Making a flashlight

[Kuromeku]

Anybody know how this could be achieved?

So that everything is very dark except from where the flashlight beam is?

[Kaze]

Draw a flashlight beam(image?) under the zombies?

[Kuromeku]

I don't see how that would work? I want to zombies to be dark too unless the flashlight is over them.

[evolve]

Not sure how optimized this would be, but you could have a giant image for the flashlight, it would have to be 4 times the screen size, and have a transparent hole in the middle of it. Then move that, and make sure the zombies are drawn under that layer.

[Kuromeku]

Didn't think of that! Well done! Thanks.

[surtic]

Here's some code that does what I think you want:

Code: Select all

function load()
   background = love.graphics.newImage("background.jpg")
   flashlight = love.graphics.newImage("flashlight.png")
   fw = flashlight:getWidth()
   fh = flashlight:getHeight()
end

function draw()
   local x, y = love.mouse.getPosition()
   love.graphics.draws(background, x, y, x-fw/2, y-fh/2, fw, fh)
   love.graphics.draw(flashlight, x, y)
end

Basically it draws just the rectangle under the flashlight, and then a flashlight mask on top of it.

Is that what you wanted?

[Kuromeku]

Oh my... that is perfect! Thank you very much!

I don't really understand how you achieved that though, I mean with the flashlight image?

[Kaze]

Oh my... that is perfect! Thank you very much!

I don't really understand how you achieved that though, I mean with the flashlight image?

The image is just black with a blurred hole(transparent) in the center

[Kuromeku]

How does it cut through the previous image though to make a hole? Pretty clever

Oh... it doesn't:

Code: Select all

 love.graphics.draws(background, x, y, x-fw/2, y-fh/2, fw, fh)

Hmm... This is kind of what I need but, hmm.

Guess I could just use setScissor to the size of the flashlight image.

[Kaze]

How does it cut through the previous image though to make a hole? Pretty clever

Oh... it doesn't:

Code: Select all

 love.graphics.draws(background, x, y, x-fw/2, y-fh/2, fw, fh)

Hmm... This is kind of what I need but, hmm.

Guess I could just use setScissor to the size of the flashlight image.

That or draw black around it. 4 rectangles)