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498 lines
14 KiB
498 lines
14 KiB
//========= Copyright Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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// $NoKeywords: $ |
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// |
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//=============================================================================// |
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// nav.h |
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// Data structures and constants for the Navigation Mesh system |
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// Author: Michael S. Booth (mike@turtlerockstudios.com), January 2003 |
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#ifndef _NAV_H_ |
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#define _NAV_H_ |
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#include "modelentities.h" // for CFuncBrush |
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#include "doors.h" |
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/** |
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* Below are several constants used by the navigation system. |
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* @todo Move these into TheNavMesh singleton. |
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*/ |
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const float GenerationStepSize = 25.0f; // (30) was 20, but bots can't fit always fit |
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const float JumpHeight = 41.8f; // if delta Z is less than this, we can jump up on it |
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#if defined(CSTRIKE_DLL) |
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const float JumpCrouchHeight = 58.0f; // (48) if delta Z is less than or equal to this, we can jumpcrouch up on it |
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#else |
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const float JumpCrouchHeight = 64.0f; // (48) if delta Z is less than or equal to this, we can jumpcrouch up on it |
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#endif |
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// There are 3 different definitions of StepHeight throughout the code, waiting to produce bugs if the 18.0 is ever changed. |
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const float StepHeight = 18.0f; // if delta Z is greater than this, we have to jump to get up |
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// TERROR: Increased DeathDrop from 200, since zombies don't take falling damage |
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#if defined(CSTRIKE_DLL) |
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const float DeathDrop = 200.0f; // (300) distance at which we will die if we fall - should be about 600, and pay attention to fall damage during pathfind |
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#else |
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const float DeathDrop = 400.0f; // (300) distance at which we will die if we fall - should be about 600, and pay attention to fall damage during pathfind |
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#endif |
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#if defined(CSTRIKE_DLL) |
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const float ClimbUpHeight = JumpCrouchHeight; // CSBots assume all jump up links are reachable |
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#else |
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const float ClimbUpHeight = 200.0f; // height to check for climbing up |
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#endif |
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const float CliffHeight = 300.0f; // height which we consider a significant cliff which we would not want to fall off of |
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// TERROR: Converted these values to use the same numbers as the player bounding boxes etc |
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#define HalfHumanWidth 16 |
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#define HalfHumanHeight 35.5 |
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#define HumanHeight 71 |
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#define HumanEyeHeight 62 |
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#define HumanCrouchHeight 55 |
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#define HumanCrouchEyeHeight 37 |
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#define NAV_MAGIC_NUMBER 0xFEEDFACE // to help identify nav files |
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/** |
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* A place is a named group of navigation areas |
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*/ |
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typedef unsigned int Place; |
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#define UNDEFINED_PLACE 0 // ie: "no place" |
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#define ANY_PLACE 0xFFFF |
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enum NavErrorType |
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{ |
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NAV_OK, |
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NAV_CANT_ACCESS_FILE, |
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NAV_INVALID_FILE, |
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NAV_BAD_FILE_VERSION, |
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NAV_FILE_OUT_OF_DATE, |
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NAV_CORRUPT_DATA, |
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NAV_OUT_OF_MEMORY, |
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}; |
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enum NavAttributeType |
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{ |
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NAV_MESH_INVALID = 0, |
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NAV_MESH_CROUCH = 0x00000001, // must crouch to use this node/area |
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NAV_MESH_JUMP = 0x00000002, // must jump to traverse this area (only used during generation) |
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NAV_MESH_PRECISE = 0x00000004, // do not adjust for obstacles, just move along area |
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NAV_MESH_NO_JUMP = 0x00000008, // inhibit discontinuity jumping |
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NAV_MESH_STOP = 0x00000010, // must stop when entering this area |
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NAV_MESH_RUN = 0x00000020, // must run to traverse this area |
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NAV_MESH_WALK = 0x00000040, // must walk to traverse this area |
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NAV_MESH_AVOID = 0x00000080, // avoid this area unless alternatives are too dangerous |
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NAV_MESH_TRANSIENT = 0x00000100, // area may become blocked, and should be periodically checked |
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NAV_MESH_DONT_HIDE = 0x00000200, // area should not be considered for hiding spot generation |
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NAV_MESH_STAND = 0x00000400, // bots hiding in this area should stand |
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NAV_MESH_NO_HOSTAGES = 0x00000800, // hostages shouldn't use this area |
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NAV_MESH_STAIRS = 0x00001000, // this area represents stairs, do not attempt to climb or jump them - just walk up |
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NAV_MESH_NO_MERGE = 0x00002000, // don't merge this area with adjacent areas |
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NAV_MESH_OBSTACLE_TOP = 0x00004000, // this nav area is the climb point on the tip of an obstacle |
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NAV_MESH_CLIFF = 0x00008000, // this nav area is adjacent to a drop of at least CliffHeight |
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NAV_MESH_FIRST_CUSTOM = 0x00010000, // apps may define custom app-specific bits starting with this value |
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NAV_MESH_LAST_CUSTOM = 0x04000000, // apps must not define custom app-specific bits higher than with this value |
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NAV_MESH_FUNC_COST = 0x20000000, // area has designer specified cost controlled by func_nav_cost entities |
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NAV_MESH_HAS_ELEVATOR = 0x40000000, // area is in an elevator's path |
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NAV_MESH_NAV_BLOCKER = 0x80000000 // area is blocked by nav blocker ( Alas, needed to hijack a bit in the attributes to get within a cache line [7/24/2008 tom]) |
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}; |
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extern NavAttributeType NameToNavAttribute( const char *name ); |
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enum NavDirType |
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{ |
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NORTH = 0, |
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EAST = 1, |
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SOUTH = 2, |
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WEST = 3, |
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NUM_DIRECTIONS |
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}; |
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/** |
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* Defines possible ways to move from one area to another |
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*/ |
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enum NavTraverseType |
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{ |
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// NOTE: First 4 directions MUST match NavDirType |
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GO_NORTH = 0, |
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GO_EAST, |
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GO_SOUTH, |
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GO_WEST, |
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GO_LADDER_UP, |
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GO_LADDER_DOWN, |
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GO_JUMP, |
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GO_ELEVATOR_UP, |
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GO_ELEVATOR_DOWN, |
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NUM_TRAVERSE_TYPES |
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}; |
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enum NavCornerType |
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{ |
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NORTH_WEST = 0, |
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NORTH_EAST = 1, |
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SOUTH_EAST = 2, |
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SOUTH_WEST = 3, |
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NUM_CORNERS |
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}; |
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enum NavRelativeDirType |
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{ |
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FORWARD = 0, |
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RIGHT, |
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BACKWARD, |
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LEFT, |
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UP, |
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DOWN, |
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NUM_RELATIVE_DIRECTIONS |
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}; |
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struct Extent |
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{ |
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Vector lo, hi; |
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void Init( void ) |
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{ |
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lo.Init(); |
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hi.Init(); |
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} |
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void Init( CBaseEntity *entity ) |
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{ |
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entity->CollisionProp()->WorldSpaceSurroundingBounds( &lo, &hi ); |
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} |
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float SizeX( void ) const { return hi.x - lo.x; } |
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float SizeY( void ) const { return hi.y - lo.y; } |
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float SizeZ( void ) const { return hi.z - lo.z; } |
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float Area( void ) const { return SizeX() * SizeY(); } |
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// Increase bounds to contain the given point |
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void Encompass( const Vector &pos ) |
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{ |
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for ( int i=0; i<3; ++i ) |
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{ |
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if ( pos[i] < lo[i] ) |
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{ |
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lo[i] = pos[i]; |
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} |
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else if ( pos[i] > hi[i] ) |
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{ |
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hi[i] = pos[i]; |
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} |
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} |
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} |
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// Increase bounds to contain the given extent |
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void Encompass( const Extent &extent ) |
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{ |
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Encompass( extent.lo ); |
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Encompass( extent.hi ); |
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} |
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// return true if 'pos' is inside of this extent |
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bool Contains( const Vector &pos ) const |
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{ |
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return (pos.x >= lo.x && pos.x <= hi.x && |
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pos.y >= lo.y && pos.y <= hi.y && |
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pos.z >= lo.z && pos.z <= hi.z); |
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} |
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// return true if this extent overlaps the given one |
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bool IsOverlapping( const Extent &other ) const |
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{ |
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return (lo.x <= other.hi.x && hi.x >= other.lo.x && |
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lo.y <= other.hi.y && hi.y >= other.lo.y && |
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lo.z <= other.hi.z && hi.z >= other.lo.z); |
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} |
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// return true if this extent completely contains the given one |
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bool IsEncompassing( const Extent &other, float tolerance = 0.0f ) const |
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{ |
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return (lo.x <= other.lo.x + tolerance && hi.x >= other.hi.x - tolerance && |
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lo.y <= other.lo.y + tolerance && hi.y >= other.hi.y - tolerance && |
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lo.z <= other.lo.z + tolerance && hi.z >= other.hi.z - tolerance); |
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} |
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}; |
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struct Ray |
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{ |
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Vector from, to; |
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}; |
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class CNavArea; |
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class CNavNode; |
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//-------------------------------------------------------------------------------------------------------------- |
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inline NavDirType OppositeDirection( NavDirType dir ) |
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{ |
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switch( dir ) |
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{ |
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case NORTH: return SOUTH; |
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case SOUTH: return NORTH; |
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case EAST: return WEST; |
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case WEST: return EAST; |
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default: break; |
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} |
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return NORTH; |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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inline NavDirType DirectionLeft( NavDirType dir ) |
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{ |
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switch( dir ) |
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{ |
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case NORTH: return WEST; |
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case SOUTH: return EAST; |
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case EAST: return NORTH; |
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case WEST: return SOUTH; |
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default: break; |
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} |
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return NORTH; |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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inline NavDirType DirectionRight( NavDirType dir ) |
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{ |
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switch( dir ) |
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{ |
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case NORTH: return EAST; |
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case SOUTH: return WEST; |
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case EAST: return SOUTH; |
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case WEST: return NORTH; |
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default: break; |
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} |
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return NORTH; |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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inline void AddDirectionVector( Vector *v, NavDirType dir, float amount ) |
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{ |
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switch( dir ) |
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{ |
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case NORTH: v->y -= amount; return; |
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case SOUTH: v->y += amount; return; |
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case EAST: v->x += amount; return; |
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case WEST: v->x -= amount; return; |
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default: break; |
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} |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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inline float DirectionToAngle( NavDirType dir ) |
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{ |
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switch( dir ) |
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{ |
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case NORTH: return 270.0f; |
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case SOUTH: return 90.0f; |
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case EAST: return 0.0f; |
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case WEST: return 180.0f; |
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default: break; |
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} |
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return 0.0f; |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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inline NavDirType AngleToDirection( float angle ) |
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{ |
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while( angle < 0.0f ) |
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angle += 360.0f; |
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while( angle > 360.0f ) |
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angle -= 360.0f; |
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if (angle < 45 || angle > 315) |
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return EAST; |
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if (angle >= 45 && angle < 135) |
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return SOUTH; |
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if (angle >= 135 && angle < 225) |
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return WEST; |
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return NORTH; |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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inline void DirectionToVector2D( NavDirType dir, Vector2D *v ) |
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{ |
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switch( dir ) |
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{ |
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case NORTH: v->x = 0.0f; v->y = -1.0f; break; |
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case SOUTH: v->x = 0.0f; v->y = 1.0f; break; |
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case EAST: v->x = 1.0f; v->y = 0.0f; break; |
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case WEST: v->x = -1.0f; v->y = 0.0f; break; |
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default: break; |
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} |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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inline void CornerToVector2D( NavCornerType dir, Vector2D *v ) |
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{ |
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switch( dir ) |
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{ |
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case NORTH_WEST: v->x = -1.0f; v->y = -1.0f; break; |
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case NORTH_EAST: v->x = 1.0f; v->y = -1.0f; break; |
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case SOUTH_EAST: v->x = 1.0f; v->y = 1.0f; break; |
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case SOUTH_WEST: v->x = -1.0f; v->y = 1.0f; break; |
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default: break; |
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} |
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v->NormalizeInPlace(); |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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// Gets the corner types that surround the given direction |
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inline void GetCornerTypesInDirection( NavDirType dir, NavCornerType *first, NavCornerType *second ) |
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{ |
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switch ( dir ) |
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{ |
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case NORTH: |
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*first = NORTH_WEST; |
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*second = NORTH_EAST; |
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break; |
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case SOUTH: |
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*first = SOUTH_WEST; |
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*second = SOUTH_EAST; |
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break; |
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case EAST: |
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*first = NORTH_EAST; |
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*second = SOUTH_EAST; |
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break; |
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case WEST: |
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*first = NORTH_WEST; |
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*second = SOUTH_WEST; |
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break; |
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default: |
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break; |
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} |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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inline float RoundToUnits( float val, float unit ) |
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{ |
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val = val + ((val < 0.0f) ? -unit*0.5f : unit*0.5f); |
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return (float)( unit * ( ((int)val) / (int)unit ) ); |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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/** |
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* Return true if given entity can be ignored when moving |
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*/ |
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#define WALK_THRU_PROP_DOORS 0x01 |
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#define WALK_THRU_FUNC_DOORS 0x02 |
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#define WALK_THRU_DOORS (WALK_THRU_PROP_DOORS | WALK_THRU_FUNC_DOORS) |
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#define WALK_THRU_BREAKABLES 0x04 |
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#define WALK_THRU_TOGGLE_BRUSHES 0x08 |
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#define WALK_THRU_EVERYTHING (WALK_THRU_DOORS | WALK_THRU_BREAKABLES | WALK_THRU_TOGGLE_BRUSHES) |
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extern ConVar nav_solid_props; |
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inline bool IsEntityWalkable( CBaseEntity *entity, unsigned int flags ) |
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{ |
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if (FClassnameIs( entity, "worldspawn" )) |
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return false; |
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if (FClassnameIs( entity, "player" )) |
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return false; |
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// if we hit a door, assume its walkable because it will open when we touch it |
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if (FClassnameIs( entity, "func_door*" )) |
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{ |
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#ifdef PROBLEMATIC // cp_dustbowl doors dont open by touch - they use surrounding triggers |
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if ( !entity->HasSpawnFlags( SF_DOOR_PTOUCH ) ) |
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{ |
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// this door is not opened by touching it, if it is closed, the area is blocked |
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CBaseDoor *door = (CBaseDoor *)entity; |
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return door->m_toggle_state == TS_AT_TOP; |
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} |
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#endif // _DEBUG |
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return (flags & WALK_THRU_FUNC_DOORS) ? true : false; |
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} |
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if (FClassnameIs( entity, "prop_door*" )) |
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{ |
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return (flags & WALK_THRU_PROP_DOORS) ? true : false; |
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} |
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// if we hit a clip brush, ignore it if it is not BRUSHSOLID_ALWAYS |
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if (FClassnameIs( entity, "func_brush" )) |
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{ |
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CFuncBrush *brush = (CFuncBrush *)entity; |
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switch ( brush->m_iSolidity ) |
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{ |
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case CFuncBrush::BRUSHSOLID_ALWAYS: |
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return false; |
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case CFuncBrush::BRUSHSOLID_NEVER: |
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return true; |
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case CFuncBrush::BRUSHSOLID_TOGGLE: |
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return (flags & WALK_THRU_TOGGLE_BRUSHES) ? true : false; |
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} |
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} |
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// if we hit a breakable object, assume its walkable because we will shoot it when we touch it |
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if (FClassnameIs( entity, "func_breakable" ) && entity->GetHealth() && entity->m_takedamage == DAMAGE_YES) |
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return (flags & WALK_THRU_BREAKABLES) ? true : false; |
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if (FClassnameIs( entity, "func_breakable_surf" ) && entity->m_takedamage == DAMAGE_YES) |
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return (flags & WALK_THRU_BREAKABLES) ? true : false; |
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if ( FClassnameIs( entity, "func_playerinfected_clip" ) == true ) |
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return true; |
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if ( nav_solid_props.GetBool() && FClassnameIs( entity, "prop_*" ) ) |
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return true; |
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return false; |
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} |
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//-------------------------------------------------------------------------------------------------------------- |
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/** |
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* Trace filter that ignores players, NPCs, and objects that can be walked through |
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*/ |
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class CTraceFilterWalkableEntities : public CTraceFilterNoNPCsOrPlayer |
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{ |
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public: |
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CTraceFilterWalkableEntities( const IHandleEntity *passentity, int collisionGroup, unsigned int flags ) |
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: CTraceFilterNoNPCsOrPlayer( passentity, collisionGroup ), m_flags( flags ) |
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{ |
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} |
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virtual bool ShouldHitEntity( IHandleEntity *pServerEntity, int contentsMask ) |
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{ |
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if ( CTraceFilterNoNPCsOrPlayer::ShouldHitEntity(pServerEntity, contentsMask) ) |
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{ |
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CBaseEntity *pEntity = EntityFromEntityHandle( pServerEntity ); |
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return ( !IsEntityWalkable( pEntity, m_flags ) ); |
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} |
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return false; |
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} |
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private: |
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unsigned int m_flags; |
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}; |
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extern bool IsWalkableTraceLineClear( const Vector &from, const Vector &to, unsigned int flags = 0 ); |
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#endif // _NAV_H_
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