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halflife-sdk-steam/cl_dll/in_camera.cpp

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C++

//========= Copyright © 1996-2002, Valve LLC, All rights reserved. ============
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================
#include "hud.h"
#include "cl_util.h"
#include "camera.h"
#include "kbutton.h"
#include "cvardef.h"
#include "usercmd.h"
#include "const.h"
#include "camera.h"
#include "in_defs.h"
#include "Exports.h"
#include "SDL2/SDL_mouse.h"
#include "port.h"
float CL_KeyState (kbutton_t *key);
extern cl_enginefunc_t gEngfuncs;
//-------------------------------------------------- Constants
#define CAM_DIST_DELTA 1.0
#define CAM_ANGLE_DELTA 2.5
#define CAM_ANGLE_SPEED 2.5
#define CAM_MIN_DIST 30.0
#define CAM_ANGLE_MOVE .5
#define MAX_ANGLE_DIFF 10.0
#define PITCH_MAX 90.0
#define PITCH_MIN 0
#define YAW_MAX 135.0
#define YAW_MIN -135.0
enum ECAM_Command
{
CAM_COMMAND_NONE = 0,
CAM_COMMAND_TOTHIRDPERSON = 1,
CAM_COMMAND_TOFIRSTPERSON = 2
};
//-------------------------------------------------- Global Variables
cvar_t *cam_command;
cvar_t *cam_snapto;
cvar_t *cam_idealyaw;
cvar_t *cam_idealpitch;
cvar_t *cam_idealdist;
cvar_t *cam_contain;
cvar_t *c_maxpitch;
cvar_t *c_minpitch;
cvar_t *c_maxyaw;
cvar_t *c_minyaw;
cvar_t *c_maxdistance;
cvar_t *c_mindistance;
// pitch, yaw, dist
vec3_t cam_ofs;
// In third person
int cam_thirdperson;
int cam_mousemove; //true if we are moving the cam with the mouse, False if not
int iMouseInUse=0;
int cam_distancemove;
extern int mouse_x, mouse_y; //used to determine what the current x and y values are
int cam_old_mouse_x, cam_old_mouse_y; //holds the last ticks mouse movement
POINT cam_mouse;
//-------------------------------------------------- Local Variables
static kbutton_t cam_pitchup, cam_pitchdown, cam_yawleft, cam_yawright;
static kbutton_t cam_in, cam_out, cam_move;
//-------------------------------------------------- Prototypes
void CAM_ToThirdPerson(void);
void CAM_ToFirstPerson(void);
void CAM_StartDistance(void);
void CAM_EndDistance(void);
void SDL_GetCursorPos( POINT *p )
{
gEngfuncs.GetMousePosition( (int *)&p->x, (int *)&p->y );
// SDL_GetMouseState( (int *)&p->x, (int *)&p->y );
}
void SDL_SetCursorPos( const int x, const int y )
{
}
//-------------------------------------------------- Local Functions
float MoveToward( float cur, float goal, float maxspeed )
{
if( cur != goal )
{
if( abs( cur - goal ) > 180.0 )
{
if( cur < goal )
cur += 360.0;
else
cur -= 360.0;
}
if( cur < goal )
{
if( cur < goal - 1.0 )
cur += ( goal - cur ) / 4.0;
else
cur = goal;
}
else
{
if( cur > goal + 1.0 )
cur -= ( cur - goal ) / 4.0;
else
cur = goal;
}
}
// bring cur back into range
if( cur < 0 )
cur += 360.0;
else if( cur >= 360 )
cur -= 360;
return cur;
}
//-------------------------------------------------- Gobal Functions
typedef struct
{
vec3_t boxmins, boxmaxs;// enclose the test object along entire move
float *mins, *maxs; // size of the moving object
vec3_t mins2, maxs2; // size when clipping against mosnters
float *start, *end;
trace_t trace;
int type;
edict_t *passedict;
qboolean monsterclip;
} moveclip_t;
extern trace_t SV_ClipMoveToEntity (edict_t *ent, vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end);
void CL_DLLEXPORT CAM_Think( void )
{
// RecClCamThink();
vec3_t origin;
vec3_t ext, pnt, camForward, camRight, camUp;
moveclip_t clip;
float dist;
vec3_t camAngles;
float flSensitivity;
#ifdef LATER
int i;
#endif
vec3_t viewangles;
switch( (int) cam_command->value )
{
case CAM_COMMAND_TOTHIRDPERSON:
CAM_ToThirdPerson();
break;
case CAM_COMMAND_TOFIRSTPERSON:
CAM_ToFirstPerson();
break;
case CAM_COMMAND_NONE:
default:
break;
}
if( !cam_thirdperson )
return;
#ifdef LATER
if ( cam_contain->value )
{
gEngfuncs.GetClientOrigin( origin );
ext[0] = ext[1] = ext[2] = 0.0;
}
#endif
camAngles[ PITCH ] = cam_idealpitch->value;
camAngles[ YAW ] = cam_idealyaw->value;
dist = cam_idealdist->value;
//
//movement of the camera with the mouse
//
if (cam_mousemove)
{
//get windows cursor position
SDL_GetCursorPos (&cam_mouse);
//check for X delta values and adjust accordingly
//eventually adjust YAW based on amount of movement
//don't do any movement of the cam using YAW/PITCH if we are zooming in/out the camera
if (!cam_distancemove)
{
//keep the camera within certain limits around the player (ie avoid certain bad viewing angles)
if (cam_mouse.x>gEngfuncs.GetWindowCenterX())
{
//if ((camAngles[YAW]>=225.0)||(camAngles[YAW]<135.0))
if (camAngles[YAW]<c_maxyaw->value)
{
camAngles[ YAW ] += (CAM_ANGLE_MOVE)*((cam_mouse.x-gEngfuncs.GetWindowCenterX())/2);
}
if (camAngles[YAW]>c_maxyaw->value)
{
camAngles[YAW]=c_maxyaw->value;
}
}
else if (cam_mouse.x<gEngfuncs.GetWindowCenterX())
{
//if ((camAngles[YAW]<=135.0)||(camAngles[YAW]>225.0))
if (camAngles[YAW]>c_minyaw->value)
{
camAngles[ YAW ] -= (CAM_ANGLE_MOVE)* ((gEngfuncs.GetWindowCenterX()-cam_mouse.x)/2);
}
if (camAngles[YAW]<c_minyaw->value)
{
camAngles[YAW]=c_minyaw->value;
}
}
//check for y delta values and adjust accordingly
//eventually adjust PITCH based on amount of movement
//also make sure camera is within bounds
if (cam_mouse.y>gEngfuncs.GetWindowCenterY())
{
if(camAngles[PITCH]<c_maxpitch->value)
{
camAngles[PITCH] +=(CAM_ANGLE_MOVE)* ((cam_mouse.y-gEngfuncs.GetWindowCenterY())/2);
}
if (camAngles[PITCH]>c_maxpitch->value)
{
camAngles[PITCH]=c_maxpitch->value;
}
}
else if (cam_mouse.y<gEngfuncs.GetWindowCenterY())
{
if (camAngles[PITCH]>c_minpitch->value)
{
camAngles[PITCH] -= (CAM_ANGLE_MOVE)*((gEngfuncs.GetWindowCenterY()-cam_mouse.y)/2);
}
if (camAngles[PITCH]<c_minpitch->value)
{
camAngles[PITCH]=c_minpitch->value;
}
}
//set old mouse coordinates to current mouse coordinates
//since we are done with the mouse
if ( ( flSensitivity = gHUD.GetSensitivity() ) != 0 )
{
cam_old_mouse_x=cam_mouse.x*flSensitivity;
cam_old_mouse_y=cam_mouse.y*flSensitivity;
}
else
{
cam_old_mouse_x=cam_mouse.x;
cam_old_mouse_y=cam_mouse.y;
}
SDL_SetCursorPos (gEngfuncs.GetWindowCenterX(), gEngfuncs.GetWindowCenterY());
}
}
//Nathan code here
if( CL_KeyState( &cam_pitchup ) )
camAngles[ PITCH ] += CAM_ANGLE_DELTA;
else if( CL_KeyState( &cam_pitchdown ) )
camAngles[ PITCH ] -= CAM_ANGLE_DELTA;
if( CL_KeyState( &cam_yawleft ) )
camAngles[ YAW ] -= CAM_ANGLE_DELTA;
else if( CL_KeyState( &cam_yawright ) )
camAngles[ YAW ] += CAM_ANGLE_DELTA;
if( CL_KeyState( &cam_in ) )
{
dist -= CAM_DIST_DELTA;
if( dist < CAM_MIN_DIST )
{
// If we go back into first person, reset the angle
camAngles[ PITCH ] = 0;
camAngles[ YAW ] = 0;
dist = CAM_MIN_DIST;
}
}
else if( CL_KeyState( &cam_out ) )
dist += CAM_DIST_DELTA;
if (cam_distancemove)
{
if (cam_mouse.y>gEngfuncs.GetWindowCenterY())
{
if(dist<c_maxdistance->value)
{
dist +=CAM_DIST_DELTA * ((cam_mouse.y-gEngfuncs.GetWindowCenterY())/2);
}
if (dist>c_maxdistance->value)
{
dist=c_maxdistance->value;
}
}
else if (cam_mouse.y<gEngfuncs.GetWindowCenterY())
{
if (dist>c_mindistance->value)
{
dist -= (CAM_DIST_DELTA)*((gEngfuncs.GetWindowCenterY()-cam_mouse.y)/2);
}
if (dist<c_mindistance->value)
{
dist=c_mindistance->value;
}
}
//set old mouse coordinates to current mouse coordinates
//since we are done with the mouse
cam_old_mouse_x=cam_mouse.x*gHUD.GetSensitivity();
cam_old_mouse_y=cam_mouse.y*gHUD.GetSensitivity();
SDL_SetCursorPos (gEngfuncs.GetWindowCenterX(), gEngfuncs.GetWindowCenterY());
}
#ifdef LATER
if( cam_contain->value )
{
// check new ideal
VectorCopy( origin, pnt );
AngleVectors( camAngles, camForward, camRight, camUp );
for (i=0 ; i<3 ; i++)
pnt[i] += -dist*camForward[i];
// check line from r_refdef.vieworg to pnt
memset ( &clip, 0, sizeof ( moveclip_t ) );
clip.trace = SV_ClipMoveToEntity( sv.edicts, r_refdef.vieworg, ext, ext, pnt );
if( clip.trace.fraction == 1.0 )
{
// update ideal
cam_idealpitch->value = camAngles[ PITCH ];
cam_idealyaw->value = camAngles[ YAW ];
cam_idealdist->value = dist;
}
}
else
#endif
{
// update ideal
cam_idealpitch->value = camAngles[ PITCH ];
cam_idealyaw->value = camAngles[ YAW ];
cam_idealdist->value = dist;
}
// Move towards ideal
VectorCopy( cam_ofs, camAngles );
gEngfuncs.GetViewAngles( (float *)viewangles );
if( cam_snapto->value )
{
camAngles[ YAW ] = cam_idealyaw->value + viewangles[ YAW ];
camAngles[ PITCH ] = cam_idealpitch->value + viewangles[ PITCH ];
camAngles[ 2 ] = cam_idealdist->value;
}
else
{
if( camAngles[ YAW ] - viewangles[ YAW ] != cam_idealyaw->value )
camAngles[ YAW ] = MoveToward( camAngles[ YAW ], cam_idealyaw->value + viewangles[ YAW ], CAM_ANGLE_SPEED );
if( camAngles[ PITCH ] - viewangles[ PITCH ] != cam_idealpitch->value )
camAngles[ PITCH ] = MoveToward( camAngles[ PITCH ], cam_idealpitch->value + viewangles[ PITCH ], CAM_ANGLE_SPEED );
if( abs( camAngles[ 2 ] - cam_idealdist->value ) < 2.0 )
camAngles[ 2 ] = cam_idealdist->value;
else
camAngles[ 2 ] += ( cam_idealdist->value - camAngles[ 2 ] ) / 4.0;
}
#ifdef LATER
if( cam_contain->value )
{
// Test new position
dist = camAngles[ ROLL ];
camAngles[ ROLL ] = 0;
VectorCopy( origin, pnt );
AngleVectors( camAngles, camForward, camRight, camUp );
for (i=0 ; i<3 ; i++)
pnt[i] += -dist*camForward[i];
// check line from r_refdef.vieworg to pnt
memset ( &clip, 0, sizeof ( moveclip_t ) );
ext[0] = ext[1] = ext[2] = 0.0;
clip.trace = SV_ClipMoveToEntity( sv.edicts, r_refdef.vieworg, ext, ext, pnt );
if( clip.trace.fraction != 1.0 )
return;
}
#endif
cam_ofs[ 0 ] = camAngles[ 0 ];
cam_ofs[ 1 ] = camAngles[ 1 ];
cam_ofs[ 2 ] = dist;
}
extern void KeyDown (kbutton_t *b); // HACK
extern void KeyUp (kbutton_t *b); // HACK
void CAM_PitchUpDown(void) { KeyDown( &cam_pitchup ); }
void CAM_PitchUpUp(void) { KeyUp( &cam_pitchup ); }
void CAM_PitchDownDown(void) { KeyDown( &cam_pitchdown ); }
void CAM_PitchDownUp(void) { KeyUp( &cam_pitchdown ); }
void CAM_YawLeftDown(void) { KeyDown( &cam_yawleft ); }
void CAM_YawLeftUp(void) { KeyUp( &cam_yawleft ); }
void CAM_YawRightDown(void) { KeyDown( &cam_yawright ); }
void CAM_YawRightUp(void) { KeyUp( &cam_yawright ); }
void CAM_InDown(void) { KeyDown( &cam_in ); }
void CAM_InUp(void) { KeyUp( &cam_in ); }
void CAM_OutDown(void) { KeyDown( &cam_out ); }
void CAM_OutUp(void) { KeyUp( &cam_out ); }
void CAM_ToThirdPerson(void)
{
vec3_t viewangles;
#if !defined( _DEBUG )
if ( gEngfuncs.GetMaxClients() > 1 )
{
// no thirdperson in multiplayer.
return;
}
#endif
gEngfuncs.GetViewAngles( (float *)viewangles );
if( !cam_thirdperson )
{
cam_thirdperson = 1;
cam_ofs[ YAW ] = viewangles[ YAW ];
cam_ofs[ PITCH ] = viewangles[ PITCH ];
cam_ofs[ 2 ] = CAM_MIN_DIST;
}
gEngfuncs.Cvar_SetValue( "cam_command", 0 );
}
void CAM_ToFirstPerson(void)
{
cam_thirdperson = 0;
gEngfuncs.Cvar_SetValue( "cam_command", 0 );
}
void CAM_ToggleSnapto( void )
{
cam_snapto->value = !cam_snapto->value;
}
void CAM_Init( void )
{
gEngfuncs.pfnAddCommand( "+campitchup", CAM_PitchUpDown );
gEngfuncs.pfnAddCommand( "-campitchup", CAM_PitchUpUp );
gEngfuncs.pfnAddCommand( "+campitchdown", CAM_PitchDownDown );
gEngfuncs.pfnAddCommand( "-campitchdown", CAM_PitchDownUp );
gEngfuncs.pfnAddCommand( "+camyawleft", CAM_YawLeftDown );
gEngfuncs.pfnAddCommand( "-camyawleft", CAM_YawLeftUp );
gEngfuncs.pfnAddCommand( "+camyawright", CAM_YawRightDown );
gEngfuncs.pfnAddCommand( "-camyawright", CAM_YawRightUp );
gEngfuncs.pfnAddCommand( "+camin", CAM_InDown );
gEngfuncs.pfnAddCommand( "-camin", CAM_InUp );
gEngfuncs.pfnAddCommand( "+camout", CAM_OutDown );
gEngfuncs.pfnAddCommand( "-camout", CAM_OutUp );
gEngfuncs.pfnAddCommand( "thirdperson", CAM_ToThirdPerson );
gEngfuncs.pfnAddCommand( "firstperson", CAM_ToFirstPerson );
gEngfuncs.pfnAddCommand( "+cammousemove",CAM_StartMouseMove);
gEngfuncs.pfnAddCommand( "-cammousemove",CAM_EndMouseMove);
gEngfuncs.pfnAddCommand( "+camdistance", CAM_StartDistance );
gEngfuncs.pfnAddCommand( "-camdistance", CAM_EndDistance );
gEngfuncs.pfnAddCommand( "snapto", CAM_ToggleSnapto );
cam_command = gEngfuncs.pfnRegisterVariable ( "cam_command", "0", 0 ); // tells camera to go to thirdperson
cam_snapto = gEngfuncs.pfnRegisterVariable ( "cam_snapto", "0", 0 ); // snap to thirdperson view
cam_idealyaw = gEngfuncs.pfnRegisterVariable ( "cam_idealyaw", "90", 0 ); // thirdperson yaw
cam_idealpitch = gEngfuncs.pfnRegisterVariable ( "cam_idealpitch", "0", 0 ); // thirperson pitch
cam_idealdist = gEngfuncs.pfnRegisterVariable ( "cam_idealdist", "64", 0 ); // thirdperson distance
cam_contain = gEngfuncs.pfnRegisterVariable ( "cam_contain", "0", 0 ); // contain camera to world
c_maxpitch = gEngfuncs.pfnRegisterVariable ( "c_maxpitch", "90.0", 0 );
c_minpitch = gEngfuncs.pfnRegisterVariable ( "c_minpitch", "0.0", 0 );
c_maxyaw = gEngfuncs.pfnRegisterVariable ( "c_maxyaw", "135.0", 0 );
c_minyaw = gEngfuncs.pfnRegisterVariable ( "c_minyaw", "-135.0", 0 );
c_maxdistance = gEngfuncs.pfnRegisterVariable ( "c_maxdistance", "200.0", 0 );
c_mindistance = gEngfuncs.pfnRegisterVariable ( "c_mindistance", "30.0", 0 );
}
void CAM_ClearStates( void )
{
vec3_t viewangles;
gEngfuncs.GetViewAngles( (float *)viewangles );
cam_pitchup.state = 0;
cam_pitchdown.state = 0;
cam_yawleft.state = 0;
cam_yawright.state = 0;
cam_in.state = 0;
cam_out.state = 0;
cam_thirdperson = 0;
cam_command->value = 0;
cam_mousemove=0;
cam_snapto->value = 0;
cam_distancemove = 0;
cam_ofs[ 0 ] = 0.0;
cam_ofs[ 1 ] = 0.0;
cam_ofs[ 2 ] = CAM_MIN_DIST;
cam_idealpitch->value = viewangles[ PITCH ];
cam_idealyaw->value = viewangles[ YAW ];
cam_idealdist->value = CAM_MIN_DIST;
}
void CAM_StartMouseMove(void)
{
float flSensitivity;
//only move the cam with mouse if we are in third person.
if (cam_thirdperson)
{
//set appropriate flags and initialize the old mouse position
//variables for mouse camera movement
if (!cam_mousemove)
{
cam_mousemove=1;
iMouseInUse=1;
SDL_GetCursorPos (&cam_mouse);
if ( ( flSensitivity = gHUD.GetSensitivity() ) != 0 )
{
cam_old_mouse_x=cam_mouse.x*flSensitivity;
cam_old_mouse_y=cam_mouse.y*flSensitivity;
}
else
{
cam_old_mouse_x=cam_mouse.x;
cam_old_mouse_y=cam_mouse.y;
}
}
}
//we are not in 3rd person view..therefore do not allow camera movement
else
{
cam_mousemove=0;
iMouseInUse=0;
}
}
//the key has been released for camera movement
//tell the engine that mouse camera movement is off
void CAM_EndMouseMove(void)
{
cam_mousemove=0;
iMouseInUse=0;
}
//----------------------------------------------------------
//routines to start the process of moving the cam in or out
//using the mouse
//----------------------------------------------------------
void CAM_StartDistance(void)
{
//only move the cam with mouse if we are in third person.
if (cam_thirdperson)
{
//set appropriate flags and initialize the old mouse position
//variables for mouse camera movement
if (!cam_distancemove)
{
cam_distancemove=1;
cam_mousemove=1;
iMouseInUse=1;
SDL_GetCursorPos (&cam_mouse);
cam_old_mouse_x=cam_mouse.x*gHUD.GetSensitivity();
cam_old_mouse_y=cam_mouse.y*gHUD.GetSensitivity();
}
}
//we are not in 3rd person view..therefore do not allow camera movement
else
{
cam_distancemove=0;
cam_mousemove=0;
iMouseInUse=0;
}
}
//the key has been released for camera movement
//tell the engine that mouse camera movement is off
void CAM_EndDistance(void)
{
cam_distancemove=0;
cam_mousemove=0;
iMouseInUse=0;
}
int CL_DLLEXPORT CL_IsThirdPerson( void )
{
// RecClCL_IsThirdPerson();
return (cam_thirdperson ? 1 : 0) || (g_iUser1 && (g_iUser2 == gEngfuncs.GetLocalPlayer()->index) );
}
void CL_DLLEXPORT CL_CameraOffset( float *ofs )
{
// RecClCL_GetCameraOffsets(ofs);
VectorCopy( cam_ofs, ofs );
}