Precalculate the distance at which lights will fade to zero brightness.
For lights with inverse falloff, use the gate value to determine the
cut-off distance. Use this value to cull samples and avoid the ray
tracing overhead.
Hopefully not too controversially, I am going to default this to "on" with
a gate value of 0.001. Unless you have > 1000 lights contributing
fractional light values across your map, this is not going to make any
visible difference.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
May as well keep dist as the actual distance and just call ScaledDistance
twice (poor function name, btw - it's effectively the equivalent of the
"fade gate" stuff)
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Rename member lightmapcolors -> colormaps
Remove unused member surfnum
Re-order things so the data lumps are together at the end.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Looks like the original code biased these to one side, but the
oversampling will be more accurate if we evenly distribute the points
around the actual lightmap point.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
We were calculating these values for every light and for every surface,
which seems a little excessive... Also made the variable names a bit more
sensible - we had stored a direction vector, not the actual mangle values.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Check whether any of the entities have colored fields set and if so,
enable colored light output. Can still be overridden from the command line
if needed.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Implement the two extra light attenuation formulae that were added to
Benjt Jardrup's light util (http://user.tninet.se/~xir870k/readmevis.txt).
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
I guess this bug has been here a long time. This was preventing us from
using all four available lightmaps in most cases. Now fixed!
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
No more games with save/modify/restore on the entity->lightcolor.
Could have actually caused nasty races in the multithreaded case.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Stop playing silly games with saving, modifying and restoring the global
sunlight_color. A couple of variable naming changes in lightface and use
an entity pointer instead of always indexing into the global array.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Kevin Shanahan
Tyrann