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Polaris/code/modules/mob/freelook/chunk.dm
Kelenius acc78a8000 Changes types of ghosts and eyes
``/mob/dead/observer`` -> ``/mob/observer/dead``
``/mob/eye`` -> ``/mob/observer/eye``

Reason being that they are similar in that they both don't interact with
the world in any way. Some procs were shared, some checks as well, and
it overall makes more sense this way. Plus, there were no ``/mob/dead``
mobs.
2016-02-20 15:36:05 +03:00

147 lines
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#define UPDATE_BUFFER 25 // 2.5 seconds
// CHUNK
//
// A 16x16 grid of the map with a list of turfs that can be seen, are visible and are dimmed.
// Allows the Eye to stream these chunks and know what it can and cannot see.
/datum/obfuscation
var/icon = 'icons/effects/cameravis.dmi'
var/icon_state = "black"
/datum/chunk
var/list/obscuredTurfs = list()
var/list/visibleTurfs = list()
var/list/obscured = list()
var/list/turfs = list()
var/list/seenby = list()
var/visible = 0
var/changed = 0
var/updating = 0
var/x = 0
var/y = 0
var/z = 0
var/datum/obfuscation/obfuscation = new()
// Add an eye to the chunk, then update if changed.
/datum/chunk/proc/add(mob/observer/eye/eye)
if(!eye.owner)
return
eye.visibleChunks += src
if(eye.owner.client)
eye.owner.client.images += obscured
visible++
seenby += eye
if(changed && !updating)
update()
// Remove an eye from the chunk, then update if changed.
/datum/chunk/proc/remove(mob/observer/eye/eye)
if(!eye.owner)
return
eye.visibleChunks -= src
if(eye.owner.client)
eye.owner.client.images -= obscured
seenby -= eye
if(visible > 0)
visible--
// Called when a chunk has changed. I.E: A wall was deleted.
/datum/chunk/proc/visibilityChanged(turf/loc)
if(!visibleTurfs[loc])
return
hasChanged()
// Updates the chunk, makes sure that it doesn't update too much. If the chunk isn't being watched it will
// instead be flagged to update the next time an AI Eye moves near it.
/datum/chunk/proc/hasChanged(var/update_now = 0)
if(visible || update_now)
if(!updating)
updating = 1
spawn(UPDATE_BUFFER) // Batch large changes, such as many doors opening or closing at once
update()
updating = 0
else
changed = 1
// The actual updating.
/datum/chunk/proc/update()
set background = 1
var/list/newVisibleTurfs = new()
acquireVisibleTurfs(newVisibleTurfs)
// Removes turf that isn't in turfs.
newVisibleTurfs &= turfs
var/list/visAdded = newVisibleTurfs - visibleTurfs
var/list/visRemoved = visibleTurfs - newVisibleTurfs
visibleTurfs = newVisibleTurfs
obscuredTurfs = turfs - newVisibleTurfs
for(var/turf in visAdded)
var/turf/t = turf
if(t.obfuscations[obfuscation.type])
obscured -= t.obfuscations[obfuscation.type]
for(var/eye in seenby)
var/mob/observer/eye/m = eye
if(!m || !m.owner)
continue
if(m.owner.client)
m.owner.client.images -= t.obfuscations[obfuscation.type]
for(var/turf in visRemoved)
var/turf/t = turf
if(obscuredTurfs[t])
if(!t.obfuscations[obfuscation.type])
t.obfuscations[obfuscation.type] = image(obfuscation.icon, t, obfuscation.icon_state, OBFUSCATION_LAYER)
obscured += t.obfuscations[obfuscation.type]
for(var/eye in seenby)
var/mob/observer/eye/m = eye
if(!m || !m.owner)
seenby -= m
continue
if(m.owner.client)
m.owner.client.images += t.obfuscations[obfuscation.type]
/datum/chunk/proc/acquireVisibleTurfs(var/list/visible)
// Create a new camera chunk, since the chunks are made as they are needed.
/datum/chunk/New(loc, x, y, z)
// 0xf = 15
x &= ~0xf
y &= ~0xf
src.x = x
src.y = y
src.z = z
for(var/turf/t in range(10, locate(x + 8, y + 8, z)))
if(t.x >= x && t.y >= y && t.x < x + 16 && t.y < y + 16)
turfs[t] = t
acquireVisibleTurfs(visibleTurfs)
// Removes turf that isn't in turfs.
visibleTurfs &= turfs
obscuredTurfs = turfs - visibleTurfs
for(var/turf in obscuredTurfs)
var/turf/t = turf
if(!t.obfuscations[obfuscation.type])
t.obfuscations[obfuscation.type] = image(obfuscation.icon, t, obfuscation.icon_state, OBFUSCATION_LAYER)
obscured += t.obfuscations[obfuscation.type]
#undef UPDATE_BUFFER