dxx-rebirth/common/3d/clipper.h

/*
 * This file is part of the DXX-Rebirth project <https://www.dxx-rebirth.com/>.
 * It is copyright by its individual contributors, as recorded in the
 * project's Git history.  See COPYING.txt at the top level for license
 * terms and a link to the Git history.
 */
/*
 * 
 * Header for clipper.c
 * 
 */

#pragma once

#ifdef __cplusplus
#include "dxxsconf.h"
#include <cstdint>

struct g3s_codes;
struct g3s_point;

#if !DXX_USE_OGL
#include "dsx-ns.h"
#include "3d.h"
#include "globvars.h"
#include <array>

namespace dcx {

struct polygon_clip_points : std::array<g3s_point *, MAX_POINTS_IN_POLY> {};
struct temporary_points_t
{
	uint_fast32_t free_point_num;
	std::array<g3s_point, MAX_POINTS_IN_POLY> temp_points;
	std::array<g3s_point *, MAX_POINTS_IN_POLY> free_points;
	temporary_points_t();
	void free_temp_point(g3s_point &cp);
};

const polygon_clip_points &clip_polygon(polygon_clip_points &src,polygon_clip_points &dest,int *nv,g3s_codes *cc,temporary_points_t &);
void clip_line(g3s_point *&p0, g3s_point *&p1, clipping_code codes_or, temporary_points_t &);

}
#endif

#endif
initial import 2006-03-20 17:12:09 +00:00			`/*`
Switch most in-tree http:// links to https:// For each link given as http://, verify that the site is accessible over https:// and, if so, switch to it. These domains were converted: * llvm.org * clang.llvm.org * en.cppreference.com * www.dxx-rebirth.com * www.libsdl.org * www.scons.org 2018-09-02 00:57:29 +00:00			`* This file is part of the DXX-Rebirth project <https://www.dxx-rebirth.com/>.`
Removed PARALLAX banner from source files that were not released by PARALLAX; most importantly C source code translated from Assembler and args.cpp which was rewritten from scratch 2014-06-12 08:41:03 +00:00			`* It is copyright by its individual contributors, as recorded in the`
			`* project's Git history. See COPYING.txt at the top level for license`
			`* terms and a link to the Git history.`
			`*/`
initial import 2006-03-20 17:12:09 +00:00			`/*`
			`*`
			`* Header for clipper.c`
			`*`
			`*/`

Reduce includes in clipper.h 2014-12-14 05:23:00 +00:00			`#pragma once`
Make headers freestanding 2013-10-26 03:40:50 +00:00
Move common/3d/clipper.c -> common/3d/clipper.cpp 2012-11-11 22:12:51 +00:00			`#ifdef __cplusplus`
Fix various check_header_includes=1 failures 2016-12-05 00:26:11 +00:00			`#include "dxxsconf.h"`
Reduce includes in clipper.h 2014-12-14 05:23:00 +00:00			`#include <cstdint>`
Move common/3d/clipper.c -> common/3d/clipper.cpp 2012-11-11 22:12:51 +00:00
Make headers freestanding 2013-10-26 03:40:50 +00:00			`struct g3s_codes;`
			`struct g3s_point;`

Move OGL to dxxsconf.h; rename to DXX_USE_OGL Rename symbol OGL to DXX_USE_OGL to show that it is a DXX symbol, not one inherited from a library. Move it to dxxsconf.h to shorten the command line. This is a mostly automated transform, but the changes to SConstruct were manual. git grep -lzw OGL -- '.h' '.cpp' \| xargs -0 sed -i -e 's/\(\s#\sif\)def\sOGL/\1 DXX_USE_OGL/' -e 's/\(\s#\sif\)ndef OGL/\1 !DXX_USE_OGL/' -e 's/\(\s#\s*if !\?\)defined(OGL)/\1DXX_USE_OGL/' 2016-09-24 18:06:11 +00:00			`#if !DXX_USE_OGL`
Fix various check_header_includes=1 failures 2016-12-05 00:26:11 +00:00			`#include "dsx-ns.h"`
Fix SDL build break in clipper.h 2015-10-09 02:46:09 +00:00			`#include "3d.h"`
Reduce includes in clipper.h 2014-12-14 05:23:00 +00:00			`#include "globvars.h"`
Refer to <array> directly, not through "compiler-array.h" 2020-05-02 21:18:42 +00:00			`#include <array>`
Reduce includes in clipper.h 2014-12-14 05:23:00 +00:00
Uninline namespace dcx 2015-12-13 18:00:49 +00:00			`namespace dcx {`
Use inline namespace dcx for common/3d 2015-12-05 22:57:24 +00:00
Qualify uses of std::array 2020-05-02 21:18:42 +00:00			`struct polygon_clip_points : std::array<g3s_point *, MAX_POINTS_IN_POLY> {};`
Move temporary points onto stack 2014-11-16 19:14:51 +00:00			`struct temporary_points_t`
			`{`
			`uint_fast32_t free_point_num;`
Qualify uses of std::array 2020-05-02 21:18:42 +00:00			`std::array<g3s_point, MAX_POINTS_IN_POLY> temp_points;`
			`std::array<g3s_point *, MAX_POINTS_IN_POLY> free_points;`
Move temporary points onto stack 2014-11-16 19:14:51 +00:00			`temporary_points_t();`
Pass g3s_point & to free_temp_point Only one point is freed at a time, so pass by reference. 2022-10-02 19:51:35 +00:00			`void free_temp_point(g3s_point &cp);`
Move temporary points onto stack 2014-11-16 19:14:51 +00:00			`};`

			`const polygon_clip_points &clip_polygon(polygon_clip_points &src,polygon_clip_points &dest,int nv,g3s_codes cc,temporary_points_t &);`
Use enum class for clipping_code Adjust code_window_point to use the same masks as clipping_code. Previously, it had top and bottom swapped. However, since its output was only ever compared for equality to 0, this transposition should not affect the observable behavior. 2022-10-02 19:51:35 +00:00			`void clip_line(g3s_point &p0, g3s_point &p1, clipping_code codes_or, temporary_points_t &);`
Use inline namespace dcx for common/3d 2015-12-05 22:57:24 +00:00
			`}`
Move common/3d/clipper.c -> common/3d/clipper.cpp 2012-11-11 22:12:51 +00:00			`#endif`

initial import 2006-03-20 17:12:09 +00:00			`#endif`