gzdoom/src/r_utility.cpp

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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
// Rendering main loop and setup functions,
// utility functions (BSP, geometry, trigonometry).
// See tables.c, too.
//
//-----------------------------------------------------------------------------
// HEADER FILES ------------------------------------------------------------
#include <stdlib.h>
#include <math.h>
#include "templates.h"
#include "doomdef.h"
#include "d_net.h"
#include "doomstat.h"
#include "m_random.h"
#include "m_bbox.h"
#include "p_local.h"
#include "r_sky.h"
#include "st_stuff.h"
#include "c_cvars.h"
#include "c_dispatch.h"
#include "v_video.h"
#include "stats.h"
#include "i_video.h"
#include "i_system.h"
#include "a_sharedglobal.h"
#include "r_data/r_translate.h"
#include "p_3dmidtex.h"
#include "r_data/r_interpolate.h"
#include "v_palette.h"
#include "po_man.h"
#include "p_effect.h"
#include "st_start.h"
#include "v_font.h"
#include "r_renderer.h"
#include "r_data/colormaps.h"
#include "farchive.h"
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
extern bool DrawFSHUD; // [RH] Defined in d_main.cpp
EXTERN_CVAR (Bool, cl_capfps)
// TYPES -------------------------------------------------------------------
struct InterpolationViewer
{
AActor *ViewActor;
int otic;
fixed_t oviewx, oviewy, oviewz;
fixed_t nviewx, nviewy, nviewz;
int oviewpitch, nviewpitch;
angle_t oviewangle, nviewangle;
};
// PRIVATE DATA DECLARATIONS -----------------------------------------------
static TArray<InterpolationViewer> PastViewers;
static FRandom pr_torchflicker ("TorchFlicker");
static FRandom pr_hom;
static bool NoInterpolateView;
// PUBLIC DATA DEFINITIONS -------------------------------------------------
CVAR (Bool, r_deathcamera, false, CVAR_ARCHIVE)
CVAR (Int, r_clearbuffer, 0, 0)
CVAR (Bool, r_drawvoxels, true, 0)
CVAR (Bool, r_drawplayersprites, true, 0) // [RH] Draw player sprites?
DCanvas *RenderTarget; // [RH] canvas to render to
int viewwindowx;
int viewwindowy;
fixed_t viewx;
fixed_t viewy;
fixed_t viewz;
int viewpitch;
extern "C"
{
int viewwidth;
int viewheight;
int centerx;
int centery;
int centerxwide;
}
int otic;
angle_t viewangle;
sector_t *viewsector;
fixed_t viewcos, viewtancos;
fixed_t viewsin, viewtansin;
AActor *camera; // [RH] camera to draw from. doesn't have to be a player
fixed_t r_TicFrac; // [RH] Fractional tic to render
DWORD r_FrameTime; // [RH] Time this frame started drawing (in ms)
bool r_NoInterpolate;
bool r_showviewer;
angle_t LocalViewAngle;
int LocalViewPitch;
bool LocalKeyboardTurner;
float LastFOV;
int WidescreenRatio;
int setblocks;
int extralight;
bool setsizeneeded;
fixed_t FocalTangent;
unsigned int R_OldBlend = ~0;
int validcount = 1; // increment every time a check is made
int FieldOfView = 2048; // Fineangles in the SCREENWIDTH wide window
FCanvasTextureInfo *FCanvasTextureInfo::List;
// CODE --------------------------------------------------------------------
static void R_Shutdown ();
//==========================================================================
//
// SlopeDiv
//
// Utility function, called by R_PointToAngle.
//
//==========================================================================
angle_t SlopeDiv (unsigned int num, unsigned den)
{
unsigned int ans;
if (den < 512)
return (ANG45 - 1); //tantoangle[SLOPERANGE]
ans = (num << 3) / (den >> 8);
return ans <= SLOPERANGE ? tantoangle[ans] : (ANG45 - 1);
}
//==========================================================================
//
// R_PointToAngle
//
// To get a global angle from cartesian coordinates, the coordinates are
// flipped until they are in the first octant of the coordinate system,
// then the y (<=x) is scaled and divided by x to get a tangent (slope)
// value which is looked up in the tantoangle[] table.
//
//==========================================================================
angle_t R_PointToAngle2 (fixed_t x1, fixed_t y1, fixed_t x, fixed_t y)
{
x -= x1;
y -= y1;
if ((x | y) == 0)
{
return 0;
}
// We need to be aware of overflows here. If the values get larger than INT_MAX/4
// this code won't work anymore.
if (x < INT_MAX/4 && x > -INT_MAX/4 && y < INT_MAX/4 && y > -INT_MAX/4)
{
if (x >= 0)
{
if (y >= 0)
{
if (x > y)
{ // octant 0
return SlopeDiv(y, x);
}
else
{ // octant 1
return ANG90 - 1 - SlopeDiv(x, y);
}
}
else // y < 0
{
y = -y;
if (x > y)
{ // octant 8
return 0 - SlopeDiv(y, x);
}
else
{ // octant 7
return ANG270 + SlopeDiv(x, y);
}
}
}
else // x < 0
{
x = -x;
if (y >= 0)
{
if (x > y)
{ // octant 3
return ANG180 - 1 - SlopeDiv(y, x);
}
else
{ // octant 2
return ANG90 + SlopeDiv(x, y);
}
}
else // y < 0
{
y = -y;
if (x > y)
{ // octant 4
return ANG180 + SlopeDiv(y, x);
}
else
{ // octant 5
return ANG270 - 1 - SlopeDiv(x, y);
}
}
}
}
else
{
// we have to use the slower but more precise floating point atan2 function here.
return xs_RoundToUInt(atan2(double(y), double(x)) * (ANGLE_180/M_PI));
}
}
//==========================================================================
//
// R_InitPointToAngle
//
//==========================================================================
void R_InitPointToAngle (void)
{
double f;
int i;
//
// slope (tangent) to angle lookup
//
for (i = 0; i <= SLOPERANGE; i++)
{
f = atan2 ((double)i, (double)SLOPERANGE) / (6.28318530718 /* 2*pi */);
tantoangle[i] = (angle_t)(0xffffffff*f);
}
}
//==========================================================================
//
// R_PointToDist2
//
// Returns the distance from (0,0) to some other point. In a
// floating point environment, we'd probably be better off using the
// Pythagorean Theorem to determine the result.
//
// killough 5/2/98: simplified
// [RH] Simplified further [sin (t + 90 deg) == cos (t)]
// Not used. Should it go away?
//
//==========================================================================
fixed_t R_PointToDist2 (fixed_t dx, fixed_t dy)
{
dx = abs (dx);
dy = abs (dy);
if ((dx | dy) == 0)
{
return 0;
}
if (dy > dx)
{
swapvalues (dx, dy);
}
return FixedDiv (dx, finecosine[tantoangle[FixedDiv (dy, dx) >> DBITS] >> ANGLETOFINESHIFT]);
}
//==========================================================================
//
// R_InitTables
//
//==========================================================================
void R_InitTables (void)
{
int i;
const double pimul = PI*2/FINEANGLES;
// viewangle tangent table
finetangent[0] = (fixed_t)(FRACUNIT*tan ((0.5-FINEANGLES/4)*pimul)+0.5);
for (i = 1; i < FINEANGLES/2; i++)
{
finetangent[i] = (fixed_t)(FRACUNIT*tan ((i-FINEANGLES/4)*pimul)+0.5);
}
// finesine table
for (i = 0; i < FINEANGLES/4; i++)
{
finesine[i] = (fixed_t)(FRACUNIT * sin (i*pimul));
}
for (i = 0; i < FINEANGLES/4; i++)
{
finesine[i+FINEANGLES/4] = finesine[FINEANGLES/4-1-i];
}
for (i = 0; i < FINEANGLES/2; i++)
{
finesine[i+FINEANGLES/2] = -finesine[i];
}
finesine[FINEANGLES/4] = FRACUNIT;
finesine[FINEANGLES*3/4] = -FRACUNIT;
memcpy (&finesine[FINEANGLES], &finesine[0], sizeof(angle_t)*FINEANGLES/4);
}
//==========================================================================
//
// R_SetFOV
//
// Changes the field of view in degrees
//
//==========================================================================
void R_SetFOV (float fov)
{
if (fov < 5.f)
fov = 5.f;
else if (fov > 170.f)
fov = 170.f;
if (fov != LastFOV)
{
LastFOV = fov;
FieldOfView = (int)(fov * (float)FINEANGLES / 360.f);
setsizeneeded = true;
}
}
//==========================================================================
//
// R_GetFOV
//
// Returns the current field of view in degrees
//
//==========================================================================
float R_GetFOV ()
{
return LastFOV;
}
//==========================================================================
//
// R_SetViewSize
//
// Do not really change anything here, because it might be in the middle
// of a refresh. The change will take effect next refresh.
//
//==========================================================================
void R_SetViewSize (int blocks)
{
setsizeneeded = true;
setblocks = blocks;
}
//==========================================================================
//
// R_SetWindow
//
//==========================================================================
void R_SetWindow (int windowSize, int fullWidth, int fullHeight, int stHeight)
{
int trueratio;
if (windowSize >= 11)
{
viewwidth = fullWidth;
freelookviewheight = viewheight = fullHeight;
}
else if (windowSize == 10)
{
viewwidth = fullWidth;
viewheight = stHeight;
freelookviewheight = fullHeight;
}
else
{
viewwidth = ((setblocks*fullWidth)/10) & (~15);
viewheight = ((setblocks*stHeight)/10)&~7;
freelookviewheight = ((setblocks*fullHeight)/10)&~7;
}
// If the screen is approximately 16:9 or 16:10, consider it widescreen.
WidescreenRatio = CheckRatio (fullWidth, fullHeight, &trueratio);
DrawFSHUD = (windowSize == 11);
// [RH] Sky height fix for screens not 200 (or 240) pixels tall
R_InitSkyMap ();
centery = viewheight/2;
centerx = viewwidth/2;
if (WidescreenRatio & 4)
{
centerxwide = centerx;
}
else
{
centerxwide = centerx * BaseRatioSizes[WidescreenRatio][3] / 48;
}
int fov = FieldOfView;
// For widescreen displays, increase the FOV so that the middle part of the
// screen that would be visible on a 4:3 display has the requested FOV.
if (centerxwide != centerx)
{ // centerxwide is what centerx would be if the display was not widescreen
fov = int(atan(double(centerx)*tan(double(fov)*M_PI/(FINEANGLES))/double(centerxwide))*(FINEANGLES)/M_PI);
if (fov > 170*FINEANGLES/360)
fov = 170*FINEANGLES/360;
}
FocalTangent = finetangent[FINEANGLES/4+fov/2];
Renderer->SetWindow(windowSize, fullWidth, fullHeight, stHeight, trueratio);
}
//==========================================================================
//
// R_ExecuteSetViewSize
//
//==========================================================================
void R_ExecuteSetViewSize ()
{
setsizeneeded = false;
V_SetBorderNeedRefresh();
R_SetWindow (setblocks, SCREENWIDTH, SCREENHEIGHT, ST_Y);
// Handle resize, e.g. smaller view windows with border and/or status bar.
viewwindowx = (screen->GetWidth() - viewwidth) >> 1;
// Same with base row offset.
viewwindowy = (viewwidth == screen->GetWidth()) ? 0 : (ST_Y - viewheight) >> 1;
}
//==========================================================================
//
// CVAR screenblocks
//
// Selects the size of the visible window
//
//==========================================================================
CUSTOM_CVAR (Int, screenblocks, 10, CVAR_ARCHIVE)
{
if (self > 12)
self = 12;
else if (self < 3)
self = 3;
else
R_SetViewSize (self);
}
//==========================================================================
//
// R_PointInSubsector
//
//==========================================================================
subsector_t *R_PointInSubsector (fixed_t x, fixed_t y)
{
node_t *node;
int side;
// single subsector is a special case
if (numnodes == 0)
return subsectors;
node = nodes + numnodes - 1;
do
{
side = R_PointOnSide (x, y, node);
node = (node_t *)node->children[side];
}
while (!((size_t)node & 1));
return (subsector_t *)((BYTE *)node - 1);
}
//==========================================================================
//
// R_Init
//
//==========================================================================
void R_Init ()
{
atterm (R_Shutdown);
StartScreen->Progress();
V_InitFonts();
StartScreen->Progress();
// Colormap init moved back to InitPalette()
//R_InitColormaps ();
//StartScreen->Progress();
R_InitPointToAngle ();
R_InitTables ();
R_InitTranslationTables ();
R_SetViewSize (screenblocks);
Renderer->Init();
}
//==========================================================================
//
// R_Shutdown
//
//==========================================================================
static void R_Shutdown ()
{
R_DeinitTranslationTables();
R_DeinitColormaps ();
FCanvasTextureInfo::EmptyList();
}
//==========================================================================
//
// R_InterpolateView
//
//==========================================================================
//CVAR (Int, tf, 0, 0)
EXTERN_CVAR (Bool, cl_noprediction)
void R_InterpolateView (player_t *player, fixed_t frac, InterpolationViewer *iview)
{
// frac = tf;
if (NoInterpolateView)
{
NoInterpolateView = false;
iview->oviewx = iview->nviewx;
iview->oviewy = iview->nviewy;
iview->oviewz = iview->nviewz;
iview->oviewpitch = iview->nviewpitch;
iview->oviewangle = iview->nviewangle;
}
viewx = iview->oviewx + FixedMul (frac, iview->nviewx - iview->oviewx);
viewy = iview->oviewy + FixedMul (frac, iview->nviewy - iview->oviewy);
viewz = iview->oviewz + FixedMul (frac, iview->nviewz - iview->oviewz);
if (player != NULL &&
player - players == consoleplayer &&
camera == player->mo &&
!demoplayback &&
iview->nviewx == camera->x &&
iview->nviewy == camera->y &&
!(player->cheats & (CF_TOTALLYFROZEN|CF_FROZEN)) &&
player->playerstate == PST_LIVE &&
player->mo->reactiontime == 0 &&
!NoInterpolateView &&
!paused &&
(!netgame || !cl_noprediction) &&
!LocalKeyboardTurner)
{
viewangle = iview->nviewangle + (LocalViewAngle & 0xFFFF0000);
fixed_t delta = player->centering ? 0 : -(signed)(LocalViewPitch & 0xFFFF0000);
viewpitch = iview->nviewpitch;
if (delta > 0)
{
// Avoid overflowing viewpitch (can happen when a netgame is stalled)
if (viewpitch + delta <= viewpitch)
{
viewpitch = player->MaxPitch;
}
else
{
viewpitch = MIN(viewpitch + delta, player->MaxPitch);
}
}
else if (delta < 0)
{
// Avoid overflowing viewpitch (can happen when a netgame is stalled)
if (viewpitch + delta >= viewpitch)
{
viewpitch = player->MinPitch;
}
else
{
viewpitch = MAX(viewpitch + delta, player->MinPitch);
}
}
}
else
{
viewpitch = iview->oviewpitch + FixedMul (frac, iview->nviewpitch - iview->oviewpitch);
viewangle = iview->oviewangle + FixedMul (frac, iview->nviewangle - iview->oviewangle);
}
// Due to interpolation this is not necessarily the same as the sector the camera is in.
viewsector = R_PointInSubsector(viewx, viewy)->sector;
}
//==========================================================================
//
// R_ResetViewInterpolation
//
//==========================================================================
void R_ResetViewInterpolation ()
{
NoInterpolateView = true;
}
//==========================================================================
//
// R_SetViewAngle
//
//==========================================================================
void R_SetViewAngle ()
{
angle_t ang = viewangle >> ANGLETOFINESHIFT;
viewsin = finesine[ang];
viewcos = finecosine[ang];
viewtansin = FixedMul (FocalTangent, viewsin);
viewtancos = FixedMul (FocalTangent, viewcos);
}
//==========================================================================
//
// FindPastViewer
//
//==========================================================================
static InterpolationViewer *FindPastViewer (AActor *actor)
{
for (unsigned int i = 0; i < PastViewers.Size(); ++i)
{
if (PastViewers[i].ViewActor == actor)
{
return &PastViewers[i];
}
}
// Not found, so make a new one
InterpolationViewer iview = { NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
iview.ViewActor = actor;
iview.otic = -1;
return &PastViewers[PastViewers.Push (iview)];
}
//==========================================================================
//
// R_FreePastViewers
//
//==========================================================================
void R_FreePastViewers ()
{
PastViewers.Clear ();
}
//==========================================================================
//
// R_ClearPastViewer
//
// If the actor changed in a non-interpolatable way, remove it.
//
//==========================================================================
void R_ClearPastViewer (AActor *actor)
{
for (unsigned int i = 0; i < PastViewers.Size(); ++i)
{
if (PastViewers[i].ViewActor == actor)
{
// Found it, so remove it.
if (i == PastViewers.Size())
{
PastViewers.Delete (i);
}
else
{
PastViewers.Pop (PastViewers[i]);
}
}
}
}
//==========================================================================
//
// R_SetupFrame
//
//==========================================================================
void R_SetupFrame (AActor *actor)
{
if (actor == NULL)
{
I_Error ("Tried to render from a NULL actor.");
}
player_t *player = actor->player;
unsigned int newblend;
InterpolationViewer *iview;
if (player != NULL && player->mo == actor)
{ // [RH] Use camera instead of viewplayer
camera = player->camera;
if (camera == NULL)
{
camera = player->camera = player->mo;
}
}
else
{
camera = actor;
}
if (camera == NULL)
{
I_Error ("You lost your body. Bad dehacked work is likely to blame.");
}
iview = FindPastViewer (camera);
int nowtic = I_GetTime (false);
if (iview->otic != -1 && nowtic > iview->otic)
{
iview->otic = nowtic;
iview->oviewx = iview->nviewx;
iview->oviewy = iview->nviewy;
iview->oviewz = iview->nviewz;
iview->oviewpitch = iview->nviewpitch;
iview->oviewangle = iview->nviewangle;
}
if (player != NULL && gamestate != GS_TITLELEVEL &&
((player->cheats & CF_CHASECAM) || (r_deathcamera && camera->health <= 0)))
{
// [RH] Use chasecam view
P_AimCamera (camera, iview->nviewx, iview->nviewy, iview->nviewz, viewsector);
r_showviewer = true;
}
else
{
iview->nviewx = camera->x;
iview->nviewy = camera->y;
iview->nviewz = camera->player ? camera->player->viewz : camera->z + camera->GetClass()->Meta.GetMetaFixed(AMETA_CameraHeight);
viewsector = camera->Sector;
r_showviewer = false;
}
iview->nviewpitch = camera->pitch;
if (camera->player != 0)
{
player = camera->player;
}
iview->nviewangle = camera->angle;
if (iview->otic == -1 || r_NoInterpolate)
{
R_ResetViewInterpolation ();
iview->otic = nowtic;
}
r_TicFrac = I_GetTimeFrac (&r_FrameTime);
if (cl_capfps || r_NoInterpolate)
{
r_TicFrac = FRACUNIT;
}
R_InterpolateView (player, r_TicFrac, iview);
#ifdef TEST_X
viewx = TEST_X;
viewy = TEST_Y;
viewz = TEST_Z;
viewangle = TEST_ANGLE;
#endif
R_SetViewAngle ();
interpolator.DoInterpolations (r_TicFrac);
// Keep the view within the sector's floor and ceiling
fixed_t theZ = viewsector->ceilingplane.ZatPoint (viewx, viewy) - 4*FRACUNIT;
if (viewz > theZ)
{
viewz = theZ;
}
theZ = viewsector->floorplane.ZatPoint (viewx, viewy) + 4*FRACUNIT;
if (viewz < theZ)
{
viewz = theZ;
}
if (!paused)
{
int intensity = DEarthquake::StaticGetQuakeIntensity (camera);
if (intensity != 0)
{
viewx += ((pr_torchflicker() % (intensity<<2))
-(intensity<<1))<<FRACBITS;
viewy += ((pr_torchflicker() % (intensity<<2))
-(intensity<<1))<<FRACBITS;
}
}
extralight = camera->player ? camera->player->extralight : 0;
// killough 3/20/98, 4/4/98: select colormap based on player status
// [RH] Can also select a blend
newblend = 0;
TArray<lightlist_t> &lightlist = viewsector->e->XFloor.lightlist;
if (lightlist.Size() > 0)
{
for(unsigned int i=0;i<lightlist.Size();i++)
{
fixed_t lightbottom;
if (i<lightlist.Size()-1)
lightbottom = lightlist[i+1].plane.ZatPoint(viewx, viewy);
else
lightbottom = viewsector->floorplane.ZatPoint(viewx, viewy);
if (lightbottom < viewz)
{
// 3d floor 'fog' is rendered as a blending value
PalEntry blendv = lightlist[i].blend;
// If no alpha is set, use 50%
if (blendv.a==0 && blendv!=0) blendv.a=128;
newblend = blendv.d;
break;
}
}
}
else
{
const sector_t *s = viewsector->GetHeightSec();
if (s != NULL)
{
newblend = viewz < s->floorplane.ZatPoint (viewx, viewy)
? s->bottommap
: viewz > s->ceilingplane.ZatPoint (viewx, viewy)
? s->topmap
: s->midmap;
if (APART(newblend) == 0 && newblend >= numfakecmaps)
newblend = 0;
}
}
// [RH] Don't override testblend unless entering a sector with a
// blend different from the previous sector's. Same goes with
// NormalLight's maps pointer.
if (R_OldBlend != newblend)
{
R_OldBlend = newblend;
if (APART(newblend))
{
BaseBlendR = RPART(newblend);
BaseBlendG = GPART(newblend);
BaseBlendB = BPART(newblend);
BaseBlendA = APART(newblend) / 255.f;
NormalLight.Maps = realcolormaps;
}
else
{
NormalLight.Maps = realcolormaps + NUMCOLORMAPS*256*newblend;
BaseBlendR = BaseBlendG = BaseBlendB = 0;
BaseBlendA = 0.f;
}
}
Renderer->CopyStackedViewParameters();
Renderer->SetupFrame(player);
validcount++;
if (RenderTarget == screen && r_clearbuffer != 0)
{
int color;
int hom = r_clearbuffer;
if (hom == 3)
{
hom = ((I_FPSTime() / 128) & 1) + 1;
}
if (hom == 1)
{
color = GPalette.BlackIndex;
}
else if (hom == 2)
{
color = GPalette.WhiteIndex;
}
else if (hom == 4)
{
color = (I_FPSTime() / 32) & 255;
}
else
{
color = pr_hom();
}
Renderer->ClearBuffer(color);
}
}
//==========================================================================
//
// FCanvasTextureInfo :: Add
//
// Assigns a camera to a canvas texture.
//
//==========================================================================
void FCanvasTextureInfo::Add (AActor *viewpoint, FTextureID picnum, int fov)
{
FCanvasTextureInfo *probe;
FCanvasTexture *texture;
if (!picnum.isValid())
{
return;
}
texture = static_cast<FCanvasTexture *>(TexMan[picnum]);
if (!texture->bHasCanvas)
{
Printf ("%s is not a valid target for a camera\n", texture->Name);
return;
}
// Is this texture already assigned to a camera?
for (probe = List; probe != NULL; probe = probe->Next)
{
if (probe->Texture == texture)
{
// Yes, change its assignment to this new camera
if (probe->Viewpoint != viewpoint || probe->FOV != fov)
{
texture->bFirstUpdate = true;
}
probe->Viewpoint = viewpoint;
probe->FOV = fov;
return;
}
}
// No, create a new assignment
probe = new FCanvasTextureInfo;
probe->Viewpoint = viewpoint;
probe->Texture = texture;
probe->PicNum = picnum;
probe->FOV = fov;
probe->Next = List;
texture->bFirstUpdate = true;
List = probe;
}
//==========================================================================
//
// FCanvasTextureInfo :: UpdateAll
//
// Updates all canvas textures that were visible in the last frame.
//
//==========================================================================
void FCanvasTextureInfo::UpdateAll ()
{
FCanvasTextureInfo *probe;
for (probe = List; probe != NULL; probe = probe->Next)
{
if (probe->Viewpoint != NULL && probe->Texture->bNeedsUpdate)
{
Renderer->RenderTextureView(probe->Texture, probe->Viewpoint, probe->FOV);
}
}
}
//==========================================================================
//
// FCanvasTextureInfo :: EmptyList
//
// Removes all camera->texture assignments.
//
//==========================================================================
void FCanvasTextureInfo::EmptyList ()
{
FCanvasTextureInfo *probe, *next;
for (probe = List; probe != NULL; probe = next)
{
next = probe->Next;
probe->Texture->Unload();
delete probe;
}
List = NULL;
}
//==========================================================================
//
// FCanvasTextureInfo :: Serialize
//
// Reads or writes the current set of mappings in an archive.
//
//==========================================================================
void FCanvasTextureInfo::Serialize (FArchive &arc)
{
if (arc.IsStoring ())
{
FCanvasTextureInfo *probe;
for (probe = List; probe != NULL; probe = probe->Next)
{
if (probe->Texture != NULL && probe->Viewpoint != NULL)
{
arc << probe->Viewpoint << probe->FOV << probe->PicNum;
}
}
AActor *nullactor = NULL;
arc << nullactor;
}
else
{
AActor *viewpoint;
int fov;
FTextureID picnum;
EmptyList ();
while (arc << viewpoint, viewpoint != NULL)
{
arc << fov << picnum;
Add (viewpoint, picnum, fov);
}
}
}
//==========================================================================
//
// FCanvasTextureInfo :: Mark
//
// Marks all viewpoints in the list for the collector.
//
//==========================================================================
void FCanvasTextureInfo::Mark()
{
for (FCanvasTextureInfo *probe = List; probe != NULL; probe = probe->Next)
{
GC::Mark(probe->Viewpoint);
}
}