172 lines
7.0 KiB
Python
172 lines
7.0 KiB
Python
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#!/usr/bin/env python3
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# We will use the inkex module with the predefined Effect base class.
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import inkex
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import math
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from lxml import etree
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objStyle = str(inkex.Style({'stroke': '#000000',
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'stroke-width': 0.1,
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'fill': 'none'
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}))
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class th_inkscape_path:
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def __init__(self, Offset, group, Label=None, Style = None):
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self.offsetX = Offset[0]
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self.offsetY = Offset[1]
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self.Path = ''
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self.group = group
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self.Label = Label
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if Style:
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self.Style = Style
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else:
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self.Style = objStyle
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self.xmin = -self.offsetX
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self.xmax = -self.offsetX
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self.ymin = -self.offsetY
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self.ymax = -self.offsetY
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self.x = 0
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self.y = 0
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def MoveTo(self, x, y):
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#Return string 'M X Y' where X and Y are updated values from parameters
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self.Path += ' M ' + str(round(x-self.offsetX, 3)) + ',' + str(round(y-self.offsetY, 3))
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self.x = x - self.offsetX
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self.y = y - self.offsetY
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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def LineTo(self, x, y):
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#Return string 'L X Y' where X and Y are updated values from parameters
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self.Path += ' L ' + str(round(x-self.offsetX, 3)) + ',' + str(round(y-self.offsetY, 3))
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self.x = x - self.offsetX
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self.y = y - self.offsetY
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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def LineToRel(self, x, y):
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#Return string 'L X Y' where X and Y are updated values from parameters
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self.Path += ' l ' + str(round(x, 3)) + ',' + str(round(y, 3))
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self.x += x
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self.y += y
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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def LineToHRel(self, x):
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#Return string 'h X' where X are updated values from parameters
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self.Path += ' h ' + str(round(x, 3))
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self.x += x
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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def LineToVRel(self, y):
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#Return string 'v Y' where X and Y are updated values from parameters
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self.Path += ' v ' + str(round(y, 3))
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self.y += y
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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def Line(self, x1, y1, x2, y2):
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self.x = x1 - self.offsetX
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self.y = y1 - self.offsetY
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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#Return string M X1 Y1 L X2 Y2
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self.Path += ' M ' + str(round(x1-self.offsetX, 3)) + ',' + str(round(y1-self.offsetY, 3)) + ' L ' + str(round(x2-self.offsetX, 3)) + ',' + str(round(y2-self.offsetY, 3))
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self.x = x2 - self.offsetX
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self.y = y2 - self.offsetY
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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def LineRel(self, x1, y1, x2, y2):
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self.x += x1
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self.y += y1
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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#Return string m X1 Y1 l X2 Y2
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self.Path += ' m ' + str(round(x1, 3)) + ',' + str(round(y1, 3)) + ' l ' + str(round(x2, 3)) + ',' + str(round(y2, 3))
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self.x += x2
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self.y += y2
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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def Bezier(self, xc1, yc1, xc2, yc2, x, y):
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#Return string C XC1 YC1 XC2 YC2 X Y
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self.Path += ' C ' + str(round(xc1-self.offsetX, 3)) + ',' + str(round(yc1-self.offsetY, 3)) + ' ' + str(round(xc2-self.offsetX, 3)) + ',' + str(round(yc2-self.offsetY, 3))+ ' ' + str(round(x-self.offsetX, 3)) + ',' + str(round(y-self.offsetY, 3))
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self.x = x - self.offsetX
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self.y = y - self.offsetY
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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def BezierRel(self, xc1, yc1, xc2, yc2, x, y):
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#Return string c XC1 YC1 XC2 YC2 X Y
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self.Path += ' c ' + str(round(xc1, 3)) + ',' + str(round(yc1, 3)) + ' ' + str(round(xc2, 3)) + ',' + str(round(yc2, 3))+ ' ' + str(round(x, 3)) + ',' + str(round(y, 3))
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self.x += x
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self.y += y
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self.xmin= min(self.x, self.xmin)
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self.xmax= max(self.x, self.xmax)
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self.ymin= min(self.y, self.ymin)
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self.ymax= max(self.y, self.ymax)
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def drawQuarterCircle(self, xc, yc, radius, quarter):
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'''
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Draw a quarter of circle with a single bezier path
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xc, yc give the center of the circle, radius its radius
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quarter = 0 : upper left, 1: upper right, 2: lower right, 3: lower left
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Starting point is the last point of the path
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'''
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if quarter == 0:
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self.Bezier(xc-radius, yc - radius*0.551916, xc - radius*0.551916, yc-radius, xc, yc-radius) # upper left quarter
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elif quarter == 1:
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self.Bezier(xc+radius*0.551916, yc - radius, xc + radius, yc-radius*0.551916, xc+radius, yc) # upper right quarter
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elif quarter == 2:
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self.Bezier(xc+radius, yc + radius*0.551916, xc + radius*0.551916, yc+radius, xc, yc+radius) # lower right quarter
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elif quarter == 3:
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self.Bezier(xc+radius*-0.551916, yc + radius, xc - radius, yc+radius*0.551916, xc-radius, yc) # lower left quarter
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def drawCircle(self, xc, yc, radius):
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#Draw a circle, with 4 Bezier paths
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self.MoveTo(xc+radius, yc) #R, 0
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self.Bezier(xc+radius, yc + radius*0.551916, xc + radius*0.551916, yc+radius, xc, yc+radius) #1er quarter, lower right
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self.Bezier(xc+radius*-0.551916, yc + radius, xc - radius, yc+radius*0.551916, xc-radius, yc) #2nd quarter, lower left
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self.Bezier(xc-radius, yc - radius*0.551916, xc - radius*0.551916, yc-radius, xc, yc-radius) #3rd quarter, upper left
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self.Bezier(xc+radius*0.551916, yc - radius, xc + radius, yc-radius*0.551916, xc+radius, yc) #4th quarter, upper right
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def Close(self):
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self.Path += ' z'
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def GenPath(self):
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if self.Label:
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line_attribs = {'style': self.Style, 'id' : self.Label, 'd': self.Path}
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else:
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line_attribs = {'style': self.Style, 'd': self.Path}
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etree.SubElement(self.group, inkex.addNS('path', 'svg'), line_attribs)
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def GetBoundingBox(self):
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'''
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return a tuple giving MinPos, MaxPos and Size (6 elements)
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'''
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return(self.xmin, self.ymin, self.xmax, self.ymax, self.xmax - self.xmin, self.ymax - self.ymin)
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