q3_rest.txt

- CPM map "paradise" have too much trigger_push entities (uses cmodels), total model count > 256,
  map cannot be loaded:
  - can try to increase model count by using reserved confinstrings indexes, can be useful for
    some HL maps too (use with extprotocol)
- q3a maps not affected by CL_SetLightstyle(0, ...) - dynamicLightmap_t required?
- add "model2" field for most brush model entities to attach md3 model (q3dm19)


FOUND BUG from p99 (when moved EntityParser call from model.cpp to cmodel.cpp - after map loading):
  "wads" needed for HL surface loading, but entities parsed after map loading;
  ? bug may be easily fixed after reworking entity sustem (and remove "wads" field from bspfile_t)
  ? try to convert HL's "trigger_push"
  - also func_ladder, func_water etc (contents changers) does not works

COMBINER BUGS:
- q3dm2:
  - with MUL2 multitexturing: "wetwall" is too dark (should use ARB MUL2 mode)
  - no multitexturing at all:
    - "wetwall": uses blend mode != src*dst, which cannot be converted to src*dst*2 -- too dark
    - no PostLight dlights at all
  - std multitexturing (no MUL2):
    - windowed (no gamma overbright): "q1metal7_99spot": PostLight is too bright (when
      r_q3map_overbright=1; all ok when =0) -- this is an overflow of color buffer, combiners are
      ok (lightmap is too bright?)
    - fullscreen (have gamma overbright): everything ok
---------------------------------------------------------------------------------------------------
zoneportals (q2,q3):
! can clip visible contents with portal:
  a) no portals open - draw nothing (q2 does)
  b) 1 portal open   - compute special frustum for it (should improve performance)
  c) 2+ portals open - draw everything (q2/q3 does) or expand computed frustum by all portals
! Q2 portal game code is completely different from Q3 one, so, Q3 map portals will be "invisible"
  for Q2 game dll -- require server-side hook (or create func_areaportal entity?)
* info: Q3A zonebits computed in SV_AddEntitiesVisibleFromPoint()
! this will require geometric information about zone portal (model, surface, bbox etc)
* Q2: a) door.target.class == "func_areaportal" -> open zoneportal #target.style
         (check door_use_areaportals() in game code)
      b) standalone func_areaportal (used with doors only?) - check Use_Areaportal()
* Q3: when moving entity touched 2 zones, then when entity is in original state, portal will be
  closed, otherwise portal will be opened
---------------------------------------------------------------------------------------------------
shader lighting:
- make dlight updates for vertex lightmap DYNAMIC: do not call UpdateDynamicLightmap
  every time -- dlights should be applied in backend inside ComputeCombiners()
- q3 lightgrid support: have some maps with erased pointlight entities
  - implement as separate light source (global)
  - may use available lights (surface, sun) to emphasize light effect (may be optional)
---------------------------------------------------------------------------------------------------
vertex lighting:
- overbright vertex light for r_q3map_overbright
? vertex light (at least for trisurfs): use isDoubleRgba
---------------------------------------------------------------------------------------------------
- fence textures (with alpha-channel):
  - try to use my code for Kingpin maps/textures to prevent artifacts when far from texture
  - Q3 have lightmaps on fences; displayed in my Q2, but as separate pass - try to combine
  - try to use same tech for lighting KP fences
---------------------------------------------------------------------------------------------------
- worlspawn "music": can hook cdaudio and replace CD playback with specified music track:
  - check Q3A code: which function used to playback such audio files
  - is music completely loaded into RAM?
  - g_spawn.c::SP_worldspawn(): CD_CDTRACK set up as `va("%i", ent->sounds)', so we cannot
    send track name as configstring, it should be replaced in client-side hook
? q3map_backsplash <frac> <dist> -- generate point lights near surface light

? particles does not works in some places (should collide with patches?)
- trisurfs: dlights does not works for surfaces with "diffuse light", owned by world entity
  (code uses uses ent->center ...)
  q3 path: trisurfs uses vertex lighting, but my code requires dynamicLightmap for this

- display curves
- trace curves
- fog
? vertex lighting (no lightmap loading, using vertex light from bsp) -- q3a vertex light is ugly ...
- color saturation (lightmaps, vertex light)
- surface lighting from "autosprite" -> point light


------------------"Strange blend for LM"-----------------------
*** q3dm7 {1356,-555,-18} ***  (gl_spyShader: shader not combined!)
textures/gothic_wall/iron01_m
textures/gothic_wall/iron01_ndark
{
	{
		map $lightmap
		rgbgen identity
	}
	{
		map ...
		blendFunc GL_DST_COLOR GL_SRC_ALPHA   <---- bad ...
		rgbGen identity
		alphaGen lightingSpecular
	}
}

<---- here: exchange 1st and 2nd stages, LM will go 1st ---->
textures/sfx/bouncepad01block18b
textures/sfx/computerpurptileb
textures/gothic_button/timbutton -- r_lightmap does not works + no dlights ...
{
	{
		map ...
		rgbGen identity
	}
	{
		map $lightmap
		rgbGen identity
		blendfunc gl_dst_color gl_zero
	}
	....
}

*** q3dm1 *** (no "bad lm blend" message, simply bad lm)
textures/gothic_floor/center2trn
{
	{
		map textures/sfx/fireswirl2.tga
		tcmod rotate 333
		tcMod stretch sin .8 0.2 0 9.7
		rgbGen identity
	}
	{
		map textures/gothic_floor/center2trn.tga
		blendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA
		tcmod rotate 30
		tcMod stretch sin .8 0.2 0 .2
		rgbGen identity
	}
	{
	        map textures/gothic_floor/center2trn.tga
		blendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA
	        rgbGen identity
	}
	{
		map $lightmap
                blendFunc GL_DST_COLOR GL_ONE_MINUS_DST_ALPHA
		rgbGen identity
	}
}