From d4f1856d357de241320dd6cbf66972c74784c309 Mon Sep 17 00:00:00 2001
From: ne_mene <borna.ozanic@gmail.com>
Date: Thu, 12 Mar 2026 19:56:43 +0100
Subject: hopefully this was a good change

---
 src/phys.lua | 154 +++++++++++++++++++++++++++++------------------------------
 1 file changed, 77 insertions(+), 77 deletions(-)

(limited to 'src/phys.lua')

diff --git a/src/phys.lua b/src/phys.lua
index 8c4455c..3cddd4e 100644
--- a/src/phys.lua
+++ b/src/phys.lua
@@ -17,18 +17,10 @@ world.layers = {}
 --
 -- You can use whatever physics layer you want, but these are the standard ones
 
-local function aabb_x(ax, aw, bx, bw)
-  return ax < bx + bw and bx < ax + aw
-end
-
-local function aabb_y(ay, ah, by, bh)
-  return ay < by + bh and by < ay + ah
-end
-
 local function aabb(ax, ay, aw, ah, bx, by, bw, bh)
   return
-    ax < bx + bw and bx < ax + aw and
-    ay < by + bh and by < ay + ah
+      ax < bx + bw and bx < ax + aw and
+      ay < by + bh and by < ay + ah
 end
 
 local function add_box_to_layers(box)
@@ -44,9 +36,9 @@ phys.Box = {}
 phys.Box.__index = phys.Box
 
 function phys.Box.new(
-  x, y,
-  width, height,
-  opts
+    x, y,
+    width, height,
+    opts
 )
   opts = opts or {}
 
@@ -61,99 +53,107 @@ function phys.Box.new(
   self.width = width
   self.height = height
 
-  self.layers = opts.layers or {"hard"}
+  self.layers = opts.layers or { "hard" }
   self.mask = opts.mask or {}
 
-  self.touching_down = false
-  self.touching_up = false
-  self.touching_vertically = false
-  self.touching_left = false
-  self.touching_right = false
-  self.touching_horizontally = false
+  self.touchx = 0
+  self.touchy = 0
 
   add_box_to_layers(self)
 
   return self
 end
 
-function phys.Box:get_rect()
-  return
-    self.x + self.offsetx,
-    self.y + self.offsety,
-    self.width,
-    self.height
+function phys.Box:touching_left()
+  return self.touchx < 0
 end
 
-function phys.Box:update(velx, vely, dt)
-  local resx = self.x + velx * dt
-  local resy = self.y + vely * dt
+function phys.Box:touching_right()
+  return self.touchx > 0
+end
 
-  local small_side = math.min(self.width, self.height)
-  local steps = math.ceil(vec_len(velx * dt, vely * dt) / small_side)
+function phys.Box:touching_horizontal()
+  return self.touchx ~= 0
+end
 
-  self.touching_down = false
-  self.touching_up = false
-  self.touching_vertically = false
-  self.touching_left = false
-  self.touching_right = false
-  self.touching_horizontally = false
+function phys.Box:touching_up()
+  return self.touchy < 0
+end
 
-  -- this block is fat. much like a certain croatian...
-  for i=1, steps do
-    local p = i / steps
+function phys.Box:touching_down()
+  return self.touchy > 0
+end
 
-    local boxx = resx + self.offsetx + velx * dt * p
-    local boxy = resy + self.offsety + vely * dt * p
+function phys.Box:touching_vertical()
+  return self.touchy ~= 0
+end
 
-    for _, layer in ipairs(self.mask) do
-      for _, other in ipairs(world.layers[layer] or {}) do
-        if other ~= self then
-          local ox = other.x + other.offsetx
-          local oy = other.y + other.offsety
+function phys.Box:touching()
+  return self.touchx ~= 0 and self.touchy ~= 0
+end
 
-          if aabb(
-            boxx, boxy, self.width, self.height,
-            ox, oy, other.width, other.height
+function phys.Box:get_rect()
+  return
+      self.x + self.offsetx,
+      self.y + self.offsety,
+      self.width,
+      self.height
+end
+
+function collision_check(box)
+  local box_x, box_y, box_width, box_height = box:get_rect()
+  local other_x, other_y, other_width, other_height
+
+  for _, layer in ipairs(box.mask) do
+    for _, other in ipairs(world.layers[layer] or {}) do
+      if other == box then
+        goto continue
+      end
+      other_x, other_y, other_width, other_height = other:get_rect()
+
+      if aabb(
+            box_x, box_y, box_width, box_height,
+            other_x, other_y, other_width, other_height
           ) then
-            if aabb_x(self.x + self.offsetx, self.width, ox, other.width) then
-              if vely > 0 then
-                resy = oy - self.height - self.offsety
-                self.touching_down = true
-              else
-                resy = oy + other.height - self.offsety
-                self.touching_up = true
-              end
-              self.touching_vertically = true
-            elseif aabb_y(self.y + self.offsety, self.height, oy, other.height) then
-              if velx > 0 then
-                resx = ox - self.width - self.offsetx
-                self.touching_left = true
-              else
-                resx = ox + other.width - self.offsetx
-                self.touching_right = true
-              end
-              self.touching_horizontally = true
-            end
-          end
-        end
+        return true
       end
+      ::continue::
     end
+  end
+  return false
+end
 
-    if self.touching_horizontally then
+function phys.Box:update(velx, vely, dt)
+  local small_side = math.min(self.width, self.height)
+  local steps = math.ceil(vec_len(velx * dt, vely * dt) / small_side)
+
+  -- this block is fat. much like a certain croatian...
+  -- not anymore :D
+  for i = 1, steps do
+    local p = i / steps
+    local before
+
+    before = self.x
+    self.x = self.x + velx * dt * p
+    if collision_check(self) then
+      self.touchx = velx > 0 and 1 or -1
       velx = 0
+      self.x = before
     end
-    if self.touching_vertically then
+
+    before = self.y
+    self.y = self.y + vely * dt * p
+    if collision_check(self) then
+      self.touchy = velx > 0 and 1 or -1
       vely = 0
+      self.y = before
     end
 
-    if self.touching_horizontally or self.touching_vertically then
+    if self:touching() then
       break
     end
   end
 
-  self.x = resx
-  self.y = resy
-
   return velx, vely
 end
 
-- 
cgit v1.3-2-g0d8e