Miscellaneous fixes to piece behavior in addition to fixing prev. commit

This reverts commit d18c3e298d.

scene/game.lua

@@ -45,7 +45,9 @@ function GameScene:render()
 	self.game:drawBackground()
 	self.game:drawFrame()
 	self.game:drawGrid()
-	if self.game.lcd > 0 then self.game:drawLineClearAnimation() end
+	if self.game:canDrawLCA() then
+		self.game:drawLineClearAnimation()
+	end
 	self.game:drawPiece()
 	self.game:drawNextQueue(self.ruleset)
 	self.game:drawScoringInfo()

tetris/modes/gamemode.lua

@@ -156,9 +156,6 @@ function GameMode:update(inputs, ruleset)
 		if self.enable_hold and inputs["hold"] == true and self.held == false and self.prev_inputs["hold"] == false then
 			self:hold(inputs, ruleset)
 			self.prev_inputs = inputs
-			if not self.grid:canPlacePiece(self.piece) then
-				self.game_over = true
-			end
 			return
 		end
 
@@ -498,6 +495,10 @@ function GameMode:initializeOrHold(inputs, ruleset)
 	if not self.grid:canPlacePiece(self.piece) then
 		self.game_over = true
 	end
+	ruleset:dropPiece(
+		inputs, self.piece, self.grid, self:getGravity(),
+		self:getDropSpeed(), self.drop_locked, self.hard_drop_locked
+	)
 end
 
 function GameMode:hold(inputs, ruleset, ihs)
@@ -522,17 +523,19 @@ function GameMode:hold(inputs, ruleset, ihs)
 	if ihs then playSE("ihs")
 	else playSE("hold") end
 	self:onHold()
+	if not self.grid:canPlacePiece(self.piece) then
+		self.game_over = true
+	end
 end
 
 function GameMode:initializeNextPiece(inputs, ruleset, piece_data, generate_next_piece)
 	self.piece_hard_dropped = false
 	self.piece_soft_locked = false
-	local gravity = self:getGravity()
 	self.piece = ruleset:initializePiece(
-		inputs, piece_data, self.grid, gravity,
+		inputs, piece_data, self.grid, self:getGravity(),
 		self.prev_inputs, self.move,
 		self:getLockDelay(), self:getDropSpeed(),
-		self.lock_drop, self.lock_hard_drop, self.big_mode,
+		self.drop_locked, self.hard_drop_locked, self.big_mode,
 		(
 			self.frames == 0 or (ruleset.are and self:getARE() ~= 0)
 		) and self.irs or false
@@ -607,6 +610,10 @@ function GameMode:animation(x, y, skin, colour)
 	}
 end
 
+function GameMode:canDrawLCA()
+	return self.lcd > 0
+end
+
 function GameMode:drawLineClearAnimation()
 	-- animation function
 	-- params: block x, y, skin, colour

tetris/rulesets/ruleset.lua

@@ -221,16 +221,7 @@ function Ruleset:initializePiece(
 		colours = self.colourscheme
 	end
 	
-	local spawn_x
-	if (grid.width ~= 10) then
-		local percent = spawn_positions[data.shape].x / 10
-		for i = grid.width - 1, 0, -1 do
-			if i / grid.width <= percent then
-				spawn_x = i
-				break
-			end
-		end
-	end
+	local spawn_x = math.floor(spawn_positions[data.shape].x / 10 * grid.width)
 
 	local spawn_dy
 	if (config.gamesettings.spawn_positions == 1) then
@@ -275,9 +266,9 @@ function Ruleset:processPiece(
 
 	if synchroes_allowed then
 		self:rotatePiece(inputs, piece, grid, prev_inputs, false)
-		self:movePiece(piece, grid, move, gravity >= 20)
+		self:movePiece(piece, grid, move, gravity >= grid.height - 4)
 	else
-		self:movePiece(piece, grid, move, gravity >= 20)
+		self:movePiece(piece, grid, move, gravity >= grid.height - 4)
 		self:rotatePiece(inputs, piece, grid, prev_inputs, false)
 	end
 	self:dropPiece(