Super Mario Bros. X Forums

TheDinoKing432 wrote:Is there a way to check if there's no blocks in a certain coordinate?

Enjl wrote:

TheDinoKing432 wrote:Is there a way to check if there's no blocks in a certain coordinate?

Block.getIntersecting(number x1, number y1, number x2, number y2)

TheDinoKing432 wrote:

Enjl wrote:

TheDinoKing432 wrote:Is there a way to check if there's no blocks in a certain coordinate?

Block.getIntersecting(number x1, number y1, number x2, number y2)

Thanks.
Also, is there a way to make an enemy spawn anywhere inside the screen?

zlakergirl357 wrote:I've this drawn image on screen and I want it to be kept being drawn on screen whenever a message box is open since it disappears whenever one pops up.

Fennor wrote:

Code: Select all

local Timer = 120

function onLoop()
	if Timer == 60 then
		for k,v in pairs(NPC.get(1, player.section)) do	
			v.id = 2; 
			Timer = Timer -1
		end	
	else
		if Timer == 0 then
			for k,v in pairs(NPC.get(2, player.section)) do	
				v.id = 1
				Timer = 120
			end
		else
			Timer = Timer -1 
		end
	end			
end	

This turns a brown Goomba into a Red Goomba after 1 second, and back to a brown one after another second.

local pnpc = API.load(pnpc) -- pnpc is to store a value for the timer for each NPC

function onTick()
	for k,v in ipairs(NPC.get({1,2}, player.section)) do
		local w = pnpc.wrap(v) --wraps the npc into pnpc or returns a pnpc object if it has been already wrapped
		if w.data.timer == nil then --initiate timer
			w.data.timer = 1
		end
		if w.data.timer%64 == 0 then --or 65, depends on how you want to measure seconds. This is true every 64 ticks.
			if w.id == 1 then
				w.id = 2
			else
				w.id = 1
			end
		end
		w.data.timer = w.data.timer + 1 --you could add a check to see if the npc is onscreen.
	end
end

Fennor wrote: For chasing it depends what you want. You could even make a very smart chaser who tries to fly where you will be in a few seconds, not where you are. For normal chasing you need to compare the position of the enemy to the position of the player. Like:

Code: Select all

if player.x <= v.x then
     v.speedX = -1
else
     v.speedX = 1     
end

The enemy will go left when the player xposition is lower than the xposition of the enemy, in other words if the player is further to the left, otherwise it will go right. This is would not look very smooth, though. Because he would go from going left to right instantly after passing you. Instead you would probably want to give him some sort of acceleration. For that you would have to write v.speedX = v.speedX -0.1 instead.(or +0.1 when he is going right)

local playerCenter = player.x + 0.5 * player.width
for k,v blah do
	local enemyCenter = v.x + 0.5*v.width
	if enemyCenter > playerCenter then
		v.x = v.x + 1
	else --be aware that this will also trigger when the two coordinates are the same
		v.x = v.x - 1
	end
end

Enjl wrote:Besides, you're checking for the upper left corner of the NPC and player.

for k,v1 in pairs(NPC.get(209, player.section)) do
	for k,v2 in pairs(NPC.get(260, player.section)) do
		NPC.spawn(260, v1.x + (0.5 * v1.width) - (0.5 * v2.width), v1.y , player.section)			
	end
end