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hammer/gridnav.h

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+//========= Copyright <20> 2009, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Defines the regular grid nav as required by DOTA. Builds, renders,
+//				and saves out the nav. Traversable edges and cells are determined by
+//				picking into the world.
+//
+//=============================================================================//
+
+#ifndef GRIDNAV_H
+#define GRIDNAV_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+class CRender3D;
+class CMapDoc;
+
+#include "mathlib/vector.h"
+#include "utlvector.h"
+
+class CGridNavCell
+{
+public:
+
+	inline CGridNavCell();
+
+	bool m_bTraversable;
+
+	int m_nGridPosX;
+	int m_nGridPosY;
+
+	float m_flHeight;
+};
+
+class CGridNav
+{
+public:
+
+	CGridNav();
+
+	inline static bool IsEnabled();
+
+	inline bool IsPreviewActive();
+	inline void TogglePreview();
+
+	static void Init( bool enabled, float flEdgeSize = 0.0f, float flOffsetX = 0.0f, float flOffsetY = 0.0f, float flTraceHeight = 0.0f );
+
+	void Render( CRender3D *pRender, const Vector &vViewPos, const Vector &vViewDir );
+
+	void Update( CMapDoc *pMapDoc, const Vector &vViewPos, const Vector &vViewDir );
+
+	void GenerateGridNavFile( const char *pFileFullPath );
+
+	inline int CoordToGridPosX( float flCoordX ) const;
+	inline int CoordToGridPosY( float flCoordY ) const;
+
+	inline float GridPosXToCoordCenter( int nGridPosX ) const;
+	inline float GridPosYToCoordCenter( int nGridPosY ) const;
+
+private:
+
+	static bool sm_bEnabled;
+	static float sm_flEdgeSize;
+	static float sm_flOffsetX;
+	static float sm_flOffsetY;
+	static float sm_flTraceHeight;
+
+	Vector m_vLatestCameraPos;
+	Vector m_vLatestCameraDir;
+	bool m_bNeedsCameraRecompute;
+	float m_flTimeCameraLastMoved;
+	int m_nTicksCameraStill;
+	
+	CUtlVector< CGridNavCell > m_CurrentCells;
+
+	bool m_bPreviewActive;
+};
+
+
+////////////////////
+
+bool CGridNav::IsEnabled()
+{
+	return sm_bEnabled;
+}
+
+
+bool CGridNav::IsPreviewActive()
+{
+	return m_bPreviewActive;
+}
+
+
+void CGridNav::TogglePreview()
+{
+	m_bPreviewActive = !m_bPreviewActive;
+}
+
+
+int CGridNav::CoordToGridPosX( float flCoordX ) const
+{
+	return (int)floor( ( ( flCoordX - sm_flOffsetX ) + ( sm_flEdgeSize * 0.5f ) ) / sm_flEdgeSize );
+}
+
+
+int CGridNav::CoordToGridPosY( float flCoordY ) const
+{
+	return (int)floor( ( ( flCoordY - sm_flOffsetY ) + ( sm_flEdgeSize * 0.5f ) ) / sm_flEdgeSize );
+}
+
+
+float CGridNav::GridPosXToCoordCenter( int nGridPosX ) const
+{
+	return ( ( (float)(nGridPosX) ) * sm_flEdgeSize ) + sm_flOffsetX;
+}
+
+
+float CGridNav::GridPosYToCoordCenter( int nGridPosY ) const
+{
+	return ( ( (float)(nGridPosY) ) * sm_flEdgeSize ) + sm_flOffsetY;
+}
+
+
+CGridNavCell::CGridNavCell()
+	: m_bTraversable( false )
+	, m_nGridPosX( 0 )
+	, m_nGridPosY( 0 )
+	, m_flHeight( 0.0f )
+{
+}
+
+#endif // GRIDNAV_H