Add ISceneNodeAnimatorCameraMaya::setTargetMinDistance and getTargetMinDistance which allow to keep a distance to the zoom target.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5106 dfc29bdd-3216-0410-991c-e03cc46cb475

changes.txt

@@ -1,6 +1,7 @@
 --------------------------
 Changes in 1.9 (not yet released)
 
+- Add ISceneNodeAnimatorCameraMaya::setTargetMinDistance and getTargetMinDistance.
 - Add override font to IGUITreeView
 - CGUIComboBox now updates selection-list when font changes while it's open (thx @ rubixcuber for bugreport)
 - CAnimatedMeshSceneNode::setMesh does now set the animation speed again to that of the mesh (had been changed in 1.7, but not for obvious reasons)

include/ISceneNodeAnimatorCameraMaya.h

@@ -49,6 +49,13 @@ namespace scene
 
 		//! Set the distance
 		virtual void setDistance(f32 distance) = 0;
+
+		//! Set the minimal distance to the camera target for zoom
+		virtual void setTargetMinDistance(f32 minDistance) = 0;
+
+		//! Returns the minimal distance to the camera target for zoom
+		virtual f32 getTargetMinDistance() const = 0;
+
 	};
 
 } // end namespace scene

source/Irrlicht/CSceneNodeAnimatorCameraMaya.cpp

@@ -17,6 +17,7 @@ namespace scene
 CSceneNodeAnimatorCameraMaya::CSceneNodeAnimatorCameraMaya(gui::ICursorControl* cursor,
 	f32 rotateSpeed, f32 zoomSpeed, f32 translateSpeed, f32 distance)
 	: CursorControl(cursor), OldCamera(0), MousePos(0.5f, 0.5f),
+	TargetMinDistance(0.f),
 	ZoomSpeed(zoomSpeed), RotateSpeed(rotateSpeed), TranslateSpeed(translateSpeed),
 	CurrentZoom(distance), RotX(0.0f), RotY(0.0f),
 	Zooming(false), Rotating(false), Moving(false), Translating(false)
@@ -138,11 +139,10 @@ void CSceneNodeAnimatorCameraMaya::animateNode(ISceneNode *node, u32 timeMs)
 		}
 		else
 		{
-			const f32 targetMinDistance = 0.1f;
 			nZoom += (ZoomStart.X - MousePos.X) * ZoomSpeed;
 
-			if (nZoom < targetMinDistance) // jox: fixed bug: bounce back when zooming to close
-				nZoom = targetMinDistance;
+			if (nZoom < TargetMinDistance+0.1f) // jox: fixed bug: bounce back when zooming too close
+				nZoom = TargetMinDistance+0.1f;
 		}
 	}
 	else if (Zooming)
@@ -151,7 +151,7 @@ void CSceneNodeAnimatorCameraMaya::animateNode(ISceneNode *node, u32 timeMs)
 		CurrentZoom = CurrentZoom + (ZoomStart.X - MousePos.X ) * ZoomSpeed;
 		nZoom = CurrentZoom;
 
-		if (nZoom < 0)
+		if (nZoom < TargetMinDistance)
 			nZoom = CurrentZoom = old;
 		Zooming = false;
 	}
@@ -309,6 +309,18 @@ f32 CSceneNodeAnimatorCameraMaya::getDistance() const
 	return CurrentZoom;
 }
 
+void CSceneNodeAnimatorCameraMaya::setTargetMinDistance(f32 minDistance)
+{
+	TargetMinDistance = minDistance;
+	if ( CurrentZoom < TargetMinDistance )
+		CurrentZoom = TargetMinDistance;
+}
+
+f32 CSceneNodeAnimatorCameraMaya::getTargetMinDistance() const
+{
+	return TargetMinDistance;
+}
+
 
 ISceneNodeAnimator* CSceneNodeAnimatorCameraMaya::createClone(ISceneNode* node, ISceneManager* newManager)
 {

source/Irrlicht/CSceneNodeAnimatorCameraMaya.h

@@ -64,6 +64,12 @@ namespace scene
 		//! Set the distance
 		virtual void setDistance(f32 distance) _IRR_OVERRIDE_;
 
+		//! Set the minimal distance to the camera target for zoom
+		virtual void setTargetMinDistance(f32 minDistance) _IRR_OVERRIDE_;
+
+		//! Returns the minimal distance to the camera target for zoom
+		virtual f32 getTargetMinDistance() const _IRR_OVERRIDE_;
+
 		//! This animator will receive events when attached to the active camera
 		virtual bool isEventReceiverEnabled() const _IRR_OVERRIDE_
 		{
@@ -98,6 +104,7 @@ namespace scene
 		core::position2df ZoomStart;
 		core::position2df TranslateStart;
 		core::position2df MousePos;
+		f32 TargetMinDistance;
 		f32 ZoomSpeed;
 		f32 RotateSpeed;
 		f32 TranslateSpeed;