", text="")
col = layout.column(align=True)
col.prop(self, "flipX")
col.prop(self, "flipY")
#end draw
def drawBasicTriangleShape(self):
# set everything to 0
X = Xa = Xb = Xc = 0.0
Y = Ya = Yb = Yc = 0.0
Z = Za = Zb = Zc = 0.0
scale=self.scale
Xsign = -1 if self.flipX else 1
Ysign = -1 if self.flipY else 1
# Isosceles (2 equal sides)
if ( self.triangleType == 'ISOSCELES' ):
# below a simple triangle containing 2 triangles with 1:2 side ratio
Ya=(1 * Ysign * scale)
A=Vector([0.0, Ya, 0.0])
Xb=(0.5 * Xsign * scale)
B=Vector([Xb, 0.0, 0.0])
Xc=(-0.5 * Xsign * scale)
C=Vector([Xc, 0.0, 0.0])
self.Ya=Ya
self.Xb=Xb
self.Xc=Xc
self.Vertices = [A, B, C,]
return True
# Equilateral (all sides equal)
if ( self.triangleType == 'EQUILATERAL' ):
Ya=(math.sqrt(0.75) * Ysign * scale)
A=Vector([0.0, Ya, 0.0])
Xb=(0.5 * Xsign * scale)
B=Vector([Xb, 0.0, 0.0])
Xc=(-0.5 * Xsign * scale)
C=Vector([Xc, 0.0, 0.0])
self.Ya=Ya
self.Xb=Xb
self.Xc=Xc
self.Vertices = [A, B, C,]
return True
# Isosceles right angled ( 1, 1, sqrt(2) )
if ( self.triangleType == 'ISOSCELESRIGHTANGLE' ):
Ya=(1 * Ysign * scale)
A=Vector([0.0, Ya, 0.0])
Xb=0.0
B=Vector([Xb, 0.0, 0.0])
Xc=(1 * Xsign * scale)
C=Vector([Xc, 0.0, 0.0])
self.Ya=Ya
self.Xb=Xb
self.Xc=Xc
self.Vertices = [A, B, C,]
return True
# Scalene right angled ( 3, 4, 5 )
if ( self.triangleType == 'SCALENERIGHTANGLE' ):
Ya=(1 * Ysign * scale)
A=Vector([0.0, Ya, 0.0])
Xb=0
B=Vector([Xb, 0.0, 0.0])
Xc=(0.75 * Xsign * scale)
C=Vector([Xc, 0.0, 0.0])
self.Ya=Ya
self.Xb=Xb
self.Xc=Xc
self.Vertices = [A, B, C,]
return True
return False
def addFaces(self, fType=None):
Ya=self.Ya
Xb=self.Xb
Xc=self.Xc
if (self.triangleFace == 'DEFAULT'):
self.Faces=[[0,1,2]]
return True
if (self.triangleFace == 'TRIANGLES'):
A=Vector([0.0, Ya, 0.0])
B=Vector([Xb, 0.0, 0.0])
C=Vector([Xc, 0.0, 0.0])
D=Vector([((A.x + B.x + C.x) /3), ((A.y + B.y + C.y) /3), ((A.z + B.z + C.z) /3)])
self.Vertices = [A, B, C, D,]
self.Faces=[[0,1,3], [1,2,3], [2,0,3]]
return True
if (self.triangleFace == 'QUADS'):
A=Vector([0.0, Ya, 0.0])
B=Vector([Xb, 0.0, 0.0])
C=Vector([Xc, 0.0, 0.0])
D=Vector([((A.x + B.x + C.x) /3), ((A.y + B.y + C.y) /3), ((A.z + B.z + C.z) /3)])
AB = A.lerp(B, 0.5)
AC = A.lerp(C, 0.5)
BC = B.lerp(C, 0.5)
self.Vertices = [A, AB, B, BC, C, AC, D,]
self.Faces=[[0,1,6,5], [1,2,3,6], [3,4,5,6]]
return True
if (self.triangleFace == 'SAFEQUADS'):
A=Vector([0.0, Ya, 0.0])
B=Vector([Xb, 0.0, 0.0])
C=Vector([Xc, 0.0, 0.0])
D=Vector([((A.x + B.x + C.x) /3), ((A.y + B.y + C.y) /3), ((A.z + B.z + C.z) /3)])
E = A.lerp(D, 0.5)
AB = A.lerp(B, 0.5)
AC = A.lerp(C, 0.5)
BC = B.lerp(C, 0.5)
AAB = AB.lerp(A, 0.5)
AAC = AC.lerp(A, 0.5)
BBA = AB.lerp(B, 0.5)
BBC = BC.lerp(B, 0.5)
BCC = BC.lerp(C, 0.5)
CCA = AC.lerp(C, 0.5)
self.Vertices = [A, AAB, BBA, B, BBC, BC, BCC, C, CCA, AAC, D, E,]
self.Faces=[[0,1,11,9], [1,2,10,11], [2,3,4,10], [4,5,6,10], [6,7,8,10], [8,9,11,10]]
return True
return False
def action_common(self, context):
# definitions:
# a triangle consists of 3 points: A, B, C
# a 'safer' subdividable triangle consists of 4 points: A, B, C, D
# a subdivide friendly triangle consists of 7 points: A, B, C, D, AB, AC, BC
# a truely subdivide friendly triangle consists of (3x4=)12 points: A, B, C, D, E, BC, AAB, AAC, BBA, BBC, BCC, CCA
BasicShapeCreated=False
ShapeFacesCreated=False
go=0
#
# call the functions for creating the triangles and test if successfull
#
BasicShapeCreated=self.drawBasicTriangleShape()
if (BasicShapeCreated):
ShapeFacesCreated=self.addFaces()
if (ShapeFacesCreated):
go=1
if (go == 1):
NewMesh = bpy.data.meshes.new("Triangle")
NewMesh.from_pydata(self.Vertices, [], self.Faces)
NewMesh.update()
NewObj = bpy.data.objects.new("Triangle", NewMesh)
context.scene.objects.link(NewObj)
# before doing the deselect make sure edit mode isn't active
exitEditMode()
bpy.ops.object.select_all(action = "DESELECT")
NewObj.select = True
context.scene.objects.active = NewObj
if (self.at_3Dcursor == True):
# we'll need to be sure there is actually an object selected
if (NewObj.select == True):
# we also have to check if we're considered to be in 3D View (view3d)
if (bpy.ops.view3d.snap_selected_to_cursor.poll() == True):
bpy.ops.view3d.snap_selected_to_cursor()
else:
# as we weren't considered to be in 3D View
# the object couldn't be moved to the 3D cursor
# so to avoid confusion we change the at_3Dcursor boolean to false
self.at_3Dcursor = False
else:
print("Failed to create triangle: ")
print("Triangle type: %s" % self.triangleType)
print("Face type: %s" % self.triangleFace)
print("Ya: %s" % self.Ya)
print("Xb: %s" % self.Xb)
print("Xc: %s" % self.Xc)
print("Vertices: %s" % self.Vertices)
print("Faces: %s" % self.Faces)
#end action_common
def execute(self, context) :
self.action_common(context)
return {"FINISHED"}
#end execute
def invoke(self, context, event) :
self.action_common(context)
return {"FINISHED"}
#end invoke