Initial commit of Command & Conquer Generals and Command & Conquer Generals Zero Hour source code.
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GeneralsMD/Code/GameEngine/Include/Common/Geometry.h
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GeneralsMD/Code/GameEngine/Include/Common/Geometry.h
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/*
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** Command & Conquer Generals Zero Hour(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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////////////////////////////////////////////////////////////////////////////////
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// //
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// (c) 2001-2003 Electronic Arts Inc. //
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// //
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////////////////////////////////////////////////////////////////////////////////
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// FILE: Geometry.h ///////////////////////////////////////////////////////////////////////////////
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// Author: Colin Day, November 2001
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// Desc: Geometry descriptions
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///////////////////////////////////////////////////////////////////////////////////////////////////
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#pragma once
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#ifndef __GEOMETRY_H_
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#define __GEOMETRY_H_
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#include "Lib/BaseType.h"
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#include "Common/AsciiString.h"
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#include "Common/Snapshot.h"
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class INI;
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//-------------------------------------------------------------------------------------------------
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/** Geometry type descriptions, keep this in the same order as GeometryNames[] below
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*
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* NOTE: Do *NOT* change the order of these defines unless you update the
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* partition manager ... in particular theCollideTestProcs depend on the
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* order of this geometry and the fact that the values start at 1
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*/
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//-------------------------------------------------------------------------------------------------
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enum GeometryType
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{
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GEOMETRY_SPHERE = 0, ///< partition/collision testing as sphere. (majorRadius = radius)
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GEOMETRY_CYLINDER, ///< partition/collision testing as cylinder. (majorRadius = radius, height = height)
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GEOMETRY_BOX, ///< partition/collision testing as rectangular box (majorRadius = half len in forward dir; minorRadius = half len in side dir; height = height)
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GEOMETRY_NUM_TYPES, // keep this last
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GEOMETRY_FIRST = GEOMETRY_SPHERE
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};
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#ifdef DEFINE_GEOMETRY_NAMES
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static const char *GeometryNames[] =
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{
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"SPHERE",
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"CYLINDER",
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"BOX",
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NULL
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};
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#endif // end DEFINE_GEOMETRY_NAMES
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//-------------------------------------------------------------------------------------------------
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#if defined(_DEBUG) || defined(_INTERNAL)
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enum ExtentModType
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{
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EXTENTMOD_INVALID = 0,
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EXTENTMOD_TYPE = 1,
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EXTENTMOD_MAJOR = 2,
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EXTENTMOD_MINOR = 3,
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EXTENTMOD_HEIGHT = 4,
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};
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static const Real EXTENT_BIG_CHANGE = 10.0f;
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#endif
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//-------------------------------------------------------------------------------------------------
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/** Geometry information */
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//-------------------------------------------------------------------------------------------------
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class GeometryInfo : public Snapshot
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{
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private:
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GeometryType m_type;
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Bool m_isSmall; ///< if true, geometry is assumed to fit in a single partition cell
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Real m_height;
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Real m_majorRadius;
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Real m_minorRadius;
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Real m_boundingCircleRadius; ///< not in INI file -- size of bounding circle (2d)
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Real m_boundingSphereRadius; ///< not in INI -- size of bounding sphere (3d)
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void calcBoundingStuff();
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protected:
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// snapshot methods
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virtual void crc( Xfer *xfer );
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virtual void xfer( Xfer *xfer );
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virtual void loadPostProcess( void );
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public:
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static void parseGeometryType( INI* ini, void * /*instance*/, void *store, const void* /*userData*/ );
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static void parseGeometryIsSmall( INI* ini, void * /*instance*/, void *store, const void* /*userData*/ );
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static void parseGeometryHeight( INI* ini, void * /*instance*/, void *store, const void* /*userData*/ );
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static void parseGeometryMajorRadius( INI* ini, void * /*instance*/, void *store, const void* /*userData*/ );
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static void parseGeometryMinorRadius( INI* ini, void * /*instance*/, void *store, const void* /*userData*/ );
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GeometryInfo(GeometryType type, Bool isSmall, Real height, Real majorRadius, Real minorRadius)
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{
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// Added by Sadullah Nader
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// Initializations missing and needed
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m_boundingCircleRadius = 0.0f;
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m_boundingSphereRadius = 0.0f;
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//
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set(type, isSmall, height, majorRadius, minorRadius);
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}
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void set(GeometryType type, Bool isSmall, Real height, Real majorRadius, Real minorRadius);
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// bleah, icky but needed for legacy code
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inline void setMajorRadius(Real majorRadius)
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{
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m_majorRadius = majorRadius;
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calcBoundingStuff();
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}
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// bleah, icky but needed for legacy code
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inline void setMinorRadius(Real minorRadius)
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{
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m_minorRadius = minorRadius;
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calcBoundingStuff();
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}
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inline GeometryType getGeomType() const { return m_type; }
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inline Bool getIsSmall() const { return m_isSmall; }
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inline Real getMajorRadius() const { return m_majorRadius; } // x-axis
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inline Real getMinorRadius() const { return m_minorRadius; } // y-axis
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// this has been removed and should never need to be called...
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// you should generally call getMaxHeightAbovePosition() instead. (srj)
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//inline Real getGeomHeight() const { return m_height; } // z-axis
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inline Real getBoundingCircleRadius() const { return m_boundingCircleRadius; }
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inline Real getBoundingSphereRadius() const { return m_boundingSphereRadius; }
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Bool isIntersectedByLineSegment(const Coord3D& loc, const Coord3D& from, const Coord3D& to) const;
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Real getFootprintArea() const;
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// given an object with this geom, how far above the object's canonical position does its max z extend?
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Real getMaxHeightAbovePosition() const;
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// given an object with this geom, how far below the object's canonical position does its max z extend?
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Real getMaxHeightBelowPosition() const;
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// given an object with this geom, how far above/below the object's canonical position is its center?
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Real getZDeltaToCenterPosition() const;
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// given an object with this geom, located at 'pos', where is the "center" of the geometry?
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void getCenterPosition(const Coord3D& pos, Coord3D& center) const;
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// given an object with this geom, located at 'pos', and another obj with the given
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// pos & geom, calc the min and max pitches from this to that.
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void calcPitches(const Coord3D& thisPos, const GeometryInfo& that, const Coord3D& thatPos,
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Real& minPitch, Real& maxPitch) const;
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/// expand the 2d footprint
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void expandFootprint(Real radius);
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/// get the 2d bounding box
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void get2DBounds(const Coord3D& geomCenter, Real angle, Region2D& bounds ) const;
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/// note that the pt is generated using game logic random, not game client random!
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void makeRandomOffsetWithinFootprint(Coord3D& pt) const;
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void makeRandomOffsetOnPerimeter(Coord3D& pt) const; //Chooses a random point on the extent border.
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void clipPointToFootprint(const Coord3D& geomCenter, Coord3D& ptToClip) const;
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Bool isPointInFootprint(const Coord3D& geomCenter, const Coord3D& pt) const;
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// given an object with this geom, SET how far above the object's canonical position its max z should extend.
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void setMaxHeightAbovePosition(Real z);
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#if defined(_DEBUG) || defined(_INTERNAL)
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void tweakExtents(ExtentModType extentModType, Real extentModAmount);
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AsciiString getDescriptiveString() const;
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#endif
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};
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#endif
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