From 1dcdfe80a39221844d0b90c5b7ebc625047f9252 Mon Sep 17 00:00:00 2001 From: acspike Date: Sun, 1 Apr 2007 20:58:45 +0000 Subject: [PATCH] be sure to use the sys prefix on exit; provide a resonable message to users who have no numpy; fix whitespace --- share/extensions/perspective.py | 72 +++++++++++++++++---------------- 1 file changed, 38 insertions(+), 34 deletions(-) diff --git a/share/extensions/perspective.py b/share/extensions/perspective.py index 7f95ea227..2f25f6a54 100755 --- a/share/extensions/perspective.py +++ b/share/extensions/perspective.py @@ -19,9 +19,13 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Perspective approach & math by Dmitry Platonov, shadowjack@mail.ru, 2006 """ import sys, inkex, os, re, simplepath, cubicsuperpath -from ffgeom import * -from numpy import * -from numpy.linalg import * +from ffgeom import * +try: + from numpy import * + from numpy.linalg import * +except: + inkex.debug("Failed to import the numpy or numpy.linalg modules. These modules are required by this extension. Please install them and try again.") + sys.exit() uuconv = {'in':90.0, 'pt':1.25, 'px':1, 'mm':3.5433070866, 'cm':35.433070866, 'pc':15.0} def unittouu(string): @@ -43,11 +47,11 @@ def unittouu(string): class Project(inkex.Effect): def __init__(self): - inkex.Effect.__init__(self) + inkex.Effect.__init__(self) def effect(self): if len(self.options.ids) < 2: inkex.debug("Requires two selected paths. The second must be exactly four nodes long.") - exit() + sys.exit() #obj is selected second obj = self.selected[self.options.ids[0]] @@ -55,9 +59,9 @@ class Project(inkex.Effect): if (obj.tagName == 'path' or obj.tagName == 'g') and envelope.tagName == 'path': path = cubicsuperpath.parsePath(envelope.attributes.getNamedItem('d').value) dp = zeros((4,2), dtype=float64) - for i in range(4): + for i in range(4): dp[i][0] = path[0][i][1][0] - dp[i][1] = path[0][i][1][1] + dp[i][1] = path[0][i][1][1] #query inkscape about the bounding box of obj q = {'x':0,'y':0,'width':0,'height':0} @@ -69,28 +73,28 @@ class Project(inkex.Effect): f.close() sp = array([[q['x'], q['y']+q['height']],[q['x'], q['y']],[q['x']+q['width'], q['y']],[q['x']+q['width'], q['y']+q['height']]], dtype=float64) - solmatrix = zeros((8,8), dtype=float64) - free_term = zeros((8), dtype=float64) - for i in (0,1,2,3): - solmatrix[i][0] = sp[i][0] - solmatrix[i][1] = sp[i][1] - solmatrix[i][2] = 1 - solmatrix[i][6] = -dp[i][0]*sp[i][0] - solmatrix[i][7] = -dp[i][0]*sp[i][1] - solmatrix[i+4][3] = sp[i][0] - solmatrix[i+4][4] = sp[i][1] - solmatrix[i+4][5] = 1 - solmatrix[i+4][6] = -dp[i][1]*sp[i][0] - solmatrix[i+4][7] = -dp[i][1]*sp[i][1] - free_term[i] = dp[i][0] - free_term[i+4] = dp[i][1] - - res = solve(solmatrix, free_term) - projmatrix = array([[res[0],res[1],res[2]],[res[3],res[4],res[5]],[res[6],res[7],1.0]],dtype=float64) - if obj.tagName == "path": - self.process_path(obj,projmatrix) - if obj.tagName == "g": - self.process_group(obj,projmatrix) + solmatrix = zeros((8,8), dtype=float64) + free_term = zeros((8), dtype=float64) + for i in (0,1,2,3): + solmatrix[i][0] = sp[i][0] + solmatrix[i][1] = sp[i][1] + solmatrix[i][2] = 1 + solmatrix[i][6] = -dp[i][0]*sp[i][0] + solmatrix[i][7] = -dp[i][0]*sp[i][1] + solmatrix[i+4][3] = sp[i][0] + solmatrix[i+4][4] = sp[i][1] + solmatrix[i+4][5] = 1 + solmatrix[i+4][6] = -dp[i][1]*sp[i][0] + solmatrix[i+4][7] = -dp[i][1]*sp[i][1] + free_term[i] = dp[i][0] + free_term[i+4] = dp[i][1] + + res = solve(solmatrix, free_term) + projmatrix = array([[res[0],res[1],res[2]],[res[3],res[4],res[5]],[res[6],res[7],1.0]],dtype=float64) + if obj.tagName == "path": + self.process_path(obj,projmatrix) + if obj.tagName == "g": + self.process_group(obj,projmatrix) def process_group(self,group,m): @@ -99,8 +103,8 @@ class Project(inkex.Effect): if node.tagName == 'path': self.process_path(node,m) if node.tagName == 'g': - self.process_group(node,m) - + self.process_group(node,m) + def process_path(self,path,m): d = path.attributes.getNamedItem('d') @@ -115,9 +119,9 @@ class Project(inkex.Effect): def project_point(self,p,m): - x = p[0] - y = p[1] - return [(x*m[0][0] + y*m[0][1] + m[0][2])/(x*m[2][0]+y*m[2][1]+m[2][2]),(x*m[1][0] + y*m[1][1] + m[1][2])/(x*m[2][0]+y*m[2][1]+m[2][2])] + x = p[0] + y = p[1] + return [(x*m[0][0] + y*m[0][1] + m[0][2])/(x*m[2][0]+y*m[2][1]+m[2][2]),(x*m[1][0] + y*m[1][1] + m[1][2])/(x*m[2][0]+y*m[2][1]+m[2][2])] e = Project() e.affect() -- 2.30.2