added movement and zoom

QtMeshViewer/Source/OglViewerWidget.cpp

@@ -2,6 +2,9 @@
 
 #include <QMouseEvent>
 #include <math.h>
+#include <iostream>
+
+#define DEFAULT_Z_DISTANCE -5.0
 
 
 /////////////////////////////////////////////////////////////////////////
@@ -12,6 +15,7 @@ OglViewerWidget::OglViewerWidget(QWidget *parent) :
 	m_dataEngine(0)
 {
 	setFocus();
+	m_translation.setZ(DEFAULT_Z_DISTANCE);
 }
 
 OglViewerWidget::~OglViewerWidget()
@@ -63,13 +67,35 @@ void OglViewerWidget::mouseMoveEvent(QMouseEvent *e)
 		// request an update
 		update();
 	}
+	else if (m_mouse.right)
+	{
+		// get the difference between last press and now
+		QVector2D diff = QVector2D(e->localPos()) - m_mouse.position;
+
+		// update the new position
+		m_mouse.position = QVector2D(e->localPos());
+
+		// calculate the translation
+		m_translation += {(float)(diff.x() * 0.01), (float)(diff.y() * -0.01), 0.0};
+
+		// request an update
+		update();
+	}
+}
+
+void OglViewerWidget::wheelEvent(QWheelEvent *e)
+{
+	m_translation += {0.0, 0.0, (float)e->angleDelta().y() / 240};
+	update();
 }
 
 void OglViewerWidget::keyPressEvent(QKeyEvent *e)
 {
 	if (e->key() == Qt::Key_Space)
+	{
 		m_rotation = QQuaternion();
-
+		m_translation = { 0.0, 0.0, DEFAULT_Z_DISTANCE };
+	}
 	update();
 }
 
@@ -97,7 +123,7 @@ void OglViewerWidget::resizeGL(int w, int h)
 	qreal aspect = qreal(w) / qreal(h ? h : 1);
 
 	// Set near plane to 3.0, far plane to 7.0, field of view 45 degrees
-	const qreal zNear = 3.0, zFar = 7.0, fov = 45.0;
+	const qreal zNear = 0.1, zFar = 100.0, fov = 45.0;
 
 	// Reset projection
 	m_projection.setToIdentity();
@@ -113,7 +139,7 @@ void OglViewerWidget::paintGL()
 
 	// Calculate model view transformation
 	QMatrix4x4 view;
-	view.translate(0.0, 0.0, -5.0);
+	view.translate(m_translation);
 	view.rotate(m_rotation);
 
 	// Set modelview-projection matrix