Löve "Light vs. Shadow" Engine v2

Showcase your libraries, tools and other projects that help your fellow love users.
Relazy
Citizen
Posts: 51
Joined: Thu Jul 10, 2014 11:10 pm

Re: Löve "Light vs. Shadow" Engine v2

Post by Relazy »

drunken_thor wrote:Just an update, I pretty much implemented scaling and rotating of light bodies, there is just some inaccuracy in them so the object get slightly smaller if you rotate them and scaling does not match up with how love.graphics.draw scales so it will be a different size depending on the scale.
Did you commit on github? I don't see any new updates :? . Thanks for keeping the plugin alive! Another suggestion would be to implement z-map, although from my perspective that looks to be difficult to implement based on the current structure of the plugin(Unless I am too dumb to see that it's already implemented).
User avatar
drunken_thor
Citizen
Posts: 75
Joined: Wed Oct 01, 2014 12:14 am
Location: Toronto, Canada
Contact:

Re: Löve "Light vs. Shadow" Engine v2

Post by drunken_thor »

I just pushed a rotation_and_scaling branch on github, you can check it out there. I ended making rectangles into polygons to eliminate some extra code and I think I am going to have to approach rotating and scaling from a different way because to address the inaccuracy issues/
Light_world.lua for all your lighting needs
Talkies for all dialog needs
Github
twitter
User avatar
drunken_thor
Citizen
Posts: 75
Joined: Wed Oct 01, 2014 12:14 am
Location: Toronto, Canada
Contact:

Re: Löve "Light vs. Shadow" Engine v2

Post by drunken_thor »

Okay I have finally finished scaling and rotating most things I am not sure I did scaling circles now that I think about it.....

Anyways it is all merged into master now so try it out and let me know what it means. If you have problems it is all tagged you can use the 2.0 tag.
Light_world.lua for all your lighting needs
Talkies for all dialog needs
Github
twitter
User avatar
drunken_thor
Citizen
Posts: 75
Joined: Wed Oct 01, 2014 12:14 am
Location: Toronto, Canada
Contact:

Re: Löve "Light vs. Shadow" Engine v2

Post by drunken_thor »

okay finished circles now as well!
Light_world.lua for all your lighting needs
Talkies for all dialog needs
Github
twitter
Relazy
Citizen
Posts: 51
Joined: Thu Jul 10, 2014 11:10 pm

Re: Löve "Light vs. Shadow" Engine v2

Post by Relazy »

I am having trouble with rotation.. First of all if I have a "rectangle" type shadow, I get an error as "self.unit_data" is nil in body.lua 126. However when I swap the type to Image, the issue I described before shows up again. Heres a screen shot(Note: it's rotated by 180 degrees):
Attachments
err.png
err.png (21.9 KiB) Viewed 7479 times
User avatar
8bitDaemon
Prole
Posts: 5
Joined: Sat Nov 16, 2013 3:32 am

Re: Löve "Light vs. Shadow" Engine v2

Post by 8bitDaemon »

I'm having some issues with implementing the engine with my camera. Basically my camera and the light engine don't line up, or the light engine will cancel out the cameras zoom and stuff like that. I'm not using HUMP but a different one that includes parallax and camera boundaries. The damn camera works wonderfully until I try to put the lights through it. Heres the code for the camera:

Code: Select all

camera = {}
camera._x = 0
camera._y = 0
camera.scaleX = 1
camera.scaleY = 1
camera.rotation = 0
camera.layers = {}


--creates layers for parralax
function camera:newLayer(scale, func)
  table.insert(self.layers, {draw = func, scale = scale}) 
  table.sort(self.layers, function(a,b) return a.scale < b.scale end)
end

--draws the parralax layers
function camera:draw()
  local bx, by = self._x, self._y
  
  for _, v in ipairs(self.layers) do
    self._x = bx *v.scale
    self._y = by *v.scale
    camera:set()
    v.draw()
    camera:unset()
    
    end
  
 end

--attaches the camear
function camera:set()
  love.graphics.push()
  love.graphics.rotate(-self.rotation)
  love.graphics.scale(self.scaleX, self.scaleY)
  love.graphics.translate(-self._x, -self._y)
 
end
 
 --detaches the camera
function camera:unset()
  love.graphics.pop()
end
 
 --moves the camera
function camera:move(dx, dy)
  self._x = self._x + (dx or 0)
  self._y = self._y + (dy or 0)
end
 
function camera:rotate(dr)
  self.rotation = self.rotation + dr
end
 
function camera:scale(sx, sy)
  sx = sx or 1
  self.scaleX = self.scaleX * sx
  self.scaleY = self.scaleY * (sy or sx)
end
 
function camera:setX(value)
  if self._bounds then
    self._x = math.clamp(value, self._bounds.x1, self._bounds.x2)
  else
    self._x = value
  end
end
 
function camera:setY(value)
  if self._bounds then
    self._y = math.clamp(value, self._bounds.y1, self._bounds.y2)
  else
    self._y = value
  end
end
 
function camera:setPosition(x, y)
  if x then self:setX(x) end
  if y then self:setY(y) end
end
 
function camera:setScale(sx, sy)
  self.scaleX = sx or self.scaleX
  self.scaleY = sy or self.scaleY
end
 
function camera:getBounds()
  return unpack(self._bounds)
end

 function camera:getPos()
   return self._x, self._y
 end
--sets the bounding box for the camera 
function camera:setBounds(x1, y1, x2, y2)
  self._bounds = { x1 = x1, y1 = y1, x2 = x2, y2 = y2 }
end
Heres the snippet where my draw is

Code: Select all

function love.draw()
 lightWorld:draw(function()
    camera:draw() 
camera:set()
 
 --normal drawing stuff here--
end)
  camera:unset()
   end
Yeah, I know I"m calling the lightWorld:draw before the camera:set while having the function end before the camera is unset, but It's the only way I can get it to work at all.

any help would be appreciated> :cry:
User avatar
drunken_thor
Citizen
Posts: 75
Joined: Wed Oct 01, 2014 12:14 am
Location: Toronto, Canada
Contact:

Re: Löve "Light vs. Shadow" Engine v2

Post by drunken_thor »

8bitDaemon wrote: Heres the snippet where my draw is

Code: Select all

function love.draw()
 lightWorld:draw(function()
    camera:draw() 
camera:set()
 
 --normal drawing stuff here--
end)
  camera:unset()
   end
any help would be appreciated> :cry:
You need to change your camera because normal usage of this would be something like this

Code: Select all

function love.draw()
   lightWorld:setTranslation(camera._x, camera.y, camera.scaleX, camera.scale)
    camera:set()
    lightWorld:draw(function()
        for _, v in ipairs(camera.layers) do
           v.draw()
        end
    end)
    camera:unset()  
end
Please see the camera examples and the normal usage examples to show you how light_world expects translation and scaling.
Light_world.lua for all your lighting needs
Talkies for all dialog needs
Github
twitter
User avatar
drunken_thor
Citizen
Posts: 75
Joined: Wed Oct 01, 2014 12:14 am
Location: Toronto, Canada
Contact:

Re: Löve "Light vs. Shadow" Engine v2

Post by drunken_thor »

Relazy wrote:I am having trouble with rotation.. First of all if I have a "rectangle" type shadow, I get an error as "self.unit_data" is nil in body.lua 126. However when I swap the type to Image, the issue I described before shows up again. Heres a screen shot(Note: it's rotated by 180 degrees):
Do you have any code I can see? unit_data is set when you create a rectangle and should never change after that so if it is nil you might be doing something I did not predict.
Light_world.lua for all your lighting needs
Talkies for all dialog needs
Github
twitter
Magicked
Prole
Posts: 4
Joined: Sun Aug 26, 2012 2:18 pm

Re: Löve "Light vs. Shadow" Engine v2

Post by Magicked »

This is a very noob question, but I'm trying to get a quick test to work and I am failing miserably. I'm sure I am missing something obvious. I just want to draw a tiny space ship and a light.

Code: Select all

local LightWorld = require "lib/lightworld"

function love.load(arg)
	camera = { x = 0, y = 0, scale = 1 }
	x = 300
	y = 400
	z = 1
	img = love.graphics.newImage("res/tinyship.png")
	img_normal = love.graphics.newImage("res/tinyship_normal.png")
	img_glow = love.graphics.newImage("res/tinyship_glow.png")
	lightWorld = LightWorld({
		ambient = {55,55,55},
		refractionStrength = 32.0,
		refractionVisibility = 0.75,
		shadowBlur = 0.0
	})
	sunLight = lightWorld:newLight(0,0,255,127,63,500)
	sunLight:setPosition(300,350,1)
	sunLight:setGlowStrength(0.3)
	sunLight:setVisible(true)
	sunLight:setRange(300)
	playerImageTest = lightWorld:newImage(img, x, y)
	playerImageTest:setNormalMap(img_normal)
	playerImageTest:setGlowMap(img_glow)
end

function love.update(dt)
	lightWorld:update(dt)
	sunLight:setPosition(200/camera.scale, 200/camera.scale, z)
end

function love.draw()
	love.graphics.setBackgroundColor(40,40,40)
	lightWorld:setTranslation(camera.x, camera.y, camera.scale)
	love.graphics.push()
    	love.graphics.translate(camera.x, camera.y)
    	love.graphics.scale(camera.scale)
    	lightWorld:draw(function()
    		love.graphics.setColor(255, 255, 255)
      		love.graphics.draw(img, x - img:getWidth() * 0.5, y - img:getHeight() * 0.5)
    	end)
  	love.graphics.pop()
  	love.graphics.setBlendMode("alpha")
end
This results in the following, even though I *think* the light should be right next to the ship.

Image

Like I say, I am probably missing something obvious. What am I doing wrong? Thanks!
User avatar
drunken_thor
Citizen
Posts: 75
Joined: Wed Oct 01, 2014 12:14 am
Location: Toronto, Canada
Contact:

Re: Löve "Light vs. Shadow" Engine v2

Post by drunken_thor »

Magicked wrote:This is a very noob question, but I'm trying to get a quick test to work and I am failing miserably. I'm sure I am missing something obvious. I just want to draw a tiny space ship and a light.

Code: Select all

local LightWorld = require "lib/lightworld"

function love.load(arg)
	camera = { x = 0, y = 0, scale = 1 }
	x = 300
	y = 400
	z = 1
	img = love.graphics.newImage("res/tinyship.png")
	img_normal = love.graphics.newImage("res/tinyship_normal.png")
	img_glow = love.graphics.newImage("res/tinyship_glow.png")
	lightWorld = LightWorld({
		ambient = {55,55,55},
		refractionStrength = 32.0,
		refractionVisibility = 0.75,
		shadowBlur = 0.0
	})
	sunLight = lightWorld:newLight(0,0,255,127,63,500)
	sunLight:setPosition(300,350,1)
	sunLight:setGlowStrength(0.3)
	sunLight:setVisible(true)
	sunLight:setRange(300)
	playerImageTest = lightWorld:newImage(img, x, y)
	playerImageTest:setNormalMap(img_normal)
	playerImageTest:setGlowMap(img_glow)
end

function love.update(dt)
	lightWorld:update(dt)
	sunLight:setPosition(200/camera.scale, 200/camera.scale, z)
end

function love.draw()
	love.graphics.setBackgroundColor(40,40,40)
	lightWorld:setTranslation(camera.x, camera.y, camera.scale)
	love.graphics.push()
    	love.graphics.translate(camera.x, camera.y)
    	love.graphics.scale(camera.scale)
    	lightWorld:draw(function()
    		love.graphics.setColor(255, 255, 255)
      		love.graphics.draw(img, x - img:getWidth() * 0.5, y - img:getHeight() * 0.5)
    	end)
  	love.graphics.pop()
  	love.graphics.setBlendMode("alpha")
end
This results in the following, even though I *think* the light should be right next to the ship.

Image

Like I say, I am probably missing something obvious. What am I doing wrong? Thanks!
This library works by blending the background with the lighting you need to draw a background of some sort (not just set the background color)
Light_world.lua for all your lighting needs
Talkies for all dialog needs
Github
twitter
Post Reply

Who is online

Users browsing this forum: Google [Bot] and 48 guests