mirror of
https://github.com/dborth/snes9xgx.git
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345 lines
9.8 KiB
C++
345 lines
9.8 KiB
C++
/***********************************************************************************
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com),
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Jerremy Koot (jkoot@snes9x.com)
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(c) Copyright 2002 - 2004 Matthew Kendora
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(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
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(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
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(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
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(c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca),
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Kris Bleakley (codeviolation@hotmail.com)
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(c) Copyright 2002 - 2010 Brad Jorsch (anomie@users.sourceforge.net),
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Nach (n-a-c-h@users.sourceforge.net),
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(c) Copyright 2002 - 2011 zones (kasumitokoduck@yahoo.com)
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(c) Copyright 2006 - 2007 nitsuja
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(c) Copyright 2009 - 2018 BearOso,
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OV2
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(c) Copyright 2017 qwertymodo
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(c) Copyright 2011 - 2017 Hans-Kristian Arntzen,
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Daniel De Matteis
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(Under no circumstances will commercial rights be given)
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BS-X C emulator code
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(c) Copyright 2005 - 2006 Dreamer Nom,
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zones
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C4 x86 assembler and some C emulation code
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(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
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Nach,
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zsKnight (zsknight@zsnes.com)
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C4 C++ code
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(c) Copyright 2003 - 2006 Brad Jorsch,
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Nach
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DSP-1 emulator code
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(c) Copyright 1998 - 2006 _Demo_,
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Andreas Naive (andreasnaive@gmail.com),
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Gary Henderson,
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Ivar (ivar@snes9x.com),
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John Weidman,
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Kris Bleakley,
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Matthew Kendora,
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Nach,
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neviksti (neviksti@hotmail.com)
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DSP-2 emulator code
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(c) Copyright 2003 John Weidman,
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Kris Bleakley,
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Lord Nightmare (lord_nightmare@users.sourceforge.net),
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Matthew Kendora,
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neviksti
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DSP-3 emulator code
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(c) Copyright 2003 - 2006 John Weidman,
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Kris Bleakley,
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Lancer,
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z80 gaiden
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DSP-4 emulator code
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(c) Copyright 2004 - 2006 Dreamer Nom,
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John Weidman,
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Kris Bleakley,
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Nach,
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z80 gaiden
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OBC1 emulator code
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(c) Copyright 2001 - 2004 zsKnight,
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pagefault (pagefault@zsnes.com),
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Kris Bleakley
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Ported from x86 assembler to C by sanmaiwashi
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SPC7110 and RTC C++ emulator code used in 1.39-1.51
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(c) Copyright 2002 Matthew Kendora with research by
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zsKnight,
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John Weidman,
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Dark Force
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SPC7110 and RTC C++ emulator code used in 1.52+
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(c) Copyright 2009 byuu,
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neviksti
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S-DD1 C emulator code
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(c) Copyright 2003 Brad Jorsch with research by
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Andreas Naive,
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John Weidman
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S-RTC C emulator code
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(c) Copyright 2001 - 2006 byuu,
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John Weidman
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ST010 C++ emulator code
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(c) Copyright 2003 Feather,
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John Weidman,
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Kris Bleakley,
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Matthew Kendora
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Super FX x86 assembler emulator code
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(c) Copyright 1998 - 2003 _Demo_,
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pagefault,
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zsKnight
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Super FX C emulator code
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(c) Copyright 1997 - 1999 Ivar,
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Gary Henderson,
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John Weidman
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Sound emulator code used in 1.5-1.51
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(c) Copyright 1998 - 2003 Brad Martin
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(c) Copyright 1998 - 2006 Charles Bilyue'
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Sound emulator code used in 1.52+
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(c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com)
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S-SMP emulator code used in 1.54+
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(c) Copyright 2016 byuu
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SH assembler code partly based on x86 assembler code
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(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
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2xSaI filter
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(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
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HQ2x, HQ3x, HQ4x filters
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(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
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NTSC filter
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(c) Copyright 2006 - 2007 Shay Green
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GTK+ GUI code
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(c) Copyright 2004 - 2018 BearOso
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Win32 GUI code
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(c) Copyright 2003 - 2006 blip,
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funkyass,
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Matthew Kendora,
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Nach,
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nitsuja
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(c) Copyright 2009 - 2018 OV2
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Mac OS GUI code
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(c) Copyright 1998 - 2001 John Stiles
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(c) Copyright 2001 - 2011 zones
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Libretro port
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(c) Copyright 2011 - 2017 Hans-Kristian Arntzen,
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Daniel De Matteis
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(Under no circumstances will commercial rights be given)
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Specific ports contains the works of other authors. See headers in
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individual files.
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Snes9x homepage: http://www.snes9x.com/
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Permission to use, copy, modify and/or distribute Snes9x in both binary
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and source form, for non-commercial purposes, is hereby granted without
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fee, providing that this license information and copyright notice appear
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with all copies and any derived work.
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This software is provided 'as-is', without any express or implied
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warranty. In no event shall the authors be held liable for any damages
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arising from the use of this software or it's derivatives.
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Snes9x is freeware for PERSONAL USE only. Commercial users should
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seek permission of the copyright holders first. Commercial use includes,
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but is not limited to, charging money for Snes9x or software derived from
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Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
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using Snes9x as a promotion for your commercial product.
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The copyright holders request that bug fixes and improvements to the code
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should be forwarded to them so everyone can benefit from the modifications
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in future versions.
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Super NES and Super Nintendo Entertainment System are trademarks of
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Nintendo Co., Limited and its subsidiary companies.
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***********************************************************************************/
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#include <math.h>
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#include "snes9x.h"
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#include "memmap.h"
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#define C4_PI 3.14159265
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int16 C4WFXVal;
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int16 C4WFYVal;
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int16 C4WFZVal;
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int16 C4WFX2Val;
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int16 C4WFY2Val;
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int16 C4WFDist;
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int16 C4WFScale;
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int16 C41FXVal;
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int16 C41FYVal;
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int16 C41FAngleRes;
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int16 C41FDist;
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int16 C41FDistVal;
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static double tanval;
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static double c4x, c4y, c4z;
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static double c4x2, c4y2, c4z2;
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void C4TransfWireFrame (void)
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{
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c4x = (double) C4WFXVal;
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c4y = (double) C4WFYVal;
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c4z = (double) C4WFZVal - 0x95;
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// Rotate X
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tanval = -(double) C4WFX2Val * C4_PI * 2 / 128;
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c4y2 = c4y * cos(tanval) - c4z * sin(tanval);
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c4z2 = c4y * sin(tanval) + c4z * cos(tanval);
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// Rotate Y
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tanval = -(double) C4WFY2Val * C4_PI * 2 / 128;
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c4x2 = c4x * cos(tanval) + c4z2 * sin(tanval);
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c4z = c4x * -sin(tanval) + c4z2 * cos(tanval);
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// Rotate Z
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tanval = -(double) C4WFDist * C4_PI * 2 / 128;
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c4x = c4x2 * cos(tanval) - c4y2 * sin(tanval);
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c4y = c4x2 * sin(tanval) + c4y2 * cos(tanval);
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// Scale
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C4WFXVal = (int16) (c4x * (double) C4WFScale / (0x90 * (c4z + 0x95)) * 0x95);
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C4WFYVal = (int16) (c4y * (double) C4WFScale / (0x90 * (c4z + 0x95)) * 0x95);
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}
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void C4TransfWireFrame2 (void)
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{
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c4x = (double) C4WFXVal;
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c4y = (double) C4WFYVal;
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c4z = (double) C4WFZVal;
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// Rotate X
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tanval = -(double) C4WFX2Val * C4_PI * 2 / 128;
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c4y2 = c4y * cos(tanval) - c4z * sin(tanval);
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c4z2 = c4y * sin(tanval) + c4z * cos(tanval);
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// Rotate Y
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tanval = -(double) C4WFY2Val * C4_PI * 2 / 128;
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c4x2 = c4x * cos(tanval) + c4z2 * sin(tanval);
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c4z = c4x * -sin(tanval) + c4z2 * cos(tanval);
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// Rotate Z
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tanval = -(double) C4WFDist * C4_PI * 2 / 128;
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c4x = c4x2 * cos(tanval) - c4y2 * sin(tanval);
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c4y = c4x2 * sin(tanval) + c4y2 * cos(tanval);
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// Scale
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C4WFXVal = (int16) (c4x * (double) C4WFScale / 0x100);
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C4WFYVal = (int16) (c4y * (double) C4WFScale / 0x100);
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}
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void C4CalcWireFrame (void)
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{
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C4WFXVal = C4WFX2Val - C4WFXVal;
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C4WFYVal = C4WFY2Val - C4WFYVal;
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if (abs(C4WFXVal) > abs(C4WFYVal))
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{
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C4WFDist = abs(C4WFXVal) + 1;
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C4WFYVal = (int16) (256 * (double) C4WFYVal / abs(C4WFXVal));
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if (C4WFXVal < 0)
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C4WFXVal = -256;
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else
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C4WFXVal = 256;
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}
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else
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{
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if (C4WFYVal != 0)
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{
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C4WFDist = abs(C4WFYVal) + 1;
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C4WFXVal = (int16) (256 * (double) C4WFXVal / abs(C4WFYVal));
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if (C4WFYVal < 0)
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C4WFYVal = -256;
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else
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C4WFYVal = 256;
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}
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else
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C4WFDist = 0;
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}
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}
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void C4Op1F (void)
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{
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if (C41FXVal == 0)
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{
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if (C41FYVal > 0)
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C41FAngleRes = 0x80;
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else
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C41FAngleRes = 0x180;
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}
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else
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{
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tanval = (double) C41FYVal / C41FXVal;
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C41FAngleRes = (int16) (atan(tanval) / (C4_PI * 2) * 512);
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if (C41FXVal< 0)
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C41FAngleRes += 0x100;
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C41FAngleRes &= 0x1FF;
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}
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}
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void C4Op15 (void)
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{
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tanval = sqrt((double) C41FYVal * C41FYVal + (double) C41FXVal * C41FXVal);
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C41FDist = (int16) tanval;
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}
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void C4Op0D (void)
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{
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tanval = sqrt((double) C41FYVal * C41FYVal + (double) C41FXVal * C41FXVal);
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tanval = C41FDistVal / tanval;
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C41FYVal = (int16) (C41FYVal * tanval * 0.99);
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C41FXVal = (int16) (C41FXVal * tanval * 0.98);
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}
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uint8 * S9xGetBasePointerC4 (uint16 Address)
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{
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if (Address >= 0x7f40 && Address <= 0x7f5e)
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return (NULL);
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return (Memory.C4RAM - 0x6000);
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}
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uint8 * S9xGetMemPointerC4 (uint16 Address)
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{
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if (Address >= 0x7f40 && Address <= 0x7f5e)
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return (NULL);
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return (Memory.C4RAM - 0x6000 + (Address & 0xffff));
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}
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