From 2083374adc2ded636f17946b320a30011501bb86 Mon Sep 17 00:00:00 2001
From: Kazhnuz <kazhnuz@kobold.cafe>
Date: Sat, 2 Nov 2024 09:08:04 +0100
Subject: [PATCH] feat: add a very basic shadow system

---
 framework/scenes/world/actors/init.lua        | 17 +++++++++++++++
 .../scenes/world/actors/physics/init.lua      | 21 +++++++++++++++++++
 .../scenes/world/actors/visuals/init.lua      |  2 +-
 3 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/framework/scenes/world/actors/init.lua b/framework/scenes/world/actors/init.lua
index d480dc8..604b391 100644
--- a/framework/scenes/world/actors/init.lua
+++ b/framework/scenes/world/actors/init.lua
@@ -68,12 +68,29 @@ function Actor:destroy()
 end
 
 function Actor:draw()
+  self:drawShadow()
   self:_drawVisual()
   if (self.def.drawHitboxes == true) then
     self:_drawHitboxes()
   end
 end
 
+function Actor:drawShadow()
+  if (self.world.type ~= "3D" and self.world.drawShadow ~= true) then
+    return
+  end
+  local shadowZ = self:getGroundZ()
+  if (shadowZ == nil) then
+    return
+  end
+
+  local r, g, b, a = love.graphics.getColor( )
+  local x, y = self.position.x + (self.dimensions.w / 2), self.position.y + (3 * self.dimensions.h / 4) - shadowZ
+  love.graphics.setColor(0, 0, 0, .3)
+  love.graphics.ellipse( "fill", math.floor(x), math.floor(y), self.dimensions.w / 2, self.dimensions.w / 4 )
+  love.graphics.setColor(r, g, b, a)
+end
+
 -- Callbacks
 function Actor:onInit()
 
diff --git a/framework/scenes/world/actors/physics/init.lua b/framework/scenes/world/actors/physics/init.lua
index cdada6a..bbb5391 100644
--- a/framework/scenes/world/actors/physics/init.lua
+++ b/framework/scenes/world/actors/physics/init.lua
@@ -184,6 +184,27 @@ function Physics:checkGround()
     end
 end
 
+function Physics:getGroundZ()
+    if (self.world.type ~= "3D") then
+        return 0
+    end
+    -- On check to les acteurs qui pourraient être en dessous
+    local bodiesBehind = self.world:getBodiesInCube(self.position.x, self.position.y, self.position.z - 10000, self.dimensions.w, self.dimensions.h, 10000)
+
+    local z = nil
+    for _, body in ipairs(bodiesBehind) do
+        if (body.type ~= "main" and body.isSolid and body.owner ~= self) then
+            local zToCheck = body.position.z + body.dimensions.d
+            if (z == nil) then
+                z = zToCheck
+            else
+                z = math.max(z, zToCheck)
+            end
+        end
+    end
+    return z
+end
+
 function Physics:_applyCollisionResponses(col)
     if (self.type == "player") and (col.other.owner ~= nil) and (col.other.owner.onPlayerCollision ~= nil) then
         col.other.owner:onPlayerCollision(self, "main", col)
diff --git a/framework/scenes/world/actors/visuals/init.lua b/framework/scenes/world/actors/visuals/init.lua
index 2f4f859..4336da7 100644
--- a/framework/scenes/world/actors/visuals/init.lua
+++ b/framework/scenes/world/actors/visuals/init.lua
@@ -41,7 +41,7 @@ function Visual:_getShapeData()
 
     if (self.world.type == "3D") then
         -- TODO: vérifier si l'algo est bon
-        position.y = position.y - self.dimensions.d - position.z + (self.dimensions.h)
+        position.y = position.y - self.dimensions.d - position.z + (3 * self.dimensions.h / 4)
         dimensions = {
             w = self.dimensions.w,
             h = self.dimensions.h + self.dimensions.d,