SubGrid33_2Grid64.py

#    This file is part of Silk
#    (c) Edward Mills 2016-2017
#    edwardvmills@gmail.com
#	
#    NURBS Surface modeling tools focused on low degree and seam continuity (FreeCAD Workbench) 
#
#    Silk is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.


from __future__ import division # allows floating point division from integers
import FreeCAD, Part, math
from FreeCAD import Base
from FreeCAD import Gui
import ArachNURBS as AN

# Locate Workbench Directory
import os, Silk_dummy
path_Silk = os.path.dirname(Silk_dummy.__file__)
path_Silk_icons =  os.path.join( path_Silk, 'Resources', 'Icons')

class SubGrid33_2Grid64():
	def Activated(self):
		sel=Gui.Selection.getSelection()

		Grid_a=Gui.Selection.getSelection()[0] 
		Grid_b=Gui.Selection.getSelection()[1]

		a=FreeCAD.ActiveDocument.addObject("Part::FeaturePython","SubGrid33_2Grid64")
		AN.SubGrid33_2Grid64(a,Grid_a,Grid_b)
		a.ViewObject.Proxy=0 # just set it to something different from None (this assignment is needed to run an internal notification)
		a.ViewObject.LineWidth = 1.00
		a.ViewObject.LineColor = (0.67,1.00,1.00)
		a.ViewObject.PointSize = 4.00
		a.ViewObject.PointColor = (0.00,0.33,1.00)
		FreeCAD.ActiveDocument.recompute()

	def GetResources(self):
		toolptip = (
			"\n Select two ControlGrid_64 objects meeting at a corner to generate a corner blend partial grid.\n"
			"(this is a first step in order to fill a four sided hole where four blend grids/surfaces meet) \n"
			"\n"
			"This is intended for the case where the two ControlGrid_64 objects are blend grids which have \n"
			"segments of one common surface as inputs. The two blends 'extend' the common surface, and this \n"
			"partial grid will effectively 'extend' the common surface into the corner gap"
			"\n"
			
			"Input for: \n"
			"-ControlGrid66_4Sub \n"
			"\n"
			"MORE INFO \n"
			"When blending surfaces across perpendicular edges, you end up with a gap/hole at the corner, because \n"
			"you have to 'set back' both blends so they don't overlap each other. This object is a partial grid \n"
			"that extends both input ControlGrid_64s 'into' the gap, beginning the process of filling this gap/hole \n"
			"between the blends. After making four of these objects, one in each corner of the hole, use \n"
			"ControlGrid66_4Sub to create the whole grid. The surface made from this grid (using CubicSurface_66), \n"
			"will then bridge across all four blends, giving good continuity to the orignal surfaces \n")
		
		iconPath = path_Silk_icons + '/SubGrid33_2Grid64.svg'

		return {'Pixmap' :  iconPath,
	  		'MenuText': 'SubGrid33_2Grid64',
			'ToolTip': toolptip}

Gui.addCommand('SubGrid33_2Grid64', SubGrid33_2Grid64())