1 files changed, 201 insertions, 0 deletions
diff --git a/vgui2/matsys_controls/manipulator.cpp b/vgui2/matsys_controls/manipulator.cpp
new file mode 100644
index 0000000..b582b11
--- /dev/null
+++ b/vgui2/matsys_controls/manipulator.cpp
@@ -0,0 +1,201 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================
+
+#include "matsys_controls/manipulator.h"
+
+#include "materialsystem/imaterialsystem.h"
+
+#include "vgui/IVGui.h"
+#include "vgui/IInput.h"
+#include "vgui/ISystem.h"
+#include "vgui/MouseCode.h"
+
+#include "mathlib/vector.h"
+#include "mathlib/vmatrix.h"
+#include "mathlib/mathlib.h"
+
+#include <float.h>
+
+using namespace vgui;
+
+
+//-----------------------------------------------------------------------------
+// local helper functions
+//-----------------------------------------------------------------------------
+static float UpdateTime( float &flLastTime )
+{
+	float flTime = vgui::system()->GetFrameTime();
+	float dt = flTime - flLastTime;
+	flLastTime = flTime;
+	return dt;
+}
+
+
+//-----------------------------------------------------------------------------
+// Base class for manipulators which operate on transforms
+//-----------------------------------------------------------------------------
+CTransformManipulator::CTransformManipulator( matrix3x4_t *pTransform ) :
+	m_pTransform( pTransform )
+{
+}
+
+void CTransformManipulator::SetTransform( matrix3x4_t *pTransform )
+{
+	m_pTransform = pTransform;
+}
+
+matrix3x4_t *CTransformManipulator::GetTransform( void )
+{
+	return m_pTransform;
+}
+
+
+//-----------------------------------------------------------------------------
+// CPotteryWheelManip - nendo-style camera manipulator
+//-----------------------------------------------------------------------------
+CPotteryWheelManip::CPotteryWheelManip( matrix3x4_t *pTransform ) :
+	CTransformManipulator( pTransform ),
+	m_lastx( -1 ), m_lasty( -1 ),
+	m_zoom( 100.0f ), m_altitude( 0.0f ), m_azimuth( 0.0f ),
+	m_prevZoom( 100.0f ), m_prevAltitude( 0.0f ), m_prevAzimuth( 0.0f ),
+	m_flLastMouseTime( 0.0f ), m_flLastTickTime( 0.0f ),
+	m_flSpin( 0.0f ), m_bSpin( false )
+{
+}
+
+void CPotteryWheelManip::OnBeginManipulation( void )
+{
+	m_prevZoom = m_zoom;
+	m_prevAltitude = m_altitude;
+	m_prevAzimuth = m_azimuth;
+	m_flLastMouseTime = m_flLastTickTime = vgui::system()->GetFrameTime();
+	m_flSpin = 0.0f;
+	m_bSpin = false;
+}
+
+// Sets the zoom level
+void CPotteryWheelManip::SetZoom( float flZoom )
+{
+	m_prevZoom = m_zoom = flZoom;
+}
+
+
+void CPotteryWheelManip::OnAcceptManipulation( void )
+{
+	m_flSpin = 0.0f;
+	m_bSpin = false;
+}
+
+void CPotteryWheelManip::OnCancelManipulation( void )
+{
+	m_zoom = m_prevZoom;
+	m_altitude = m_prevAltitude;
+	m_azimuth = m_prevAzimuth;
+	m_flSpin = 0.0f;
+	m_bSpin = false;
+	UpdateTransform();
+}
+
+
+void CPotteryWheelManip::OnTick( void )
+{
+	float dt = UpdateTime( m_flLastTickTime );
+
+	if ( m_bSpin )
+	{
+		m_azimuth += dt * m_flSpin;
+		UpdateTransform();
+	}
+}
+
+void CPotteryWheelManip::OnCursorMoved( int x, int y )
+{
+	float dt = UpdateTime( m_flLastMouseTime );
+
+	if ( m_bSpin )
+	{
+		m_lastx = x;
+		m_lasty = y;
+		return;
+	}
+
+	if ( input()->IsMouseDown( MOUSE_MIDDLE ) )
+	{
+		int dy = y - m_lasty;
+		int dx = x - m_lastx;
+
+		if ( abs( dx ) < 2 * abs( dy ) )
+		{
+			UpdateZoom( 0.2f * dy );
+		}
+		else
+		{
+			m_flSpin = (dt != 0.0f) ? 0.002f * dx / dt : 0.0f;
+			m_azimuth  += 0.002f * dx;
+		}
+	}
+	else
+	{
+		m_azimuth  += 0.002f * ( x - m_lastx );
+		m_altitude -= 0.002f * ( y - m_lasty );
+		m_altitude = max( (float)-M_PI/2, min( (float)M_PI/2, m_altitude ) );
+	}
+	m_lastx = x;
+	m_lasty = y;
+
+	UpdateTransform();
+}
+
+void CPotteryWheelManip::OnMousePressed( vgui::MouseCode code, int x, int y )
+{
+	UpdateTime( m_flLastMouseTime );
+	m_lastx = x;
+	m_lasty = y;
+	m_bSpin = false;
+	m_flSpin = 0.0f;
+}
+
+void CPotteryWheelManip::OnMouseReleased( vgui::MouseCode code, int x, int y )
+{
+	UpdateTime( m_flLastMouseTime );
+
+	if ( code == MOUSE_MIDDLE )
+	{
+		m_bSpin = ( fabs( m_flSpin ) > 1.0f );
+	}
+
+	m_lastx = x;
+	m_lasty = y;
+}
+
+void CPotteryWheelManip::OnMouseWheeled( int delta )
+{
+	UpdateTime( m_flLastMouseTime );
+
+	UpdateZoom( -10.0f * delta );
+	UpdateTransform();
+}
+
+void CPotteryWheelManip::UpdateTransform()
+{
+	if ( !m_pTransform )
+		return;
+
+	float y = m_zoom * sin( m_altitude );
+	float xz = m_zoom * cos( m_altitude );
+	float x = xz * sin( m_azimuth );
+	float z = xz * cos( m_azimuth );
+
+	Vector position(x, y, z);
+	AngleMatrix( RadianEuler( -m_altitude, m_azimuth, 0 ), position, *m_pTransform );
+}
+
+
+void CPotteryWheelManip::UpdateZoom( float delta )
+{
+	m_zoom *= pow( 1.01f, delta );
+}