mirror of
https://github.com/id-Software/DOOM.git
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The DOOM sources as originally released on December 23, 1997
This commit is contained in:
Travis Bradshaw
989
linuxdoom-1.10/r_things.c
Normal file
989
linuxdoom-1.10/r_things.c
Normal file
@@ -0,0 +1,989 @@
|
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// Emacs style mode select -*- C++ -*-
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//-----------------------------------------------------------------------------
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//
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// $Id:$
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//
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// Copyright (C) 1993-1996 by id Software, Inc.
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//
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// This source is available for distribution and/or modification
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// only under the terms of the DOOM Source Code License as
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// published by id Software. All rights reserved.
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//
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// The source is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
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// for more details.
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//
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// $Log:$
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//
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// DESCRIPTION:
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// Refresh of things, i.e. objects represented by sprites.
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//
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//-----------------------------------------------------------------------------
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static const char
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rcsid[] = "$Id: r_things.c,v 1.5 1997/02/03 16:47:56 b1 Exp $";
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#include <stdio.h>
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#include <stdlib.h>
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#include "doomdef.h"
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#include "m_swap.h"
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#include "i_system.h"
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#include "z_zone.h"
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#include "w_wad.h"
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#include "r_local.h"
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#include "doomstat.h"
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#define MINZ (FRACUNIT*4)
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#define BASEYCENTER 100
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//void R_DrawColumn (void);
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//void R_DrawFuzzColumn (void);
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typedef struct
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{
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int x1;
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int x2;
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int column;
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int topclip;
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int bottomclip;
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} maskdraw_t;
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//
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// Sprite rotation 0 is facing the viewer,
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// rotation 1 is one angle turn CLOCKWISE around the axis.
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// This is not the same as the angle,
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// which increases counter clockwise (protractor).
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// There was a lot of stuff grabbed wrong, so I changed it...
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//
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fixed_t pspritescale;
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fixed_t pspriteiscale;
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lighttable_t** spritelights;
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// constant arrays
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// used for psprite clipping and initializing clipping
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short negonearray[SCREENWIDTH];
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short screenheightarray[SCREENWIDTH];
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//
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// INITIALIZATION FUNCTIONS
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//
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// variables used to look up
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// and range check thing_t sprites patches
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spritedef_t* sprites;
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int numsprites;
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spriteframe_t sprtemp[29];
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int maxframe;
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char* spritename;
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//
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// R_InstallSpriteLump
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// Local function for R_InitSprites.
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//
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void
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R_InstallSpriteLump
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( int lump,
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unsigned frame,
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unsigned rotation,
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boolean flipped )
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{
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int r;
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if (frame >= 29 || rotation > 8)
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I_Error("R_InstallSpriteLump: "
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"Bad frame characters in lump %i", lump);
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if ((int)frame > maxframe)
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maxframe = frame;
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if (rotation == 0)
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{
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// the lump should be used for all rotations
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if (sprtemp[frame].rotate == false)
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I_Error ("R_InitSprites: Sprite %s frame %c has "
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"multip rot=0 lump", spritename, 'A'+frame);
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if (sprtemp[frame].rotate == true)
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I_Error ("R_InitSprites: Sprite %s frame %c has rotations "
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"and a rot=0 lump", spritename, 'A'+frame);
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sprtemp[frame].rotate = false;
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for (r=0 ; r<8 ; r++)
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{
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sprtemp[frame].lump[r] = lump - firstspritelump;
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||||
sprtemp[frame].flip[r] = (byte)flipped;
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}
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return;
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}
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// the lump is only used for one rotation
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if (sprtemp[frame].rotate == false)
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I_Error ("R_InitSprites: Sprite %s frame %c has rotations "
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"and a rot=0 lump", spritename, 'A'+frame);
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sprtemp[frame].rotate = true;
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// make 0 based
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rotation--;
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if (sprtemp[frame].lump[rotation] != -1)
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I_Error ("R_InitSprites: Sprite %s : %c : %c "
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"has two lumps mapped to it",
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spritename, 'A'+frame, '1'+rotation);
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sprtemp[frame].lump[rotation] = lump - firstspritelump;
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sprtemp[frame].flip[rotation] = (byte)flipped;
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}
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//
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// R_InitSpriteDefs
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// Pass a null terminated list of sprite names
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// (4 chars exactly) to be used.
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// Builds the sprite rotation matrixes to account
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// for horizontally flipped sprites.
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// Will report an error if the lumps are inconsistant.
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// Only called at startup.
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//
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// Sprite lump names are 4 characters for the actor,
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// a letter for the frame, and a number for the rotation.
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// A sprite that is flippable will have an additional
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// letter/number appended.
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// The rotation character can be 0 to signify no rotations.
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//
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void R_InitSpriteDefs (char** namelist)
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{
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char** check;
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int i;
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int l;
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int intname;
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int frame;
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int rotation;
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int start;
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int end;
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int patched;
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// count the number of sprite names
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check = namelist;
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while (*check != NULL)
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check++;
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numsprites = check-namelist;
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if (!numsprites)
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return;
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sprites = Z_Malloc(numsprites *sizeof(*sprites), PU_STATIC, NULL);
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start = firstspritelump-1;
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end = lastspritelump+1;
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// scan all the lump names for each of the names,
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||||
// noting the highest frame letter.
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||||
// Just compare 4 characters as ints
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for (i=0 ; i<numsprites ; i++)
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||||
{
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spritename = namelist[i];
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memset (sprtemp,-1, sizeof(sprtemp));
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maxframe = -1;
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intname = *(int *)namelist[i];
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// scan the lumps,
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// filling in the frames for whatever is found
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for (l=start+1 ; l<end ; l++)
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{
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||||
if (*(int *)lumpinfo[l].name == intname)
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||||
{
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||||
frame = lumpinfo[l].name[4] - 'A';
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||||
rotation = lumpinfo[l].name[5] - '0';
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||||
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if (modifiedgame)
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patched = W_GetNumForName (lumpinfo[l].name);
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else
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patched = l;
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R_InstallSpriteLump (patched, frame, rotation, false);
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if (lumpinfo[l].name[6])
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{
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frame = lumpinfo[l].name[6] - 'A';
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rotation = lumpinfo[l].name[7] - '0';
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R_InstallSpriteLump (l, frame, rotation, true);
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||||
}
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||||
}
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||||
}
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// check the frames that were found for completeness
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if (maxframe == -1)
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{
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sprites[i].numframes = 0;
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continue;
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}
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maxframe++;
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for (frame = 0 ; frame < maxframe ; frame++)
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{
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switch ((int)sprtemp[frame].rotate)
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{
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case -1:
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// no rotations were found for that frame at all
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I_Error ("R_InitSprites: No patches found "
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"for %s frame %c", namelist[i], frame+'A');
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break;
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case 0:
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// only the first rotation is needed
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break;
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case 1:
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// must have all 8 frames
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for (rotation=0 ; rotation<8 ; rotation++)
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if (sprtemp[frame].lump[rotation] == -1)
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I_Error ("R_InitSprites: Sprite %s frame %c "
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"is missing rotations",
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namelist[i], frame+'A');
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break;
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||||
}
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||||
}
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||||
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||||
// allocate space for the frames present and copy sprtemp to it
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sprites[i].numframes = maxframe;
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sprites[i].spriteframes =
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Z_Malloc (maxframe * sizeof(spriteframe_t), PU_STATIC, NULL);
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||||
memcpy (sprites[i].spriteframes, sprtemp, maxframe*sizeof(spriteframe_t));
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}
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||||
}
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||||
//
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// GAME FUNCTIONS
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//
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vissprite_t vissprites[MAXVISSPRITES];
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vissprite_t* vissprite_p;
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int newvissprite;
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//
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// R_InitSprites
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// Called at program start.
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||||
//
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void R_InitSprites (char** namelist)
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{
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int i;
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for (i=0 ; i<SCREENWIDTH ; i++)
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{
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negonearray[i] = -1;
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}
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R_InitSpriteDefs (namelist);
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}
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//
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// R_ClearSprites
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// Called at frame start.
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//
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||||
void R_ClearSprites (void)
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{
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vissprite_p = vissprites;
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}
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//
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// R_NewVisSprite
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//
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vissprite_t overflowsprite;
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vissprite_t* R_NewVisSprite (void)
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{
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||||
if (vissprite_p == &vissprites[MAXVISSPRITES])
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return &overflowsprite;
|
||||
|
||||
vissprite_p++;
|
||||
return vissprite_p-1;
|
||||
}
|
||||
|
||||
|
||||
|
||||
//
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// R_DrawMaskedColumn
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// Used for sprites and masked mid textures.
|
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// Masked means: partly transparent, i.e. stored
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// in posts/runs of opaque pixels.
|
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//
|
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short* mfloorclip;
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short* mceilingclip;
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|
||||
fixed_t spryscale;
|
||||
fixed_t sprtopscreen;
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||||
|
||||
void R_DrawMaskedColumn (column_t* column)
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||||
{
|
||||
int topscreen;
|
||||
int bottomscreen;
|
||||
fixed_t basetexturemid;
|
||||
|
||||
basetexturemid = dc_texturemid;
|
||||
|
||||
for ( ; column->topdelta != 0xff ; )
|
||||
{
|
||||
// calculate unclipped screen coordinates
|
||||
// for post
|
||||
topscreen = sprtopscreen + spryscale*column->topdelta;
|
||||
bottomscreen = topscreen + spryscale*column->length;
|
||||
|
||||
dc_yl = (topscreen+FRACUNIT-1)>>FRACBITS;
|
||||
dc_yh = (bottomscreen-1)>>FRACBITS;
|
||||
|
||||
if (dc_yh >= mfloorclip[dc_x])
|
||||
dc_yh = mfloorclip[dc_x]-1;
|
||||
if (dc_yl <= mceilingclip[dc_x])
|
||||
dc_yl = mceilingclip[dc_x]+1;
|
||||
|
||||
if (dc_yl <= dc_yh)
|
||||
{
|
||||
dc_source = (byte *)column + 3;
|
||||
dc_texturemid = basetexturemid - (column->topdelta<<FRACBITS);
|
||||
// dc_source = (byte *)column + 3 - column->topdelta;
|
||||
|
||||
// Drawn by either R_DrawColumn
|
||||
// or (SHADOW) R_DrawFuzzColumn.
|
||||
colfunc ();
|
||||
}
|
||||
column = (column_t *)( (byte *)column + column->length + 4);
|
||||
}
|
||||
|
||||
dc_texturemid = basetexturemid;
|
||||
}
|
||||
|
||||
|
||||
|
||||
//
|
||||
// R_DrawVisSprite
|
||||
// mfloorclip and mceilingclip should also be set.
|
||||
//
|
||||
void
|
||||
R_DrawVisSprite
|
||||
( vissprite_t* vis,
|
||||
int x1,
|
||||
int x2 )
|
||||
{
|
||||
column_t* column;
|
||||
int texturecolumn;
|
||||
fixed_t frac;
|
||||
patch_t* patch;
|
||||
|
||||
|
||||
patch = W_CacheLumpNum (vis->patch+firstspritelump, PU_CACHE);
|
||||
|
||||
dc_colormap = vis->colormap;
|
||||
|
||||
if (!dc_colormap)
|
||||
{
|
||||
// NULL colormap = shadow draw
|
||||
colfunc = fuzzcolfunc;
|
||||
}
|
||||
else if (vis->mobjflags & MF_TRANSLATION)
|
||||
{
|
||||
colfunc = R_DrawTranslatedColumn;
|
||||
dc_translation = translationtables - 256 +
|
||||
( (vis->mobjflags & MF_TRANSLATION) >> (MF_TRANSSHIFT-8) );
|
||||
}
|
||||
|
||||
dc_iscale = abs(vis->xiscale)>>detailshift;
|
||||
dc_texturemid = vis->texturemid;
|
||||
frac = vis->startfrac;
|
||||
spryscale = vis->scale;
|
||||
sprtopscreen = centeryfrac - FixedMul(dc_texturemid,spryscale);
|
||||
|
||||
for (dc_x=vis->x1 ; dc_x<=vis->x2 ; dc_x++, frac += vis->xiscale)
|
||||
{
|
||||
texturecolumn = frac>>FRACBITS;
|
||||
#ifdef RANGECHECK
|
||||
if (texturecolumn < 0 || texturecolumn >= SHORT(patch->width))
|
||||
I_Error ("R_DrawSpriteRange: bad texturecolumn");
|
||||
#endif
|
||||
column = (column_t *) ((byte *)patch +
|
||||
LONG(patch->columnofs[texturecolumn]));
|
||||
R_DrawMaskedColumn (column);
|
||||
}
|
||||
|
||||
colfunc = basecolfunc;
|
||||
}
|
||||
|
||||
|
||||
|
||||
//
|
||||
// R_ProjectSprite
|
||||
// Generates a vissprite for a thing
|
||||
// if it might be visible.
|
||||
//
|
||||
void R_ProjectSprite (mobj_t* thing)
|
||||
{
|
||||
fixed_t tr_x;
|
||||
fixed_t tr_y;
|
||||
|
||||
fixed_t gxt;
|
||||
fixed_t gyt;
|
||||
|
||||
fixed_t tx;
|
||||
fixed_t tz;
|
||||
|
||||
fixed_t xscale;
|
||||
|
||||
int x1;
|
||||
int x2;
|
||||
|
||||
spritedef_t* sprdef;
|
||||
spriteframe_t* sprframe;
|
||||
int lump;
|
||||
|
||||
unsigned rot;
|
||||
boolean flip;
|
||||
|
||||
int index;
|
||||
|
||||
vissprite_t* vis;
|
||||
|
||||
angle_t ang;
|
||||
fixed_t iscale;
|
||||
|
||||
// transform the origin point
|
||||
tr_x = thing->x - viewx;
|
||||
tr_y = thing->y - viewy;
|
||||
|
||||
gxt = FixedMul(tr_x,viewcos);
|
||||
gyt = -FixedMul(tr_y,viewsin);
|
||||
|
||||
tz = gxt-gyt;
|
||||
|
||||
// thing is behind view plane?
|
||||
if (tz < MINZ)
|
||||
return;
|
||||
|
||||
xscale = FixedDiv(projection, tz);
|
||||
|
||||
gxt = -FixedMul(tr_x,viewsin);
|
||||
gyt = FixedMul(tr_y,viewcos);
|
||||
tx = -(gyt+gxt);
|
||||
|
||||
// too far off the side?
|
||||
if (abs(tx)>(tz<<2))
|
||||
return;
|
||||
|
||||
// decide which patch to use for sprite relative to player
|
||||
#ifdef RANGECHECK
|
||||
if ((unsigned)thing->sprite >= numsprites)
|
||||
I_Error ("R_ProjectSprite: invalid sprite number %i ",
|
||||
thing->sprite);
|
||||
#endif
|
||||
sprdef = &sprites[thing->sprite];
|
||||
#ifdef RANGECHECK
|
||||
if ( (thing->frame&FF_FRAMEMASK) >= sprdef->numframes )
|
||||
I_Error ("R_ProjectSprite: invalid sprite frame %i : %i ",
|
||||
thing->sprite, thing->frame);
|
||||
#endif
|
||||
sprframe = &sprdef->spriteframes[ thing->frame & FF_FRAMEMASK];
|
||||
|
||||
if (sprframe->rotate)
|
||||
{
|
||||
// choose a different rotation based on player view
|
||||
ang = R_PointToAngle (thing->x, thing->y);
|
||||
rot = (ang-thing->angle+(unsigned)(ANG45/2)*9)>>29;
|
||||
lump = sprframe->lump[rot];
|
||||
flip = (boolean)sprframe->flip[rot];
|
||||
}
|
||||
else
|
||||
{
|
||||
// use single rotation for all views
|
||||
lump = sprframe->lump[0];
|
||||
flip = (boolean)sprframe->flip[0];
|
||||
}
|
||||
|
||||
// calculate edges of the shape
|
||||
tx -= spriteoffset[lump];
|
||||
x1 = (centerxfrac + FixedMul (tx,xscale) ) >>FRACBITS;
|
||||
|
||||
// off the right side?
|
||||
if (x1 > viewwidth)
|
||||
return;
|
||||
|
||||
tx += spritewidth[lump];
|
||||
x2 = ((centerxfrac + FixedMul (tx,xscale) ) >>FRACBITS) - 1;
|
||||
|
||||
// off the left side
|
||||
if (x2 < 0)
|
||||
return;
|
||||
|
||||
// store information in a vissprite
|
||||
vis = R_NewVisSprite ();
|
||||
vis->mobjflags = thing->flags;
|
||||
vis->scale = xscale<<detailshift;
|
||||
vis->gx = thing->x;
|
||||
vis->gy = thing->y;
|
||||
vis->gz = thing->z;
|
||||
vis->gzt = thing->z + spritetopoffset[lump];
|
||||
vis->texturemid = vis->gzt - viewz;
|
||||
vis->x1 = x1 < 0 ? 0 : x1;
|
||||
vis->x2 = x2 >= viewwidth ? viewwidth-1 : x2;
|
||||
iscale = FixedDiv (FRACUNIT, xscale);
|
||||
|
||||
if (flip)
|
||||
{
|
||||
vis->startfrac = spritewidth[lump]-1;
|
||||
vis->xiscale = -iscale;
|
||||
}
|
||||
else
|
||||
{
|
||||
vis->startfrac = 0;
|
||||
vis->xiscale = iscale;
|
||||
}
|
||||
|
||||
if (vis->x1 > x1)
|
||||
vis->startfrac += vis->xiscale*(vis->x1-x1);
|
||||
vis->patch = lump;
|
||||
|
||||
// get light level
|
||||
if (thing->flags & MF_SHADOW)
|
||||
{
|
||||
// shadow draw
|
||||
vis->colormap = NULL;
|
||||
}
|
||||
else if (fixedcolormap)
|
||||
{
|
||||
// fixed map
|
||||
vis->colormap = fixedcolormap;
|
||||
}
|
||||
else if (thing->frame & FF_FULLBRIGHT)
|
||||
{
|
||||
// full bright
|
||||
vis->colormap = colormaps;
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
// diminished light
|
||||
index = xscale>>(LIGHTSCALESHIFT-detailshift);
|
||||
|
||||
if (index >= MAXLIGHTSCALE)
|
||||
index = MAXLIGHTSCALE-1;
|
||||
|
||||
vis->colormap = spritelights[index];
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
//
|
||||
// R_AddSprites
|
||||
// During BSP traversal, this adds sprites by sector.
|
||||
//
|
||||
void R_AddSprites (sector_t* sec)
|
||||
{
|
||||
mobj_t* thing;
|
||||
int lightnum;
|
||||
|
||||
// BSP is traversed by subsector.
|
||||
// A sector might have been split into several
|
||||
// subsectors during BSP building.
|
||||
// Thus we check whether its already added.
|
||||
if (sec->validcount == validcount)
|
||||
return;
|
||||
|
||||
// Well, now it will be done.
|
||||
sec->validcount = validcount;
|
||||
|
||||
lightnum = (sec->lightlevel >> LIGHTSEGSHIFT)+extralight;
|
||||
|
||||
if (lightnum < 0)
|
||||
spritelights = scalelight[0];
|
||||
else if (lightnum >= LIGHTLEVELS)
|
||||
spritelights = scalelight[LIGHTLEVELS-1];
|
||||
else
|
||||
spritelights = scalelight[lightnum];
|
||||
|
||||
// Handle all things in sector.
|
||||
for (thing = sec->thinglist ; thing ; thing = thing->snext)
|
||||
R_ProjectSprite (thing);
|
||||
}
|
||||
|
||||
|
||||
//
|
||||
// R_DrawPSprite
|
||||
//
|
||||
void R_DrawPSprite (pspdef_t* psp)
|
||||
{
|
||||
fixed_t tx;
|
||||
int x1;
|
||||
int x2;
|
||||
spritedef_t* sprdef;
|
||||
spriteframe_t* sprframe;
|
||||
int lump;
|
||||
boolean flip;
|
||||
vissprite_t* vis;
|
||||
vissprite_t avis;
|
||||
|
||||
// decide which patch to use
|
||||
#ifdef RANGECHECK
|
||||
if ( (unsigned)psp->state->sprite >= numsprites)
|
||||
I_Error ("R_ProjectSprite: invalid sprite number %i ",
|
||||
psp->state->sprite);
|
||||
#endif
|
||||
sprdef = &sprites[psp->state->sprite];
|
||||
#ifdef RANGECHECK
|
||||
if ( (psp->state->frame & FF_FRAMEMASK) >= sprdef->numframes)
|
||||
I_Error ("R_ProjectSprite: invalid sprite frame %i : %i ",
|
||||
psp->state->sprite, psp->state->frame);
|
||||
#endif
|
||||
sprframe = &sprdef->spriteframes[ psp->state->frame & FF_FRAMEMASK ];
|
||||
|
||||
lump = sprframe->lump[0];
|
||||
flip = (boolean)sprframe->flip[0];
|
||||
|
||||
// calculate edges of the shape
|
||||
tx = psp->sx-160*FRACUNIT;
|
||||
|
||||
tx -= spriteoffset[lump];
|
||||
x1 = (centerxfrac + FixedMul (tx,pspritescale) ) >>FRACBITS;
|
||||
|
||||
// off the right side
|
||||
if (x1 > viewwidth)
|
||||
return;
|
||||
|
||||
tx += spritewidth[lump];
|
||||
x2 = ((centerxfrac + FixedMul (tx, pspritescale) ) >>FRACBITS) - 1;
|
||||
|
||||
// off the left side
|
||||
if (x2 < 0)
|
||||
return;
|
||||
|
||||
// store information in a vissprite
|
||||
vis = &avis;
|
||||
vis->mobjflags = 0;
|
||||
vis->texturemid = (BASEYCENTER<<FRACBITS)+FRACUNIT/2-(psp->sy-spritetopoffset[lump]);
|
||||
vis->x1 = x1 < 0 ? 0 : x1;
|
||||
vis->x2 = x2 >= viewwidth ? viewwidth-1 : x2;
|
||||
vis->scale = pspritescale<<detailshift;
|
||||
|
||||
if (flip)
|
||||
{
|
||||
vis->xiscale = -pspriteiscale;
|
||||
vis->startfrac = spritewidth[lump]-1;
|
||||
}
|
||||
else
|
||||
{
|
||||
vis->xiscale = pspriteiscale;
|
||||
vis->startfrac = 0;
|
||||
}
|
||||
|
||||
if (vis->x1 > x1)
|
||||
vis->startfrac += vis->xiscale*(vis->x1-x1);
|
||||
|
||||
vis->patch = lump;
|
||||
|
||||
if (viewplayer->powers[pw_invisibility] > 4*32
|
||||
|| viewplayer->powers[pw_invisibility] & 8)
|
||||
{
|
||||
// shadow draw
|
||||
vis->colormap = NULL;
|
||||
}
|
||||
else if (fixedcolormap)
|
||||
{
|
||||
// fixed color
|
||||
vis->colormap = fixedcolormap;
|
||||
}
|
||||
else if (psp->state->frame & FF_FULLBRIGHT)
|
||||
{
|
||||
// full bright
|
||||
vis->colormap = colormaps;
|
||||
}
|
||||
else
|
||||
{
|
||||
// local light
|
||||
vis->colormap = spritelights[MAXLIGHTSCALE-1];
|
||||
}
|
||||
|
||||
R_DrawVisSprite (vis, vis->x1, vis->x2);
|
||||
}
|
||||
|
||||
|
||||
|
||||
//
|
||||
// R_DrawPlayerSprites
|
||||
//
|
||||
void R_DrawPlayerSprites (void)
|
||||
{
|
||||
int i;
|
||||
int lightnum;
|
||||
pspdef_t* psp;
|
||||
|
||||
// get light level
|
||||
lightnum =
|
||||
(viewplayer->mo->subsector->sector->lightlevel >> LIGHTSEGSHIFT)
|
||||
+extralight;
|
||||
|
||||
if (lightnum < 0)
|
||||
spritelights = scalelight[0];
|
||||
else if (lightnum >= LIGHTLEVELS)
|
||||
spritelights = scalelight[LIGHTLEVELS-1];
|
||||
else
|
||||
spritelights = scalelight[lightnum];
|
||||
|
||||
// clip to screen bounds
|
||||
mfloorclip = screenheightarray;
|
||||
mceilingclip = negonearray;
|
||||
|
||||
// add all active psprites
|
||||
for (i=0, psp=viewplayer->psprites;
|
||||
i<NUMPSPRITES;
|
||||
i++,psp++)
|
||||
{
|
||||
if (psp->state)
|
||||
R_DrawPSprite (psp);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
//
|
||||
// R_SortVisSprites
|
||||
//
|
||||
vissprite_t vsprsortedhead;
|
||||
|
||||
|
||||
void R_SortVisSprites (void)
|
||||
{
|
||||
int i;
|
||||
int count;
|
||||
vissprite_t* ds;
|
||||
vissprite_t* best;
|
||||
vissprite_t unsorted;
|
||||
fixed_t bestscale;
|
||||
|
||||
count = vissprite_p - vissprites;
|
||||
|
||||
unsorted.next = unsorted.prev = &unsorted;
|
||||
|
||||
if (!count)
|
||||
return;
|
||||
|
||||
for (ds=vissprites ; ds<vissprite_p ; ds++)
|
||||
{
|
||||
ds->next = ds+1;
|
||||
ds->prev = ds-1;
|
||||
}
|
||||
|
||||
vissprites[0].prev = &unsorted;
|
||||
unsorted.next = &vissprites[0];
|
||||
(vissprite_p-1)->next = &unsorted;
|
||||
unsorted.prev = vissprite_p-1;
|
||||
|
||||
// pull the vissprites out by scale
|
||||
//best = 0; // shut up the compiler warning
|
||||
vsprsortedhead.next = vsprsortedhead.prev = &vsprsortedhead;
|
||||
for (i=0 ; i<count ; i++)
|
||||
{
|
||||
bestscale = MAXINT;
|
||||
for (ds=unsorted.next ; ds!= &unsorted ; ds=ds->next)
|
||||
{
|
||||
if (ds->scale < bestscale)
|
||||
{
|
||||
bestscale = ds->scale;
|
||||
best = ds;
|
||||
}
|
||||
}
|
||||
best->next->prev = best->prev;
|
||||
best->prev->next = best->next;
|
||||
best->next = &vsprsortedhead;
|
||||
best->prev = vsprsortedhead.prev;
|
||||
vsprsortedhead.prev->next = best;
|
||||
vsprsortedhead.prev = best;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
//
|
||||
// R_DrawSprite
|
||||
//
|
||||
void R_DrawSprite (vissprite_t* spr)
|
||||
{
|
||||
drawseg_t* ds;
|
||||
short clipbot[SCREENWIDTH];
|
||||
short cliptop[SCREENWIDTH];
|
||||
int x;
|
||||
int r1;
|
||||
int r2;
|
||||
fixed_t scale;
|
||||
fixed_t lowscale;
|
||||
int silhouette;
|
||||
|
||||
for (x = spr->x1 ; x<=spr->x2 ; x++)
|
||||
clipbot[x] = cliptop[x] = -2;
|
||||
|
||||
// Scan drawsegs from end to start for obscuring segs.
|
||||
// The first drawseg that has a greater scale
|
||||
// is the clip seg.
|
||||
for (ds=ds_p-1 ; ds >= drawsegs ; ds--)
|
||||
{
|
||||
// determine if the drawseg obscures the sprite
|
||||
if (ds->x1 > spr->x2
|
||||
|| ds->x2 < spr->x1
|
||||
|| (!ds->silhouette
|
||||
&& !ds->maskedtexturecol) )
|
||||
{
|
||||
// does not cover sprite
|
||||
continue;
|
||||
}
|
||||
|
||||
r1 = ds->x1 < spr->x1 ? spr->x1 : ds->x1;
|
||||
r2 = ds->x2 > spr->x2 ? spr->x2 : ds->x2;
|
||||
|
||||
if (ds->scale1 > ds->scale2)
|
||||
{
|
||||
lowscale = ds->scale2;
|
||||
scale = ds->scale1;
|
||||
}
|
||||
else
|
||||
{
|
||||
lowscale = ds->scale1;
|
||||
scale = ds->scale2;
|
||||
}
|
||||
|
||||
if (scale < spr->scale
|
||||
|| ( lowscale < spr->scale
|
||||
&& !R_PointOnSegSide (spr->gx, spr->gy, ds->curline) ) )
|
||||
{
|
||||
// masked mid texture?
|
||||
if (ds->maskedtexturecol)
|
||||
R_RenderMaskedSegRange (ds, r1, r2);
|
||||
// seg is behind sprite
|
||||
continue;
|
||||
}
|
||||
|
||||
|
||||
// clip this piece of the sprite
|
||||
silhouette = ds->silhouette;
|
||||
|
||||
if (spr->gz >= ds->bsilheight)
|
||||
silhouette &= ~SIL_BOTTOM;
|
||||
|
||||
if (spr->gzt <= ds->tsilheight)
|
||||
silhouette &= ~SIL_TOP;
|
||||
|
||||
if (silhouette == 1)
|
||||
{
|
||||
// bottom sil
|
||||
for (x=r1 ; x<=r2 ; x++)
|
||||
if (clipbot[x] == -2)
|
||||
clipbot[x] = ds->sprbottomclip[x];
|
||||
}
|
||||
else if (silhouette == 2)
|
||||
{
|
||||
// top sil
|
||||
for (x=r1 ; x<=r2 ; x++)
|
||||
if (cliptop[x] == -2)
|
||||
cliptop[x] = ds->sprtopclip[x];
|
||||
}
|
||||
else if (silhouette == 3)
|
||||
{
|
||||
// both
|
||||
for (x=r1 ; x<=r2 ; x++)
|
||||
{
|
||||
if (clipbot[x] == -2)
|
||||
clipbot[x] = ds->sprbottomclip[x];
|
||||
if (cliptop[x] == -2)
|
||||
cliptop[x] = ds->sprtopclip[x];
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// all clipping has been performed, so draw the sprite
|
||||
|
||||
// check for unclipped columns
|
||||
for (x = spr->x1 ; x<=spr->x2 ; x++)
|
||||
{
|
||||
if (clipbot[x] == -2)
|
||||
clipbot[x] = viewheight;
|
||||
|
||||
if (cliptop[x] == -2)
|
||||
cliptop[x] = -1;
|
||||
}
|
||||
|
||||
mfloorclip = clipbot;
|
||||
mceilingclip = cliptop;
|
||||
R_DrawVisSprite (spr, spr->x1, spr->x2);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
//
|
||||
// R_DrawMasked
|
||||
//
|
||||
void R_DrawMasked (void)
|
||||
{
|
||||
vissprite_t* spr;
|
||||
drawseg_t* ds;
|
||||
|
||||
R_SortVisSprites ();
|
||||
|
||||
if (vissprite_p > vissprites)
|
||||
{
|
||||
// draw all vissprites back to front
|
||||
for (spr = vsprsortedhead.next ;
|
||||
spr != &vsprsortedhead ;
|
||||
spr=spr->next)
|
||||
{
|
||||
|
||||
R_DrawSprite (spr);
|
||||
}
|
||||
}
|
||||
|
||||
// render any remaining masked mid textures
|
||||
for (ds=ds_p-1 ; ds >= drawsegs ; ds--)
|
||||
if (ds->maskedtexturecol)
|
||||
R_RenderMaskedSegRange (ds, ds->x1, ds->x2);
|
||||
|
||||
// draw the psprites on top of everything
|
||||
// but does not draw on side views
|
||||
if (!viewangleoffset)
|
||||
R_DrawPlayerSprites ();
|
||||
}
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user