move camera to model front after mesh is unfolded, viewer to singleton

Author: ShenyaoKe

src/GeomProc/meshmanager.cpp

@@ -10,6 +10,7 @@
 #include "MeshFactory/MeshDFormer.h"
 #include "MeshIterator.h"
 #include "GeomProc/MeshConnector.h"
+#include "UI/MeshViewer.h"
 
 #include "Utils/utils.h"
 
@@ -628,6 +629,7 @@ bool MeshManager::unfoldMesh()
 		// unfolded successfully
 		outMesh->printInfo("unfolded mesh:");
 		operationStack->push(outMesh);
+		MeshViewer::getInstance()->unfoldView(outMesh);
 		return true;
 	}
 	else

src/UI/Camera.cpp

@@ -10,10 +10,6 @@ perspCamera::perspCamera(const QVector3D& eyePos, const QVector3D& targetPos,
 	CameraToScreen.perspective(verticalAngle, aspectRatio, nearPlane, farPlane);
 }
 
-QVector3D perspCamera::getTarget() const
-{
-	return target;
-}
 
 void perspCamera::zoom(Float x_val, Float y_val, Float z_val)
 {

src/UI/Camera.h

@@ -25,7 +25,8 @@ class perspCamera
 		Float verticalAngle = 54.3, Float aspectRatio = 1.67,
 		Float nearPlane = 0.01, Float farPlane = 100);
 
-	QVector3D getTarget() const;
+	QVector3D getTarget() const { return target; }
+	void setTarget(const QVector3D &vec) { target = vec; }
 
 	void zoom(Float x_val = 0, Float y_val = 0, Float z_val = 0);
 	void rotate(Float x_rot = 0, Float y_rot = 0, Float z_rot = 0);

src/UI/MeshViewer.cpp

@@ -2,8 +2,8 @@
 #include <QFileDialog>
 #include "GeomProc/meshunfolder.h"
 #include "UI/SelectByRefIdPanel.h"
-//MeshViewer* MeshViewer::instance = nullptr;
 
+MeshViewer* MeshViewer::instance = nullptr;
 
 MeshViewer::MeshViewer(QWidget *parent)
 	: QOpenGLWidget(parent)
@@ -132,6 +132,18 @@ void MeshViewer::initializeGL()
 	glGenBuffers(2, fRBO.tbo);
 }
 
+void MeshViewer::unfoldView(const HDS_Mesh* inMesh)
+{
+	QVector3D boundMid = inMesh->bound->getMidPoint();
+	view_cam.setTarget(boundMid);
+	boundMid.setZ(10);
+
+	view_cam.WorldToCamera.setToIdentity();
+	view_cam.WorldToCamera.lookAt(
+		boundMid, view_cam.getTarget(), QVector3D(0, 1, 0));
+	view_cam.CameraToWorld = view_cam.WorldToCamera.inverted();
+}
+
 void MeshViewer::allocateGL()
 {
 	// Clear Selection

src/UI/MeshViewer.h

@@ -105,11 +105,21 @@ class MeshViewer
 	: public QOpenGLWidget, oglFuncs
 {
 	Q_OBJECT
-public:
+private:
 	explicit MeshViewer(QWidget *parent = nullptr);
+	MeshViewer(const MeshViewer &) = delete;
+	MeshViewer& operator = (const MeshViewer &) = delete;
+
 	~MeshViewer();
 public:
-	//void getInstance();
+	static MeshViewer* getInstance()
+	{
+		if (!instance)
+		{
+			instance = new MeshViewer;
+		}
+		return instance;
+	}
 
 	void bindHalfEdgeMesh(HDS_Mesh *mesh);
 
@@ -157,6 +167,7 @@ class MeshViewer
 	void toggleLightingWireframe();
 	void toggleText();
 
+	void unfoldView(const HDS_Mesh* inMesh);
 private: // paint function
 	void allocateGL();
 
@@ -279,7 +290,7 @@ class MeshViewer
 	uint32_t dispComp;//Display Components Flag
 	uint32_t hlComp;// Highlight Components Flag
 private:
-	//static MeshViewer* instance;
+	static MeshViewer* instance;
 	//viewer status
 	perspCamera view_cam;