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function is_colliding(a, b)
ax1, bx1 = a.position.x, b.position.x
ax2, bx2 = ax1 + SPRITE_DIMS.x, bx1 + SPRITE_DIMS.y
ay1, by1 = a.position.y, b.position.y
ay2, by2 = ay1 + SPRITE_DIMS.y, by1 + SPRITE_DIMS.x
return (ax1 < bx2 and ax2 > bx1
and ay1 < by2 and ay2 > by1)
end
function handle_collision(a, b)
if a.entity_type == Entities.Sword and b.entity_type == Entities.Player and b.equipped[a.id] == nil then
b:equip(a)
return
end
if a.damage and b.health then
if b:is_in_iframe() then
return
end
b:take_damage(a.line_of_sight, a.damage)
end
end
function run_collisions()
collidable = filter(_World, function(e) return e.collision end)
for _ai, a in pairs(collidable) do
for _bi, b in pairs(collidable) do
if a.id == b.id then
goto continue
end
if is_colliding(a, b) then
handle_collision(a, b)
end
::continue::
end
end
end
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