Add the -soft command line option which implements post-processing on
the lightmap surface to blend adjacent samples together to smooth out
hard shadow lines.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Substantial changes to TestLineOrSky which now becomes TraceLine to
more conveniently trace lines through the BSP and, terminate the trace
on specific contents and return information about the termination
point.
TraceLine also more correcly handles the cases where points are close
enough to the node planes to be considered "on-node" to ensure we get
a good intersection point back, when requested.
Finally, the algorithm for making the small adjustments to surface
points in CalcPoints has been changed so if the surface point can't
see the midpoint, we find the obscuring surface and move the surface
point just above that. Seems to work better and eliminates some (but
not quite all - midpoint is still not quite the ideal point to use)
random black spots.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
"nominlimit" is a more sensible default - people expect negative
lights to be able to subtract from minlight. The negative colors never
really worked properly and there's not really any worthwhile use for
the (that I know of).
Hopefully nobody will be too upset by these two changes to the old
behaviour.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Brush models can now self shadow without casting shadows on their
environment, using the "_shadowself" entity key.
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
Collect the appropriate keys from the models at load time and pass them
into the minlighting function (if > world minlight).
Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
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>
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>
Kevin Shanahan
Tyrann