limit pitch to [-90,90]

QtMeshViewer/Source/OglViewerWidget.cpp

@@ -72,17 +72,19 @@ void OglViewerWidget::mouseMoveEvent(QMouseEvent *e)
 		}
 		else if (m_rotDirections.x && m_rotDirections.y && !m_rotDirections.z)
 		{
-			//float pitch, yaw, roll;
-			//m_rotation.getEulerAngles(&pitch, &yaw, &roll);
-			//pitch += diff.y() * 0.5;
-			//yaw += diff.x() * 0.5;
 
-			//std::cout << pitch << " - " << yaw << std::endl;
+			float pitch, yaw, roll;
+			m_rotation.getEulerAngles(&pitch, &yaw, &roll);
 
-			//m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
+			pitch += diff.y() * 0.5;
+			yaw += diff.x() * 0.5;
 
-			m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(0.0, 1.0, 0.0).normalized(), diff.x() * 0.5) + m_rotation;
+			if (pitch > 89)
-			m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(1.0, 0.0, 0.0).normalized(), diff.y() * 0.5) + m_rotation;
+				pitch = 89;
+			else if (pitch < -89)
+				pitch = -89;
+
+			m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
 
 		}
 		else if (m_rotDirections.x && !m_rotDirections.y && !m_rotDirections.z)
@@ -97,6 +99,29 @@ void OglViewerWidget::mouseMoveEvent(QMouseEvent *e)
 		{
 			m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(0.0, 0.0, 1.0).normalized(), diff.x() * 0.5) * m_rotation;
 		}
+		else if (m_rotDirections.x && !m_rotDirections.y && m_rotDirections.z)
+		{
+			float pitch, yaw, roll;
+			m_rotation.getEulerAngles(&pitch, &yaw, &roll);
+			roll -= diff.y() * 0.5;
+			yaw += diff.x() * 0.5;
+
+			m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
+		}
+		else if (!m_rotDirections.x && m_rotDirections.y && m_rotDirections.z)
+		{
+			float pitch, yaw, roll;
+			m_rotation.getEulerAngles(&pitch, &yaw, &roll);
+			pitch += diff.y() * 0.5;
+			roll += diff.x() * 0.5;
+
+			if (pitch > 89)
+				pitch = 89;
+			else if (pitch < -89)
+				pitch = -89;
+
+			m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
+		}
 
 		
 		// request an update