Source/System/Window/Camera/OSGProjectionCameraDecorator.cpp

   1 /*---------------------------------------------------------------------------*\
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  37 \*---------------------------------------------------------------------------*/
  38
  39 //---------------------------------------------------------------------------
  40 //  Includes
  41 //---------------------------------------------------------------------------
  42
  43 #include <cstdlib>
  44 #include <cstdio>
  45
  46 #include "OSGConfig.h"
  47
  48 #include "OSGMatrixUtility.h"
  49 #include "OSGQuaternion.h"
  50 #include "OSGNode.h"
  51
  52 #include "OSGProjectionCameraDecorator.h"
  53
  54 OSG_USING_NAMESPACE
  55
  56 // Documentation for this class is emited in the
  57 // OSGProjectionCameraDecoratorBase.cpp file.
  58 // To modify it, please change the .fcd file (OSGProjectionCameraDecorator.fcd) and
  59 // regenerate the base file.
  60
  61 /*----------------------- constructors & destructors ----------------------*/
  62
  63 ProjectionCameraDecorator::ProjectionCameraDecorator(void) :
  64     Inherited()
  65 {
  66 }
  67
  68 ProjectionCameraDecorator::ProjectionCameraDecorator(
  69     const ProjectionCameraDecorator &source) :
  70
  71     Inherited(source)
  72 {
  73 }
  74
  75 ProjectionCameraDecorator::~ProjectionCameraDecorator(void)
  76 {
  77 }
  78
  79 /*----------------------------- class specific ----------------------------*/
  80
  81 void ProjectionCameraDecorator::initMethod(InitPhase ePhase)
  82 {
  83     Inherited::initMethod(ePhase);
  84 }
  85
  86 void ProjectionCameraDecorator::changed(ConstFieldMaskArg whichField,
  87                                         UInt32            origin,
  88                                         BitVector         details)
  89 {
  90     Inherited::changed(whichField, origin, details);
  91
  92     if(whichField & SurfaceFieldMask)
  93         updateData();
  94 }
  95
  96 void ProjectionCameraDecorator::dump(      UInt32    ,
  97                                      const BitVector ) const
  98 {
  99     SLOG << "Dump ProjectionCameraDecorator NI" << std::endl;
 100 }
 101
 102 /*! Update dependent data, i.e. the internal Field values.
 103 */
 104 void ProjectionCameraDecorator::updateData(void)
 105 {
 106     if(getMFSurface()->size() != 4)
 107     {
 108         FWARNING(("ProjectionCameraDecorator: only defined for 4 point "
 109                   "surfaces!\n"));
 110         return;
 111     }
 112
 113     Pnt3f p0(getSurface(0));
 114     Vec3f d1,d2,n;
 115
 116     d1 = getSurface(1) - p0;
 117     d2 = getSurface(3) - p0;
 118
 119     n = d1.cross(d2);
 120
 121     if(n.isZero())
 122     {
 123         FWARNING(("ProjectionCameraDecorator: normal is zero, surface "
 124                   "ill-defined!\n"));
 125         return;
 126     }
 127
 128     this->setLeft  (Plane(d1,p0));
 129     this->setBottom(Plane(d2,p0));
 130     this->setNormal(Plane(n ,p0));
 131     this->setWidth (d1.length());
 132     this->setHeight(d2.length());
 133 }
 134
 135
 136 void ProjectionCameraDecorator::getViewing(Matrix &result,
 137                                            UInt32  OSG_CHECK_ARG(width ),
 138                                            UInt32  OSG_CHECK_ARG(height))
 139 {
 140     Node *pUser = getUser();
 141
 142     if(pUser == NULL)
 143     {
 144         FWARNING(("ProjectionCameraDecorator::getViewing: no user!\n"));
 145
 146         Camera *pCamera = getDecoratee();
 147
 148         if(pCamera == NULL)
 149         {
 150             result.setIdentity();
 151
 152             return;
 153         }
 154
 155         pCamera->getBeacon()->getToWorld(result);
 156
 157         result.invert();
 158     }
 159     else
 160     {
 161         pUser->getToWorld(result);
 162
 163         result.invert();
 164     }
 165 }
 166
 167 void ProjectionCameraDecorator::getProjection(Matrix &result,
 168                                               UInt32  OSG_CHECK_ARG(width ),
 169                                               UInt32  OSG_CHECK_ARG(height))
 170 {
 171     Camera *camera = getDecoratee();
 172     Node   *pUser  = getUser     ();
 173
 174     if(camera == NULL)
 175     {
 176         FWARNING(("ProjectionCameraDecorator::getProjection: no "
 177                   "decoratee!\n"));
 178
 179         result.setIdentity();
 180
 181         return;
 182     }
 183
 184
 185     Matrix cam,user;
 186
 187     camera->getBeacon()->getToWorld(cam);
 188
 189     if(pUser == NULL)
 190     {
 191         FWARNING(("ProjectionCameraDecorator::getProjection: no user!\n"));
 192
 193         user = cam;
 194     }
 195     else
 196     {
 197         pUser->getToWorld(user);
 198     }
 199
 200     cam.invert();
 201
 202     cam.mult(user);
 203
 204     Pnt3f viewer(cam[3]);
 205
 206     Real32 eyeFac;
 207
 208     if(getLeftEye())
 209     {
 210         eyeFac=-.5;
 211     }
 212     else
 213     {
 214         eyeFac=+.5;
 215     }
 216
 217     viewer += Vec3f(cam[0]) * eyeFac * getEyeSeparation();
 218
 219     Real32 dist = getNormal().distance(viewer),
 220            dl   = getLeft  ().distance(viewer),
 221            db   = getBottom().distance(viewer),
 222            f    = camera->getNear() / dist;
 223
 224     MatrixFrustum(result, -dl * f, (getWidth ()-dl) * f,
 225                           -db * f, (getHeight()-db) * f,
 226                           camera->getNear(), camera->getFar() );
 227 }
 228
 229
 230 void ProjectionCameraDecorator::getProjectionTranslation(
 231     Matrix &result,
 232     UInt32  OSG_CHECK_ARG(width ),
 233     UInt32  OSG_CHECK_ARG(height))
 234 {
 235     Camera *camera = getDecoratee();
 236     Node   *pUser  = getUser     ();
 237
 238     if(camera == NULL)
 239     {
 240         FFATAL(("ProjectionCameraDecorator::getProjectionTranslation: "
 241                 "no decoratee!\n"));
 242
 243         result.setIdentity();
 244
 245         return;
 246     }
 247
 248
 249     Matrix cam,user;
 250
 251     camera->getBeacon()->getToWorld(cam);
 252
 253     if(pUser == NULL)
 254     {
 255         FWARNING(("ProjectionCameraDecorator::getProjectionTranslation: "
 256                   "no user!\n"));
 257
 258         user = cam;
 259     }
 260     else
 261     {
 262         pUser->getToWorld(user);
 263     }
 264
 265     cam.invert();
 266     cam.mult(user);
 267
 268     Vec3f dir(getNormal().getNormal()),
 269           up (getBottom().getNormal()),
 270           right;
 271     Vec3f pos(cam[3]);
 272
 273     Real32 eyeFac;
 274
 275     if(getLeftEye())
 276     {
 277         eyeFac=-.5;
 278     }
 279     else
 280     {
 281         eyeFac=+.5;
 282     }
 283
 284     pos += Vec3f(cam[0]) * eyeFac * getEyeSeparation();
 285
 286     right = up.cross(dir);
 287     up = dir.cross(right);
 288
 289     result.setIdentity();
 290     result.setValue(right, up, dir, pos);
 291     result.invert();
 292
 293     result.mult(cam);
 294 #if 0
 295 static bool hack = true;
 296     Quaternion q( getNormal().getNormal(), Vec3f(0,0,1));
 297
 298     Vec3f v;
 299     Real32 a;
 300     q.getValueAsAxisDeg(v,a);
 301
 302     // HACKKK
 303     if(hack && a > 50)
 304     {
 305         q.getValue(result);
 306
 307         Real32 ang1 = 54.44;
 308         Real32 ang2 = 6.27;
 309
 310         if(v[1] < 0)    ang1 = -ang1;
 311
 312         Quaternion q1,q2;
 313         Matrix m1,m2;
 314
 315         q1.setValueAsAxisDeg(0,1,0,ang1);
 316         q2.setValueAsAxisDeg(1,0,0,ang2);
 317
 318         q1.getValue(m1);
 319         q2.getValue(m2);
 320
 321         result = m2;
 322         result.mult(m1);
 323     }
 324 #endif
 325 }
 326