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CAMERA.C
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CAMERA.C
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/* ========================================================================
Copyright (c) 1990,1995 Synergistic Software
All Rights Reserved
========================================================================
Filename: CAMERA.C - handles indoor and outdoor cameras
Author: Chris Phillips & Greg Hightower & Gary Powell
========================================================================
Contains the following general functions:
push_camera -pushes the camera onto the camera stack
pull_camera -pulls a camera from the stack
======================================================================== */
/* ------------------------------------------------------------------------
Includes
------------------------------------------------------------------------ */
#include <stdio.h>
#if defined (_STATUS)
#include "debug.h"
#include "engint.h"
#endif
#include "SYSTEM.H"
#include "ENGINE.H"
#include "MACHINE.H"
#if defined (_STATUS)
#include "winsys\status.h"
void WriteDebug (const char *format, ... );
extern BOOL gfCheckCameraMove;
#else
#define WriteDebug 1?0:printf
#endif
/* ------------------------------------------------------------------------
Notes
------------------------------------------------------------------------ */
/* ------------------------------------------------------------------------
Defines and Compile Flags
------------------------------------------------------------------------ */
#define INITIAL_TARGET_FACTOR 105
#define DEFAULT_LINEAR_RATE 20
#define DEFAULT_ANGLE_RATE 4
#define DEFAULT_PITCH_RATE 4
#define DEFAULT_HEIGHT_RATE 10
#define MAX_HEIGHT -100
#define MAX_PITCH 200
#define MAX_A_SPEED 11 //prime
#define MAX_P_SPEED 19 //prime
#define MAX_XY_SPEED (61 << CAMERA_FIXEDPT) //prime
#define MAX_Z_SPEED 19 //prime
// [d12-06-96 JPC] Defined two camera widths. CAMERA_WIDTH_NARROW is for
// when the person playing the game is moving the camera--then it's possible
// to get through doors. CAMERA_WIDTH_WIDE is for camera auto-move,
// to prevent moving the camera into narrow places where it gets stuck.
#define CAMERA_WIDTH_NARROW 12 // (JPC) was 16
#define CAMERA_WIDTH_WIDE 50
#define CAMERA_HEIGHT 16
#define DEFAULT_CAMERA_Z 64 // [d12-09-96 JPC]
enum {
NO_TARGET_REQUESTED,
SWOOP_CAMERA,
MOVE_CAMERA_EVENLY,
ROTATE_SWOOP_CAMERA,
ROTATE_CAMERA_EVENLY,
ROTATE_CAMERA_AROUND_POINT
};
/* ------------------------------------------------------------------------
Global Variables
------------------------------------------------------------------------ */
CAMERA camera; // used by the engine to do the main view.
LONG camera_stack_ptr=0;
extern BOOL fAIAutoRes;
#if defined (_STATUS)
char gszTemp[80];
#endif
// [d12-09-96 JPC] Some debugging functions.
#if defined (_STATUS)
int gDebug = 0;
/* =======================================================================
Function - DebugCameraMove
Description - Checks whether proposed move is OK.
Returns - TRUE if move is OK
======================================================================== */
BOOL DebugCameraMove (CAMERA *pCamera, FIXED_VECTOR_3D NewPoint)
{
LONG iOldSector;
LONG iNewSector;
LONG x, y, z;
x = pCamera->x >> CAMERA_FIXEDPT;
y = pCamera->y >> CAMERA_FIXEDPT;
iOldSector = point_to_sector (x, y);
x = (pCamera->x + NewPoint.dx) >> CAMERA_FIXEDPT;
y = (pCamera->y + NewPoint.dy) >> CAMERA_FIXEDPT;
iNewSector = point_to_sector (x, y);
if (iOldSector == 321 && iNewSector != 321)
gDebug++;
z = pCamera->z + NewPoint.dz;
if (z < sectors[iNewSector].fh || z > sectors[iNewSector].ch - 16)
return FALSE;
return TRUE;
}
/* =======================================================================
Function - ShowCameraPosition
Description - Updates status bar with camera position.
Returns - Nothing
======================================================================== */
void ShowCameraPosition (CAMERA *pCamera)
{
// LONG iSector;
LONG x, y;
if (!fGraphInitialized)
return;
x = pCamera->x >> CAMERA_FIXEDPT;
y = pCamera->y >> CAMERA_FIXEDPT;
// iSector = point_to_sector (x, y);
wsprintf (gszTemp, "X %d", x);
SetWindowText (ghwndSBx, gszTemp);
wsprintf (gszTemp, "Y %d", y);
SetWindowText (ghwndSBy, gszTemp);
wsprintf (gszTemp, "Z %d", pCamera->z);
SetWindowText (ghwndSBz, gszTemp);
wsprintf (gszTemp, "A %d", pCamera->a);
SetWindowText (ghwndSBa, gszTemp);
wsprintf (gszTemp, "P %d", pCamera->p);
SetWindowText (ghwndSBp, gszTemp);
// wsprintf (gszTemp, "S %d",iSector);
// SetWindowText (ghwndSBs, gszTemp);
}
#endif
/*
NOTE: See engine.h for macro cover functions to change each
of the camera elements individually
*/
/* =======================================================================
Function - InitializeCamera
Description - Set all the vars for a new scene.
Returns - void
======================================================================== */
void InitializeCamera(
CAMERA *pCamera,
const LONG X,
const LONG Y,
const LONG Z,
const LONG A,
const LONG P
)
{
SetCameraPosition(pCamera, X, Y, Z, A, P);
pCamera->Rate[0] = DEFAULT_LINEAR_RATE;
pCamera->Rate[1] = DEFAULT_HEIGHT_RATE;
pCamera->Rate[2] = DEFAULT_ANGLE_RATE;
pCamera->Rate[3] = DEFAULT_PITCH_RATE;
pCamera->TargetFactor = INITIAL_TARGET_FACTOR;
}
/* =======================================================================
Function - SetCameraPosition
Description - sets the position of the active camera
Returns - void
======================================================================== */
void SetCameraPosition(
CAMERA *pCamera,
const LONG x,
const LONG y,
const LONG z,
const LONG a,
const LONG p)
{
pCamera->TargetRequested = NO_TARGET_REQUESTED;
if(x != NO_CHANGE)
{
pCamera->Current.x = pCamera->x = x<<CAMERA_FIXEDPT;
}
if(y != NO_CHANGE)
{
pCamera->Current.y = pCamera->y = y<<CAMERA_FIXEDPT;
}
if(z != NO_CHANGE)
{
pCamera->Current.z = pCamera->z = z;
}
if(a != NO_CHANGE)
{
pCamera->Current.a = pCamera->a = a % 256;
}
if(p != NO_CHANGE)
{
pCamera->Current.p = pCamera->p = p;
}
#if defined (_STATUS)
ShowCameraPosition (pCamera);
#endif
}
/* =======================================================================
Function - SetCameraCurrentPosition
Description - sets the current position of the active camera relative to target
Returns - void
======================================================================== */
void SetCameraCurrentPosition(
CAMERA *pCamera,
const LONG x,
const LONG y,
const LONG z,
const LONG angle,
const LONG p,
const LONG radius)
{
if(x != NO_CHANGE)
{
pCamera->Current.x = x<<CAMERA_FIXEDPT;
}
if(y != NO_CHANGE)
{
pCamera->Current.y = y<<CAMERA_FIXEDPT;
}
if(z != NO_CHANGE)
{
pCamera->Current.z = z;
}
if(angle != NO_CHANGE)
{
pCamera->Current.a = angle % 256; // angle from target to camera
}
if(p != NO_CHANGE)
{
pCamera->Current.p = p;
}
if(radius != NO_CHANGE)
{
pCamera->Current.radius = radius; //distance between target and camera
}
}
/* =======================================================================
Function - SetCameraTarget
Description - Request the position of the active camera
Returns - void
======================================================================== */
void SetCameraTarget(
CAMERA *pCamera,
const LONG Targetx,
const LONG Targety,
const LONG Targetz,
const LONG Targeta,
const LONG Targetp,
const BOOL swoop)
{
pCamera->TargetRequested = (swoop == TRUE) ? SWOOP_CAMERA : MOVE_CAMERA_EVENLY;
pCamera->TargetFactor = INITIAL_TARGET_FACTOR;
if(Targetx != NO_CHANGE)
pCamera->LTarget.x=Targetx;
if(Targety != NO_CHANGE)
pCamera->LTarget.y=Targety;
if(Targetz != NO_CHANGE)
pCamera->LTarget.z=Targetz;
if(Targeta != NO_CHANGE)
pCamera->LTarget.a=Targeta & 0xFF;
if(Targetp != NO_CHANGE)
pCamera->LTarget.p=Targetp;
}
/* =======================================================================
Function - SetCameraRotateTarget
Description - For rotation of the camera about a point.
Returns - void
======================================================================== */
void SetCameraRotateTarget(
CAMERA *pCamera,
const LONG TargetPtX,
const LONG TargetPtY,
const LONG NewZ,
const LONG NewPitch,
const LONG Angle, // Of polar point (a,finalDistance) translated to TargetPtX,Y
const LONG MinRadius,
const LONG FinalDistance,
const BOOL swoop)
{
pCamera->TargetRequested = (swoop == TRUE) ? ROTATE_SWOOP_CAMERA : ROTATE_CAMERA_EVENLY;
//pCamera->TargetFactor = INITIAL_TARGET_FACTOR;
pCamera->RTarget.x = TargetPtX;
pCamera->RTarget.y = TargetPtY;
if (NewZ == NO_CHANGE)
{
pCamera->RTarget.z = pCamera->z;
}
else
{
pCamera->RTarget.z = NewZ;
}
if (NewPitch == NO_CHANGE)
{
pCamera->RTarget.p = pCamera->p;
}
else
{
pCamera->RTarget.p = NewPitch;
}
pCamera->RTarget.a = Angle % 256;
if (MinRadius == NO_CHANGE)
{
const LONG distance = dist(TargetPtX, TargetPtY,
pCamera->x, pCamera->y);
pCamera->RTarget.radius = ABS(distance);
}
else
{
pCamera->RTarget.radius = ABS(MinRadius);
}
if (FinalDistance == NO_CHANGE)
{
const LONG distance = dist(TargetPtX, TargetPtY,
pCamera->x, pCamera->y);
pCamera->RTarget.distance = ABS(distance);
}
else
{
pCamera->RTarget.distance = ABS(FinalDistance);
}
}
/* =======================================================================
Function - SetCameraRotatePointTarget
Description - For rotation of the camera about a point.
Returns - void
======================================================================== */
void SetCameraRotatePointTarget(
CAMERA *pCamera,
const LONG X,
const LONG Y,
const LONG Z,
const LONG Angle,
const LONG Radius,
const BOOL swoop)
{
pCamera->TargetRequested = ROTATE_CAMERA_AROUND_POINT;
if (X != NO_CHANGE)
pCamera->RTarget.x = X<<CAMERA_FIXEDPT;
if (Y != NO_CHANGE)
pCamera->RTarget.y = Y<<CAMERA_FIXEDPT;
if (Angle != NO_CHANGE)
pCamera->RTarget.a = Angle % 256;
if (Radius != NO_CHANGE)
pCamera->RTarget.radius = Radius;
if (Z != NO_CHANGE)
pCamera->RTarget.z = Z;
}
/* =======================================================================
Function - SetCameraRotatePointRates
Description - set the rotate around point movement rates
Returns - void
======================================================================== */
void SetCameraRotatePointRates(
CAMERA *pCamera,
const LONG RadiusRate,
const LONG AngleRate,
const LONG HeightRate,
const LONG PitchRate,
const LONG MinDist,
const LONG MaxDist )
{
pCamera->Rate[0] = RadiusRate;
pCamera->Rate[1] = HeightRate;
pCamera->Rate[2] = AngleRate;
pCamera->Rate[3] = PitchRate;
pCamera->RTarget.distance = MinDist;
pCamera->RTarget.max_distance = MaxDist;
}
/* =======================================================================
Function - SetCameraMotionVars
Description - Change the camera motion paramers.
Returns - void
======================================================================== */
void SetCameraMotionVars(
CAMERA *pCamera,
const LONG TargetFactor,
const LONG LinearRate)
{
if (TargetFactor != NO_CHANGE)
pCamera->TargetFactor = TargetFactor;
if (LinearRate != NO_CHANGE)
pCamera->Rate[0] = LinearRate;
}
/* =======================================================================
Function - MoveCamera
Description - If a target location has been requested move towards it.
Note: No bump checking of things is done, just walls.
Returns - void
======================================================================== */
void MoveCamera(CAMERA *pCamera, const LONG KeyState)
{
#if defined (_STATUS)
gfCheckCameraMove = TRUE;
#endif
switch (pCamera->TargetRequested)
{
case SWOOP_CAMERA:
SwoopCamera(pCamera);
break;
case MOVE_CAMERA_EVENLY:
MoveCameraEvenly(pCamera);
break;
case ROTATE_SWOOP_CAMERA:
RotateSwoopCamera(pCamera); // individual combat
break;
case ROTATE_CAMERA_EVENLY:
RotateCameraEvenly(pCamera);
break;
case ROTATE_CAMERA_AROUND_POINT:
RotateCameraAroundPoint(pCamera, KeyState); // battle and individual combat
break;
case NO_TARGET_REQUESTED:
{
LONG force_x = 0;
LONG force_y = 0;
LONG force_z = 0;
LONG force_a = 0;
LONG force_p = 0;
/* -----------------------------------------------------------------
Create movement force vectors
----------------------------------------------------------------- */
/* ---------------------------------------------------------------- */
/* forward/backward */
if (KeyState & KEY_FORWARD_BIT )
{
force_y += MAX_XY_SPEED;
}
if (KeyState & KEY_BACKWARD_BIT)
{
force_y -= MAX_XY_SPEED;
}
/* ---------------------------------------------------------------- */
/* slide left/right */
if (KeyState & KEY_SLIDELEFT_BIT)
{
force_x -= MAX_XY_SPEED;
}
if (KeyState & KEY_SLIDERIGHT_BIT)
{
force_x += MAX_XY_SPEED;
}
/* ---------------------------------------------------------------- */
/* climb up */
if (KeyState & KEY_UP_BIT)
{
force_z += MAX_Z_SPEED;
}
else
/* climb down */
if (KeyState & KEY_DOWN_BIT)
{
force_z -= MAX_Z_SPEED;
}
/* ---------------------------------------------------------------- */
/* rotate left/right */
if (KeyState & KEY_LEFT_BIT)
{
force_a -= MAX_A_SPEED;
}
if (KeyState & KEY_RIGHT_BIT)
{
force_a += MAX_A_SPEED;
}
/* ---------------------------------------------------------------- */
/* Pitch */
if (KeyState & KEY_LOOKUP_BIT)
{
if (pCamera->p < MAX_PITCH)
force_p += MAX_P_SPEED;
}
else
if (KeyState & KEY_LOOKDOWN_BIT)
{
if (pCamera->p > -MAX_PITCH)
force_p -= MAX_P_SPEED;
}
pCamera->p += force_p;
if (pCamera->p < -MAX_PITCH)
{
pCamera->p = -MAX_PITCH;
}
else
if (pCamera->p > MAX_PITCH)
{
pCamera->p = MAX_PITCH;
}
/* -----------------------------------------------------------------
Now put into effect the force and accel/decel
----------------------------------------------------------------- */
if (ABS(pCamera->vx) > ABS(force_x))
{
// decel in the x
LONG temp = (pCamera->vx - force_x) / 2;
if(temp == 0)
pCamera->vx = 0;
else
pCamera->vx -= temp;
}
else
if (ABS(pCamera->vx) < ABS(force_x))
{
// accel in the x
pCamera->vx += (force_x - pCamera->vx) / 5;
if (ABS(pCamera->vx) > ABS(force_x))
pCamera->vx = force_x;
}
/* ---------------------------------------------------------------- */
if (ABS(pCamera->vy) > ABS(force_y))
{
// decel in the y
LONG temp = (pCamera->vy - force_y) / 2;
if(temp == 0)
pCamera->vy = 0;
else
pCamera->vy -= temp;
}
else
if (ABS(pCamera->vy) < ABS(force_y))
{
// accel in the y
pCamera->vy += (force_y - pCamera->vy) / 5;
if (ABS(pCamera->vy) > ABS(force_y))
pCamera->vy = force_y;
}
/* ---------------------------------------------------------------- */
if (ABS(pCamera->vz) > ABS(force_z))
{
// decel in the z
LONG temp = (pCamera->vz - force_z) / 2;
if(temp == 0)
pCamera->vz = 0;
else
pCamera->vz -= temp;
}
else
if (ABS(pCamera->vz) < ABS(force_z))
{
// accel in the z
pCamera->vz += (force_z - pCamera->vz) / 5;
if (ABS(pCamera->vz) > ABS(force_z))
pCamera->vz = force_z;
}
/* ---------------------------------------------------------------- */
// now rotate and add the new vector
if(pCamera->vx != 0 ||
pCamera->vy != 0 ||
pCamera->vz != 0
)
{
FIXED_VECTOR_3D NewVector;
//NewVector.dx = pCamera->vx << PLAYER_FIXEDPT;
//NewVector.dy = pCamera->vy << PLAYER_FIXEDPT;
NewVector.dx = pCamera->vx;
NewVector.dy = pCamera->vy;
NewVector.dz = pCamera->vz;
Rotate((POINT *)&NewVector, pCamera->a);
if(KeyState & KEY_WALKTHRUWALL_BIT)
{
pCamera->x += NewVector.dx;
pCamera->y += NewVector.dy;
pCamera->z += NewVector.dz;
}
else
{
PLAYER TempPlayer;
LONG BumpDistance;
//TempPlayer.x = pCamera->x << PLAYER_FIXEDPT;
//TempPlayer.y = pCamera->y << PLAYER_FIXEDPT;
TempPlayer.x = pCamera->x;
TempPlayer.y = pCamera->y;
TempPlayer.z = pCamera->z;
TempPlayer.w = CAMERA_WIDTH_NARROW;
TempPlayer.h = CAMERA_HEIGHT;
TempPlayer.a = pCamera->a;
TempPlayer.p = pCamera->p;
TempPlayer.Flying = TRUE;
TempPlayer.ThingIndex = fERROR;
TempPlayer.bump = iNOTHING;
TempPlayer.BumpIndex = fERROR;
CheckMoveSimple(&TempPlayer, &NewVector, 0, &BumpDistance);
// NewVector.dx << PLAYER_FIXEDPT;
// NewVector.dy << PLAYER_FIXEDPT;
switch(TempPlayer.bump)
{
case iNOTHING:
pCamera->x += NewVector.dx;
pCamera->y += NewVector.dy;
pCamera->z += NewVector.dz;
break;
case iSLIDE_ON_WALL: //lan Should this line go with iNOTHING??
case iWALL:
pCamera->z += NewVector.dz;
break;
case iFLOOR:
case iCEILING:
//pCamera->x += NewVector.dx;
//pCamera->y += NewVector.dy;
pCamera->z += NewVector.dz;
break;
}
}
}
/* ---------------------------------------------------------------- */
if (ABS(pCamera->va) > ABS(force_a))
{
// decel in the a
LONG temp = (pCamera->va - force_a) / 2;
if(temp == 0)
pCamera->va = 0;
else
pCamera->va -= temp;
}
else
if (ABS(pCamera->va) < ABS(force_a))
{
// accel in the a
pCamera->va += (force_a - pCamera->va) / 5;
if (ABS(pCamera->va) > ABS(force_a))
pCamera->va = force_a;
}
pCamera->a += pCamera->va;
pCamera->a = (pCamera->a%256);
if (pCamera->a<0)
pCamera->a+=256;
#if defined (_WINDOWS)
// [d11-12-96 JPC] Only do autores in Windows; it's no help in DOS and
// causes more bugs.
if( fAIAutoRes )
{
if( force_x || force_y || force_z || force_a || force_p)
{
set_lowres(0L, 0L);
}
else
{
set_hires(0L, 0L);
}
}
#endif
}
break;
}
#if defined (_STATUS)
gfCheckCameraMove = FALSE;
ShowCameraPosition (pCamera);
#endif
}
/* =======================================================================
Function - SwoopCamera
Description - Swoop the camera
Returns - void
======================================================================== */
void SwoopCamera(CAMERA *pCamera)
{
const LONG tx = (pCamera->LTarget.x << CAMERA_FIXEDPT) - pCamera->x;
const LONG ty = (pCamera->LTarget.y << CAMERA_FIXEDPT) - pCamera->y;
const LONG tz = pCamera->LTarget.z - pCamera->z;
LONG ta = pCamera->LTarget.a - pCamera->a;
const LONG tp = pCamera->LTarget.p - pCamera->p;
FIXED_VECTOR_3D NewPoint;
const LONG TargetFactor2 = pCamera->TargetFactor - 1;
PLAYER TempPlayer;
LONG BumpDistance;
// If the camera is at the target position stop moving.
if ((ABS(tx)) <= (3 << CAMERA_FIXEDPT) &&
(ABS(ty)) <= (3 << CAMERA_FIXEDPT) &&
tz == 0 &&
ta == 0 &&
tp == 0
)
{
pCamera->TargetRequested = NO_TARGET_REQUESTED;
#if defined (_WINDOWS)
// [d11-12-96 JPC] Only do autores in Windows; it's no help in DOS and
// causes more bugs.
if( fAIAutoRes )
{
set_hires(0L, 0L);
}
#endif
return;
}
#if defined (_WINDOWS)
// [d11-12-96 JPC] Only do autores in Windows; it's no help in DOS and
// causes more bugs.
if( fAIAutoRes )
{
set_lowres(0L, 0L);
}
#endif
// Angles are in Byteans.
// Roll the camera the shortest way around the circle.
if (ta>128)
ta=ta-256;
else
if (ta<-128)
ta=ta+256;
NewPoint.dz = ((tz+((tz>0)?TargetFactor2:-TargetFactor2)) / pCamera->TargetFactor);
NewPoint.dx = ((tx+((tx>0)?TargetFactor2 << CAMERA_FIXEDPT:-TargetFactor2 << CAMERA_FIXEDPT)) / pCamera->TargetFactor);
NewPoint.dy = ((ty+((ty>0)?TargetFactor2 << CAMERA_FIXEDPT:-TargetFactor2 << CAMERA_FIXEDPT)) / pCamera->TargetFactor);
//NewPoint.dx <<= PLAYER_FIXEDPT;
//NewPoint.dy <<= PLAYER_FIXEDPT;
// If Camera's become fixed point be sure and fix these next two lines.
//TempPlayer.x = camera.x << PLAYER_FIXEDPT;
//TempPlayer.y = camera.y << PLAYER_FIXEDPT;
TempPlayer.x = camera.x;
TempPlayer.y = camera.y;
TempPlayer.z = camera.z;
TempPlayer.a = camera.a;
TempPlayer.w = CAMERA_WIDTH_WIDE; // GWP HACK numbers for the size of a camera.
TempPlayer.h = CAMERA_HEIGHT;
TempPlayer.Flying = TRUE;
TempPlayer.ThingIndex = fERROR;
TempPlayer.bump = iNOTHING;
TempPlayer.BumpIndex = fERROR;
CheckMoveSimple(&TempPlayer, &NewPoint, 0, &BumpDistance);
//NewPoint.dx >>= PLAYER_FIXEDPT;
//NewPoint.dy >>= PLAYER_FIXEDPT;
switch(TempPlayer.bump)
{
case iNOTHING:
case iSLIDE_ON_WALL:
#if defined (_STATUS)
if (!DebugCameraMove (pCamera, NewPoint))
break;
#endif
pCamera->x += NewPoint.dx;
pCamera->y += NewPoint.dy;
pCamera->z += NewPoint.dz;
break;
// [d12-09-96 JPC] In these cases, do not change x and y; move z to
// a reasonable height relative to the player.
case iWALL:
case iCEILING:
case iFLOOR:
pCamera->z = player.z + DEFAULT_CAMERA_Z;
break;
}
pCamera->a += ((ta+((ta>0)?TargetFactor2:-TargetFactor2)) / pCamera->TargetFactor);
pCamera->p += ((tp+((tp>0)?TargetFactor2:-TargetFactor2)) / pCamera->TargetFactor);
pCamera->TargetFactor = ((pCamera->TargetFactor - 5) / 2) + 5;
// Now Limit the roll angles to the range 0 -> 256
if (pCamera->a > 256)
pCamera->a -= 256;
else
if (pCamera->a < 0 )
pCamera->a += 256;
}
/* =======================================================================
Function - MoveCameraEvenly
Description - move the camera to a new point.
Returns - void
======================================================================== */
void MoveCameraEvenly(CAMERA *pCamera)
{
const LONG tx = (pCamera->LTarget.x << CAMERA_FIXEDPT) - pCamera->x;
const LONG ty = (pCamera->LTarget.y << CAMERA_FIXEDPT) - pCamera->y;
const LONG tz = pCamera->LTarget.z - pCamera->z;
LONG ta = pCamera->LTarget.a - pCamera->a;
const LONG tp = pCamera->LTarget.p - pCamera->p;
LONG Difference[4];
// Angles are in Byteans.
// Roll the camera the shortest way around the circle.
if (ta>128)
ta=ta-256;
else
if (ta<-128)
ta=ta+256;
// MOVE_CAMERA_EVENLY
Difference[0] = dist(CAMERA_INT_VAL(pCamera->x),
CAMERA_INT_VAL(pCamera->y),
pCamera->LTarget.x,
pCamera->LTarget.y); // Linear difference between the two point
Difference[1] = ABS(tz); // Height difference
Difference[2] = ABS(ta); // Angle difference
Difference[3] = ABS(tp); // Pitch difference
if( Difference[0] <= pCamera->Rate[0] &&
Difference[1] <= pCamera->Rate[1] &&
Difference[2] <= pCamera->Rate[2] &&
Difference[3] <= pCamera->Rate[3] )
{
pCamera->x = pCamera->LTarget.x << CAMERA_FIXEDPT;
pCamera->y = pCamera->LTarget.y << CAMERA_FIXEDPT;
pCamera->z = pCamera->LTarget.z;
pCamera->a = pCamera->LTarget.a;
pCamera->p = pCamera->LTarget.p;
}
else
{
LONG MaxIndex=0, i;
while(Difference[MaxIndex] <= pCamera->Rate[MaxIndex]) MaxIndex++;
for( i=MaxIndex+1; i<4; i++)
{
if((Difference[i] > pCamera->Rate[i]) &&
((Difference[MaxIndex]/pCamera->Rate[MaxIndex])<
(Difference[i]/pCamera->Rate[i])))
{
MaxIndex = i;
}
}
pCamera->x += (tx * pCamera->Rate[MaxIndex] ) / Difference[MaxIndex];
pCamera->y += (ty * pCamera->Rate[MaxIndex] ) / Difference[MaxIndex];
pCamera->z += (tz * pCamera->Rate[MaxIndex] ) / Difference[MaxIndex];
pCamera->a += (ta * pCamera->Rate[MaxIndex] ) / Difference[MaxIndex];
pCamera->p += (tp * pCamera->Rate[MaxIndex] ) / Difference[MaxIndex];
}
// Now Limit the roll angles to the range 0 -> 256
if (pCamera->a > 256)
pCamera->a -= 256;
else
if (pCamera->a < 0 )
pCamera->a += 256;
// If the camera is at the target position stop moving.
if (CAMERA_INT_VAL(pCamera->x) == pCamera->LTarget.x &&
CAMERA_INT_VAL(pCamera->y) == pCamera->LTarget.y &&
pCamera->z == pCamera->LTarget.z &&
pCamera->a == pCamera->LTarget.a &&
pCamera->p == pCamera->LTarget.p
)
{
pCamera->TargetRequested = NO_TARGET_REQUESTED;
#if defined (_WINDOWS)
// [d11-12-96 JPC] Only do autores in Windows; it's no help in DOS and
// causes more bugs.
if( fAIAutoRes )
{
set_hires(0L, 0L);
}
#endif
}
else
{
#if defined (_WINDOWS)
// [d11-12-96 JPC] Only do autores in Windows; it's no help in DOS and
// causes more bugs.
if( fAIAutoRes )
{
set_lowres(0L, 0L);
}
#endif
}
}
/* =======================================================================
Function - RotateCameraEvenly
Description - Rotate the camera Evenly about a point.
GWP - This doesn't work well if at all.
Returns - void
======================================================================== */
void RotateCameraEvenly(CAMERA *pCamera)
{
const LONG tz = pCamera->RTarget.z - pCamera->z;
const LONG tp = pCamera->RTarget.p - pCamera->p;
LONG MoveTota;
FIXED_VECTOR_3D NewPoint;
POINT MoveToPoint;
PLAYER TempPlayer;
LONG distanceToTarget;
LONG MoveToPointAngle;
LONG AngleToMovePoint;
LONG distanceToMoveToPt;
LONG BumpDistance;
LONG MaxIndex=0;
LONG i;
LONG Difference[4];
const LONG CurrentAngleToTarget = AngleFromPoint2(
pCamera->x,
pCamera->y,
pCamera->RTarget.x << CAMERA_FIXEDPT,
pCamera->RTarget.y << CAMERA_FIXEDPT,
RESOLUTION_1);
// GWP Later store the MoveToPoint & Angle in the camera RTarget struct.
// GWP when it is first specified.
// Calculate the destination point.
MoveToPoint.x = 0;
MoveToPoint.y = pCamera->RTarget.distance << CAMERA_FIXEDPT;
Rotate(&MoveToPoint, pCamera->RTarget.a);
// Translate to target coordinates.
MoveToPoint.x += pCamera->RTarget.x << CAMERA_FIXEDPT;
MoveToPoint.y += pCamera->RTarget.y << CAMERA_FIXEDPT;
distanceToMoveToPt = dist ( CAMERA_INT_VAL(pCamera->x),
CAMERA_INT_VAL(pCamera->y),
CAMERA_INT_VAL(MoveToPoint.x),
CAMERA_INT_VAL(MoveToPoint.y));
// Compute the final looking back angle.
MoveToPointAngle = AngleFromPoint2(
MoveToPoint.x,
MoveToPoint.y,
pCamera->RTarget.x << CAMERA_FIXEDPT,
pCamera->RTarget.y << CAMERA_FIXEDPT,
RESOLUTION_1);
MoveTota = MoveToPointAngle - CurrentAngleToTarget;
// Roll the camera the shortest way around the circle.
if (MoveTota>128)
MoveTota=MoveTota-256;
else
if (MoveTota<-128)
MoveTota=MoveTota+256;
AngleToMovePoint = AngleFromPoint2(pCamera->x,
pCamera->y,
MoveToPoint.x,
MoveToPoint.y,
RESOLUTION_1);
Difference[0] = distanceToMoveToPt;
Difference[1] = ABS(tz);
Difference[2] = ABS(MoveTota);