Help about my code [SOLVED]

[test]

I couldn't figure out. what is the error?

Code: Select all

local w
local h
local p = {}
p[1] = {}
p[2] = {}
p[1].slot = {}
p[1].slot[1] = {}
p[1].slot[2] = {}
p[1].slot[3] = {}
p[1].slot[4] = {}
p[2].slot = {}
p[2].slot[1] = {}
p[2].slot[2] = {}
p[2].slot[3] = {}
p[2].slot[4] = {}
local spell = {}
spell[1] = {}
spell[2] = {}
spell[3] = {}
spell[4] = {}
spell[5] = {}
local p = {}
p[1] = {}
p[2] = {}
function love.load()
	w, h = love.graphics.getDimensions()
	p[1].x = w / 4
	p[2].x = 3 * w / 4
	spell[1].img = love.graphics.newImage('watersplash.png')
	spell[2].img = love.graphics.newImage('darkness.png')
	spell[3].img = love.graphics.newImage('fireball.png')
	spell[4].img = love.graphics.newImage('poisondrop.png')
	spell[5].img = love.graphics.newImage('lightning.png')
	for i = 1, 2 do
		p[i].img = love.graphics.newImage('p.png')
		p[i].y = h / 2
		p[i].w = p[i].img:getWidth()
		p[i].h = p[i].img:getHeight()
		p[i].xx = p[i].x
		p[i].yy = p[i].y
		p[i].slot[1] = spell[love.math.random(1, #spell)]
		p[i].slot[2] = spell[love.math.random(1, #spell)]
		p[i].slot[3] = spell[love.math.random(1, #spell)]
		p[i].slot[4] = spell[love.math.random(1, #spell)]
	end
end
function love.update(dt)
	local touches = love.touch.getTouches()
	for i, id in ipairs(touches) do
		local x, y = love.touch.getPosition(id)
		if x < w / 2 then
			if x > 150 then
				p[1].xx = x
				p[1].yy = y
			end
		else
			if x < w - 150 then
				p[2].xx = x
				p[2].yy = y
			end
		end
	end
	for i = 1, 2 do
		local distance = math.dist(p[i].x, p[i].y, p[i].touch.x, p[i].touch.y)
		local stepSize = p[i].speed * dt

		if distance > stepSize then
			p[i].x = p[i].x + (p[i].touch.x - p[i].x) / distance * stepSize
			p[i].y = p[i].y + (p[i].touch.y - p[i].y) / distance * stepSize
		end
	end
end
function love.draw()
	love.graphics.draw(p[1].slot[1].img, 0, 0)
	love.graphics.draw(p[1].slot[2].img, 0, 200)
	love.graphics.draw(p[1].slot[3].img, 0, 400)
	love.graphics.draw(p[1].slot[4].img, 0, 600)
	love.graphics.draw(p[2].slot[1].img, w - 200, h - 200)
	love.graphics.draw(p[2].slot[2].img, w -200, h - 400)
	love.graphics.draw(p[2].slot[3].img, w - 200, h - 600)
	love.graphics.draw(p[2].slot[4].img, w - 200, h - 800)
end

[grump]

The most glaring error is that you did not ask a real question.

At least have the courtesy to mention what error you're trying to solve and how it differs from the expected result. And if possible at all, please post something that can be analyzed with minimum effort. A love file that shows the error is a good starting point to get useful answers. Guesswork sucks.

[raidho36]

First, you overwrite p[1] and p[2] with a pair of empty tables after defining p[1] and p[2] to contain slots and everything. Second, you never write "touch" field to p[i] so when you try to read it, it's nil.

[test]

I solved the errors.

Code: Select all

local w
local h
local p = {}
p[1] = {}
p[2] = {}
p[1].slot = {}
p[1].slot[1] = {}
p[1].slot[2] = {}
p[1].slot[3] = {}
p[1].slot[4] = {}
p[2].slot = {}
p[2].slot[1] = {}
p[2].slot[2] = {}
p[2].slot[3] = {}
p[2].slot[4] = {}
local spell = {}
spell[1] = {}
spell[2] = {}
spell[3] = {}
spell[4] = {}
spell[5] = {}
spell[6] = {}
function love.load()
	w, h = love.graphics.getDimensions()
	p[1].x = w / 4
	p[2].x = 3 * w / 4
	spell[1].img = love.graphics.newImage('watersplash.png')
	spell[2].img = love.graphics.newImage('darkness.png')
	spell[3].img = love.graphics.newImage('fireball.png')
	spell[4].img = love.graphics.newImage('poisondrop.png')
	spell[5].img = love.graphics.newImage('lightning.png')
	spell[6].img = love.graphics.newImage('speed.png')
	for i = 1, 2 do
		p[i].img = love.graphics.newImage('p.png')
		p[i].y = h / 2
		p[i].w = p[i].img:getWidth()
		p[i].h = p[i].img:getHeight()
		p[i].xx = p[i].x
		p[i].yy = p[i].y
		p[i].v = 750
		for ii = 1, 4 do
			p[i].slot[ii] = spell[love.math.random(1, #spell)]
		end
		for ii = 1, 4 do
			if p[i].slot[ii] == spell[6] then
				p[i].v = p[i].v * 2
				break
			end
		end
	end
end
function love.update(dt)
	local touches = love.touch.getTouches()
	for i, id in ipairs(touches) do
		local x, y = love.touch.getPosition(id)
		if x < w / 2 then
			if x > 150 then
				p[1].xx = x
				p[1].yy = y
			end
		else
			if x < w - 150 then
				p[2].xx = x
				p[2].yy = y
			end
		end
	end
	for i = 1, 2 do
		local distance = math.dist(p[i].x, p[i].y, p[i].xx, p[i].yy)
		local stepSize = p[i].v * dt

		if distance > stepSize then
			p[i].x = p[i].x + (p[i].xx - p[i].x) / distance * stepSize
			p[i].y = p[i].y + (p[i].yy - p[i].y) / distance * stepSize
		end
	end
end
function love.draw()
	for i = 1, 2 do
		love.graphics.draw(p[i].img, p[i].x, p[i].y)
	end
	love.graphics.draw(p[1].slot[1].img, 0, 0)
	love.graphics.draw(p[1].slot[2].img, 0, 200)
	love.graphics.draw(p[1].slot[3].img, 0, 400)
	love.graphics.draw(p[1].slot[4].img, 0, 600)
	love.graphics.draw(p[2].slot[1].img, w - 200, h - 200)
	love.graphics.draw(p[2].slot[2].img, w -200, h - 400)
	love.graphics.draw(p[2].slot[3].img, w - 200, h - 600)
	love.graphics.draw(p[2].slot[4].img, w - 200, h - 800)
end

function math.dist(x1, y1, x2, y2) return ((x2 - x1) ^ 2 + (y2 - y1) ^ 2) ^ 0.5 end