LÖVE

Posted: **Wed May 15, 2013 9:46 pm**

So I've been building this small game for fun, 3 bricks fall at randomly selected coordinates that you then have to click with your mouse to "save" them from falling
so i need some code to put in here:

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function love.mousepressed()

end

so that when i click on my three blocks:

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objects.enemy.body
objects.enemy2.body
objects.enemy3.body

they will be saved and the player will be awarded a point.

I began coding in C# so i thought i could just borrow and convert some code i did in a different project that did the same thing i need done here:

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private void Form1_MouseDown(object sender, MouseEventArgs e)
        {

            int x = 40;
            int y = 40;
            int diffX = e.X - buttonRec.X;
            int diffY = e.Y - buttonRec.Y - 10;

            double diff = Math.Sqrt((diffX * diffX) - (diffY * diffY));

            if (diff <= x && diff <= y)
            {
                score++;
                labelscore.Text = score.ToString();
            }
        }

for those who don't code C# this basically finds the distance between the mouse click and the image that moves around on screen, and if the click is within the image you get one point.

but sadly i couldn't get it to work.

And for good measure ill include the main.lua code so you can get the whole view:(i know the codes a little rough, i plan on cleaning it up later though)

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function love.load()
	love.physics.setMeter(64)
	world = love.physics.newWorld(0, 9.81 * 64, true)

	objects = {}

	objects.enemy = {}

	objects.enemy.body = love.physics.newBody(world, 650/2, 650/5, "dynamic")
	objects.enemy.shape = love.physics.newRectangleShape(0, 0, 50, 100)
	objects.enemy.fixture = love.physics.newFixture(objects.enemy.body, objects.enemy.shape, 2)
	
	objects.enemy2 = {}
	
	objects.enemy2.body = love.physics.newBody(world, 650/3, 650/5, "dynamic")
	objects.enemy2.shape = love.physics.newRectangleShape(0, 0, 50, 100)
	objects.enemy2.fixture = love.physics.newFixture(objects.enemy2.body, objects.enemy2.shape, 2)
	
	objects.enemy3 = {}
	
	objects.enemy3.body = love.physics.newBody(world, 600, 650/5, "dynamic")
	objects.enemy3.shape = love.physics.newRectangleShape(0, 0, 50, 100)
	objects.enemy3.fixture = love.physics.newFixture(objects.enemy3.body, objects.enemy3.shape, 2)

	font = love.graphics.newFont(20)

	recSaved = 0
	
	thetime = 0
	
	
--graphic setup
love.graphics.setBackgroundColor(104, 136, 248)-- set background color to blue
love.graphics.setMode(650, 650, false, true, 0)-- window dimensions to 650 by 650, no full screen, vsync on, no antialiasing
end


function love.update(dt)
	world:update(dt)
	
	if objects.enemy.body:getY() > 770 then
		newSpawnX = math.random(50, 600)
		
		if newSpawnX > 100 then
			newSpawnX2 = math.random(50 + 100, 600)
		elseif newSpawnX < 550 then
			newSpawnX2 = math.random(50, 450)
		else 
			newSpawnX2 = math.random(50, 600)
		end
		
		newSpawnX3 = math.random(50, 600)
		
		objects.enemy.body:setPosition(newSpawnX, 650/5)
		objects.enemy.body:setLinearVelocity(0,0)
		
		objects.enemy2.body:setPosition(newSpawnX2, 650/5)
		objects.enemy2.body:setLinearVelocity(0,0)
		
		
		objects.enemy3.body:setPosition(newSpawnX3, 650/5)
		objects.enemy3.body:setLinearVelocity(0,0)
		
	end
end


function love.keypressed(key)
	if key == "down" then
		recSaved = recSaved + 1
		newSpawnX = math.random(50, 600)
		newSpawnX2 = math.random(50, 600)
		newSpawnX3 = math.random(50, 600)
		objects.enemy.body:setPosition(newSpawnX, 650/5)
		objects.enemy.body:setLinearVelocity(0,0)
		
		objects.enemy2.body:setPosition(newSpawnX2, 650/5)
		objects.enemy2.body:setLinearVelocity(0,0)
		
		objects.enemy3.body:setPosition(newSpawnX3, 650/5)
		objects.enemy3.body:setLinearVelocity(0,0)
		
	end
end

function love.mousepressed()

	
end

function love.draw()
	love.graphics.setColor(72, 260, 14)--set drawing color for ground to green
	love.graphics.polygon("fill", objects.enemy.body:getWorldPoints(objects.enemy.shape:getPoints()))
	
	love.graphics.setColor(72, 260, 14)--set drawing color for ground to green
	love.graphics.polygon("fill", objects.enemy2.body:getWorldPoints(objects.enemy2.shape:getPoints()))
	
	love.graphics.setColor(72, 260, 14)--set drawing color for ground to green
	love.graphics.polygon("fill", objects.enemy3.body:getWorldPoints(objects.enemy3.shape:getPoints()))
	
	love.graphics.setColor(0, 255, 0, 255)
	love.graphics.setFont(font)
	love.graphics.print("Rectangles Save: " .. recSaved, 25, 25)
	
	
	love.graphics.setColor(72, 260, 14)
	love.graphics.setFont(font)
	love.graphics.print("Timer: " .. thetime, 500, 25)
end

Any help or advice would be helpful, thank you.

Posted: **Thu May 16, 2013 1:49 pm**

I'm not sure what you're trying to do. But if you want to check if you're clicking on a block then we need to know the following things:

Is the x-position of the mouse further to the right, than the left side of the object?
Is the x-position of the mouse further to the left, than the right side of the object?
Is the Y-position of the mouse further to the bottom than the top side of the object?
Is the Y-position of the mouse further to the top than the bottom side of the object?

If yes, then that means your mouse is inside the object, and thus you're clicking it.

LÖVE

Need help finding an algorithm to see of click is on a block

Need help finding an algorithm to see of click is on a block

Re: Need help finding an algorithm to see of click is on a b