Add support for custom attack/use binds

This also includes another scope optimisation or two

cl_ui3d2d.lua

@@ -3,27 +3,40 @@ ui3d2d = ui3d2d or {}
 
 do --Input handling
     local getRenderTarget, cursorVisible = render.GetRenderTarget, vgui.CursorVisible
-    local isMouseDown, isKeyDown = input.IsMouseDown, input.IsKeyDown
 
-    local inputEnabled, isPressing, isPressed
+    local inputCount = 0
 
-    hook.Add("PreRender", "ui3d2d.inputHandler", function() --Check the input state before rendering UIs
-        if getRenderTarget() then inputEnabled = false return end
-        if cursorVisible() then inputEnabled = false return end
-
-        inputEnabled = true
+    hook.Add("KeyPress", "ui3d2d.inputHandler", function(ply, key)
+        if key ~= IN_USE and key ~= IN_ATTACK then return end
+        inputCount = inputCount + 1
+    end)
 
-        local wasPressing = isPressing
-        isPressing = isMouseDown(MOUSE_LEFT) or isKeyDown(KEY_E)
-        isPressed = not wasPressing and isPressing
+    hook.Add("KeyRelease", "ui3d2d.inputHandler", function(ply, key)
+        if key ~= IN_USE and key ~= IN_ATTACK then return end
+        inputCount = inputCount - 1
     end)
 
-    function ui3d2d.isPressing() --Returns true if an input is being held
-        return inputEnabled and isPressing
-    end
+    do
+        local inputEnabled, isPressing, isPressed
+
+        hook.Add("PreRender", "ui3d2d.inputHandler", function() --Check the input state before rendering UIs
+            if getRenderTarget() then inputEnabled = false return end
+            if cursorVisible() then inputEnabled = false return end
+
+            inputEnabled = true
 
-    function ui3d2d.isPressed() --Returns true if an input was pressed this frame
-        return inputEnabled and isPressed
+            local wasPressing = isPressing
+            isPressing = inputCount > 0
+            isPressed = not wasPressing and isPressing
+        end)
+
+        function ui3d2d.isPressing() --Returns true if an input is being held
+            return inputEnabled and isPressing
+        end
+
+        function ui3d2d.isPressed() --Returns true if an input was pressed this frame
+            return inputEnabled and isPressed
+        end
     end
 end
 
@@ -94,9 +107,11 @@ do --Rendering context creation and mouse position getters
 
             if isObstructed(eyePos, hitPos, ignoredEntity) then return true end
 
-            local diff = pos - hitPos
-            mouseX = diff:Dot(-angles:Forward()) / scale
-            mouseY = diff:Dot(-angles:Right()) / scale
+            do
+                local diff = pos - hitPos
+                mouseX = diff:Dot(-angles:Forward()) / scale
+                mouseY = diff:Dot(-angles:Right()) / scale
+            end
 
             return true
         end