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r17786 Tuesday 11th September, 2012 at 02:46:41 UTC by Angelo Salese
Understood how the Seibu COP collision detection really works, greatly improving Godzilla, Heated Barrel and SD Gundam RT gameplay [Angelo Salese, Smitdogg]

[src/mame/drivers]	legionna.c
[src/mame/machine]	seicop.c

trunk/src/mame/machine/seicop.c

r17785	r17786
1729	1729
1730	1730	static UINT16 cop_status,cop_dist,cop_angle;
1731	1731	static UINT16 cop_hit_status;
1732		static INT32 cop_hit_val_x,cop_hit_val_y;
	1732	static INT16 cop_hit_val_x,cop_hit_val_y,cop_hit_val_z,cop_hit_val_unk;
1733	1733	static UINT32 cop_sort_lookup,cop_sort_ram_addr,cop_sort_param;
1734	1734	static INT8 cop_angle_compare;
1735	1735	static UINT8 cop_angle_mod_val;
r17785	r17786
1738	1738	int x,y;
1739	1739	int min_x,min_y,max_x,max_y;
1740	1740	UINT16 hitbox;
	1741	UINT16 hitbox_x,hitbox_y;
1741	1742	}cop_collision_info[2];
1742	1743
1743	1744	/* RE from Seibu Cup Soccer bootleg */
r17785	r17786
1757	1758	u1 == _u1_ && u2 == _u2_) \
1758	1759
1759	1760
	1761	/*
	1762	Godzilla 0x12c0 height 50m
	1763	Megaron  0x12d0 height 55m
	1764	King Ghidorah 0x12c8 100m
	1765	Mecha Ghidorah 0x12dc 140m
	1766	Mecha Godzilla 0x12d4 50m
	1767	Gigan 0x12cc 55m
	1768	*/
1760	1769	static UINT8 cop_calculate_collsion_detection(running_machine &machine)
1761	1770	{
1762	1771	static UINT8 res;
r17785	r17786
1773	1782
1774	1783	/* TODO: Legionnaire does collision detection via the other two regs,
1775	1784	for now just implement a version that allows the player to spam flying kicks and hit everything else on the screen ;-) */
1776		cop_hit_val_x = (res & 1) ? cop_collision_info[0].max_x - cop_collision_info[1].min_x : 0;
1777		cop_hit_val_y = (res & 2) ? cop_collision_info[0].max_y - cop_collision_info[1].min_y : 0;
	1785	cop_hit_val_x = (cop_collision_info[0].min_x - cop_collision_info[1].min_x) >> 16;
	1786	cop_hit_val_y = (cop_collision_info[0].min_y - cop_collision_info[1].min_y) >> 16;
	1787	cop_hit_val_z = 1;
	1788	cop_hit_val_unk = 0;//((cop_collision_info[0].min_y >> 16) != (cop_collision_info[1].min_y >> 16));
1778	1789
1779	1790	//if(res == 0)
1780		//  printf("0:%08x %08x 1:%08x %08x\n",cop_collision_info[0].min_x,cop_collision_info[0].min_y,cop_collision_info[1].min_x,cop_collision_info[1].min_y);
	1791	//popmessage("0:%08x %08x %08x 1:%08x %08x %08x\n",cop_collision_info[0].x,cop_collision_info[0].y,cop_collision_info[0].hitbox,cop_collision_info[1].x,cop_collision_info[1].y,cop_collision_info[1].hitbox);
1781	1792
1782	1793	return res;
1783	1794	}
1784	1795
	1796
1785	1797	static READ16_HANDLER( generic_cop_r )
1786	1798	{
1787	1799	UINT16 retvalue;
r17785	r17786
1802	1814	return cop_hit_status;
1803	1815
1804	1816	/* these two controls facing direction in Godzilla opponents (only vs.) - x value compare? */
	1817	case 0x182/2:
	1818	return (cop_hit_val_y);
	1819
1805	1820	case 0x184/2:
1806		return (cop_hit_val_x & 0xffff0000) >> 16;
	1821	return (cop_hit_val_x);
1807	1822
1808		case 0x182/2:
1809		return cop_hit_val_x & 0xffff;
	1823	/* Legionnaire only - z value compare? */
	1824	case 0x186/2:
	1825	return (cop_hit_val_z);
1810	1826
1811		/* Legionnaire only - y value compare? */
1812	1827	case 0x188/2:
1813		return (cop_hit_val_y & 0xffff0000) >> 16;
	1828	return cop_hit_val_unk;
1814	1829
1815		case 0x186/2:
1816		return cop_hit_val_y & 0xffff;
1817
1818	1830	/* BCD */
1819	1831	case 0x190/2:
1820	1832	case 0x192/2:
r17785	r17786
2286	2298	//(heatbrl)  | 9 | ffff | b080 | b40 bc0 bc2
2287	2299	if(COP_CMD(0xb40,0xbc0,0xbc2,0x000,0x000,0x000,0x000,0x000,u1,u2))
2288	2300	{
2289		/* Take hitbox param, TODO */
	2301	UINT8 start_x,start_y,end_x,end_y;
2290	2302	cop_collision_info[0].hitbox = space->read_word(cop_register[2]);
	2303	cop_collision_info[0].hitbox_y = space->read_word((cop_register[2]&0xffff0000)|(cop_collision_info[0].hitbox));
	2304	cop_collision_info[0].hitbox_x = space->read_word(((cop_register[2]&0xffff0000)|(cop_collision_info[0].hitbox))+2);
	2305	// TODO: z
2291	2306
2292		if(cop_collision_info[0].hitbox == 0xc8) //hack for SD Gundam
2293		{
2294		cop_collision_info[0].min_x = cop_collision_info[0].x + (0 << 16);
2295		cop_collision_info[0].min_y = cop_collision_info[0].y - (0x10 << 16);
2296		cop_collision_info[0].max_x = cop_collision_info[0].x + (0xc0 << 16);
2297		cop_collision_info[0].max_y = cop_collision_info[0].y + (0 << 16);
2298		}
	2307	start_x = (cop_collision_info[0].hitbox_x & 0xff);
	2308	start_y = (cop_collision_info[0].hitbox_y & 0xff);
	2309	end_x = (cop_collision_info[0].hitbox_x >> 8);
	2310	end_y = (cop_collision_info[0].hitbox_y >> 8);
	2311
	2312	/* TODO: understand this one */
	2313	if(start_x == 0)
	2314	cop_collision_info[0].min_x = cop_collision_info[0].x - ((0x10) << 16);
2299	2315	else
2300		{
2301		cop_collision_info[0].min_x = cop_collision_info[0].x + (0 << 16);
2302		cop_collision_info[0].min_y = cop_collision_info[0].y + (0 << 16);
2303		cop_collision_info[0].max_x = cop_collision_info[0].x + (0x10 << 16);
2304		cop_collision_info[0].max_y = cop_collision_info[0].y + (0x10 << 16);
2305		}
	2316	cop_collision_info[0].min_x = cop_collision_info[0].x + ((0) << 16);
	2317
	2318	cop_collision_info[0].min_y = cop_collision_info[0].y + ((0) << 16);
	2319	cop_collision_info[0].max_x = cop_collision_info[0].x + ((end_x) << 16);
	2320	cop_collision_info[0].max_y = cop_collision_info[0].y + ((end_y) << 16);
	2321
2306	2322	/* do the math */
2307	2323	cop_hit_status = cop_calculate_collsion_detection(space->machine());
	2324
2308	2325	return;
2309	2326	}
2310	2327
r17785	r17786
2318	2335	//(heatbrl)  | 6 | ffff | b880 | b60 be0 be2
2319	2336	if(COP_CMD(0xb60,0xbe0,0xbe2,0x000,0x000,0x000,0x000,0x000,u1,u2))
2320	2337	{
	2338	UINT8 start_x,start_y, end_x,end_y;
	2339
2321	2340	/* Take hitbox param, TODO */
2322	2341	cop_collision_info[1].hitbox = space->read_word(cop_register[3]);
	2342	cop_collision_info[1].hitbox_y = space->read_word((cop_register[3]&0xffff0000)|(cop_collision_info[1].hitbox));
	2343	cop_collision_info[1].hitbox_x = space->read_word(((cop_register[3]&0xffff0000)|(cop_collision_info[1].hitbox))+2);
	2344	// TODO: z
2323	2345
2324		cop_collision_info[1].min_x = cop_collision_info[1].x + (0 << 16);
2325		cop_collision_info[1].min_y = cop_collision_info[1].y + (0 << 16);
2326		cop_collision_info[1].max_x = cop_collision_info[1].x + (0x10 << 16);
2327		cop_collision_info[1].max_y = cop_collision_info[1].y + (0x10 << 16);
	2346	start_x = (cop_collision_info[0].hitbox_x & 0xff);
	2347	start_y = (cop_collision_info[0].hitbox_y & 0xff);
	2348	end_x = (cop_collision_info[0].hitbox_x >> 8);
	2349	end_y = (cop_collision_info[0].hitbox_y >> 8);
2328	2350
	2351	/* TODO: understand this one */
	2352	if(start_x == 0)
	2353	cop_collision_info[1].min_x = cop_collision_info[1].x - ((0x10) << 16);
	2354	else
	2355	cop_collision_info[1].min_x = cop_collision_info[1].x + ((0) << 16);
	2356
	2357	cop_collision_info[1].min_y = cop_collision_info[1].y + ((0) << 16);
	2358	cop_collision_info[1].max_x = cop_collision_info[1].x + ((end_x) << 16);
	2359	cop_collision_info[1].max_y = cop_collision_info[1].y + ((end_y) << 16);
	2360
2329	2361	//if(cop_collision_info[0].x || cop_collision_info[1].x)
2330		//popmessage("0: %08x %08x %08x 1: %08x %08x %08x",cop_collision_info[0].x,cop_collision_info[0].y,cop_collision_info[0].hitbox,cop_collision_info[1].x,cop_collision_info[1].y,cop_collision_info[1].hitbox);
2331	2362
2332	2363	/* do the math */
2333	2364	cop_hit_status = cop_calculate_collsion_detection(space->machine());

trunk/src/mame/drivers/legionna.c

r17785	r17786
2305	2305	GAME( 1992, heatbrlu, heatbrl,  heatbrl,  heatbrl, driver_device,  0,         ROT0, "TAD Corporation", "Heated Barrel (US)", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
2306	2306	GAME( 1992, heatbrle, heatbrl,  heatbrl,  heatbrl, driver_device,  0,         ROT0, "TAD Corporation", "Heated Barrel (Electronic Devices license)", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
2307	2307
2308		GAME( 1993, godzilla, 0,        godzilla, godzilla, driver_device, 0,         ROT0, "Banpresto", "Godzilla", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
	2308	GAME( 1993, godzilla, 0,        godzilla, godzilla, driver_device, 0,         ROT0, "Banpresto", "Godzilla (Japan)", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
2309	2309	GAME( 1993, grainbow, 0,        grainbow, grainbow, driver_device, 0,         ROT0, "Banpresto", "SD Gundam Sangokushi Rainbow Tairiku Senki", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
2310	2310	GAME( 1993, denjinmk, 0,        denjinmk, denjinmk, legionna_state, denjinmk,  ROT0, "Banpresto", "Denjin Makai", GAME_IMPERFECT_GRAPHICS )
2311	2311

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