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1 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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2 | // |
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3 | // This file is part of Open CASCADE Technology software library. |
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4 | // |
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5 | // This library is free software; you can redistribute it and/or modify it under |
6 | // the terms of the GNU Lesser General Public License version 2.1 as published |
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7 | // by the Free Software Foundation, with special exception defined in the file |
8 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
9 | // distribution for complete text of the license and disclaimer of any warranty. |
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10 | // |
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11 | // Alternatively, this file may be used under the terms of Open CASCADE |
12 | // commercial license or contractual agreement. |
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13 | |
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14 | /*********************************************************************** |
15 | |
16 | V3d_PositionLight.cxx |
17 | Created: 30-03-98 ZOV (ZELENKOV Oleg) |
18 | |
19 | ************************************************************************/ |
20 | |
21 | #include <V3d.hxx> |
22 | #include <V3d_PositionLight.ixx> |
23 | #include <Graphic3d_Vector.hxx> |
24 | #include <Graphic3d_Vertex.hxx> |
25 | #include <Graphic3d_Structure.hxx> |
26 | #include <Graphic3d_Group.hxx> |
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27 | #include <Graphic3d_ArrayOfSegments.hxx> |
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28 | #include <Graphic3d_AspectMarker3d.hxx> |
29 | #include <Graphic3d_AspectLine3d.hxx> |
30 | #include <Graphic3d_AspectText3d.hxx> |
31 | #include <V3d_SpotLight.hxx> |
32 | #include <Visual3d_Light.hxx> |
33 | #include <Visual3d_ViewManager.hxx> |
34 | #include <Visual3d_ContextPick.hxx> |
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35 | #include <V3d_BadValue.hxx> |
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36 | #include <gp_Dir.hxx> |
37 | #include <gp_Ax1.hxx> |
38 | #include <gp_Vec.hxx> |
39 | #include <gp_Pnt.hxx> |
40 | #include <gp_Trsf.hxx> |
41 | #include <TCollection_AsciiString.hxx> |
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42 | |
43 | V3d_PositionLight::V3d_PositionLight(const Handle(V3d_Viewer)& VM) : V3d_Light(VM) { |
44 | } |
45 | |
46 | void V3d_PositionLight::SetTarget(const Standard_Real X, const Standard_Real Y, const Standard_Real Z) { |
47 | |
48 | Standard_Real Xc,Yc,Zc, Xp,Yp,Zp; |
49 | |
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50 | // Recalculation of the position |
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51 | MyTarget.Coord(Xc,Yc,Zc); |
52 | Position (Xp,Yp,Zp) ; |
53 | |
54 | Xp = Xp + (X - Xc); |
55 | Yp = Yp + (Y - Yc); |
56 | Zp = Zp + (Z - Zc); |
57 | |
58 | // Affectation |
59 | MyTarget.SetCoord(X,Y,Z); |
60 | SetPosition(Xp,Yp,Zp) ; |
61 | } |
62 | |
63 | void V3d_PositionLight::SetRadius(const Standard_Real Radius) { |
64 | |
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65 | V3d_BadValue_Raise_if( Radius <= 0. , "V3d_PositionLight::SetRadius, bad radius"); |
66 | V3d_BadValue_Raise_if( MyType == V3d_DIRECTIONAL , "V3d_PositionLight::SetRadius, bad light type"); |
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67 | |
68 | Standard_Real X0,Y0,Z0, Xn,Yn,Zn, Xp,Yp,Zp; |
69 | |
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70 | // The target point remains unchanged, only the position of the light is modified |
71 | // by preserving the direction. |
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72 | Position (Xp,Yp,Zp); |
73 | Graphic3d_Vector D(MyTarget, Graphic3d_Vertex(Xp, Yp, Zp)); |
74 | D.Normalize(); |
75 | D.Coord(Xn,Yn,Zn); |
76 | MyTarget.Coord(X0,Y0,Z0); |
77 | Xn = X0 + Radius*Xn; |
78 | Yn = Y0 + Radius*Yn; |
79 | Zn = Z0 + Radius*Zn; |
80 | |
81 | SetPosition(Xn,Yn,Zn) ; |
82 | } |
83 | |
84 | void V3d_PositionLight::OnHideFace(const Handle(V3d_View)& aView) { |
85 | |
86 | Standard_Real Xp,Yp,Zp, X,Y,Z, VX,VY,VZ; |
87 | |
88 | Position (Xp,Yp,Zp); |
89 | V3d_Light::SymetricPointOnSphere (aView, |
90 | MyTarget, Graphic3d_Vertex(Xp,Yp,Yp), Radius(), X,Y,Z, VX,VY,VZ); |
91 | |
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92 | // This is a visible point |
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93 | if ((VX*(X-Xp) < 0.) && (VY*(Y-Yp) < 0.) && (VZ*(Z-Zp) < 0.)) |
94 | SetPosition (X,Y,Z); |
95 | } |
96 | |
97 | void V3d_PositionLight::OnSeeFace(const Handle(V3d_View)& aView) { |
98 | |
99 | Standard_Real Xp,Yp,Zp, X,Y,Z, VX,VY,VZ; |
100 | |
101 | Position (Xp,Yp,Zp); |
102 | V3d_Light::SymetricPointOnSphere (aView, |
103 | MyTarget, Graphic3d_Vertex(Xp,Yp,Yp), Radius(), X,Y,Z, VX,VY,VZ); |
104 | |
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105 | // This is a hidden point |
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106 | if ((VX*(X-Xp) > 0.) && (VY*(Y-Yp) > 0.) && (VZ*(Z-Zp) > 0.)) |
107 | SetPosition (X,Y,Z); |
108 | } |
109 | |
110 | Standard_Boolean V3d_PositionLight::SeeOrHide(const Handle(V3d_View)& aView) const { |
111 | |
112 | Standard_Real Xp,Yp,Zp, X,Y,Z, VX,VY,VZ; |
113 | |
114 | Position (Xp,Yp,Zp); |
115 | V3d_Light::SymetricPointOnSphere (aView, |
116 | MyTarget, Graphic3d_Vertex(Xp,Yp,Yp), Radius(), X,Y,Z, VX,VY,VZ); |
117 | |
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118 | // Is it a visible or a hidden point |
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119 | return ( (VX*(X-Xp) > 0.) || (VY*(Y-Yp) > 0.) || (VZ*(Z-Zp) > 0.) )? |
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120 | // the source is on the hidden face |
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121 | Standard_False: |
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122 | // the source is on the visible face. |
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123 | Standard_True; |
124 | } |
125 | |
126 | void V3d_PositionLight::Target(Standard_Real& Xp, Standard_Real& Yp, Standard_Real& Zp)const { |
127 | |
128 | MyTarget.Coord(Xp,Yp,Zp) ; |
129 | } |
130 | |
131 | void V3d_PositionLight::Display( const Handle(V3d_View)& aView, |
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132 | const V3d_TypeOfRepresentation TPres ) |
133 | { |
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134 | Graphic3d_Vertex PText ; |
135 | Standard_Real X,Y,Z,Rayon; |
136 | Standard_Real X0,Y0,Z0,VX,VY,VZ; |
137 | Standard_Real X1,Y1,Z1; |
138 | Standard_Real DXRef,DYRef,DZRef,DXini,DYini,DZini; |
139 | Standard_Real R1,G1,B1; |
140 | V3d_TypeOfRepresentation Pres; |
141 | V3d_TypeOfUpdate UpdSov; |
142 | |
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143 | // Creation of a structure of markable elements (position of the |
144 | // light, and the domain of lighting represented by a circle) |
145 | // Creation of a structure snopick of non-markable elements (target, meridian and |
146 | // parallel). |
147 | |
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148 | Pres = TPres; |
149 | Handle(V3d_Viewer) TheViewer = aView->Viewer(); |
150 | UpdSov = TheViewer->UpdateMode(); |
151 | TheViewer->SetUpdateMode(V3d_WAIT); |
152 | if (!MyGraphicStructure.IsNull()) { |
153 | MyGraphicStructure->Disconnect(MyGraphicStructure1); |
154 | MyGraphicStructure->Clear(); |
155 | MyGraphicStructure1->Clear(); |
156 | if (Pres == V3d_SAMELAST) Pres = MyTypeOfRepresentation; |
157 | } |
158 | else { |
159 | if (Pres == V3d_SAMELAST) Pres = V3d_SIMPLE; |
160 | Handle(Graphic3d_Structure) slight = new Graphic3d_Structure(TheViewer->Viewer()); |
161 | MyGraphicStructure = slight; |
162 | Handle(Graphic3d_Structure) snopick = new Graphic3d_Structure(TheViewer->Viewer()); |
163 | MyGraphicStructure1 = snopick; |
164 | } |
165 | |
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166 | Handle(Graphic3d_Group) gradius, gExtArrow, gIntArrow; |
167 | if (MyType != V3d_DIRECTIONAL |
168 | && Pres == V3d_COMPLETE) |
169 | { |
170 | gradius = MyGraphicStructure->NewGroup(); |
171 | gExtArrow = MyGraphicStructure->NewGroup(); |
172 | gIntArrow = MyGraphicStructure->NewGroup(); |
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173 | } |
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174 | Handle(Graphic3d_Group) glight = MyGraphicStructure->NewGroup(); |
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175 | Handle(Graphic3d_Group) gsphere; |
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176 | if (Pres == V3d_COMPLETE |
177 | || Pres == V3d_PARTIAL) |
178 | { |
179 | gsphere = MyGraphicStructure->NewGroup(); |
180 | } |
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181 | |
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182 | Handle(Graphic3d_Group) gnopick = MyGraphicStructure1->NewGroup(); |
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183 | |
184 | X0 = MyTarget.X(); |
185 | Y0 = MyTarget.Y(); |
186 | Z0 = MyTarget.Z(); |
187 | |
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188 | // Display of the light position. |
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189 | |
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190 | this->Color(Quantity_TOC_RGB,R1,G1,B1); |
191 | Quantity_Color Col1(R1,G1,B1,Quantity_TOC_RGB); |
192 | Handle(Graphic3d_AspectLine3d) Asp1 = new Graphic3d_AspectLine3d(); |
193 | Asp1->SetColor(Col1); |
194 | glight->SetPrimitivesAspect(Asp1); |
195 | this->Symbol(glight,aView); |
196 | |
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197 | // Display of the marking sphere (limit at the circle). |
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198 | |
199 | if (Pres == V3d_COMPLETE || Pres == V3d_PARTIAL) { |
200 | |
201 | Rayon = this->Radius(); |
202 | aView->Proj(VX,VY,VZ); |
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203 | V3d::CircleInPlane(gsphere,X0,Y0,Z0,VX,VY,VZ,Rayon); |
204 | |
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205 | if (MyType != V3d_DIRECTIONAL) { |
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206 | |
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207 | //Display of the radius of the sphere (line + text) |
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208 | |
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209 | if (Pres == V3d_COMPLETE) { |
210 | this->Position(X,Y,Z); |
211 | Handle(Graphic3d_ArrayOfSegments) aPrims = new Graphic3d_ArrayOfSegments(2); |
212 | aPrims->AddVertex(X0,Y0,Z0); |
213 | aPrims->AddVertex(X,Y,Z); |
214 | gnopick->AddPrimitiveArray(aPrims); |
215 | V3d::ArrowOfRadius(gExtArrow,X-.1*(X-X0),Y-.1*(Y-Y0),Z-.1*(Z-Z0),X-X0,Y-Y0,Z-Z0,M_PI/15.,Rayon/20.); |
216 | V3d::ArrowOfRadius(gIntArrow,X0,Y0,Z0,X0-X,Y0-Y,Z0-Z,M_PI/15.,Rayon/20.); |
217 | TCollection_AsciiString ValOfRadius(Rayon); |
218 | PText.SetCoord( .5*(X0+X), .5*(Y0+Y), .5*(Z0+Z) ); |
219 | gradius->Text(ValOfRadius.ToCString(),PText,0.01); |
220 | } |
221 | } |
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222 | |
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223 | // Display of the meridian |
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224 | |
225 | Quantity_Color Col2(Quantity_NOC_GREEN); |
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226 | Handle(Graphic3d_AspectLine3d) Asp2 = new Graphic3d_AspectLine3d(Col2,Aspect_TOL_SOLID,1.); |
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227 | gnopick->SetPrimitivesAspect(Asp2); |
228 | |
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229 | // Definition of the axis of circle |
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230 | aView->Up(DXRef,DYRef,DZRef); |
231 | this->Position(X,Y,Z); |
232 | DXini = X-X0; DYini = Y-Y0; DZini = Z-Z0; |
233 | VX = DYRef*DZini - DZRef*DYini; |
234 | VY = DZRef*DXini - DXRef*DZini; |
235 | VZ = DXRef*DYini - DYRef*DXini; |
236 | |
237 | V3d::CircleInPlane(gnopick,X0,Y0,Z0,VX,VY,VZ,Rayon); |
238 | |
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239 | // Display of the parallel |
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240 | |
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241 | // Definition of the axis of circle |
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242 | aView->Proj(VX,VY,VZ); |
243 | aView->Up(X1,Y1,Z1); |
244 | DXRef = VY * Z1 - VZ * Y1; |
245 | DYRef = VZ * X1 - VX * Z1; |
246 | DZRef = VX * Y1 - VY * X1; |
247 | this->Position(X,Y,Z); |
248 | DXini = X-X0; DYini = Y-Y0; DZini = Z-Z0; |
249 | VX = DYRef*DZini - DZRef*DYini; |
250 | VY = DZRef*DXini - DXRef*DZini; |
251 | VZ = DXRef*DYini - DYRef*DXini; |
252 | |
253 | V3d::CircleInPlane(gnopick,X0,Y0,Z0,VX,VY,VZ,Rayon); |
254 | } |
255 | |
256 | MyGraphicStructure->Connect(MyGraphicStructure1,Graphic3d_TOC_DESCENDANT); |
257 | MyTypeOfRepresentation = Pres; |
258 | MyGraphicStructure->Display(); |
259 | TheViewer->SetUpdateMode(UpdSov); |
260 | } |
261 | |
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262 | |
263 | void V3d_PositionLight::Tracking( const Handle(V3d_View)& aView, |
264 | const V3d_TypeOfPickLight WhatPick, |
265 | const Standard_Integer Xpix, |
266 | const Standard_Integer Ypix) { |
267 | |
268 | // Quantity_Color Col ; |
269 | Standard_Real xPos, yPos, zPos; |
270 | Standard_Real XPp,YPp,PXT,PYT,X,Y,Z,Rayon,Ylim; |
271 | Standard_Real XMinTrack,XMaxTrack,YMinTrack,YMaxTrack; |
272 | Standard_Real XT,YT,ZT,X0,Y0,Z0,XP,YP,ZP,VX,VY,VZ,A,B,C,Delta; |
273 | Standard_Real DX,DY,PXP,PYP,Xproj,Yproj; |
274 | Standard_Real A1,A2,B1,B2,Rap,OldRprj,NewRprj; |
275 | Standard_Real Xi,Yi,Zi,DeltaX,DeltaY,DeltaZ,Lambda; |
276 | Standard_Integer IPX,IPY; |
277 | |
278 | aView->Convert(Xpix,Ypix,XPp,YPp); |
279 | X0 = MyTarget.X(); |
280 | Y0 = MyTarget.Y(); |
281 | Z0 = MyTarget.Z(); |
282 | aView->Project(X0,Y0,Z0,PXT,PYT); |
283 | aView->Convert(PXT,PYT,IPX,IPY); |
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284 | // Coord 3d in the plane of projection of the target. |
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285 | aView->Convert(IPX,IPY,XT,YT,ZT); |
286 | switch (WhatPick) { |
287 | case V3d_POSITIONLIGHT : |
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288 | // The Coordinates should remain inside of the sphere |
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289 | Rayon = Radius(); |
290 | XMinTrack = PXT - Rayon; |
291 | XMaxTrack = PXT + Rayon; |
292 | Ylim = Sqrt( Square(Rayon) - Square(XPp - PXT) ); |
293 | YMinTrack = PYT - Ylim; |
294 | YMaxTrack = PYT + Ylim; |
295 | if (XPp >= XMinTrack && XPp <= XMaxTrack) { |
296 | if (YPp >= YMinTrack && YPp <= YMaxTrack) { |
297 | aView->ProjReferenceAxe(Xpix,Ypix,XP,YP,ZP,VX,VY,VZ); |
298 | DeltaX = X0 - XP; |
299 | DeltaY = Y0 - YP; |
300 | DeltaZ = Z0 - ZP; |
301 | |
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302 | // The point of intersection of straight lines defined by : |
303 | // - Straight line passing by the point of projection and the eye |
304 | // if this is a perspective, parralel to the normal of the view |
305 | // if this is an axonometric view. |
306 | // position in the view is parallel to the normal of the view |
307 | // - The distance position of the target camera is equal to the radius. |
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308 | |
309 | A = VX*VX + VY*VY + VZ*VZ ; |
310 | B = -2. * (VX*DeltaX + VY*DeltaY + VZ*DeltaZ); |
311 | C = DeltaX*DeltaX + DeltaY*DeltaY + DeltaZ*DeltaZ |
312 | - Rayon*Rayon ; |
313 | Delta = B*B - 4.*A*C; |
314 | if ( Delta >= 0 ) { |
315 | Lambda = (-B + Sqrt(Delta))/(2.*A); |
316 | X = XP + Lambda*VX; |
317 | Y = YP + Lambda*VY; |
318 | Z = ZP + Lambda*VZ; |
319 | SetPosition(X,Y,Z); |
320 | |
321 | if (MyType == V3d_SPOT) |
322 | ((V3d_SpotLight*)this)->SetDirection(X0-X,Y0-Y,Z0-Z); |
323 | |
324 | Display(aView,MyTypeOfRepresentation); |
325 | (aView->Viewer())->UpdateLights(); |
326 | } |
327 | } |
328 | } |
329 | break; |
330 | |
331 | case V3d_SPACELIGHT : |
332 | aView->Convert(PXT,PYT,IPX,IPY); |
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333 | // In this case Xpix,Ypix correspond to a distance, relative |
334 | // to the translation that is planned to be performed on the sphere. |
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335 | aView->Convert(IPX+Xpix,IPY+Ypix,X,Y,Z); |
336 | X = X+X0-XT; |
337 | Y = Y+Y0-YT; |
338 | Z = Z+Z0-ZT; |
339 | SetTarget(X,Y,Z); |
340 | Display(aView,MyTypeOfRepresentation); |
341 | (aView->Viewer())->UpdateLights(); |
342 | break; |
343 | |
344 | case V3d_ExtRADIUSLIGHT : |
345 | if (MyType == V3d_DIRECTIONAL) |
346 | break; |
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347 | // it is attempted to preserve the target direction position of the |
348 | // source ==> the point is projected on the target source direction. |
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349 | this->Position(Xi,Yi,Zi); |
350 | aView->Project(Xi,Yi,Zi,PXP,PYP); |
351 | DX = PXP - PXT; |
352 | DY = PYP - PYT; |
353 | A1 = DY/DX ; B1 = PYT - A1*PXT; |
354 | A2 = -DX/DY; B2 = YPp - A2*XPp; |
355 | Xproj = (B2 - B1) / (A1 - A2); |
356 | Yproj = A1*Xproj + B1; |
357 | if ( (DX*(Xproj-PXT) > 0.) && (DY*(Yproj-PYT) > 0.) ) { |
358 | OldRprj = Sqrt ( Square (PXP-PXT) + Square (PYP-PYT) ); |
359 | NewRprj = Sqrt ( Square (Xproj-PXT) + Square (Yproj-PYT) ); |
360 | Rap = NewRprj/OldRprj; |
361 | Rayon = Radius(); |
362 | Rayon = Rayon * Rap; |
363 | SetRadius(Rayon); |
364 | Display(aView,MyTypeOfRepresentation); |
365 | (aView->Viewer())->UpdateLights(); |
366 | } |
367 | break; |
368 | |
369 | case V3d_IntRADIUSLIGHT : |
370 | if (MyType == V3d_DIRECTIONAL) |
371 | break; |
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372 | // it is attempted to preserve the target direction position of the |
373 | // source ==> the point is projected on the target source direction. |
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374 | Position(Xi,Yi,Zi); |
375 | aView->Project(Xi,Yi,Zi,PXP,PYP); |
376 | DX = PXP - PXT; |
377 | DY = PYP - PYT; |
378 | A1 = DY/DX ; B1 = PYT - A1*PXT; |
379 | A2 = -DX/DY; B2 = YPp - A2*XPp; |
380 | Xproj = (B2 - B1) / (A1 - A2); |
381 | Yproj = A1*Xproj + B1; |
382 | if ( (DX*(Xproj-PXP) < 0.) && (DY*(Yproj-PYP) < 0.) ) { |
383 | OldRprj = Sqrt ( Square (PXP-PXT) + Square (PYP-PYT) ); |
384 | NewRprj = Sqrt ( Square (Xproj-PXP) + Square (Yproj-PYP) ); |
385 | Rap = NewRprj/OldRprj; |
386 | Rayon = Radius(); |
387 | Rayon = Rayon * Rap; |
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388 | // the source should remain at a fixed position, |
389 | // only the target is modified. |
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390 | Position (xPos, yPos, zPos); |
391 | Graphic3d_Vector Dir(Graphic3d_Vertex(xPos,yPos,zPos), MyTarget); |
392 | Dir.Normalize(); |
393 | Dir.Coord(X,Y,Z); |
394 | X = Xi + Rayon*X; |
395 | Y = Yi + Rayon*Y; |
396 | Z = Zi + Rayon*Z; |
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397 | // the source should remain at a fixed position, |
398 | // only the target is modified. |
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399 | MyTarget.SetCoord(X,Y,Z); |
400 | Display(aView,MyTypeOfRepresentation); |
401 | (aView->Viewer())->UpdateLights(); |
402 | } |
403 | break; |
404 | |
405 | case V3d_RADIUSTEXTLIGHT : |
406 | break; |
407 | |
408 | case V3d_NOTHING : |
409 | break; |
410 | } |
411 | } |
412 | |
413 | Standard_Real V3d_PositionLight::Radius() const { |
414 | |
415 | Standard_Real Xp,Yp,Zp, Xc,Yc,Zc; |
416 | |
417 | Position (Xp,Yp,Zp); |
418 | MyTarget.Coord(Xc,Yc,Zc); |
419 | |
420 | return Sqrt (Square(Xc - Xp) + Square(Yc - Yp) + Square(Zc - Zp)); |
421 | } |
422 | |
423 | void V3d_PositionLight::Erase() { |
424 | |
425 | if (!MyGraphicStructure.IsNull()) MyGraphicStructure->Erase(); |
426 | if (!MyGraphicStructure1.IsNull()) MyGraphicStructure1->Erase(); |
427 | } |
428 | |