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Gui: [skip ci] implement new RotationCenterMode called BoundingBoxCenter

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This commit is contained in:
wmayer
2020-11-27 15:12:10 +01:00
parent 056030b1d2
commit c582e8a085
2 changed files with 27 additions and 1 deletions
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25
src/Gui/NavigationStyle.cpp
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@@ -1052,6 +1052,31 @@ void NavigationStyle::saveCursorPosition(const SoEvent * const ev)
setRotationCenter(current_planept);
break;
}
case BoundingBoxCenter:
{
const SbViewportRegion & vp = viewer->getSoRenderManager()->getViewportRegion();
float ratio = vp.getViewportAspectRatio();
SoCamera* cam = viewer->getSoRenderManager()->getCamera();
if (!cam) break; // no camera
SoGetBoundingBoxAction action(viewer->getSoRenderManager()->getViewportRegion());
action.apply(viewer->getSceneGraph());
SbBox3f boundingBox = action.getBoundingBox();
SbVec3f boundingBoxCenter = boundingBox.getCenter();
setRotationCenter(boundingBoxCenter);
// To drag around the center point of the bbox we have to determine
// its projection on the screen becaue this information is used in
// NavigationStyle::spin() for the panning
SbViewVolume vv = cam->getViewVolume(ratio);
vv.projectToScreen(boundingBoxCenter, boundingBoxCenter);
SbVec2s size = vp.getViewportSizePixels();
short tox = static_cast<short>(boundingBoxCenter[0] * size[0]);
short toy = static_cast<short>(boundingBoxCenter[1] * size[1]);
this->localPos.setValue(tox, toy);
break;
}
default:
break;
}

3
src/Gui/NavigationStyle.h
View File

@@ -101,7 +101,8 @@ public:
enum RotationCenterMode {
ScenePointAtCursor, /**< Find the point in the scene at the cursor position. If there is no point then the focal plane is used */
FocalPointAtCursor /**< Find the point on the focal plane at the cursor position. */
FocalPointAtCursor, /**< Find the point on the focal plane at the cursor position. */
BoundingBoxCenter /**< Find the center point of the bounding box of the scene. */
};
public: