Question: How do you scale an object in Love2D?

Answer

In Love2D, scaling an object can be done using the love.graphics.scale function or by adjusting the scale parameters in functions like love.graphics.draw. Below is an example of how to scale an object in Love2D:

function love.load()
  -- Load an image
  image = love.graphics.newImage('path/to/image.png')
end

function love.draw()
  local scaleX, scaleY = 2, 2  -- Scale factors: 2x width, 2x height
  
  -- Scale the entire drawing environment
  love.graphics.push()  -- Save the current transformation
  love.graphics.scale(scaleX, scaleY)
  
  -- Draw the image at (100, 100) after scaling
  -- It means the image will be drawn at (200, 200) with twice the original size
  love.graphics.draw(image, 100, 100)
  
  love.graphics.pop() -- Revert back to the original transformation
end

In this code, we use love.graphics.push and love.graphics.pop to isolate the scaling transformation so that it only affects the specific draw call between them. This way, other elements drawn outside of the push/pop block are not scaled.

Alternatively, you can directly provide the scale factors to the love.graphics.draw function without altering the entire drawing environment:

function love.draw()
  local x, y = 100, 100
  local scaleX, scaleY = 2, 2  -- Scale factors: 2x width, 2x height
  
  -- Draw the image at (100, 100) with the specified scale
  love.graphics.draw(image, x, y, 0, scaleX, scaleY)
end

In this second example, the draw function takes additional arguments for rotation (set to 0 here) and scaling (scaleX, scaleY). The image is scaled during the draw call without affecting other graphics operations.