Pulp how-to: two-tile-tall player

Pulp
10

I've been using this for my project and I thought I'd post a few additions I've made to it.

My code allows the player to go partially 'behind' foreground objects, as well as animates their movement a tiny bit.

on enter do
	// the calculateMove function sets the head's position, and we want that to
	// be drawn even before the player moves in a new room; as soon as they enter
	call "calculateMove"
end

on update do
	// we abstracted the movement calculation into the calculateMove function
	// because it needs to be called more than once here
	call "calculateMove"
	
	// change player's facing position
	
	// horizontal movement
	if event.dx<0 then // if the attempted movement on the X axis was negative
		playerDirection = "left" // save this so we can use it
	elseif event.dx>0 then
		// same basic logic as above
		playerDirection = "right"
	end
	
	// Check if the player is behind any foreground objects
	call "checkisbehind"
	
	// Make the character play a walking animation if they aren't behind anything
	call "makewalk"
	
end

on draw do
	// the "player" (the feet) gets drawn automatically;
	// here, we manually draw the tile called "player head"
	draw "player head {playerDirection}" at playerHeadX,playerHeadY
end

on checkisbehind do
	// check if the player is going behind something
	
	// first set a 'isbehind' variable to 0. If we find he is behind something, set it to 1.
	// this is used to stop the code below overwriting what we are doing here.
	
	isbehind = 0
	thetile = name event.px,event.py
	
	if thetile=="outer wall h" then
		swap "outer wall h"
		isbehind = 1
	elseif thetile=="table top left" then
		swap "player {playerDirection} table top left"
		isbehind = 1
	elseif thetile=="table top mid" then
		swap "player {playerDirection} table top mid"
		isbehind = 1
	elseif thetile=="table top right" then
		swap "player {playerDirection} table top right"
		isbehind = 1
	elseif thetile=="tv top left" then
		swap "player {playerDirection} tv top left"
		isbehind = 1
	elseif thetile=="tv top mid" then
		swap "player {playerDirection} tv top mid"
		isbehind = 1
	elseif thetile=="tv top right" then
		swap "player {playerDirection} tv top right"
		isbehind = 1
	elseif thetile=="inner wall top" then
		swap "player {playerDirection} inner wall top"
		isbehind = 1
	elseif thetile=="inner wall top left" then
		swap "player {playerDirection} inner wall top left"
		isbehind = 1
	elseif thetile=="inner wall top right" then
		swap "player {playerDirection} inner wall top right"
		isbehind = 1
	elseif thetile=="umbrella stand top" then
		swap "player {playerDirection} umbrella stand top"
		isbehind = 1
	end
end

on makewalk do
	if isbehind==0 then
		swap "player walk {playerDirection}"
		// then, switch to static image
		keeptile = thetile
		wait 0.1 then
			if keeptile==thetile then
				swap "player {playerDirection}"
			end
		end
	end
end

on calculateMove do
	playerHeadX = event.px // event.px is where the player moved
	playerHeadY = event.py
	playerHeadY -= 1 // the head is one tile above
end
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