1 /*******************************************************************************
2 Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
4 (c) Copyright 1996 - 2003 Gary Henderson (gary.henderson@ntlworld.com) and
5 Jerremy Koot (jkoot@snes9x.com)
7 (c) Copyright 2002 - 2003 Matthew Kendora and
8 Brad Jorsch (anomie@users.sourceforge.net)
12 C4 x86 assembler and some C emulation code
13 (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
14 _Demo_ (_demo_@zsnes.com), and
15 Nach (n-a-c-h@users.sourceforge.net)
18 (c) Copyright 2003 Brad Jorsch
21 (c) Copyright 1998 - 2003 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
22 John Weidman (jweidman@slip.net),
23 neviksti (neviksti@hotmail.com), and
24 Kris Bleakley (stinkfish@bigpond.com)
27 (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
28 Lord Nightmare (lord_nightmare@users.sourceforge.net
31 (c) Copyright 2001 - 2003 zsKnight, pagefault (pagefault@zsnes.com)
32 Ported from x86 assembler to C by sanmaiwashi
34 SPC7110 and RTC C++ emulator code
35 (c) Copyright 2002 Matthew Kendora with research by
36 zsKnight, John Weidman, and Dark Force
39 (c) Copyright 2001 John Weidman
41 Super FX x86 assembler emulator code
42 (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault
44 Super FX C emulator code
45 (c) Copyright 1997 - 1999 Ivar and Gary Henderson.
50 Specific ports contains the works of other authors. See headers in
53 Snes9x homepage: http://www.snes9x.com
55 Permission to use, copy, modify and distribute Snes9x in both binary and
56 source form, for non-commercial purposes, is hereby granted without fee,
57 providing that this license information and copyright notice appear with
58 all copies and any derived work.
60 This software is provided 'as-is', without any express or implied
61 warranty. In no event shall the authors be held liable for any damages
62 arising from the use of this software.
64 Snes9x is freeware for PERSONAL USE only. Commercial users should
65 seek permission of the copyright holders first. Commercial use includes
66 charging money for Snes9x or software derived from Snes9x.
68 The copyright holders request that bug fixes and improvements to the code
69 should be forwarded to them so everyone can benefit from the modifications
72 Super NES and Super Nintendo Entertainment System are trademarks of
73 Nintendo Co., Limited and its subsidiary companies.
74 *******************************************************************************/
95 static double c4x, c4y, c4z;
96 static double c4x2, c4y2, c4z2;
98 void C4TransfWireFrame ()
100 c4x = (double) C4WFXVal;
101 c4y = (double) C4WFYVal;
102 c4z = (double) C4WFZVal - 0x95;
105 tanval = -(double) C4WFX2Val * 3.14159265 * 2 / 128;
106 c4y2 = c4y * cos (tanval) - c4z * sin (tanval);
107 c4z2 = c4y * sin (tanval) + c4z * cos (tanval);
110 tanval = -(double)C4WFY2Val*3.14159265*2/128;
111 c4x2 = c4x * cos (tanval) + c4z2 * sin (tanval);
112 c4z = c4x * - sin (tanval) + c4z2 * cos (tanval);
115 tanval = -(double) C4WFDist * 3.14159265*2 / 128;
116 c4x = c4x2 * cos (tanval) - c4y2 * sin (tanval);
117 c4y = c4x2 * sin (tanval) + c4y2 * cos (tanval);
120 C4WFXVal = (short) (c4x*(double)C4WFScale/(0x90*(c4z+0x95))*0x95);
121 C4WFYVal = (short) (c4y*(double)C4WFScale/(0x90*(c4z+0x95))*0x95);
124 void C4TransfWireFrame2 ()
126 c4x = (double)C4WFXVal;
127 c4y = (double)C4WFYVal;
128 c4z = (double)C4WFZVal;
131 tanval = -(double) C4WFX2Val * 3.14159265 * 2 / 128;
132 c4y2 = c4y * cos (tanval) - c4z * sin (tanval);
133 c4z2 = c4y * sin (tanval) + c4z * cos (tanval);
136 tanval = -(double) C4WFY2Val * 3.14159265 * 2 / 128;
137 c4x2 = c4x * cos (tanval) + c4z2 * sin (tanval);
138 c4z = c4x * -sin (tanval) + c4z2 * cos (tanval);
141 tanval = -(double)C4WFDist * 3.14159265 * 2 / 128;
142 c4x = c4x2 * cos (tanval) - c4y2 * sin (tanval);
143 c4y = c4x2 * sin (tanval) + c4y2 * cos (tanval);
146 C4WFXVal =(short)(c4x * (double)C4WFScale / 0x100);
147 C4WFYVal =(short)(c4y * (double)C4WFScale / 0x100);
150 void C4CalcWireFrame ()
152 C4WFXVal = C4WFX2Val - C4WFXVal;
153 C4WFYVal = C4WFY2Val - C4WFYVal;
154 if (abs (C4WFXVal) > abs (C4WFYVal))
156 C4WFDist = abs (C4WFXVal) + 1;
157 C4WFYVal = (short) (256 * (double) C4WFYVal / abs (C4WFXVal));
167 C4WFDist = abs(C4WFYVal)+1;
168 C4WFXVal = (short) (256 * (double)C4WFXVal / abs (C4WFYVal));
192 C41FAngleRes = 0x180;
196 tanval = (double) C41FYVal / C41FXVal;
197 C41FAngleRes = (short) (atan (tanval) / (3.141592675 * 2) * 512);
198 C41FAngleRes = C41FAngleRes;
200 C41FAngleRes += 0x100;
201 C41FAngleRes &= 0x1FF;
207 tanval = sqrt ((double) C41FYVal * C41FYVal + (double) C41FXVal * C41FXVal);
208 C41FDist = (short) tanval;
213 tanval = sqrt ((double) C41FYVal * C41FYVal + (double) C41FXVal * C41FXVal);
214 tanval = C41FDistVal / tanval;
215 C41FYVal = (short) (C41FYVal * tanval * 0.99);
216 C41FXVal = (short) (C41FXVal * tanval * 0.98);
220 void C4LoaDMem(char *C4RAM)
222 memmove(C4RAM+(READ_WORD(C4RAM+0x1f45)&0x1fff),
223 S9xGetMemPointer(READ_3WORD(C4RAM+0x1f40)),
224 READ_WORD(C4RAM+0x1f43));