Video Setup has Anti-Aliasing (Android's choices its own), Shadow Resolution and Per-Pixel Lighting, its rows closer and the help lower for them to fit; Audio Setup has Reverb.
display.anti_aliasing, off by default: "fxaa" or "smaa" (a pass over the
3D view before the HUD and menus; SMAA vendored from port/third_party/smaa,
MIT), "ssaa2x" (the screen's targets at twice the resolution, at most the
GPU's largest target) and "msaa2x" to "msaa8x". Multisampled framebuffers
have every attachment multisampled, so the mirror's view with the back
buffer's depth buffer is too, and a target's texture and renderbuffer stay
coherent. The setting is read again between frames. Android has FXAA for
SMAA and no supersampling.
Based on #38 and #39 by Tyberious.
display.per_pixel_lighting (off by default) lights the models for each
pixel by the same ambient, distant and point lights the model lighting
programs (9, 10, 17 and 27) sum for each vertex. The normal and position
are found in each program's instructions and the program is checked to
light as the pixel shader does; the lights come in a small uniform of
their own, and a shader that fails falls back to per-vertex lighting.
Based on #48 by Tyberious.
display.shadow_resolution (128 by default, as on the Xbox; 256, 512 or
1024) draws the two shadow maps larger. The blur's taps move to half a
texel of the larger map and two passes more for each doubling widen it
to the Xbox's tent, so the shadows keep their softness.
Based on #47 by Tyberious.
Based on #44 and #46 by Tyberious. 3D voices send to an I3DL2 reverb of the camera's sound environment, and obstruction and occlusion muffle their direct path above the HF reference (occlusion their send too). Both use the fixed distance; a maximum distance under the minimum is held at it. A change of environment crossfades the delays and gains over 85 ms, the filters' coefficients ramp over each mix, the diffusers, lines and filters flush denormals, and the reverb stops while it is quiet. audio.reverb (default true) is read again when the settings change.
Fixup for #42: a voice at the output rate or slower blends two rows of weights by its phase instead of working out each tap's (the same low pass, a third of the work), and a voice turned all the way down only moves on.
Fixups for #99 and #112: the version raised for the object message's
shader permutation, NETCODE.md brought up to date, a networked glass
break's sound placed where it broke, a frame scratch pool that runs out
logged once, and the new comments marked as the port's.
With many enemies (co-op's extra enemies) object memory runs low and the
garbage collector prints "garbage collection critical" and "removing
objects" at every pass, filling the screen for the host and every client.
They are the game's own chatter, so they show as game.console_log says, as
the sound and texture caches' already do; the log keeps every line.
The host's notice of a broken surface carries no damage effect. The client filled a damage record with zeros and then read tag 0, which is the scenario, and halted. Shards still spawn. They skip the kick from an effect this machine never received.
The frame scratch pool was still the Xbox size after the particle pool grew eight times, so a busy level spent it every frame. It now grows with that particle pool, and a frame that still runs out is logged once.
A console line longer than the buffer halted inside the error printer, before the reason was written to the log. Long lines are cut to fit, and the reason is written first.
Fixups for #102, #103 and #105-#107: the version raised for the glass,
scenery, cutscene cluster and revert messages, NETCODE.md brought up to
date, co-op's followers' object lists freed as soon as they are used, and
extra enemies that find no free ground placed on the rings they used before
rather than left out (at 32x a quarter of them were), with the places found
taken not tried again for the rest of the squad, and the way to a place
looked along level.
The Silent Cartographer with 32x co-op enemies (484 actors) went from 53
to about 97 fps on the Linux PC, with the same game and the same picture:
cluster list removals start where the reference was put, full data arrays
are not walked again, object lighting keeps each cluster's drawn lights
and passes over far ones without their distance, the per-texture profile
timer only runs while something reads it, and the renderer binds streams
once per draw, caches its texture, target and shader lookups, and no
longer makes Mesa's GL thread wait on large uploads or visibility tests.
What the followers of player0 do (teleport, suspend, get out, board) is a
function each in coop_scripts.c, so every engine hook is one call. The
cutscene skip reverts only in a local game or on a co-op host, written as
two plain branches; a non-co-op network host no longer reverts alone.
coop_enemies_spot_free makes every check of a spot (way, floor, headroom,
nobody there) in one place, each constant has its own comment, and the
file comment's wrapping is fixed.
Breakable surfaces (glass) are broken by each machine's own projectiles
with its own random damage, so a pane could shatter on the host and stay
whole, still blocking, on a client. In co-op the host now sends each break
(and a few again every refresh, for late joiners), and a client breaks the
same surface with its shards.
Destructible scenery and devices (lights, panels) are the map's, at the
same index on every machine, but only damage to units was synced: a
client's shots never damaged them, and what the host broke didn't break
or play its effects on the clients. A client now reports its hits on them
like any other, the host checks and deals them, and every client deals the
host's damage to its own copy, which breaks, plays its effects and is
destroyed as the host's was.
Both are new message kinds that a client without them ignores, so the
network version is unchanged.
The pause menu's revert (main_revert_map) reverted a network client's own
game state, leaving it out of step with the host. A client now ignores it,
and the cutscene skip's local revert, which a client only reaches outside
the co-op vote, is the host's or a local game's alone.
The scripts check game_safe_to_save before some cutscenes (the Maw's
bridge). The game's test fails while any enemy sees any player, so with
players spread out a fight elsewhere held up the cutscene a player had
reached. For the scripts in co-op, one player alive, on the ground and
unseen is enough; checkpoints keep the game's own test.
A spot's ground was looked for up to 2.6 m below it, so an extra enemy
could land under a ledge or catwalk, and only walls were in the way, so
it could stand inside a crate or a machine.
A spot now needs a floor within 0.5 m of the starting location's, nothing
in the way from beside the starting location (level, scenery, machines,
vehicles), and 1.6 m of room above its floor.
The campaign scripts only run on the host, against every player's unit,
but some of their habits assumed split-screen:
- volume_test_objects_all on the players waited for every player in the
volume at once: the Maw's bridge cutscene, a30's Pelican pickups. In
co-op one player arriving is enough now.
- Scripts name players as player0 and player1, so everyone past the
second was left out of what they did: Pelican loads (a30's pickups,
insertions), getting out, cutscene teleports and freezes, starting
profiles. Those players now follow player0 (coop_scripts.c).
- A cutscene filmed far from every player (b30's sword Elite at the
shaft door) wasn't active on clients: the cluster the scripts force
active (object_pvs_activate) now rides in the presentation's spare
bytes, and what the host's camera films is sent to clients as often as
what is next to their players.
- A mission the scripts fail (d40's timer, a50's Keyes) only respawned the
players, leaving them in the failure cutscene for good. It now reverts
like the cutscene skip does; everyone dying still respawns at the last
checkpoint. The scripts' game_revert reverts the same way.
The network version is unchanged: the presentation keeps its size, and a
host without the active cluster sends zeroes, which read as none.
Paul Hontz