SRB2/src/r_portal.h

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// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 1993-1996 by id Software, Inc.
// Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 1999-2018 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file r_portal.h
/// \brief Software renderer portal struct, functions, linked list extern.
#ifndef __R_PORTAL__
#define __R_PORTAL__
#include "r_data.h"
#include "r_plane.h" // visplanes
/** Portal structure for the software renderer.
*/
typedef struct portal_s
{
struct portal_s *next;
// Viewport.
fixed_t viewx;
fixed_t viewy;
fixed_t viewz;
angle_t viewangle;
UINT8 pass; /**< Keeps track of the portal's recursion depth. */
INT32 clipline; /**< Optional clipline for line-based portals. */
// Clipping information.
INT32 start; /**< First horizontal pixel coordinate to draw at. */
INT32 end; /**< Last horizontal pixel coordinate to draw at. */
INT16 *ceilingclip; /**< Temporary screen top clipping array. */
INT16 *floorclip; /**< Temporary screen bottom clipping array. */
fixed_t *frontscale;/**< Temporary screen bottom clipping array. */
} portal_t;
extern portal_t* portal_base;
extern portal_t* portal_cap;
extern UINT8 portalrender;
extern line_t *portalclipline;
extern INT32 portalclipstart, portalclipend;
void Portal_InitList (void);
void Portal_Remove (portal_t* portal);
void Portal_Add2Lines (const INT32 line1, const INT32 line2, const INT32 x1, const INT32 x2);
void Portal_AddSkybox (const visplane_t* plane);
void Portal_ClipRange (portal_t* portal);
void Portal_ClipApply (const portal_t* portal);
void Portal_AddSkyboxPortals (void);
#endif