288 lines
12 KiB
C
288 lines
12 KiB
C
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// Copyright (C) 2007 Id Software, Inc.
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//
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#ifndef __COLLISIONMODELMANAGER_H__
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#define __COLLISIONMODELMANAGER_H__
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/*
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===============================================================================
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Trace model vs. polygonal model collision detection.
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Short translations are the least expensive. Retrieving contact points is
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about as cheap as a short translation. Position tests are more expensive
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and rotations are most expensive.
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There is no position test at the start of a translation or rotation. In other
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words if a translation with start != end or a rotation with angle != 0 starts
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in solid, this goes unnoticed and the collision result is undefined.
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A translation with start == end or a rotation with angle == 0 performs
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a position test and fills in the trace_t structure accordingly.
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===============================================================================
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*/
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class idMaterial;
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class sdDeclSurfaceType;
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// contact type
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enum contactType_t {
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CONTACT_NONE, // no contact
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CONTACT_EDGE, // trace model edge hits model edge
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CONTACT_MODELVERTEX, // model vertex hits trace model polygon
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CONTACT_TRMVERTEX // trace model vertex hits model polygon
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};
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// contact info
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struct contactInfo_t {
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contactType_t type; // contact type
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idVec3 point; // point of contact
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idVec3 normal; // contact plane normal
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float dist; // contact plane distance
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float separation; // contact feature separation at initial position
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int contents; // contents at other side of surface
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const idMaterial * material; // surface material
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const sdDeclSurfaceType *surfaceType; // surface type
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idVec3 surfaceColor; // surface color
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int modelFeature; // contact feature on model
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int trmFeature; // contact feature on trace model
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int entityNum; // entity the contact surface is a part of
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int id; // id of clip model the contact surface is part of
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int selfId;
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};
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// trace result
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struct trace_t {
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float fraction; // fraction of movement completed, 1.0 = didn't hit anything
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idVec3 endpos; // final position of trace model
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idMat3 endAxis; // final axis of trace model
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contactInfo_t c; // contact information, only valid if fraction < 1.0
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};
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#define WORLD_MODEL_NAME "worldMap" // name of world model
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#define CM_CLIP_EPSILON 0.5f // always stay this distance away from any model
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const float CM_BOX_EPSILON = 1.f; // should always be larger than clip epsilon
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const short CM_BOX_EPSILON_SHORT = ( short )CM_BOX_EPSILON;
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#define CM_MAX_TRACE_DIST 4096.0f // maximum distance a trace model may be traced, point traces are unlimited
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#define MAIN_THREAD_ID 1
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struct cm_contents_override_t {
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cm_contents_override_t() : contentsAdd( 0 ), contentsRemove( 0 ) {}
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int contentsAdd;
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int contentsRemove;
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};
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// the planes should have been transformed into world space
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class collisionWorldBrushSide_t {
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public:
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collisionWorldBrushSide_t() : material( 0 ) {}
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collisionWorldBrushSide_t( const idPlane& p, const idMaterial* m, const idWinding& w, cm_contents_override_t contentsOverride_ ) :
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plane( p ),
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material( m ),
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winding( w ),
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contentsOverride( contentsOverride_ ) {
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}
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idPlane plane;
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const idMaterial* material;
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idWinding winding;
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cm_contents_override_t contentsOverride;
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collisionWorldBrushSide_t& operator=( const collisionWorldBrushSide_t& rhs ) {
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if( this == &rhs ) {
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return *this;
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}
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plane = rhs.plane;
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material = rhs.material;
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winding = rhs.winding;
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contentsOverride = rhs.contentsOverride;
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return *this;
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}
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};
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// the surface patch should have been transformed into world space
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class collisionWorldPatch_t {
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public:
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collisionWorldPatch_t() : material( NULL ) {}
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collisionWorldPatch_t( const idSurface_Patch& patch, const idMaterial* mat, int w, int h, cm_contents_override_t contentsOverride_ ) :
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width( w ), height( h ), surface( patch ), material( mat ), contentsOverride( contentsOverride_ ) {}
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idSurface_Patch surface;
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const idMaterial* material;
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int width;
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int height;
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cm_contents_override_t contentsOverride;
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};
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struct collisionWorldMesh_t {
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collisionWorldMesh_t() {}
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collisionWorldMesh_t( const char* model, cm_contents_override_t contentsOverride_, const idVec3& origin_ = vec3_origin, const idMat3& axis_ = mat3_identity ) :
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modelName( model ),
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origin( origin_ ),
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axis( axis_ ),
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contentsOverride( contentsOverride_ ) {
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}
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idStr modelName;
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idVec3 origin;
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idMat3 axis;
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cm_contents_override_t contentsOverride;
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};
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class collisionWorldEntity_t {
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public:
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collisionWorldEntity_t() {}
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collisionWorldEntity_t( const idStr& n, const idStr& c, const idDict& d, const idVec3& t, const idMat3& r, const idBounds& b = bounds_zero ) :
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name( n ), classname( c ), epairs( d ), translation( t ), rotation( r ), bounds( b ) {}
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idDict epairs;
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idStr name;
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idStr classname;
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idVec3 translation;
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idMat3 rotation;
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idBounds bounds;
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idList< collisionWorldBrushSide_t > sides;
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idList< int > planeNums;
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idList< sdPair< int, int > > brushSideIndices; // [ first, second ), each pair indexes into the sides list, comprising a single brush
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idList< collisionWorldPatch_t > patches;
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idList< collisionWorldMesh_t > meshes;
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};
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struct cm_procNode_t {
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idPlane plane;
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int children[2]; // negative numbers are (-1 - areaNumber), 0 = solid
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};
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typedef void* (*cmPushTaskCallback)( void* /*handle*/, const char* /*desc*/, int /*low*/ , int /*high*/ );
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typedef void(*cmUpdateTaskCallback)( void* /*handle*/, void* /*taskHandle*/, int /*value*/ );
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typedef void(*cmPopTaskCallback)( void* /*handle*/, void* /*taskHandle*/, bool /*remove*/ );
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class collisionWorldFile_t {
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public:
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collisionWorldFile_t() :
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crc( 0 ),
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pushTask( NULL ),
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updateTask( NULL ),
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popTask( NULL ),
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taskHandle( NULL ) {}
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idList< cm_procNode_t > procNodes;
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idList< collisionWorldEntity_t > entities;
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idStr name;
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int crc;
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cmPushTaskCallback pushTask;
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cmUpdateTaskCallback updateTask;
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cmPopTaskCallback popTask;
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void* taskHandle;
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};
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// collision model
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class idCollisionModel {
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public:
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virtual ~idCollisionModel() { }
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// Returns the name of the model.
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virtual const char * GetName( void ) const = 0;
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// Gets the bounds of the model.
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virtual const idBounds& GetBounds( void ) const = 0;
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// Gets the bounds of the model, excluding/including surfaces of the appropriate surface type
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virtual void GetBounds( idBounds& bounds, int surfaceMask, bool inclusive ) const = 0;
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// Gets all contents flags of brushes and polygons of the model ored together.
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virtual int GetContents( void ) const = 0;
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// Gets a vertex of the model.
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virtual const idVec3& GetVertex( int vertexNum ) const = 0;
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// Gets an edge of the model.
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virtual void GetEdge( int edgeNum, idVec3& start, idVec3& end ) const = 0;
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// Gets a polygon of the model.
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virtual void GetPolygon( int polygonNum, idFixedWinding &winding ) const = 0;
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// Draws surfaces which don't/do have the surface mask
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virtual void Draw( int surfaceMask, bool inclusive ) const = 0;
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virtual int GetNumBrushPlanes( void ) const = 0;
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virtual const idPlane& GetBrushPlane( int planeNum ) const = 0;
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virtual const idMaterial* GetPolygonMaterial( int polygonNum ) const = 0;
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virtual const idPlane& GetPolygonPlane( int polygonNum ) const = 0;
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virtual int GetNumPolygons( void ) const = 0;
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virtual bool IsTraceModel( void ) const = 0;
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virtual bool IsConvex( void ) const = 0;
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virtual bool IsWorld( void ) const = 0;
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virtual void SetWorld( bool tf ) = 0;
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};
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class idGame;
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// collision model manager
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class idCollisionModelManager {
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public:
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virtual ~idCollisionModelManager( void ) {}
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virtual void Init( void ) = 0;
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virtual void Shutdown( void ) = 0;
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virtual void AllocThread( void ) = 0;
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virtual void FreeThread( void ) = 0;
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virtual int GetThreadId( void ) = 0;
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virtual int GetThreadCount( void ) = 0;
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// Loads collision models from a map file.
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virtual void LoadMap( const char* fileName, bool forceReload ) = 0;
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// Loads a collision model.
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virtual idCollisionModel* LoadModel( const char *mapName, const char *modelName ) = 0;
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// Free the given model.
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virtual void FreeModel( idCollisionModel *model ) = 0;
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// Purge all unused models.
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virtual void PurgeModels( void ) = 0;
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// Sets up a trace model for collision with other trace models.
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virtual idCollisionModel * ModelFromTrm( const char *mapName, const char *modelName, const idTraceModel &trm, bool includeBrushes ) = 0;
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// Creates a trace model from a collision model, returns true if succesfull.
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virtual bool TrmFromModel( const char *mapName, const char *modelName, idTraceModel &trm ) = 0;
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// Creates a trace model for each primitive of the collision model, returns the number of trace models.
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virtual int CompoundTrmFromModel( const char *mapName, const char *modelName, idTraceModel *trms, int maxTrms ) = 0;
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virtual void CreateCollisionFromWorld( const collisionWorldFile_t& world ) = 0;
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// Translates a trace model and reports the first collision if any.
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virtual void Translation( trace_t *results, const idVec3 &start, const idVec3 &end,
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const idTraceModel *trm, const idMat3 &trmAxis, int contentMask,
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idCollisionModel *model, const idVec3 &modelOrigin, const idMat3 &modelAxis ) = 0;
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// Rotates a trace model and reports the first collision if any.
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virtual void Rotation( trace_t *results, const idVec3 &start, const idRotation &rotation,
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const idTraceModel *trm, const idMat3 &trmAxis, int contentMask,
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idCollisionModel *model, const idVec3 &modelOrigin, const idMat3 &modelAxis ) = 0;
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// Returns the contents touched by the trace model or 0 if the trace model is in free space.
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virtual int Contents( const idVec3 &start,
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const idTraceModel *trm, const idMat3 &trmAxis, int contentMask,
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idCollisionModel *model, const idVec3 &modelOrigin, const idMat3 &modelAxis ) = 0;
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// Stores all contact points of the trace model with the model, returns the number of contacts.
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virtual int Contacts( contactInfo_t *contacts, const int maxContacts, const idVec3 &start, const idVec3 *dir, const float depth,
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const idTraceModel *trm, const idMat3 &trmAxis, int contentMask,
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idCollisionModel *model, const idVec3 &modelOrigin, const idMat3 &modelAxis ) = 0;
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// Tests collision detection.
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virtual void DebugOutput( const idVec3 &viewOrigin, const idMat3 &viewAxis ) = 0;
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// Draws a model.
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virtual void DrawModel( idCollisionModel *model, const idVec3 &modelOrigin, const idMat3 &modelAxis,
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const idVec3 &viewOrigin, const idMat3 &viewAxis, const float radius, int lifetime ) = 0;
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// Lists all loaded models.
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virtual void ListModels( void ) = 0;
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// Prints model information, use -1 for accumulated model info.
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virtual void ModelInfo( int num ) = 0;
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virtual void GetFullModelName( idStr& out, const char* mapName, const char* modelName ) const = 0;
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virtual void DumpCollisionModelStats( void ) = 0;
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};
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extern idCollisionModelManager *collisionModelManager;
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#endif /* !__COLLISIONMODELMANAGER_H__ */
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