luaecs/test3.lua at master · cloudwu/luaecs · GitHub

46 lines (34 loc) · 694 Bytes

local ecs = require "ecs"

local w = ecs.world()

w:register {

name = "value",

type = "int",

}

w:register {

name = "2x"

}

w:register {

name = "3x"

}

w:register {

name = "tag"

}

for i = 1, 20 do

w:new {

value = i,

["2x"] = (i % 2 == 0),

["3x"] = (i % 3 == 0),

}

end

w:filter("tag", "value 2x 3x:absent") -- filter the value is 2x and not 3x

for v in w:select "tag value:in" do

print("2x", v.value)

end

w:filter("tag", "value 2x:absent 3x") -- filter the value is 3x and not 2x

for v in w:select "tag value:in" do

print("3x", v.value)

end

w:filter("tag", "value 2x", true) -- filter add the value is 2x

for v in w:select "tag value:in" do

print("3x or 2x", v.value)

end

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