harper
62 lines
1.1 KiB
Lua
62 lines
1.1 KiB
Lua
collision = {}
|
|
collision.colliders = {}
|
|
|
|
collision.debug = false
|
|
|
|
function collision.draw()
|
|
for _, v in pairs(collision.colliders) do
|
|
gfx.rect(v.x, v.y, v.w, v.h, gfx.COLOR_BLUE)
|
|
end
|
|
end
|
|
|
|
function collision.add(tbl)
|
|
table.insert(collision.colliders, tbl)
|
|
end
|
|
|
|
function collision.remove(index)
|
|
table.remove(collision.colliders, index)
|
|
end
|
|
|
|
function collision.move(aabb, dx, dy)
|
|
local normal = { x = 0, y = 0 }
|
|
if aabb.normal ~= nil then
|
|
aabb.normal = normal
|
|
end
|
|
|
|
-- move x
|
|
aabb.x = aabb.x + dx
|
|
|
|
for _, v in pairs(collision.colliders) do
|
|
if aabb ~= v and collision.aabb_check(aabb, v) then
|
|
if dx > 0 then
|
|
aabb.x = v.x - aabb.w
|
|
normal.x = -1
|
|
elseif dx < 0 then
|
|
aabb.x = v.x + v.w
|
|
normal.x = 1
|
|
end
|
|
end
|
|
end
|
|
|
|
-- move y
|
|
aabb.y = aabb.y + dy
|
|
|
|
for _, v in pairs(collision.colliders) do
|
|
if aabb ~= v and collision.aabb_check(aabb, v) then
|
|
if dy > 0 then
|
|
aabb.y = v.y - aabb.h
|
|
normal.y = -1
|
|
elseif dy < 0 then
|
|
aabb.y = v.y + v.h
|
|
normal.y = 1
|
|
end
|
|
end
|
|
end
|
|
|
|
return normal
|
|
end
|
|
|
|
function collision.aabb_check(a, b)
|
|
return a.x < b.x + b.w and b.x < a.x + a.w and a.y < b.y + b.h and b.y < a.y + a.h
|
|
end
|