From d40ae99422e118188a7f48055dc340c6aca022aa Mon Sep 17 00:00:00 2001 From: Kitty Draper Date: Sat, 5 Mar 2011 21:39:25 -0500 Subject: first commit --- source/c4.cpp | 237 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 237 insertions(+) create mode 100644 source/c4.cpp (limited to 'source/c4.cpp') diff --git a/source/c4.cpp b/source/c4.cpp new file mode 100644 index 0000000..8774f46 --- /dev/null +++ b/source/c4.cpp @@ -0,0 +1,237 @@ +/******************************************************************************* + Snes9x - Portable Super Nintendo Entertainment System (TM) emulator. + + (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and + Jerremy Koot (jkoot@snes9x.com) + + (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net) + + (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net), + funkyass (funkyass@spam.shaw.ca), + Joel Yliluoma (http://iki.fi/bisqwit/) + Kris Bleakley (codeviolation@hotmail.com), + Matthew Kendora, + Nach (n-a-c-h@users.sourceforge.net), + Peter Bortas (peter@bortas.org) and + zones (kasumitokoduck@yahoo.com) + + C4 x86 assembler and some C emulation code + (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com), + _Demo_ (_demo_@zsnes.com), and Nach + + C4 C++ code + (c) Copyright 2003 Brad Jorsch + + DSP-1 emulator code + (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson, + John Weidman, neviksti (neviksti@hotmail.com), + Kris Bleakley, Andreas Naive + + DSP-2 emulator code + (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and + Lord Nightmare (lord_nightmare@users.sourceforge.net + + OBC1 emulator code + (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and + Kris Bleakley + Ported from x86 assembler to C by sanmaiwashi + + SPC7110 and RTC C++ emulator code + (c) Copyright 2002 Matthew Kendora with research by + zsKnight, John Weidman, and Dark Force + + S-DD1 C emulator code + (c) Copyright 2003 Brad Jorsch with research by + Andreas Naive and John Weidman + + S-RTC C emulator code + (c) Copyright 2001 John Weidman + + ST010 C++ emulator code + (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora + + Super FX x86 assembler emulator code + (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault + + Super FX C emulator code + (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman + + + SH assembler code partly based on x86 assembler code + (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se) + + + Specific ports contains the works of other authors. See headers in + individual files. + + Snes9x homepage: http://www.snes9x.com + + Permission to use, copy, modify and distribute Snes9x in both binary and + source form, for non-commercial purposes, is hereby granted without fee, + providing that this license information and copyright notice appear with + all copies and any derived work. + + This software is provided 'as-is', without any express or implied + warranty. In no event shall the authors be held liable for any damages + arising from the use of this software. + + Snes9x is freeware for PERSONAL USE only. Commercial users should + seek permission of the copyright holders first. Commercial use includes + charging money for Snes9x or software derived from Snes9x. + + The copyright holders request that bug fixes and improvements to the code + should be forwarded to them so everyone can benefit from the modifications + in future versions. + + Super NES and Super Nintendo Entertainment System are trademarks of + Nintendo Co., Limited and its subsidiary companies. +*******************************************************************************/ +#include +#include +#include "c4.h" +#include "memmap.h" +extern "C" { + +short C4WFXVal; +short C4WFYVal; +short C4WFZVal; +short C4WFX2Val; +short C4WFY2Val; +short C4WFDist; +short C4WFScale; + +static double tanval; +static double c4x, c4y, c4z; +static double c4x2, c4y2, c4z2; + +void C4TransfWireFrame () +{ + c4x = (double) C4WFXVal; + c4y = (double) C4WFYVal; + c4z = (double) C4WFZVal - 0x95; + + // Rotate X + tanval = -(double) C4WFX2Val * 3.14159265 * 2 / 128; + c4y2 = c4y * cos (tanval) - c4z * sin (tanval); + c4z2 = c4y * sin (tanval) + c4z * cos (tanval); + + // Rotate Y + tanval = -(double)C4WFY2Val*3.14159265*2/128; + c4x2 = c4x * cos (tanval) + c4z2 * sin (tanval); + c4z = c4x * - sin (tanval) + c4z2 * cos (tanval); + + // Rotate Z + tanval = -(double) C4WFDist * 3.14159265*2 / 128; + c4x = c4x2 * cos (tanval) - c4y2 * sin (tanval); + c4y = c4x2 * sin (tanval) + c4y2 * cos (tanval); + + // Scale + C4WFXVal = (short) (c4x*(double)C4WFScale/(0x90*(c4z+0x95))*0x95); + C4WFYVal = (short) (c4y*(double)C4WFScale/(0x90*(c4z+0x95))*0x95); +} + +void C4TransfWireFrame2 () +{ + c4x = (double)C4WFXVal; + c4y = (double)C4WFYVal; + c4z = (double)C4WFZVal; + + // Rotate X + tanval = -(double) C4WFX2Val * 3.14159265 * 2 / 128; + c4y2 = c4y * cos (tanval) - c4z * sin (tanval); + c4z2 = c4y * sin (tanval) + c4z * cos (tanval); + + // Rotate Y + tanval = -(double) C4WFY2Val * 3.14159265 * 2 / 128; + c4x2 = c4x * cos (tanval) + c4z2 * sin (tanval); + c4z = c4x * -sin (tanval) + c4z2 * cos (tanval); + + // Rotate Z + tanval = -(double)C4WFDist * 3.14159265 * 2 / 128; + c4x = c4x2 * cos (tanval) - c4y2 * sin (tanval); + c4y = c4x2 * sin (tanval) + c4y2 * cos (tanval); + + // Scale + C4WFXVal =(short)(c4x * (double)C4WFScale / 0x100); + C4WFYVal =(short)(c4y * (double)C4WFScale / 0x100); +} + +void C4CalcWireFrame () +{ + C4WFXVal = C4WFX2Val - C4WFXVal; + C4WFYVal = C4WFY2Val - C4WFYVal; + if (abs (C4WFXVal) > abs (C4WFYVal)) + { + C4WFDist = abs (C4WFXVal) + 1; + C4WFYVal = (short) (256 * (double) C4WFYVal / abs (C4WFXVal)); + if (C4WFXVal < 0) + C4WFXVal = -256; + else + C4WFXVal = 256; + } + else + { + if (C4WFYVal != 0) + { + C4WFDist = abs(C4WFYVal)+1; + C4WFXVal = (short) (256 * (double)C4WFXVal / abs (C4WFYVal)); + if (C4WFYVal < 0) + C4WFYVal = -256; + else + C4WFYVal = 256; + } + else + C4WFDist = 0; + } +} + +short C41FXVal; +short C41FYVal; +short C41FAngleRes; +short C41FDist; +short C41FDistVal; + +void C4Op1F () +{ + if (C41FXVal == 0) + { + if (C41FYVal > 0) + C41FAngleRes = 0x80; + else + C41FAngleRes = 0x180; + } + else + { + tanval = (double) C41FYVal / C41FXVal; + C41FAngleRes = (short) (atan (tanval) / (3.141592675 * 2) * 512); + C41FAngleRes = C41FAngleRes; + if (C41FXVal< 0) + C41FAngleRes += 0x100; + C41FAngleRes &= 0x1FF; + } +} + +void C4Op15() +{ + tanval = sqrt ((double) C41FYVal * C41FYVal + (double) C41FXVal * C41FXVal); + C41FDist = (short) tanval; +} + +void C4Op0D() +{ + tanval = sqrt ((double) C41FYVal * C41FYVal + (double) C41FXVal * C41FXVal); + tanval = C41FDistVal / tanval; + C41FYVal = (short) (C41FYVal * tanval * 0.99); + C41FXVal = (short) (C41FXVal * tanval * 0.98); +} + +#ifdef ZSNES_C4 +void C4LoaDMem(char *C4RAM) +{ + memmove(C4RAM+(READ_WORD(C4RAM+0x1f45)&0x1fff), + S9xGetMemPointer(READ_3WORD(C4RAM+0x1f40)), + READ_WORD(C4RAM+0x1f43)); +} +#endif +}//end extern C + -- cgit v1.2.3