1 #define INKSCAPE_LPE_LATTICE_CPP
2 /** \file
3 * LPE <lattice> implementation
5 */
6 /*
7 * Authors:
8 * Johan Engelen <j.b.c.engelen@utwente.nl>
9 * Steren Giannini
10 * NoƩ Falzon
11 * Victor Navez
12 *
13 * Copyright (C) 2007-2008 Authors
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #include "live_effects/lpe-lattice.h"
20 #include "sp-shape.h"
21 #include "sp-item.h"
22 #include "sp-path.h"
23 #include "display/curve.h"
24 #include "svg/svg.h"
25 #include "nodepath.h"
27 #include <2geom/sbasis.h>
28 #include <2geom/sbasis-2d.h>
29 #include <2geom/sbasis-geometric.h>
30 #include <2geom/bezier-to-sbasis.h>
31 #include <2geom/sbasis-to-bezier.h>
32 #include <2geom/d2.h>
33 #include <2geom/piecewise.h>
34 #include <2geom/transforms.h>
36 #include "desktop.h" // TODO: should be factored out (see below)
38 using namespace Geom;
40 namespace Inkscape {
41 namespace LivePathEffect {
43 LPELattice::LPELattice(LivePathEffectObject *lpeobject) :
44 Effect(lpeobject),
46 // initialise your parameters here:
47 grid_point0(_("Control handle 0"), _("Control handle 0"), "gridpoint0", &wr, this),
48 grid_point1(_("Control handle 1"), _("Control handle 1"), "gridpoint1", &wr, this),
49 grid_point2(_("Control handle 2"), _("Control handle 2"), "gridpoint2", &wr, this),
50 grid_point3(_("Control handle 3"), _("Control handle 3"), "gridpoint3", &wr, this),
51 grid_point4(_("Control handle 4"), _("Control handle 4"), "gridpoint4", &wr, this),
52 grid_point5(_("Control handle 5"), _("Control handle 5"), "gridpoint5", &wr, this),
53 grid_point6(_("Control handle 6"), _("Control handle 6"), "gridpoint6", &wr, this),
54 grid_point7(_("Control handle 7"), _("Control handle 7"), "gridpoint7", &wr, this),
55 grid_point8(_("Control handle 8"), _("Control handle 8"), "gridpoint8", &wr, this),
56 grid_point9(_("Control handle 9"), _("Control handle 9"), "gridpoint9", &wr, this),
57 grid_point10(_("Control handle 10"), _("Control handle 10"), "gridpoint10", &wr, this),
58 grid_point11(_("Control handle 11"), _("Control handle 11"), "gridpoint11", &wr, this),
59 grid_point12(_("Control handle 12"), _("Control handle 12"), "gridpoint12", &wr, this),
60 grid_point13(_("Control handle 13"), _("Control handle 13"), "gridpoint13", &wr, this),
61 grid_point14(_("Control handle 14"), _("Control handle 14"), "gridpoint14", &wr, this),
62 grid_point15(_("Control handle 15"), _("Control handle 15"), "gridpoint15", &wr, this)
64 {
65 // register all your parameters here, so Inkscape knows which parameters this effect has:
66 registerParameter( dynamic_cast<Parameter *>(&grid_point0) );
67 registerParameter( dynamic_cast<Parameter *>(&grid_point1) );
68 registerParameter( dynamic_cast<Parameter *>(&grid_point2) );
69 registerParameter( dynamic_cast<Parameter *>(&grid_point3) );
70 registerParameter( dynamic_cast<Parameter *>(&grid_point4) );
71 registerParameter( dynamic_cast<Parameter *>(&grid_point5) );
72 registerParameter( dynamic_cast<Parameter *>(&grid_point6) );
73 registerParameter( dynamic_cast<Parameter *>(&grid_point7) );
74 registerParameter( dynamic_cast<Parameter *>(&grid_point8) );
75 registerParameter( dynamic_cast<Parameter *>(&grid_point9) );
76 registerParameter( dynamic_cast<Parameter *>(&grid_point10) );
77 registerParameter( dynamic_cast<Parameter *>(&grid_point11) );
78 registerParameter( dynamic_cast<Parameter *>(&grid_point12) );
79 registerParameter( dynamic_cast<Parameter *>(&grid_point13) );
80 registerParameter( dynamic_cast<Parameter *>(&grid_point14) );
81 registerParameter( dynamic_cast<Parameter *>(&grid_point15) );
84 }
86 LPELattice::~LPELattice()
87 {
89 }
92 Geom::Piecewise<Geom::D2<Geom::SBasis> >
93 LPELattice::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
94 {
95 D2<SBasis2d> sb2;
97 //Initialisation of the sb2
98 for(unsigned dim = 0; dim < 2; dim++) {
99 sb2[dim].us = 2;
100 sb2[dim].vs = 2;
101 const int depth = sb2[dim].us*sb2[dim].vs;
102 sb2[dim].resize(depth, Linear2d(0));
103 }
105 //Grouping the point params in a convenient vector
106 std::vector<Geom::Point *> handles(16);
108 handles[0] = &grid_point0;
109 handles[1] = &grid_point1;
110 handles[2] = &grid_point2;
111 handles[3] = &grid_point3;
112 handles[4] = &grid_point4;
113 handles[5] = &grid_point5;
114 handles[6] = &grid_point6;
115 handles[7] = &grid_point7;
116 handles[8] = &grid_point8;
117 handles[9] = &grid_point9;
118 handles[10] = &grid_point10;
119 handles[11] = &grid_point11;
120 handles[12] = &grid_point12;
121 handles[13] = &grid_point13;
122 handles[14] = &grid_point14;
123 handles[15] = &grid_point15;
125 Geom::Point origin = Geom::Point(boundingbox_X.min(),boundingbox_Y.min());
127 double width = boundingbox_X.extent();
128 double height = boundingbox_Y.extent();
130 //numbering is based on 4 rectangles.
131 for(unsigned dim = 0; dim < 2; dim++) {
132 Geom::Point dir(0,0);
133 dir[dim] = 1;
134 for(unsigned vi = 0; vi < sb2[dim].vs; vi++) {
135 for(unsigned ui = 0; ui < sb2[dim].us; ui++) {
136 for(unsigned iv = 0; iv < 2; iv++) {
137 for(unsigned iu = 0; iu < 2; iu++) {
138 unsigned corner = iu + 2*iv;
139 unsigned i = ui + vi*sb2[dim].us;
141 //This is the offset from the Upperleft point
142 Geom::Point base( (ui + iu*(3-2*ui))*width/3.,
143 (vi + iv*(3-2*vi))*height/3.);
145 //Special action for corners
146 if(vi == 0 && ui == 0) {
147 base = Geom::Point(0,0);
148 }
150 // i = Upperleft corner of the considerated rectangle
151 // corner = actual corner of the rectangle
152 // origin = Upperleft point
153 double dl = dot((*handles[corner+4*i] - (base + origin)), dir)/dot(dir,dir);
154 sb2[dim][i][corner] = dl/( dim ? height : width )*pow(4.0,ui+vi);
155 }
156 }
157 }
158 }
159 }
161 Piecewise<D2<SBasis> > output;
162 output.push_cut(0.);
163 for(unsigned i = 0; i < pwd2_in.size(); i++) {
164 D2<SBasis> B = pwd2_in[i];
165 B -= origin;
166 B*= 1/width;
167 //Here comes the magic
168 D2<SBasis> tB = compose_each(sb2,B);
169 tB = tB * width + origin;
171 output.push(tB,i+1);
172 }
174 return output;
175 }
177 void
178 LPELattice::doBeforeEffect (SPLPEItem *lpeitem)
179 {
180 original_bbox(lpeitem);
181 }
183 void
184 LPELattice::resetDefaults(SPItem * item)
185 {
186 original_bbox(SP_LPE_ITEM(item), false);
188 // place the 16 control points
189 grid_point0[Geom::X] = boundingbox_X.min();
190 grid_point0[Geom::Y] = boundingbox_Y.min();
192 grid_point1[Geom::X] = boundingbox_X.max();
193 grid_point1[Geom::Y] = boundingbox_Y.min();
195 grid_point2[Geom::X] = boundingbox_X.min();
196 grid_point2[Geom::Y] = boundingbox_Y.max();
198 grid_point3[Geom::X] = boundingbox_X.max();
199 grid_point3[Geom::Y] = boundingbox_Y.max();
201 grid_point4[Geom::X] = 1.0/3*boundingbox_X.max()+2.0/3*boundingbox_X.min();
202 grid_point4[Geom::Y] = boundingbox_Y.min();
204 grid_point5[Geom::X] = 2.0/3*boundingbox_X.max()+1.0/3*boundingbox_X.min();
205 grid_point5[Geom::Y] = boundingbox_Y.min();
207 grid_point6[Geom::X] = 1.0/3*boundingbox_X.max()+2.0/3*boundingbox_X.min();
208 grid_point6[Geom::Y] = boundingbox_Y.max();
210 grid_point7[Geom::X] = 2.0/3*boundingbox_X.max()+1.0/3*boundingbox_X.min();
211 grid_point7[Geom::Y] = boundingbox_Y.max();
213 grid_point8[Geom::X] = boundingbox_X.min();
214 grid_point8[Geom::Y] = 1.0/3*boundingbox_Y.max()+2.0/3*boundingbox_Y.min();
216 grid_point9[Geom::X] = boundingbox_X.max();
217 grid_point9[Geom::Y] = 1.0/3*boundingbox_Y.max()+2.0/3*boundingbox_Y.min();
219 grid_point10[Geom::X] = boundingbox_X.min();
220 grid_point10[Geom::Y] = 2.0/3*boundingbox_Y.max()+1.0/3*boundingbox_Y.min();
222 grid_point11[Geom::X] = boundingbox_X.max();
223 grid_point11[Geom::Y] = 2.0/3*boundingbox_Y.max()+1.0/3*boundingbox_Y.min();
225 grid_point12[Geom::X] = 1.0/3*boundingbox_X.max()+2.0/3*boundingbox_X.min();
226 grid_point12[Geom::Y] = 1.0/3*boundingbox_Y.max()+2.0/3*boundingbox_Y.min();
228 grid_point13[Geom::X] = 2.0/3*boundingbox_X.max()+1.0/3*boundingbox_X.min();
229 grid_point13[Geom::Y] = 1.0/3*boundingbox_Y.max()+2.0/3*boundingbox_Y.min();
231 grid_point14[Geom::X] = 1.0/3*boundingbox_X.max()+2.0/3*boundingbox_X.min();
232 grid_point14[Geom::Y] = 2.0/3*boundingbox_Y.max()+1.0/3*boundingbox_Y.min();
234 grid_point15[Geom::X] = 2.0/3*boundingbox_X.max()+1.0/3*boundingbox_X.min();
235 grid_point15[Geom::Y] = 2.0/3*boundingbox_Y.max()+1.0/3*boundingbox_Y.min();
236 }
238 /**
239 void
240 LPELattice::addHelperPathsImpl(SPLPEItem *lpeitem, SPDesktop *desktop)
241 {
242 SPCurve *c = new SPCurve ();
243 c->moveto(grid_point0);
244 c->lineto(grid_point4);
245 c->lineto(grid_point5);
246 c->lineto(grid_point1);
248 c->moveto(grid_point8);
249 c->lineto(grid_point12);
250 c->lineto(grid_point13);
251 c->lineto(grid_point9);
253 c->moveto(grid_point10);
254 c->lineto(grid_point14);
255 c->lineto(grid_point15);
256 c->lineto(grid_point11);
258 c->moveto(grid_point2);
259 c->lineto(grid_point6);
260 c->lineto(grid_point7);
261 c->lineto(grid_point3);
264 c->moveto(grid_point0);
265 c->lineto(grid_point8);
266 c->lineto(grid_point10);
267 c->lineto(grid_point2);
269 c->moveto(grid_point4);
270 c->lineto(grid_point12);
271 c->lineto(grid_point14);
272 c->lineto(grid_point6);
274 c->moveto(grid_point5);
275 c->lineto(grid_point13);
276 c->lineto(grid_point15);
277 c->lineto(grid_point7);
279 c->moveto(grid_point1);
280 c->lineto(grid_point9);
281 c->lineto(grid_point11);
282 c->lineto(grid_point3);
284 // TODO: factor this out (and remove the #include of desktop.h above)
285 SPCanvasItem *canvasitem = sp_nodepath_generate_helperpath(desktop, c, SP_ITEM(lpeitem), 0x009000ff);
286 Inkscape::Display::TemporaryItem* tmpitem = desktop->add_temporary_canvasitem (canvasitem, 0);
287 lpeitem->lpe_helperpaths.push_back(tmpitem);
289 c->unref();
290 }
291 **/
293 /* ######################## */
295 } //namespace LivePathEffect
296 } /* namespace Inkscape */
298 /*
299 Local Variables:
300 mode:c++
301 c-file-style:"stroustrup"
302 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
303 indent-tabs-mode:nil
304 fill-column:99
305 End:
306 */
307 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :