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Gui: Find bounding sphere before drag or animation

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This commit is contained in:
Rexbas
2023-11-10 22:33:41 +01:00
parent 93468a5e0b
commit 0309be88d1
4 changed files with 30 additions and 20 deletions
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42
src/Gui/NavigationStyle.cpp
View File

@@ -479,6 +479,13 @@ void NavigationStyle::viewAll()
}
}
void NavigationStyle::findBoundingSphere() {
// Find a bounding sphere for the scene
SoGetBoundingBoxAction action(viewer->getSoRenderManager()->getViewportRegion());
action.apply(viewer->getSceneGraph());
boundingSphere.circumscribe(action.getBoundingBox());
}
/** Rotate the camera by the given amount, then reposition it so we're still pointing at the same
* focal point
*/
@@ -511,29 +518,23 @@ void NavigationStyle::reorientCamera(SoCamera* camera, const SbRotation& rotatio
camera->position = rotationCenter + newRotationCenterDistance;
// Fix issue with near clipping in orthogonal view
if (camera->getTypeId().isDerivedFrom(SoOrthographicCamera::getClassTypeId())) {
if (camera->getTypeId().isDerivedFrom(SoOrthographicCamera::getClassTypeId())) {
// Find a bounding sphere for the scene
SoGetBoundingBoxAction action(viewer->getSoRenderManager()->getViewportRegion());
action.apply(viewer->getSceneGraph());
SbSphere boundingSphere;
boundingSphere.circumscribe(action.getBoundingBox());
// The center of the bounding sphere in camera coordinate system
SbVec3f center;
camera->orientation.getValue().inverse().multVec(boundingSphere.getCenter() - camera->position.getValue(), center);
// The center of the bounding sphere in camera coordinate system
SbVec3f center;
camera->orientation.getValue().inverse().multVec(boundingSphere.getCenter() - camera->position.getValue(), center);
SbVec3f dir;
camera->orientation.getValue().multVec(SbVec3f(0, 0, -1), dir);
SbVec3f dir;
camera->orientation.getValue().multVec(SbVec3f(0, 0, -1), dir);
// Reposition the camera but keep the focal point the same
// nearDistance is 0 and farDistance is the diameter of the bounding sphere
float repositionDistance = -center.getValue()[2] - boundingSphere.getRadius();
camera->position = camera->position.getValue() + repositionDistance * dir;
camera->nearDistance = 0;
camera->farDistance = 2 * boundingSphere.getRadius();
camera->focalDistance = camera->focalDistance.getValue() - repositionDistance;
}
// Reposition the camera but keep the focal point the same
// nearDistance is 0 and farDistance is the diameter of the bounding sphere
float repositionDistance = -center.getValue()[2] - boundingSphere.getRadius();
camera->position = camera->position.getValue() + repositionDistance * dir;
camera->nearDistance = 0;
camera->farDistance = 2 * boundingSphere.getRadius();
camera->focalDistance = camera->focalDistance.getValue() - repositionDistance;
}
}
void NavigationStyle::panCamera(SoCamera * cam, float aspectratio, const SbPlane & panplane,
@@ -1299,6 +1300,7 @@ void NavigationStyle::setViewingMode(const ViewerMode newmode)
// Set up initial projection point for the projector object when
// first starting a drag operation.
animator->stop();
findBoundingSphere();
viewer->showRotationCenter(true);
this->spinprojector->project(this->lastmouseposition);
this->interactiveCountInc();