Added Another Perspective
This commit is contained in:
Mario Voigt
parent
904581fdf1
commit
2817a7164a
16
extensions/fablabchemnitz_anotherperspective.inx
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extensions/fablabchemnitz_anotherperspective.inx
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<?xml version="1.0" encoding="UTF-8"?>
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<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
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<name>Another Perspective</name>
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<id>fablabchemnitz.de.anotherperspective</id>
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<effect>
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<object-type>path</object-type>
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<effects-menu>
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<submenu name="FabLab Chemnitz">
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<submenu name="Modify existing Path(s)"/>
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</submenu>
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</effects-menu>
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</effect>
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<script>
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<command location="inx" interpreter="python">fablabchemnitz_anotherperspective.py</command>
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</script>
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</inkscape-extension>
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312
extensions/fablabchemnitz_anotherperspective.py
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extensions/fablabchemnitz_anotherperspective.py
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#!/usr/bin/env python3
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"""
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Copyright (C) 2017 Corentin Brulé
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Special thanks and orignal copyrigths : Aaron Spike (2005) and Timo Kähkönen (2012)
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"""
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import inkex
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import re
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from lxml import etree
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from inkex.transforms import Transform
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from inkex.paths import Path, CubicSuperPath
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__version__ = '0.1'
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debug=False
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def distort_path(path_str,source,destination):
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path_arr = path_string_to_array(path_str)
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subpath_type=""
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is_num =""
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xy_counter =""
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xy=""
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path_arr2=[]
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subpath_type_upper=""
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point=""
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i=0
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for i in range(len(path_arr)):
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patt1 = r"[mzlhvcsqta]"
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curr = path_arr[i]
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if re.match(patt1,curr,flags=re.I):
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xy_counter = -1
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subpath_type = curr
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subpath_type_upper = subpath_type.upper()
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is_num = False
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path_arr2.append(curr)
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else :
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is_num = True
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curr = float(curr)
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if xy_counter%2 == 0:
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xy="x"
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else:
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xy="y"
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if is_num :
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if xy=="y" :
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point = transferPoint(float(path_arr[i-1]),curr,source,destination)
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path_arr2.append(point["x"])
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path_arr2.append(point["y"])
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xy_counter+=1
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path_str = path_array_to_string(path_arr2)
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return path_str
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def path_array_to_string(path_arr):
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path_str=str(path_arr)
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path_str=path_str.replace(r"([0-9]),([-0-9])", "$1 $2")
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path_str=path_str.replace(r"([0-9]),([-0-9])", "$1 $2")
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path_str=path_str.replace(",", "")
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path_str=path_str.replace("[", "").replace("]","")
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path_str=path_str.replace("'", "")
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return path_str
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def path_string_to_array(path_str):
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patt1=r"[mzlhvcsqta]|-?[0-9.]+" #gi
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#path_arr=path_str.match(patt1) #array de résultats
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path_arr = re.findall(patt1,path_str,flags=re.I)
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patt1=r"[mzlhvcsqta]" #i
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i = 0
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for i in range(len(path_arr)):
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if re.match(path_arr[i],patt1,flags=re.I) == -1:
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path_arr[i] = float(path_arr[i])
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return path_arr
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'''
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def isPermissible(p):
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p0 = {x:c0.attr("cx"),y:c0.attr("cy")}
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p1 = {x:c1.attr("cx"),y:c1.attr("cy")}
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p2 = {x:c2.attr("cx"),y:c2.attr("cy")}
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p3 = {x:c3.attr("cx"),y:c3.attr("cy")}
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a0 = angle(p3, p0, p1)
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a1 = angle(p0, p1, p2)
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a2 = angle(p1, p2, p3)
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a3 = angle(p2, p3, p0)
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if not (a0 > 0 and a0 < 180) or not (a1 > 0 and a1 < 180) or not(a2 > 0 and a2 < 180) or not(a3 > 0 and a3 < 180) :
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return False
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else :
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return True
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}
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def angle(c, b, a):
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ab = {x: b.x - a.x, y: b.y - a.y }
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cb = {x: b.x - c.x, y: b.y - c.y }
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dot = (ab.x * cb.x + ab.y * cb.y)
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cross = (ab.x * cb.y - ab.y * cb.x)
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alpha = Math.atan2(cross, dot)
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return alpha * 180 / PI
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}
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'''
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def transferPoint (xI, yI, source, destination):
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ADDING = 0.001 # to avoid dividing by zero
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xA = source[0]["x"]
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yA = source[0]["y"]
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xC = source[2]["x"]
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yC = source[2]["y"]
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xAu = destination[0]["x"]
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yAu = destination[0]["y"]
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xBu = destination[1]["x"]
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yBu = destination[1]["y"]
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xCu = destination[2]["x"]
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yCu = destination[2]["y"]
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xDu = destination[3]["x"]
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yDu = destination[3]["y"]
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# Calcultations
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if xBu==xCu :
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xCu+=ADDING
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if xAu==xDu :
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xDu+=ADDING
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if xAu==xBu :
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xBu+=ADDING
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if xDu==xCu :
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xCu+=ADDING
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kBC = float(yBu-yCu)/float(xBu-xCu)
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kAD = float(yAu-yDu)/float(xAu-xDu)
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kAB = float(yAu-yBu)/float(xAu-xBu)
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kDC = float(yDu-yCu)/float(xDu-xCu)
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if kBC==kAD :
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kAD += ADDING
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xE = float(kBC*xBu - kAD*xAu + yAu - yBu) / float(kBC-kAD)
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yE = kBC*(xE - xBu) + yBu
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if kAB==kDC :
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kDC += ADDING
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xF = float(kAB*xBu - kDC*xCu + yCu - yBu) / float(kAB-kDC)
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yF = kAB*(xF - xBu) + yBu
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if xE==xF :
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xF += ADDING
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kEF = float(yE-yF) / float(xE-xF)
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if kEF==kAB:
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kAB += ADDING
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xG = float(kEF*xDu - kAB*xAu + yAu - yDu) / float(kEF-kAB)
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yG = kEF*(xG - xDu) + yDu
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if kEF==kBC :
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kBC+=ADDING
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xH = float(kEF*xDu - kBC*xBu + yBu - yDu) / float(kEF-kBC)
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yH = kEF*(xH - xDu) + yDu
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rG = float(yC-yI)/float(yC-yA)
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rH = float(xI-xA)/float(xC-xA)
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xJ = (xG-xDu)*rG + xDu
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yJ = (yG-yDu)*rG + yDu
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xK = (xH-xDu)*rH + xDu
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yK = (yH-yDu)*rH + yDu
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if xF==xJ:
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xJ+=ADDING
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if xE==xK:
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xK+=ADDING
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kJF = float(yF-yJ) / float(xF-xJ)
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kKE = float(yE-yK) / float(xE-xK)
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xKE = ""
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if kJF==kKE:
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kKE += ADDING
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xIu = float(kJF*xF - kKE*xE + yE - yF) / float(kJF-kKE)
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yIu = kJF * (xIu - xJ) + yJ
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b = {"x":xIu,"y":yIu}
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b["x"] = round(b["x"])
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b["y"] = round(b["y"])
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return b
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def projection(path_object,coords):
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pp_object = Path(path_object).to_arrays()
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bounds = Path(path_object).bounding_box()
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# Make array of coordinates, every array member represent corner of text path
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source = [
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{"x":bounds.left,"y":bounds.top},
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{"x":bounds.right,"y":bounds.top},
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{"x":bounds.right,"y":bounds.bottom},
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{"x":bounds.left,"y":bounds.bottom}
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]
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destination=[
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{"x":coords[0][0],"y":coords[0][1]},
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{"x":coords[1][0],"y":coords[1][1]},
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{"x":coords[2][0],"y":coords[2][1]},
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{"x":coords[3][0],"y":coords[3][1]}
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]
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path_destination = distort_path(path_object,source,destination)
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return path_destination
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'''
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def complex2tulpe(complexNb):
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return (complexNb.real,complexNb.imag)
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'''
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class AnotherPerspective(inkex.Effect):
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def __init__(self):
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inkex.Effect.__init__(self)
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def envelope2coords(self,path_envelope):
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pp_envelope = CubicSuperPath(path_envelope)
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# inkex.debug(pp_envelope)
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c0 = pp_envelope[0][0][0]
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c1 = pp_envelope[0][1][0]
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c2 = pp_envelope[0][2][0]
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c3 = pp_envelope[0][3][0]
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# inkex.debug(str(c0)+" "+str(c1)+" "+str(c2)+" "+str(c3))
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return [c0,c1,c2,c3]
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def effect(self):
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if len(self.options.ids) < 2:
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inkex.errormsg(_("This extension requires two selected paths."))
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exit()
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obj = self.svg.selected[self.options.ids[0]]
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envelope = self.svg.selected[self.options.ids[1]]
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if obj.get(inkex.addNS('type','sodipodi')):
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inkex.errormsg(_("The first selected object is of type '%s'.\nTry using the procedure Path->Object to Path." % obj.get(inkex.addNS('type','sodipodi'))))
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exit()
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if obj.tag == inkex.addNS('path','svg') or obj.tag == inkex.addNS('g','svg'):
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if envelope.tag == inkex.addNS('path','svg'):
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mat = envelope.transform * Transform([[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
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path = CubicSuperPath(envelope.get('d'))
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Path(path).transform(mat)
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absolute_envelope_path = envelope.get('d')
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# inkex.debug(absolute_envelope_path)
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coords_to_project = self.envelope2coords(absolute_envelope_path)
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if obj.tag == inkex.addNS('path','svg'):
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mat = obj.transform * Transform([[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
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absolute_d = str(Path(obj.get('d')))
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path = CubicSuperPath(absolute_d)
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Path(path).transform(mat)
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absolute_object_path = str(path)
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# inkex.debug(absolute_object_path)
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elif obj.tag == inkex.addNS('g','svg'):
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absolute_object_path=""
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for p in obj.iterfind(".//{http://www.w3.org/2000/svg}path"):
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absolute_d = str(sPath(p.get('d')))
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mat = p.transform * Transform([[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
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path = CubicSuperPath(absolute_d)
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Path(path).transform(mat)
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absolute_object_path += Path(path)
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# inkex.debug(absolute_object_path)
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new_path = projection(absolute_object_path,coords_to_project)
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attributes = {'d':new_path}
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new_element = etree.SubElement(self.svg.get_current_layer(),inkex.addNS('path','svg'),attributes)
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else:
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if envelope.tag == inkex.addNS('g','svg'):
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inkex.errormsg("The second selected object is a group, not a path.\nTry using the procedure Object->Ungroup.")
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else:
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inkex.errormsg("The second selected object is not a path.\nTry using the procedure Path->Object to Path.")
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exit()
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else:
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inkex.errormsg("The first selected object is not a path.\nTry using the procedure Path->Object to Path.")
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exit()
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AnotherPerspective().run()
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Block a user