177 commits

Author	SHA1	Message	Date
Ian Curtis	2786d95795	add interface for sun clamp	2017-09-02 14:54:16 +00:00
Ian Curtis	266c911133	Optimise vertex data to cut down on unnecessary copying	2017-08-30 21:45:25 +00:00
Ian Curtis	165926aa06	Modern hardware does backface culling in window space by calculating the face normal for the polygon, then doing a dot product against the view vector. The real3d pro-1000 on the other hand passes a pre-calculated face normal for each polygon which is used for culling. We were using this face normal to rewind the polygons so that regular backface culling would work. This worked 99.9% of the time. However this was failing on some models in Virtua Striker. The reason was because the pre-calculated face normals being passed were actually completely different to the actual face normals for the poly (not just inverted like you would expect). This broke our code. The solution was to emulate face culling directly in the vertex shader using the pre-calculated face normals directly. Only minimally tested this but hopefully there are no obvious regressions.	2017-08-29 10:27:29 +00:00
Ian Curtis	b21ed49512	cosmetic	2017-08-21 23:00:29 +00:00
Ian Curtis	cd5978773a	Harry made some important discoveries with regards to fixed shading on the model 3 (per vertex poly brightness values). Firstly values are allowed to be negative, and they are used as a drop in replacement in the standard lighting equation for the normal dot light vector. This quite radically changes the brightness in LA Machine guns, but now correctly matches the arcade.	2017-08-19 20:06:31 +00:00
Ian Curtis	0efd4dac39	Finish fixed shading for 2.0 hardware. I'm pretty sure it actually works identically to step 1.5 hardware. The oddball is LA machine guns where the viewport ambient doesn't seem to effect the brightness. But the ambient works differently in this game because it uses the unclamped light model. Still need to investigate if the diffuse factor effects fixed shading.	2017-08-15 23:21:57 +00:00
Ian Curtis	2422caadc6	Pad struct and align on 4 byte boundary.	2017-08-15 20:45:08 +00:00
Ian Curtis	eac76f0908	simplify	2017-08-14 23:30:34 +00:00
Ian Curtis	c12e4c3215	Fixed shading (per vertex poly colours) on step 1.5 hardware have the viewport ambient value added to them. This fixes various shading on scud. To do this had to switch the maths to the vertex shader.	2017-08-14 09:14:06 +00:00
Ian Curtis	8f622714a7	Fix attribute locations. glBindAttribLocation must be called linking	2017-08-11 11:59:41 +00:00
Bart Trzynadlowski	a315627401	Added support for loading shaders from files for new engine and tile renderer. Changed help text to reflect new engine being default.	2017-08-11 00:41:10 +00:00
Ian Curtis	d7403afda6	use generic vertex attributes	2017-08-10 15:43:03 +00:00
Ian Curtis	5709ee2659	Sometime ago I managed to work out that specular on the model3 is not real specular, and really is just an extension of diffuse lighting. But attempts were derailed by corner cases and the fact we were not handling the normals correctly. Anyway Harry managed to successfully come up with an algorithm, and coefficients that give an almost perfect match to specular on the model3, based soley on observations from video footage! He also worked out that the lighting on hardware 1.5 onwards appears to be unclamped (ie greater than 1). This quite radically changes the brightness of some of the games, but much better matches the original hardware.	2017-08-09 16:56:56 +00:00
Ian Curtis	3fc28159eb	Add the unclamped light model we know exists to the shaders.	2017-08-03 10:41:18 +00:00
Ian Curtis	b1bd877b82	Ski champ for some reason is passing denormalised numbers for the modelscale. This is causing a NaN in our shader killing the lighting for these models, so we simply skip these, since they are essentially zero anyway. Thanks to Harry for finding this bug :)	2017-08-01 23:48:53 +00:00
Ian Curtis	9aa3f13777	We were force normalising the result of matrix * normal, which looked correct in most cases. But this didn't preserve the scaling of the matrix, or the scaling of the model normals which resulted in many over bright areas. On it's own this generally worked, but games like Star Wars looked quite broken. Harry correctly figured out if you scale these normals by the scaling value that is sometimes present in the culling nodes the lighting looks correct. Still more work to do to correctly figure out the model3's lighting model.	2017-07-29 16:30:30 +00:00
Ian Curtis	a9b49c1676	Implement unclamped light model based upon Harry's findings. Unknown how this is turned on/off.	2017-07-22 17:15:14 +00:00
Ian Curtis	9e9a549283	remove WIP code	2017-06-25 20:09:45 +00:00
Ian Curtis	ec3872d108	convert sun angle coordinate system outside of the shader	2017-06-25 19:50:02 +00:00
Ian Curtis	97781108e8	A second go at fixing the fixed lighting in star wars .. Fixed shading is per vertex poly colours. For some reason in star wars they are treated as unsigned values instead of signed, like in every other game. These polys are all marked with specular enabled, where as in the rest of the games they are missing this flag. That's the only difference I can find.	2017-06-21 17:04:53 +00:00
Ian Curtis	1532168af7	fix double offset	2017-06-20 21:44:58 +00:00
Ian Curtis	b00315b072	Revert previous fixed shading changes. Implement new logic for fixed shading on step 1.5 hardware based upon Harry's findings.	2017-06-20 20:13:42 +00:00
Ian Curtis	260daa1b91	Fix the fix shading in star wars. Fixed shading still needs some work for mag truck and dirt devils to match the arcade.	2017-06-17 16:05:54 +00:00
Ian Curtis	73a7d2760d	cosmetic	2017-06-07 23:16:22 +00:00
Ian Curtis	1193069709	Tweak scroll fog logic again .. should fix missing 2d fogging in Spikeout.	2017-06-07 23:14:01 +00:00
Ian Curtis	45741b24d2	rewrite scroll fog logic	2017-05-06 16:47:31 +00:00
Ian Curtis	80004b0dad	Remove debug code	2017-04-25 00:31:39 +00:00
Ian Curtis	7694e4eb0c	minor culling node optimisations	2017-04-25 00:10:55 +00:00
Ian Curtis	ff936c588b	don't need cast, conversion is implicit	2017-04-20 19:46:40 +00:00
Ian Curtis	912bb0e7cf	better state handling	2017-04-20 19:43:41 +00:00
Ian Curtis	9b226ed478	parse out some culling node values	2017-04-17 10:40:07 +00:00
Ian Curtis	3c78571615	There are 2 bits in the polyheader labelled discard. When both are set ie in sega rally, the polygons are totally discarded. Scud seems to set bit 1 which seems halve the opacity.	2017-04-15 19:00:46 +00:00
Ian Curtis	21836c088c	The real3d has a flag that allows the hw to skip polygons so that they aren't rendered. Sega rally2 uses this for the dust effects. Triangles or quads that have this flag are junk, and look like random corruption if you try to draw them. We assumed polys that shared vertices with these bad polygons were also bad. It turns out the last few shared vertices in these polys were in fact valid, and thus the entire quad/triangle strip should be drawn and not discarded.	2017-04-14 23:41:11 +00:00
Ian Curtis	fc50bdee98	light parameters must be clamped (HarryTuttle)	2017-04-14 00:08:17 +00:00
Ian Curtis	391aafd4c1	Virtua fighter has a few massive polys that shouldn't be visible. It looks like these polys have a bad matrix, but the node distances are all zero. This means the bounding box that encapsulates them is of size zero. Skipping over these entirely seems to fix the issue.	2017-04-12 15:47:57 +00:00
Ian Curtis	edfb521a9b	Daytona seems to use this completely undocumented feature of the real3d pro-1000, the ability to invert texture colours. This patch fixes the colours on the cars, and the signs which should flash by alternating their colours.	2017-04-05 17:57:38 +00:00
Ian Curtis	f0e00c5dc7	Rewrite the spot light code, and implement the missing fog logic. (HarryTuttle)	2017-04-02 21:03:59 +00:00
Bart Trzynadlowski	f34e25dfc7	Massive internal change: removed CConfig object and replaced it with a hierarchical config object system (Util::Config::Node). Games are now defined in an XML file. Hopefully I didn't break too many things :/	2017-03-27 03:19:15 +00:00
Ian Curtis	ff624afb4d	The mipmap data in some games seems to being sent behind the base textures, and when the base textures are bound and created the mipmap chain is not yet valid in memory. To fix this, we invalidate the base textures, when the mipmap chain is updated.	2017-03-25 00:06:24 +00:00
Ian Curtis	9780f333b4	The model3 has this weird issue where the 2d and 3d planes are misaligned by 2 pixels. Originally I made a quick hack that shifted subviewports 2 pixels. But apparently that wasn't enough, as the issue effects everything. Thanks to HarryTuttle for pointing this out, and making a patch :)	2017-03-19 01:33:45 +00:00
Ian Curtis	dcd018ab7e	Change microtexture scaling values. Seem to much better match expected output. (thanks HarryTuttle)	2017-03-12 19:00:00 +00:00
Ian Curtis	503c88df11	fix the bad projection matrix in dirt devils and lost world	2017-03-07 01:29:07 +00:00
Ian Curtis	f173c3c3ce	The hardware actually seems to treat the quad primitive as a triangle strip. The winding order can actually change between the first and second 'triangle' inside the quad, leading our code to incorrectly backface cull the 2nd triangle. So we must re-calculate the winding order for the 2nd triangle. This fixes a massive missing poly in the road in la machine guns, probably other games too. The hardware is unaffected by the winding order, as it doesn't calculate the poly normal from the vertices directly, instead it uses the provided normal in the poly header.	2017-02-21 23:35:40 +00:00
Ian Curtis	5b9741bd5d	Support high priority polygons. They are treated as a separate overlay plane by the h/w. Fixes some missing fx in harley.	2017-02-20 17:22:32 +00:00
Ian Curtis	4a116190b5	When the translator map?? bit is enabled the colour format seems to be 4-5bit. Max observed value is 16. Scaling these values up seems to produce the correct colours in harley and dirt devils.	2017-02-16 17:20:42 +00:00
Ian Curtis	7407d03036	Put a check in there, in case near values come out really close to zero. Fixes a slight corner case in lemans24. A check probably should have been there originally :)	2017-02-08 16:14:50 +00:00
Ian Curtis	24cbeed526	Dynamically calculate near/far frustum planes for each viewport priority layer by clipping the overlapping meshes with the 4 frustum planes. A bit brute forcy, but the results are great.	2017-02-07 14:05:03 +00:00
Ian Curtis	144125a62e	mark the nodes without valid distances set	2017-02-05 15:36:05 +00:00
Ian Curtis	c82dc55485	cosmetics	2016-12-22 22:11:19 +00:00
Ian Curtis	72dd0dbf98	only need to cull against 4 clipping planes	2016-12-22 22:09:13 +00:00
Ian Curtis	20a9514aa2	For scroll fog set the viewport to the entire area, allows fog to work in widescreen mode	2016-12-15 19:27:08 +00:00
Ian Curtis	ca7046729e	properly cache un-normalised texture coordinates, fixes a texturing regression in Daytona	2016-12-15 12:10:52 +00:00
Ian Curtis	f355e2d062	fix microtexture colours	2016-12-15 00:45:32 +00:00
Ian Curtis	89e75a9803	Only check scroll fog value from the first viewport from each priority layer. Seems to fix problems with background fogging.	2016-12-14 19:57:05 +00:00
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	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	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
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	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
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	c5ce2b9679	fix alpha testing for texture format 7	2016-05-22 19:17:15 +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	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	bc08276d60	preliminary specular	2016-05-15 16:24:49 +00:00
Ian Curtis	c4b5b185c6	Disable light modifier on fog, seems not to work .. values don't make sense. Maybe the model3 doesn't use these.	2016-05-13 19:26:10 +00:00
Ian Curtis	c8f8cd1655	remove dead code	2016-05-13 08:40:53 +00:00
Ian Curtis	e295ad6868	double up polys for two sided polys, fixes some diffuse lighting problems	2016-05-13 08:39:48 +00:00
Bart Trzynadlowski	ddf3d5213d	FLT_MAX -> std::numeric_limits<float>::max()	2016-05-10 03:08:36 +00:00
Ian Curtis	43add90d2f	Fix bad texture seems	2016-05-09 16:26:34 +00:00
Ian Curtis	242cddac2d	remove pointless loop	2016-05-07 15:45:02 +00:00
Ian Curtis	ded3168060	Split face colour from per vertex poly colour. Fixes colour bleeding between connected polys in harley.	2016-05-07 15:28:04 +00:00
Bart Trzynadlowski	fee1cfb126	Fixed compilation on gcc (gotos cannot cross variable declarations)	2016-05-05 22:01:59 +00:00
Ian Curtis	da4bab5f9b	Flat shaded polys can't share vertex normals with adjacent connected polys. Fixes some bad lighting in Harley on pavements	2016-05-05 08:06:06 +00:00