// Doc in parent
void
SoVRMLCone::computeBBox(SoAction * COIN_UNUSED_ARG(action),
SbBox3f & box,
SbVec3f & center)
{
float r = this->bottomRadius.getValue();
float h = this->height.getValue();
// Allow negative values.
if (h < 0.0f) h = -h;
if (r < 0.0f) r = -r;
float half_height = h * 0.5f;
// The SIDES are present, so just find the middle point and enclose
// everything.
if (this->side.getValue()) {
center.setValue(0.0f, 0.0f, 0.0f);
box.setBounds(SbVec3f(-r, -half_height, -r), SbVec3f(r, half_height, r));
}
// ..no SIDES, but we've still got the bottom (NB: OIV misses this case).
else if (this->bottom.getValue()) {
center.setValue(0.0f, -half_height, 0.0f);
box.setBounds(SbVec3f(-r, -half_height, -r), SbVec3f(r, -half_height, r));
}
// ..no parts present. My confidence is shot -- I feel very small.
else {
center.setValue(0.0f, 0.0f, 0.0f);
box.setBounds(SbVec3f(0.0f, 0.0f, 0.0f), SbVec3f(0.0f, 0.0f, 0.0f));
}
}
// This is a helper function for debugging purposes: it sets up an
// SoCoordinate3 + SoIndexedLineSet pair of nodes exposing the
// geometry of the SbBox3f input argument.
static void
make_scene_graph(const SbBox3f & box, SoCoordinate3 *& coord3, SoIndexedLineSet *& ils)
{
const SbVec3f & vmin = box.getMin();
const SbVec3f & vmax = box.getMax();
const SbVec3f corners[] = {
// back face
SbVec3f(vmin[0], vmin[1], vmin[2]),
SbVec3f(vmax[0], vmin[1], vmin[2]),
SbVec3f(vmax[0], vmax[1], vmin[2]),
SbVec3f(vmin[0], vmax[1], vmin[2]),
// front face
SbVec3f(vmin[0], vmin[1], vmax[2]),
SbVec3f(vmax[0], vmin[1], vmax[2]),
SbVec3f(vmax[0], vmax[1], vmax[2]),
SbVec3f(vmin[0], vmax[1], vmax[2])
};
const int32_t indices[] = {
0, 1, 2, 3, 0, -1, // back face
4, 5, 6, 7, 4, -1, // front face
0, 4, -1, 1, 5, -1, 2, 6, -1, 3, 7, -1 // "crossover" lines
};
coord3 = new SoCoordinate3;
coord3->point.setValues(0, sizeof(corners) / sizeof(corners[0]), corners);
ils = new SoIndexedLineSet;
ils->coordIndex.setValues(0, sizeof(indices) / sizeof(indices[0]), indices);
}
// doc in super
void
SoOrthoSlice::computeBBox(SoAction * action, SbBox3f & box, SbVec3f & center)
{
SoState * state = action->getState();
if (!PRIVATE(this)->confirmValidInContext(state)) { return; }
const CvrVoxelBlockElement * vbelem = CvrVoxelBlockElement::getInstance(state);
if (vbelem == NULL) return;
SbBox3f vdbox = vbelem->getUnitDimensionsBox();
SbVec3f bmin, bmax;
vdbox.getBounds(bmin, bmax);
const SbVec3s & dimensions = vbelem->getVoxelCubeDimensions();
const int axisidx = (int)axis.getValue();
const int slice = this->sliceNumber.getValue();
const float depth = (float)fabs(bmax[axisidx] - bmin[axisidx]);
bmin[axisidx] = bmax[axisidx] =
(bmin[axisidx] + (depth / dimensions[axisidx]) * slice);
vdbox.setBounds(bmin, bmax);
box.extendBy(vdbox);
center = vdbox.getCenter();
}
void
SoCylinder::computeBBox(SoAction *, SbBox3f &box, SbVec3f ¢er)
//
////////////////////////////////////////////////////////////////////////
{
int curParts = (parts.isIgnored() ? ALL : parts.getValue());
if (curParts == 0) // No parts at all!
box.setBounds(0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
else {
float r, h;
SbVec3f min, max;
getSize(r, h);
if (HAS_PART(curParts, SIDES | TOP))
max.setValue( r, h, r);
else
max.setValue( r, -h, r);
if (HAS_PART(curParts, SIDES | BOTTOM))
min.setValue(-r, -h, -r);
else
min.setValue(-r, h, -r);
box.setBounds(min, max);
}
center.setValue(0.0, 0.0, 0.0);
}
/**
* Sets the bounding box of the mesh to \a box and its center to \a center.
*/
void SoPolygon::computeBBox(SoAction *action, SbBox3f &box, SbVec3f ¢er)
{
SoState* state = action->getState();
const SoCoordinateElement * coords = SoCoordinateElement::getInstance(state);
if (!coords) return;
const SbVec3f * points = coords->getArrayPtr3();
if (!points) return;
float maxX=-FLT_MAX, minX=FLT_MAX,
maxY=-FLT_MAX, minY=FLT_MAX,
maxZ=-FLT_MAX, minZ=FLT_MAX;
int32_t len = coords->getNum();
int32_t beg = startIndex.getValue();
int32_t cnt = numVertices.getValue();
int32_t end = beg + cnt;
if (end <= len) {
for (int32_t i=beg; i<end; i++) {
maxX = std::max<float>(maxX,points[i][0]);
minX = std::min<float>(minX,points[i][0]);
maxY = std::max<float>(maxY,points[i][1]);
minY = std::min<float>(minY,points[i][1]);
maxZ = std::max<float>(maxZ,points[i][2]);
minZ = std::min<float>(minZ,points[i][2]);
}
box.setBounds(minX,minY,minZ,maxX,maxY,maxZ);
center.setValue(0.5f*(minX+maxX),0.5f*(minY+maxY),0.5f*(minZ+maxZ));
}
else {
box.setBounds(SbVec3f(0,0,0), SbVec3f(0,0,0));
center.setValue(0.0f,0.0f,0.0f);
}
}
SbBox3f ViewProviderDatum::getRelevantBoundBox () const {
std::vector<App::DocumentObject *> objs;
// Probe body first
PartDesign::Body* body = PartDesign::Body::findBodyOf ( this->getObject() );
if (body) {
objs = body->getFullModel ();
} else {
// Probe if we belongs to some group
App::DocumentObjectGroup* group = App::DocumentObjectGroup::getGroupOfObject ( this->getObject () );
if(group) {
objs = group->getObjects ();
} else {
// Fallback to whole document
objs = this->getObject ()->getDocument ()->getObjects ();
}
}
Gui::View3DInventorViewer* viewer = static_cast<Gui::View3DInventor*>(this->getActiveView())->getViewer();
SoGetBoundingBoxAction bboxAction(viewer->getSoRenderManager()->getViewportRegion());
SbBox3f bbox = getRelevantBoundBox (bboxAction, objs);
if ( bbox.getVolume () < Precision::Confusion() ) {
bbox.extendBy ( defaultBoundBox () );
}
return bbox;
}
// Expand SbXfBox3f in all directions with an epsilon value.
static SbXfBox3f
expand_SbXfBox3f(const SbXfBox3f & box, float epsilon)
{
assert(epsilon > 0.0f);
// FIXME: quality check the calculation for the epsilon-extended
// bbox. It needs to be correct _and_ not adding on too much
// fat. 20030331 mortene.
// This invokes the copy constructor (and not the SbXfBox3f(SbBox3f)
// constructor), so the transformation matrix is also copied.
SbXfBox3f extbox(box);
SbVec3f epsilonvec(epsilon, epsilon, epsilon);
// Move epsilon to object space.
box.getTransform().multDirMatrix(epsilonvec, epsilonvec);
const float localepsilon = epsilonvec.length(); // yes, it's a bit large...
epsilonvec = SbVec3f(localepsilon, localepsilon, localepsilon);
// Get superclass-pointer, so we can modify the box corners
// directly.
SbBox3f * extboxp = static_cast<SbBox3f *>(&extbox);
extboxp->getMin() -= epsilonvec;
extboxp->getMax() += epsilonvec;
return extbox;
}
void
SbSphere::circumscribe(const SbBox3f &box)
//
//////////////////////////////////////////////////////////////////////////////
{
center = 0.5 * (box.getMin() + box.getMax());
radius = (box.getMax() - center).length();
}
void
SoNurbsSurface::computeBBox(SoAction *action, SbBox3f &box, SbVec3f ¢er)
//
////////////////////////////////////////////////////////////////////////
{
const SoCoordinateElement *ce =
SoCoordinateElement::getInstance(action->getState());
int32_t nCoords, numSurfCoords;
int j, curCoord;
SbVec3f tmpCoord;
//
// Loop through coordinates, keeping max bounding box and sum of coords
// If the coordinates are rational, divide the first three values by
// the fourth value before extending the bounding box.
//
numSurfCoords = numUControlPoints.getValue() *
numVControlPoints.getValue();
nCoords = ce->getNum();
// Check for a degenerate surface
if ((numSurfCoords == 0) || (nCoords == 0))
return;
curCoord = 0;
center.setValue(0.0, 0.0, 0.0);
if (ce->is3D()) {
for (j = 0; j < numSurfCoords; j++) {
//
// Wrap around if necessary
//
if (curCoord >= nCoords)
curCoord = 0;
const SbVec3f &coord = ce->get3(curCoord);
box.extendBy(coord);
center += coord;
curCoord++;
}
}
else {
for (j = 0; j < numSurfCoords; j++) {
//
// Wrap around if necessary
//
if (curCoord >= nCoords)
curCoord = 0;
const SbVec4f &coord = ce->get4(curCoord);
coord.getReal (tmpCoord);
box.extendBy (tmpCoord);
center += tmpCoord;
curCoord++;
}
}
center /= (float) numSurfCoords;
}
void IvDragger::_GetBounds(SoSeparator *subtree, AABB& ab)
{
SoGetBoundingBoxAction bbox(_viewer.lock()->GetViewer()->getViewportRegion());
bbox.apply(subtree);
SbBox3f box = bbox.getBoundingBox();
RaveVector<float> vmin, vmax;
box.getBounds(vmin.x,vmin.y,vmin.z,vmax.x,vmax.y,vmax.z);
ab.pos = 0.5*(vmin+vmax);
ab.extents = 0.5*(vmax-vmin);
}
void ShapeBezierSurface::computeBBox(SoAction*, SbBox3f& box, SbVec3f& /*center*/ )
{
box.makeEmpty();
for (int i = 0; i < m_surfacesVector.size(); i++)
{
BBox pBox = m_surfacesVector[i]->GetComputeBBox();
SbVec3f pMin( pBox.pMin[0], pBox.pMin[1], pBox.pMin[2] );
box.extendBy( pMin );
SbVec3f pMax( pBox.pMax[0], pBox.pMax[1], pBox.pMax[2] );
box.extendBy( pMax );
}
}
void SoVtkAssembly::getBoundingBox(SoGetBoundingBoxAction *action)
{
SbBox3f bbox;
SbVec3f center;
if (mAssembly)
{
const double *bounds = mAssembly->GetBounds();
SbBox3f bbox(bounds[0], bounds[2], bounds[4], bounds[1], bounds[3], bounds[5]);
action->extendBy(bbox);
action->setCenter(bbox.getCenter(), FALSE);
}
}
void
SoXipMarkerSet::computeBBox( SoAction* action, SbBox3f& box, SbVec3f& center )
{
const SoCoordinateElement* ce = (const SoCoordinateElement *) SoCoordinateElement::getInstance( action->getState() );
if( ce )
{
for( int i = 0; i < ce->getNum(); ++ i )
box.extendBy( ce->get3(i) );
}
center = box.getCenter();
}
// set scale
void
InvAnnoManager::setSize(const SbBox3f &bb)
{
float dx = fabs(bb.getMin()[0] - bb.getMax()[0]);
float dy = fabs(bb.getMin()[1] - bb.getMax()[1]);
float dz = fabs(bb.getMin()[2] - bb.getMax()[2]);
float hsc = max(dx, dy);
hsc = max(hsc, dz);
hsc *= 0.2;
scale_ = hsc;
}
/**
* Sets the bounding box of the probe to \a box and its center to \a center.
*/
void SoRegPoint::computeBBox(SoAction *action, SbBox3f &box, SbVec3f ¢er)
{
root->doAction(action);
if (action->getTypeId().isDerivedFrom(SoGetBoundingBoxAction::getClassTypeId()))
static_cast<SoGetBoundingBoxAction*>(action)->resetCenter();
SbVec3f p1 = base.getValue();
SbVec3f p2 = p1 + normal.getValue() * length.getValue();
box.extendBy(p1);
box.extendBy(p2);
center = box.getCenter();
}
void rotateCamera(const SbRotation &rot)
{
SoCamera * camera = viewer->getCamera();
// get center of rotation
const float radius = camera->focalDistance.getValue();
SbVec3f forward;
camera->orientation.getValue().multVec(SbVec3f(0,0,-1), forward);
const SbVec3f center = camera->position.getValue() + radius * forward;
// apply new rotation to the camera
camera->orientation = rot * camera->orientation.getValue();
// reposition camera to look at pt of interest
camera->orientation.getValue().multVec(SbVec3f(0,0,-1), forward);
camera->position = center - radius * forward;
headlightRot->rotation = camera->orientation.getValue();
// Adjust clipping planes
SoGetBoundingBoxAction clipbox_action(getViewportRegion());
clipbox_action.apply(viewer->getSceneRoot());
SbBox3f bbox = clipbox_action.getBoundingBox();
if (bbox.isEmpty())
return;
SbSphere bSphere;
bSphere.circumscribe(bbox);
float denumerator = forward.length();
float numerator = (bSphere.getCenter() - camera->position.getValue()).dot(forward);
float distToCenter = (forward * (numerator / denumerator)).length();
float farplane = distToCenter + bSphere.getRadius();
// if scene is behind the camera, don't change the planes
if (farplane < 0) return;
float nearplane = distToCenter - bSphere.getRadius();
if (nearplane < (0.001 * farplane)) nearplane = 0.001 * farplane;
camera->nearDistance = nearplane;
camera->farDistance = farplane;
}
// compute object space ray and test for intersection
static SbBool
ray_intersect(SoRayPickAction * action, const SbBox3f & box)
{
if (box.isEmpty()) return FALSE;
action->setObjectSpace();
return action->intersect(box, TRUE);
}
// set scale
void
InvPlaneMover::setSize(const SbBox3f &bb)
{
float dx = fabs(bb.getMin()[0] - bb.getMax()[0]);
float dy = fabs(bb.getMin()[1] - bb.getMax()[1]);
float dz = fabs(bb.getMin()[2] - bb.getMax()[2]);
float hsc = qMax(dx, dy);
hsc = qMax(hsc, dz);
hsc *= 0.3f;
SbVec3f s(hsc, hsc, hsc);
scale_->scaleFactor.setValue(s);
}
void
SoXipMenuBase::GLRender( SoGLRenderAction* action )
{
if( on.getValue() == FALSE )
return ;
// Compute the 3D position of the menu, given the mouse 2D position
saveViewInformation( action );
mMenuOffset->translation.setValue( mPlaneProj->project( position.getValue() ) );
SoGetBoundingBoxAction bba( action->getViewportRegion() );
bba.apply( mMenuSeparator );
SbBox3f bbox = bba.getBoundingBox();
bbox.transform( mModelMatrix );
float viewportAR = mViewport.getViewportAspectRatio();
SbVec3f screenOffset(0, 0, 0);
if( viewportAR < 1. )
{
screenOffset[0] = bbox.getMax()[0] - 1.;
screenOffset[1] = bbox.getMax()[1] - 1. / viewportAR;
}
else
{
screenOffset[0] = bbox.getMax()[0] - viewportAR;
screenOffset[1] = bbox.getMax()[1] - 1;
}
if( screenOffset[0] < 0 )
screenOffset[0] = 0;
if( screenOffset[1] < 0 )
screenOffset[1] = 0;
SbVec3f worldOffset;
mModelMatrix.inverse().multVecMatrix( screenOffset, worldOffset );
mMenuOffset->translation.setValue( mMenuOffset->translation.getValue() - worldOffset );
glPushAttrib( GL_ENABLE_BIT );
glDisable( GL_DEPTH_TEST );
SoXipKit::GLRender( action );
glPopAttrib();
}
void SoWidgetShape::computeBBox(SoAction *action, SbBox3f &box, SbVec3f ¢er)
{
// ignore if node is empty
if (this->image.isNull()) return;
SbVec3f v0, v1, v2, v3;
// this will cause a cache dependency on the view volume,
// model matrix and viewport.
this->getQuad(action->getState(), v0, v1, v2, v3);
box.makeEmpty();
box.extendBy(v0);
box.extendBy(v1);
box.extendBy(v2);
box.extendBy(v3);
center = box.getCenter();
}
// Render 3D box.
//
// FIXME: should make bbox debug rendering part of SoSeparator /
// SoGroup. 20030305 mortene.
void
SoOrthoSliceP::renderBox(SoGLRenderAction * action, SbBox3f box)
{
SbVec3f bmin, bmax;
box.getBounds(bmin, bmax);
glPushAttrib(GL_ALL_ATTRIB_BITS);
glDisable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glColor4ub(0xff, 0xff, 0xff, 0xff);
glLineStipple(1, 0xffff);
glLineWidth(2);
glBegin(GL_LINES);
glVertex3f(bmin[0], bmin[1], bmin[2]);
glVertex3f(bmin[0], bmin[1], bmax[2]);
glVertex3f(bmax[0], bmin[1], bmin[2]);
glVertex3f(bmax[0], bmin[1], bmax[2]);
glVertex3f(bmax[0], bmax[1], bmin[2]);
glVertex3f(bmax[0], bmax[1], bmax[2]);
glVertex3f(bmin[0], bmax[1], bmin[2]);
glVertex3f(bmin[0], bmax[1], bmax[2]);
glVertex3f(bmin[0], bmin[1], bmin[2]);
glVertex3f(bmax[0], bmin[1], bmin[2]);
glVertex3f(bmin[0], bmin[1], bmax[2]);
glVertex3f(bmax[0], bmin[1], bmax[2]);
glVertex3f(bmin[0], bmax[1], bmax[2]);
glVertex3f(bmax[0], bmax[1], bmax[2]);
glVertex3f(bmin[0], bmax[1], bmin[2]);
glVertex3f(bmax[0], bmax[1], bmin[2]);
glVertex3f(bmin[0], bmin[1], bmin[2]);
glVertex3f(bmin[0], bmax[1], bmin[2]);
glVertex3f(bmin[0], bmin[1], bmax[2]);
glVertex3f(bmin[0], bmax[1], bmax[2]);
glVertex3f(bmax[0], bmin[1], bmax[2]);
glVertex3f(bmax[0], bmax[1], bmax[2]);
glVertex3f(bmax[0], bmin[1], bmin[2]);
glVertex3f(bmax[0], bmax[1], bmin[2]);
glEnd();
glPopAttrib();
}
SbBool
SoXipPolygon::isConsistent() const
{
// check if the contour size is greater than the minimum size.
const SbVec3f* pointPtr = point.getValues(0);
SbBox3f bbox;
for( int i = 0; i < point.getNum(); ++ i )
bbox.extendBy( pointPtr[i] );
SbVec3f bbSize;
bbox.getSize(bbSize[0], bbSize[1], bbSize[2]);
float screenScale = mViewVolume.getHeight() / mViewport.getViewportSizePixels()[1];
float bbLengthPix = bbSize.length() / screenScale;
return ( bbLengthPix >= (2 * CLOSING_MIN_PIXEL_DISTANCE) );
}
// Doc in superclass.
void
SoOrthographicCamera::viewBoundingBox(const SbBox3f & box,
float aspect, float slack)
{
#if COIN_DEBUG
if (box.isEmpty()) {
SoDebugError::postWarning("SoOrthographicCamera::viewBoundingBox",
"bounding box empty");
return;
}
#endif // COIN_DEBUG
// Get the radius of the bounding sphere.
SbSphere bs;
bs.circumscribe(box);
float radius = bs.getRadius();
// We want to move the camera in such a way that it is pointing
// straight at the center of the scene bounding box -- but without
// modifiying the rotation value (so we can't use SoCamera::pointAt()),
// and positioned at the edge of the bounding sphere.
SbVec3f cameradirection;
this->orientation.getValue().multVec(SbVec3f(0, 0, -1), cameradirection);
this->position.setValue(box.getCenter() + cameradirection * -radius);
// Set up the clipping planes tangent to the bounding sphere of the scene.
this->nearDistance = radius * ( -slack + 1);
this->farDistance = radius * ( slack + 1);
// The focal distance is simply the distance from the camera to the
// scene midpoint. This field is not used in rendering, its just
// provided to make it easier for the user to do calculations based
// on the distance between the camera and the scene.
this->focalDistance = radius;
// Make sure that everything will still be inside the viewing volume
// even if the aspect ratio "favorizes" width over height, and take the
// slack factor into account.
if (aspect < 1.0f)
this->height = 2 * radius / aspect;
else
this->height = 2 * radius;
}
void ShapeParabolicRectangle::computeBBox( SoAction*, SbBox3f& box, SbVec3f& /*center*/ )
{
BBox bBox = GetBBox();
// These points define the min and max extents of the box.
SbVec3f min, max;
min.setValue( bBox.pMin.x, bBox.pMin.y, bBox.pMin.z );
max.setValue( bBox.pMax.x, bBox.pMax.y, bBox.pMax.z );;
// Set the box to bound the two extreme points.
box.setBounds(min, max);
}
// doc from parent
void
SmTextureText2::computeBBox(SoAction * action, SbBox3f & box, SbVec3f & center)
{
SoState * state = action->getState();
// never cull this node. We do quick culling in the render method
SoCacheElement::invalidate(state);
// this boundingbox will _not_ be 100% correct. We just supply an
// estimate to avoid using lots of processing for calculating the
// boundingbox. FIXME: make it configurable if the bbox should be
// accurate or not
const SbVec3f * positions;
const int numpositions = this->getPositions(state, positions);
const SbVec3f & offset = this->offset.getValue();
for (int i = 0; i < numpositions; i++) {
box.extendBy(positions[i] + offset);
}
center = box.getCenter();
}
void Command::adjustCameraPosition()
{
Gui::Document* doc = Gui::Application::Instance->activeDocument();
if (doc) {
Gui::View3DInventor* view = static_cast<Gui::View3DInventor*>(doc->getActiveView());
Gui::View3DInventorViewer* viewer = view->getViewer();
SoCamera* camera = viewer->getSoRenderManager()->getCamera();
if (!camera || !camera->isOfType(SoOrthographicCamera::getClassTypeId()))
return;
// get scene bounding box
SoGetBoundingBoxAction action(viewer->getSoRenderManager()->getViewportRegion());
action.apply(viewer->getSceneGraph());
SbBox3f box = action.getBoundingBox();
if (box.isEmpty()) return;
// get cirumscribing sphere and check if camera is inside
SbVec3f cam_pos = camera->position.getValue();
SbVec3f box_cnt = box.getCenter();
SbSphere bs;
bs.circumscribe(box);
float radius = bs.getRadius();
float distance_to_midpoint = (box_cnt-cam_pos).length();
if (radius >= distance_to_midpoint) {
// Move the camera to the edge of the bounding sphere, while still
// pointing at the scene.
SbVec3f direction = cam_pos - box_cnt;
(void) direction.normalize(); // we know this is not a null vector
camera->position.setValue(box_cnt + direction * radius);
// New distance to mid point
distance_to_midpoint =
(camera->position.getValue() - box.getCenter()).length();
camera->nearDistance = distance_to_midpoint - radius;
camera->farDistance = distance_to_midpoint + radius;
camera->focalDistance = distance_to_midpoint;
}
}
}
const SbOctTree * getOctTree(void) {
if (this->octtree == NULL) {
const SbOctTreeFuncs funcs = {
NULL /* ptinsidefunc */,
PrimitiveData::insideboxfunc,
NULL /* insidespherefunc */,
NULL /* insideplanesfunc */
};
SbBox3f b = this->getBoundingBox();
// Add a 1% slack to the bounding box, to avoid problems in
// SbOctTree due to floating point inaccuracies (see assert() in
// SbOctTree::addItem()).
//
// This may be just a temporary hack -- see the FIXME at the
// same place as mentioned above.
SbMatrix m;
m.setTransform(SbVec3f(0, 0, 0), // translation
SbRotation::identity(), // rotation
SbVec3f(1.01f, 1.01f, 1.01f), // scalefactor
SbRotation::identity(), // scaleorientation
SbVec3f(b.getCenter())); // center
b.transform(m);
this->octtree = new SbOctTree(b, funcs);
if (ida_debug()) {
SoDebugError::postInfo("PrimitiveData::getOctTree",
"made new octtree for PrimitiveData %p", this);
}
for (unsigned int k = 0; k < this->numTriangles(); k++) {
SbTri3f * t = this->getTriangle(k);
this->octtree->addItem(t);
}
}
return this->octtree;
}
SoCallbackAction::Response
SoIntersectionDetectionAction::PImpl::shape(SoCallbackAction * action, SoShape * shape)
{
SbBox3f bbox;
SbVec3f center;
const SoBoundingBoxCache * bboxcache = shape->getBoundingBoxCache();
if (bboxcache && bboxcache->isValid(action->getState())) {
bbox = bboxcache->getProjectedBox();
if (bboxcache->isCenterSet()) center = bboxcache->getCenter();
else center = bbox.getCenter();
}
else {
shape->computeBBox(action, bbox, center);
}
ShapeData * data = new ShapeData;
data->path = new SoPath(*(action->getCurPath()));
data->path->ref();
data->xfbbox = bbox;
data->xfbbox.setTransform(action->getModelMatrix());
this->shapedata.append(data);
return SoCallbackAction::CONTINUE;
}
// Doc in parent
void
SoVRMLCylinder::computeBBox(SoAction * COIN_UNUSED_ARG(action),
SbBox3f & box,
SbVec3f & center)
{
float r = this->radius.getValue();
float h = this->height.getValue();
// Allow negative values.
if (r < 0.0f) r = -r;
if (h < 0.0f) h = -h;
// Either the SIDES are present, or we've at least got both the TOP
// and BOTTOM caps -- so just find the middle point and enclose
// everything.
if (this->side.getValue() ||
(this->bottom.getValue() &&
this->top.getValue())) {
center.setValue(0.0f, 0.0f, 0.0f);
box.setBounds(SbVec3f(-r, -h/2.0f, -r), SbVec3f(r, h/2.0f, r));
}
// ..not a "full" cylinder, but we've got the BOTTOM cap.
else if (this->bottom.getValue()) {
center.setValue(0.0f, -h/2.0f, 0.0f);
box.setBounds(SbVec3f(-r, -h/2.0f, -r), SbVec3f(r, -h/2.0f, r));
}
// ..not a "full" cylinder, but we've got the TOP cap.
else if (this->top.getValue()) {
center.setValue(0.0f, h/2.0f, 0.0f);
box.setBounds(SbVec3f(-r, h/2.0f, -r), SbVec3f(r, h/2.0f, r));
}
// ..no parts present. My confidence is shot -- I feel very small.
else {
center.setValue(0.0f, 0.0f, 0.0f);
box.setBounds(SbVec3f(0.0f, 0.0f, 0.0f), SbVec3f(0.0f, 0.0f, 0.0f));
}
}
/// Override original method since it seems to adjust the clipping planes in a weird manner.
/// Maybe using a screen-space projection or whatever.
virtual void adjustCameraClippingPlanes()
{
SoCamera * camera = getCamera();
if (!camera)
return;
SoGetBoundingBoxAction clipbox_action(getViewportRegion());
clipbox_action.apply(getSceneRoot());
SbBox3f bbox = clipbox_action.getBoundingBox();
if (bbox.isEmpty())
return;
SbSphere bSphere;
bSphere.circumscribe(bbox);
SbVec3f forward;
camera->orientation.getValue().multVec(SbVec3f(0,0,-1), forward);
float denumerator = forward.length();
float numerator = (bSphere.getCenter() - camera->position.getValue()).dot(forward);
float distToCenter = (forward * (numerator / denumerator)).length();
float farplane = distToCenter + bSphere.getRadius();
// if scene is behind the camera, don't change the planes
if (farplane < 0) return;
float nearplane = distToCenter - bSphere.getRadius();
if (nearplane < (0.001 * farplane)) nearplane = 0.001 * farplane;
camera->nearDistance = nearplane;
camera->farDistance = farplane;
}