102 commits

Author	SHA1	Message	Date
Ian Curtis	2c23268d88	Support microtexture relative scale. The exact scaling values are not known, but a 2x difference between each level seems highly likely. We know from visual inspection from scud that the first level is exactly 4. The SDK has a function that accepts a float input for scale and does this. lod = (1/scale) + 0.5. If lod>3 lod = 3. So this is our best guess.	2016-12-09 14:13:46 +00:00
Ian Curtis	da8b63b44b	The model3 shares vertices between polygons. But it also seems to do this for polygons with different textures. This means the texture coordinate for potentially different sizes textures is shared. Currently this was broken leading to some corrupted looking textures. The fix is to simply cache the old texture coordinates, and recalculate the normalised coordinates in the new texture coordinate space.	2016-12-06 14:39:46 +00:00
Ian Curtis	10a5d2c0e1	refactor	2016-12-06 12:25:34 +00:00
Ian Curtis	eece2d75b4	tweak scroll fog logic	2016-12-04 22:37:49 +00:00
Ian Curtis	a310e8e5cf	minor optimisations	2016-11-28 17:32:25 +00:00
Ian Curtis	abc8c24b69	Only check the geometry for culling with valid node distances. We will need this later.	2016-11-27 19:30:46 +00:00
Ian Curtis	fe60d115d2	Revert changes .. if we clip against the real3d clipping planes, our wide screen hack won't work anymore.	2016-11-26 01:19:51 +00:00
Ian Curtis	665fa90425	Get clipping planes directly from the viewport data. Also no need to clip against a far plane	2016-11-26 01:12:08 +00:00
Ian Curtis	54c405709f	Need to walk back in memory and check the previous texture tiles to see if they overlap with the current textures being invalidated. If they overlap they must be cleared too. Algorithm is a bit brute forcy and more expensive than I'd like but it fixes the bad textures in Spikeout.	2016-11-22 20:30:10 +00:00
Ian Curtis	84ae8f035c	Skip processing the mipmap section of memory. The real3d doesn't create mipmaps down to 1x1 that is needed to do mipmapping properly on modern hardware anyway.	2016-11-21 09:04:56 +00:00
Ian Curtis	483ba2f398	Fix the shading in scud. When lighting is disabled the fixed shading intensities appear to be offset values added to the colour value.	2016-11-11 17:50:27 +00:00
Ian Curtis	2f49012786	change scroll fog logic to parse the lower priority viewports first	2016-10-09 18:10:57 +00:00
Ian Curtis	f0a15febd1	implement scroll fog, fixes a tonne of missing fx	2016-10-09 16:34:12 +00:00
Ian Curtis	ef11990d19	Parse out scrollfog value used for blending over the 2d background.	2016-10-08 15:41:16 +00:00
Ian Curtis	33e795de9b	Fix scenes with missing fog in ocean hunter. The game was passing negative fog densities. The sign seems to be ignored by the model 3.	2016-10-08 15:15:25 +00:00
Ian Curtis	33cf6c89d1	our scratch mem must match correct max texture size	2016-10-08 11:59:25 +00:00
Ian Curtis	c472d90fb9	Fix the sky in advanced stage in Dirt Devils. It uses a massive (for 1998 :p) 1024x256 texture.	2016-10-06 20:10:45 +00:00
Ian Curtis	c3581c9fe8	Support multiple microTextures, fixes crazy texturing in sega ski champ. I'm assuming microtextures are always located on the other memory bank to the base texture. This logic seems to work for all our games anyway.	2016-10-06 01:37:29 +00:00
Bart Trzynadlowski	458684eb22	Fixed new 3D engine's fragment shader to work on some older GPUs by reducing the number of discard statements to one	2016-08-24 22:21:18 +00:00
Ian Curtis	732bff2769	disable spot light if the extent is zero	2016-06-29 20:53:19 +00:00
Ian Curtis	efa7776871	parse some unimplemented spot light values from viewport	2016-06-27 17:35:27 +00:00
Ian Curtis	d058a29ac8	stencil translucent non textured polys	2016-06-19 23:33:06 +00:00
Ian Curtis	85c4d85562	refactor	2016-06-19 21:43:09 +00:00
Ian Curtis	c2b1db11f8	Cull geometry based on the culling distances in the nodes. Should give some sort of speedup on lower end pcs where the CPU is predominantly the bottle neck.	2016-06-16 20:05:29 +00:00
Ian Curtis	d799c63b1a	cache bound texture	2016-06-10 11:29:20 +00:00
Ian Curtis	48a79a8f14	cleaning	2016-06-10 10:18:47 +00:00
Ian Curtis	8440bc7f03	support negative exponent	2016-06-03 09:33:46 +00:00
Ian Curtis	5081ee99dc	Add code to convert the 16bit float format used by the hardware back into float 754 format. 16bit floats are used for the culling radiuses in the nodes.	2016-06-03 00:01:34 +00:00
Ian Curtis	9bc1fbf0cb	remove dead code	2016-06-02 21:26:50 +00:00
Ian Curtis	ff8e9d6aad	Check for overflow. Fixes some fade effects	2016-05-30 23:10:56 +00:00
Ian Curtis	36074d9fd5	Y texture offsets are just 5 bits. Texture coordinate wrap around happens in the same texture sheet, not into the next one. Fixes various texturing bugs in sega rally.	2016-05-30 13:25:00 +00:00
Bart Trzynadlowski	2ee0d9018e	New engine: modf -> std::modf (fixes compilation on gcc)	2016-05-28 20:54:25 +00:00
Bart Trzynadlowski	5c1a240565	New engine: expanded color indices to 12 bits from 11. Added PolygonHeader::ColorIndex and SensorColorIndex methods.	2016-05-28 20:49:10 +00:00
Bart Trzynadlowski	e4a5c341dd	Updated polygon header descriptions	2016-05-28 20:33:10 +00:00
Ian Curtis	ce03c13847	Optimise non smooth texture repeat to only effect texture boundaries, rather than poly boundaries. Fixes a few ugly artefacts	2016-05-28 13:21:35 +00:00
Ian Curtis	661f19be19	fix transparency values, values are from 0-32, not 0-16 where the top bit disables	2016-05-27 22:20:57 +00:00
Ian Curtis	2086b1c9af	Stencil layered polys, fixes shadow z fighting in some of the games. Other games maybe using stipple alpha (yuck), not sure yet.	2016-05-27 19:30:40 +00:00
Ian Curtis	3f9936d664	don't clamp after spot light code, looks much closer to h/w	2016-05-26 09:06:09 +00:00
Ian Curtis	89c987fae1	basic spotlight code	2016-05-26 00:08:12 +00:00
Ian Curtis	c5ce2b9679	fix alpha testing for texture format 7	2016-05-22 19:17:15 +00:00
Ian Curtis	65d6342947	remove dead code	2016-05-21 16:26:00 +00:00
Ian Curtis	fd3eb49369	support 4 bit textures	2016-05-21 15:50:54 +00:00
Ian Curtis	e108b56664	correctly mask pointers	2016-05-19 22:23:50 +00:00
Ian Curtis	a79fd2786a	optimise hash table access for better performance	2016-05-19 19:04:44 +00:00
Ian Curtis	ff8d311dcc	support colour table pointer	2016-05-18 23:06:41 +00:00
Ian Curtis	7e3c097a31	remove debug code	2016-05-16 17:26:53 +00:00
Ian Curtis	828fd8ebb4	Fog start is apparently the fog value at the viewport (0,0,0) I guess like an ambient value. Default value is negative	2016-05-16 17:10:04 +00:00
Ian Curtis	9e279a0c1f	Non luminous polygons seem to be effected by the lightModifier also. API seems to have no restriction in this regard, neither does the SDK. The ocean hunter requires this for some of the 2d stuff. Light modifier values only seem to exist between 0-16, which is strange for 5 bits of precision. Possibly top bit disables the effect and lower 4 bits are the value. This clearly differs from the SDK, but without this the values come out clearly wrong.	2016-05-16 10:49:00 +00:00
Ian Curtis	62eafacfc3	adjust (hopefully correct) fog equation	2016-05-16 10:44:16 +00:00
Ian Curtis	bc08276d60	preliminary specular	2016-05-15 16:24:49 +00:00