mirror of
https://github.com/bakpakin/tiny-ecs.git
synced 2026-07-21 23:56:50 -06:00
146 lines
3.9 KiB
Lua
146 lines
3.9 KiB
Lua
local jojo = require "jojo"
|
|
|
|
local World = jojo.World
|
|
local Aspect = jojo.Aspect
|
|
local System = jojo.System
|
|
|
|
-- Taken from answer at http://stackoverflow.com/questions/640642/how-do-you-copy-a-lua-table-by-value
|
|
local function deep_copy(o, seen)
|
|
seen = seen or {}
|
|
if o == nil then return nil end
|
|
if seen[o] then return seen[o] end
|
|
|
|
local no
|
|
if type(o) == 'table' then
|
|
no = {}
|
|
seen[o] = no
|
|
|
|
for k, v in next, o, nil do
|
|
no[deep_copy(k, seen)] = deep_copy(v, seen)
|
|
end
|
|
setmetatable(no, deep_copy(getmetatable(o), seen))
|
|
else -- number, string, boolean, etc
|
|
no = o
|
|
end
|
|
return no
|
|
end
|
|
|
|
local entityTemplate1 = {
|
|
xform = {x = 0, y = 0},
|
|
vel = {x = 1, y = 2},
|
|
name = "E1",
|
|
size = 11,
|
|
description = "It goes to 11.",
|
|
spinalTap = true
|
|
}
|
|
|
|
local entityTemplate2 = {
|
|
xform = {x = 2, y = 2},
|
|
vel = {x = -1, y = 0},
|
|
name = "E2",
|
|
size = 10,
|
|
description = "It does not go to 11."
|
|
}
|
|
|
|
local entityTemplate3 = {
|
|
xform = {x = 4, y = 5},
|
|
vel = {x = 0, y = 3},
|
|
name = "E3",
|
|
size = 8,
|
|
description = "The smallest entity."
|
|
}
|
|
|
|
describe('Jojo:', function()
|
|
|
|
describe('Aspect:', function()
|
|
|
|
local entity1, entity2, entity3
|
|
|
|
before_each(function()
|
|
entity1 = deep_copy(entityTemplate1)
|
|
entity2 = deep_copy(entityTemplate2)
|
|
entity3 = deep_copy(entityTemplate3)
|
|
end)
|
|
|
|
it("Correctly match Aspects and Entities", function()
|
|
|
|
local atap = Aspect({"spinalTap"})
|
|
local avel = Aspect({"vel"})
|
|
local axform = Aspect({"xform"})
|
|
local aall = Aspect({})
|
|
local aboth = Aspect.compose(atap, axform)
|
|
local amove = Aspect.compose(axform, avel)
|
|
|
|
assert.truthy(atap:matches(entity1))
|
|
assert.falsy(atap:matches(entity2))
|
|
assert.truthy(axform:matches(entity1))
|
|
assert.truthy(axform:matches(entity2))
|
|
assert.truthy(aboth:matches(entity1))
|
|
assert.falsy(aboth:matches(entity2))
|
|
|
|
end)
|
|
|
|
end)
|
|
|
|
describe('World:', function()
|
|
|
|
local world, entity1, entity2, entity3
|
|
|
|
local moveSystem = System(
|
|
nil,
|
|
function(e, dt)
|
|
local xform = e.xform
|
|
local vel = e.vel
|
|
local x, y = xform.x, xform.y
|
|
local xvel, yvel = vel.x, vel.y
|
|
xform.x, xform.y = x + xvel * dt, y + yvel * dt
|
|
end,
|
|
Aspect({"xform", "vel"})
|
|
)
|
|
|
|
local timePassed = 0
|
|
local oneTimeSystem = System(
|
|
function(dt)
|
|
timePassed = timePassed + dt
|
|
end
|
|
)
|
|
|
|
before_each(function()
|
|
entity1 = deep_copy(entityTemplate1)
|
|
entity2 = deep_copy(entityTemplate2)
|
|
entity3 = deep_copy(entityTemplate3)
|
|
world = World(moveSystem, oneTimeSystem, entity1, entity2, entity3)
|
|
timePassed = 0
|
|
end)
|
|
|
|
it("Create World", function()
|
|
assert.equals(world.entityCount, 3)
|
|
assert.equals(world.systemCount, 2)
|
|
end)
|
|
|
|
it("Run simple simulation", function()
|
|
world:update(1)
|
|
assert.equals(timePassed, 1)
|
|
assert.equals(entity1.xform.x, 1)
|
|
assert.equals(entity1.xform.y, 2)
|
|
end)
|
|
|
|
it("Remove Entities", function()
|
|
world:remove(entity1, entity2)
|
|
world:update(1)
|
|
assert.equals(timePassed, 1)
|
|
assert.equals(entity1.xform.x, entityTemplate1.xform.x)
|
|
assert.equals(entity2.xform.x, entityTemplate2.xform.x)
|
|
assert.equals(entity3.xform.y, 8)
|
|
end)
|
|
|
|
it("Remove Systems", function()
|
|
world:remove(oneTimeSystem, moveSystem)
|
|
world:update(1)
|
|
assert.equals(timePassed, 0)
|
|
assert.equals(entity1.xform.x, entityTemplate1.xform.x)
|
|
end)
|
|
end)
|
|
|
|
end)
|