Death of enemy, obj. removing and other stuff (game added)

[Kreg]

Thanks! I'm going to try it out.
PS. It works!
PS2. There is yet another thing. While this isn't some serious thing, but still noticeable: When I hold down a movement key in directions where I collide with map border and then shot, bullet shows few pixels further than a ship.
ex. I go up and collide with map borders, then I shot - bullet shows above me.

Do I need to make map borders - player collision boolean and then move all fired bullets by x pixels or there is more smart way?

When I put shot code on top of player updating code, then all bullets warps in direction ship moves.

[Luke100000]

Reset the coords after map colliding and then shoot. In the moment you are creating bullets at your old position, the wrong one.

I've found your precise control, put it before colliding, it will work!

This is the code, when I will write it:

Code: Select all

function Movement(dt)
	for i,e in ipairs(playerList) do
		bursttimer = bursttimer + 1 * dt
		xvel=0
		yvel=0
		leftcrush = false
		rightcrush = false
		
		--precise control
		local speed = e.s
		if love.keyboard.isDown("lshift") then
			speed = e.s/2
		end
		
		if love.keyboard.isDown("right") then --if player goes right...
			xvel = speed
			psystem:setLinearAcceleration(-300, -2, 0, 2)
			psystem:setEmissionRate(40)
		elseif love.keyboard.isDown("left") then --if player goes left
			xvel = -speed
			psystem:setLinearAcceleration(-25, -2, 0, 2)
			psystem:setEmissionRate(10)
		else 
			psystem:setLinearAcceleration(-100, -2, 0, 2);psystem:setEmissionRate(15)
		end
		
		-- if player goes down...
		if love.keyboard.isDown("down") then
			yvel = speed
		end
		
		-- if players goes up...
		if love.keyboard.isDown("up") then
			yvel = -speed
		end
		
		--X-collision
		local oldX = e.x
		e.x = e.x + (xvel*dt)
		for i2,e2 in pairs (enemyList) do
			if CheckCollision(e.x,e.y,e.w,e.h, e2.x,e2.y,e2.w,e2.h) == true then
				if e.x <= e2.x then
					e.x=oldX
					leftcrush = true
				end
				if e.x >= e2.x then
					e.x=oldX
					rightcrush = true
				end
				e.x = e.x - e2.s * dt
			end
		end
		
		--Y-collision
		local oldY = e.y
		e.y = e.y + (yvel*dt)
		for i2,e2 in pairs (enemyList) do
			if CheckCollision(e.x,e.y,e.w,e.h, e2.x,e2.y,e2.w,e2.h) == true then
				if e.y <= e2.y then
					e.y=oldY
				end
				if e.y >= e2.y then
					e.y=oldY
				end
			end
		end
		
		-- if crushed, you die
		if rightcrush and leftcrush then e.dead = true end
		if e.HP < 1 then e.dead = true end
		
		-- map collision
		if e.x+e.w >=800 then e.x = oldX end
		if e.x <=0 then e.x = oldX end
		if e.y <= 0 then e.y = oldY end
		if e.y+e.h >= 600 then e.y = oldY end
		
		-- shoot button 
		if love.keyboard.isDown("z") then
			 if bursttimer >= 0.1 then
				for i,e in ipairs(playerList) do
					MakeBullet(e.x+(e.w/2),e.y+(e.h/2),1,'player') end -- place where bullet show
					effect:play()
					effect:rewind()
					bursttimer =0
			end
		end
	end
end

I edited this:
1. insert local variable 'speed' where you can control your speed per tick. I used it for precise control
2. I sort a little bit moving and colliding, doesn't make something, it looks only cleaner
3. Move shooting to the end of the function

Good luck!

[Kreg]

Thank you, this works.
I'm slowly getting to make enemy waypoint system, so enemy could go to given positions.
Enemy class have tx and ty tables, where x and y coordinates are stored. For now, when I click with my left mouse button, it adds it's x position to enemys tx table and y position to ty table, enemy aims to get there, then removes coordinates from tables and take on another position if I clicked with mouse more.

Now I need to invent something, which would give the enemy coordinates at creation. I could use MakeEnemy() and insert coords like this : MakeEnemy(x1,y1 ,x2,y2 ,x3,y3 ,x4,y4 ect), but that would means I will have to set maximum amount of waypoints (like 6, for example), because in creation funtion I have to write down value assigment to table (e.tx[#e.tx + 1]= x1 ; e.tx[#e.tx + 1]= x2 ect.)
But it's minor problem: I can set max 10 waypoints, probably that much won't be used anyway.
Or could work with local variables and make it be used by MakeEnemy() or something...

[Luke100000]

Code: Select all

function MakeEnemy(x, y)
  local e = { }
  e.x = x
  e.y = y
  e.newWaypoint(x, y) = function(self, x, y)
    self.waypoints[#self.waypoints+1] = {x = x, y = y}
  end
  e.waypoints = { }
end

MakeEnemy(10, 20)
enemys[1]:newWaypoint(40, 50)
enemys[1]:newWaypoint(0, 10)

Is this helpful? Should be working.
Now you can add waypoints after creating the enemy too.

[Kreg]

It may give me an idea how to work my code, but there is one thing:

Code: Select all

MakeEnemy(10, 20)
enemys[1]:newWaypoint(40, 50)
enemys[1]:newWaypoint(0, 10)

Doesn't it means I will have to know in what position in "enemys" table object is?

Edit.
Another thing

I try to make function for starting one enemy wave, but when I add check like

Code: Select all

	if first_stage_check == 0 then -- I mean that line
		first_stage()
		first_stage_check = 1
	end 

It doesn't work, but when I remove the check, the code start, spawning thousand of enemies due to lack of control.

I show the part of the code if somebody needed to check:

Code: Select all

--------------------
--in 'spawnplan' file
-------------------
first_stage_check = 0
function first_stage()
	local x = 500
	local y = 540
	for i=1, 5 do
		MakeEnemy(500,600   ,x,y-60, -120,y-40, 0,0, 0,0 ,0,0 ,0,0, 0,0)
		x=x+50;y=y-40
	end
end

-----------
--in main.lua
----------
if first_stage_check == 0 then -- I mean that line
		first_stage()
		first_stage_check = 1
	end 

Edit
I guess I fixed the spawning problem