mirror of
https://github.com/tanema/light_world.lua.git
synced 2024-10-16 21:04:17 +00:00
298 lines
11 KiB
Lua
298 lines
11 KiB
Lua
--[[
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The MIT License (MIT)
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Copyright (c) 2014 Marcus Ihde, Tim Anema
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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]]
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local _PACKAGE = string.gsub(...,"%.","/") or ""
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if string.len(_PACKAGE) > 0 then _PACKAGE = _PACKAGE .. "/" end
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local class = require(_PACKAGE..'class')
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local Light = require(_PACKAGE..'light')
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local Body = require(_PACKAGE..'body')
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local util = require(_PACKAGE..'util')
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local PostShader = require(_PACKAGE..'postshader')
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local light_world = class()
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light_world.blurv = love.graphics.newShader(_PACKAGE.."shaders/blurv.glsl")
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light_world.blurh = love.graphics.newShader(_PACKAGE.."shaders/blurh.glsl")
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light_world.refractionShader = love.graphics.newShader(_PACKAGE.."shaders/refraction.glsl")
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light_world.reflectionShader = love.graphics.newShader(_PACKAGE.."shaders/reflection.glsl")
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function light_world:init(options)
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self.lights = {}
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self.body = {}
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self.post_shader = PostShader()
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self.l, self.t, self.s = 0, 0, 1
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self.ambient = {0, 0, 0}
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self.refractionStrength = 8.0
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self.reflectionStrength = 16.0
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self.reflectionVisibility = 1.0
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self.shadowBlur = 0.0
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self.glowBlur = 1.0
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self.glowTimer = 0.0
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self.glowDown = false
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options = options or {}
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for k, v in pairs(options) do self[k] = v end
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self:refreshScreenSize()
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end
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function light_world:refreshScreenSize(w, h)
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w, h = w or love.window.getWidth(), h or love.window.getHeight()
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self.w, self.h = w, h
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self.render_buffer = love.graphics.newCanvas(w, h)
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self.normal = love.graphics.newCanvas(w, h)
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self.normal2 = love.graphics.newCanvas(w, h)
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self.normalMap = love.graphics.newCanvas(w, h)
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self.shadowMap = love.graphics.newCanvas(w, h)
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self.glowMap = love.graphics.newCanvas(w, h)
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self.glowMap2 = love.graphics.newCanvas(w, h)
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self.refractionMap = love.graphics.newCanvas(w, h)
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self.refractionMap2 = love.graphics.newCanvas(w, h)
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self.reflectionMap = love.graphics.newCanvas(w, h)
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self.reflectionMap2 = love.graphics.newCanvas(w, h)
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self.blurv:send("screen", {w, h})
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self.blurh:send("screen", {w, h})
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self.refractionShader:send("screen", {w, h})
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self.reflectionShader:send("screen", {w, h})
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for i = 1, #self.lights do
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self.lights[i]:refresh(w, h)
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end
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self.post_shader:refreshScreenSize(w, h)
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end
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function light_world:update(dt)
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for i = 1, #self.body do
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if self.body[i]:isInRange(self.l,self.t,self.w,self.h,self.s) and
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self.body[i].type == 'animation' then
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self.body[i]:update(dt)
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end
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end
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end
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function light_world:draw(cb)
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util.drawto(self.render_buffer, self.l, self.t, self.s, function()
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cb( self.l,self.t,self.w,self.h,self.s)
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self:drawMaterial( self.l,self.t,self.w,self.h,self.s)
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self:drawNormalShading( self.l,self.t,self.w,self.h,self.s)
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self:drawGlow( self.l,self.t,self.w,self.h,self.s)
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self:drawRefraction( self.l,self.t,self.w,self.h,self.s)
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self:drawReflection( self.l,self.t,self.w,self.h,self.s)
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end)
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self.post_shader:drawWith(self.render_buffer, self.l, self.t, self.s)
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end
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function light_world:drawBlur(blendmode, blur, canvas, canvas2, l, t, w, h, s)
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if blur <= 0 then
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return
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end
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canvas2:clear()
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self.blurv:send("steps", blur)
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self.blurh:send("steps", blur)
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util.drawCanvasToCanvas(canvas, canvas2, {shader = self.blurv, blendmode = blendmode})
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util.drawCanvasToCanvas(canvas2, canvas, {shader = self.blurh, blendmode = blendmode})
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end
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-- draw normal shading
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function light_world:drawNormalShading(l,t,w,h,s)
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-- create normal map
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self.normalMap:clear()
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util.drawto(self.normalMap, l, t, s, function()
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for i = 1, #self.body do
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if self.body[i]:isInRange(l,t,w,h,s) then
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self.body[i]:drawNormal()
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end
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end
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end)
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self.normal2:clear()
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for i = 1, #self.lights do
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if self.lights[i]:inRange(l,t,w,h,s) then
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-- create shadow map for this light
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self.shadowMap:clear()
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util.drawto(self.shadowMap, l, t, s, function()
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for k = 1, #self.body do
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if self.body[k]:isInLightRange(self.lights[i]) and self.body[k]:isInRange(l,t,w,h,s) then
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self.body[k]:drawShadow(self.lights[i])
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end
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end
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end)
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-- draw scene for this light using normals and shadowmap
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self.lights[i]:drawNormalShading(l,t,w,h,s, self.normalMap, self.shadowMap, self.normal2)
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end
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end
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-- add in ambient color
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self.normal:clear(255, 255, 255)
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util.drawCanvasToCanvas(self.normal2, self.normal, {blendmode = "alpha"})
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util.drawto(self.normal, l, t, s, function()
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love.graphics.setBlendMode("additive")
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love.graphics.setColor({self.ambient[1], self.ambient[2], self.ambient[3]})
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love.graphics.rectangle("fill", -l/s, -t/s, w/s,h/s)
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end)
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light_world:drawBlur("alpha", self.shadowBlur, self.normal, self.normal2, l, t, w, h, s)
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util.drawCanvasToCanvas(self.normal, self.render_buffer, {blendmode = "multiplicative"})
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end
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-- draw material
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function light_world:drawMaterial(l,t,w,h,s)
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for i = 1, #self.body do
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if self.body[i]:isInRange(l,t,w,h,s) then
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self.body[i]:drawMaterial()
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end
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end
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end
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-- draw glow
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function light_world:drawGlow(l,t,w,h,s)
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if self.glowDown then
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self.glowTimer = math.max(0.0, self.glowTimer - love.timer.getDelta())
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else
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self.glowTimer = math.min(self.glowTimer + love.timer.getDelta(), 1.0)
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end
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if self.glowTimer == 1.0 or self.glowTimer == 0.0 then
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self.glowDown = not self.glowDown
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end
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-- create glow map
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self.glowMap:clear(0, 0, 0)
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util.drawto(self.glowMap, l, t, s, function()
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for i = 1, #self.body do
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if self.body[i]:isInRange(l,t,w,h,s) then
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self.body[i]:drawGlow()
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end
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end
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end)
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light_world:drawBlur("alpha", self.glowBlur, self.glowMap, self.glowMap2, l, t, w, h, s)
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util.drawCanvasToCanvas(self.glowMap, self.render_buffer, {blendmode = "additive"})
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end
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-- draw refraction
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function light_world:drawRefraction(l,t,w,h,s)
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-- create refraction map
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self.refractionMap:clear()
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util.drawto(self.refractionMap, l, t, s, function()
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for i = 1, #self.body do
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if self.body[i]:isInRange(l,t,w,h,s) then
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self.body[i]:drawRefraction()
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end
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end
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end)
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util.drawCanvasToCanvas(self.render_buffer, self.refractionMap2)
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self.refractionShader:send("backBuffer", self.refractionMap2)
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self.refractionShader:send("refractionStrength", self.refractionStrength)
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util.drawCanvasToCanvas(self.refractionMap, self.render_buffer, {shader = self.refractionShader})
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end
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-- draw reflection
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function light_world:drawReflection(l,t,w,h,s)
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-- create reflection map
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self.reflectionMap:clear(0, 0, 0)
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util.drawto(self.reflectionMap, l, t, s, function()
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for i = 1, #self.body do
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if self.body[i]:isInRange(l,t,w,h,s) then
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self.body[i]:drawReflection()
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end
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end
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end)
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util.drawCanvasToCanvas(self.render_buffer, self.reflectionMap2)
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self.reflectionShader:send("backBuffer", self.reflectionMap2)
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self.reflectionShader:send("reflectionStrength", self.reflectionStrength)
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self.reflectionShader:send("reflectionVisibility", self.reflectionVisibility)
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util.drawCanvasToCanvas(self.reflectionMap, self.render_buffer, {shader = self.reflectionShader})
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end
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-- new light
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function light_world:newLight(x, y, red, green, blue, range)
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self.lights[#self.lights + 1] = Light(x, y, red, green, blue, range)
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return self.lights[#self.lights]
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end
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function light_world:clear()
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light_world:clearLights()
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light_world:clearBodies()
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end
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function light_world:setTranslation(l, t, s)
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self.l, self.t, self.s = l or self.l, t or self.t, s or self.s
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end
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function light_world:setScale(s) self.s = s end
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function light_world:clearLights() self.lights = {} end
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function light_world:clearBodies() self.body = {} end
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function light_world:setAmbientColor(red, green, blue) self.ambient = {red, green, blue} end
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function light_world:setShadowBlur(blur) self.shadowBlur = blur end
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function light_world:setGlowStrength(strength) self.glowBlur = strength end
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function light_world:setRefractionStrength(strength) self.refractionStrength = strength end
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function light_world:setReflectionStrength(strength) self.reflectionStrength = strength end
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function light_world:setReflectionVisibility(visibility) self.reflectionVisibility = visibility end
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function light_world:getBodyCount() return #self.body end
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function light_world:getBody(n) return self.body[n] end
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function light_world:getLightCount() return #self.lights end
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function light_world:getLight(n) return self.lights[n] end
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function light_world:newRectangle(...) return self:newBody("rectangle", ...) end
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function light_world:newAnimationGrid(...) return self:newBody("animation", ...) end
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function light_world:newCircle(...) return self:newBody("circle", ...) end
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function light_world:newPolygon(...) return self:newBody("polygon", ...) end
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function light_world:newImage(...) return self:newBody("image", ...) end
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function light_world:newRefraction(...) return self:newBody("refraction", ...) end
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function light_world:newReflection(normal, ...) return self:newBody("reflection", ...) end
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-- new body
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function light_world:newBody(type, ...)
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local id = #self.body + 1
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self.body[id] = Body(id, type, ...)
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return self.body[#self.body]
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end
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function light_world:remove(to_kill)
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if to_kill:is_a(Body) then
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for i = 1, #self.body do
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if self.body[i] == to_kill then
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table.remove(self.body, i)
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return true
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end
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end
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elseif to_kill:is_a(Light) then
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for i = 1, #self.lights do
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if self.lights[i] == to_kill then
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table.remove(self.lights, i)
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return true
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end
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end
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end
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-- failed to find it
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return false
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end
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return light_world
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