CODEWITHSUNDEEP
lualove2d
Dré Ellis
Dré Ellis

Reputation: 33

How Do I Use A Targeted Mouse-Click Function with Love2D?

I am trying to make it so that if a user clicks the left mouse button at 200x300 then a variable will be changed. I searched online for tutorials but cannot find a solution.

function love.load()
    medium = love.graphics.newFont(45)
    small = love.graphics.newFont(25)
    micro = love.graphics.newFont(14)

    StartGame = false
end

function love.draw()
    love.graphics.setColor(255, 0, 0)
    love.graphics.setFont(small)
    love.graphics.print("Play", 200, 300)
end

function love.mousepressed(x, y, button)
    if love.mousepressed( 200, 300, 'l' ) then
        StartGame = true
    end
end

function love.mousereleased(x, y, button)
end

function love.quit()
end

Upvotes: 2

Views: 3517

Answers (3)

fenrir
fenrir

Reputation: 1

Self explaining, the other examples had l as in L, that is wrong! the return is 1 2 or 3

testvar = "PLAY"
location = "location"
function love.load()
  medium = love.graphics.newFont(45)
  small = love.graphics.newFont(25)
  micro = love.graphics.newFont(14)
        
  StartGame = false
end
    
function love.upate()
  if  StartGame == true then love.quit()
  end
end
    
function love.draw()
  love.graphics.setColor(255, 0, 0)
  love.graphics.setFont(small)
  love.graphics.print(testvar, 200, 300)
  love.graphics.print(location, 100, 100)
end
    
function love.mousepressed(x, y, button)
  testvar = button
  if button == 1 then location = "x:"..tostring(x).." y:"..tostring(x) --extra nested if block is not nessary this can be evaluated in the same if block...
    if (inbox(200, 300, 20, x, y)) then
      testvar = "StartGame"
      -- StartGame = true
    end
  end
end
    
function inbox(cx, cy, scale, x, y)
  local dx = cx + scale --love draws from left top corner, 
  local dy = cy + scale --i assume you want scale to be the same size as your object
  if (x>cx and x<dx) and (y>cy and y<dy) then
    return true
  end
  return false
end
    
function love.mousereleased(x, y, button)
end
    
function love.quit()
end

Upvotes: 0

lion
lion

Reputation: 67

to select a single point perfectly use of the below code

 function love.mousepressed(x, y, button)
   if button == 1 and x>200 and x<230 and y>280 and y<320 then
   StartGame = true
end
end

Upvotes: 1

ryanpattison
ryanpattison

Reputation: 6251

This will set the variable when the user clicks down at 200, 300

function love.mousepressed(x, y, button)
   if button == "l" and x == 200 and y == 300 then
       StarGame = true
   end
end

But that is likely to be too demanding on the user to select a single point perfectly. So the code below adds 10 pixels around the point (200, 300) to make it easier to click.

local function inCircle(cx, cy, radius, x, y)
    local dx = cx - x
    local dy = cy - y
    return dx * dx + dy * dy <= radius * radius
end


function love.mousepressed(x, y, button)
   if button == "l" and inCircle(200, 300, 10, x, y) then
      StartGame = true
   end
end

Try changing 10 to find what feels right.

Upvotes: 4

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