library-mirrors/light_world.lua
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added image shadows, took out useless code

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Tim Anema 2014-11-29 20:19:03 -05:00
parent 410388d423
commit 0a2da63f24
5 changed files with 47 additions and 154 deletions
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3
examples/test.lua
View File

@ -24,9 +24,8 @@ function love.load()
end)
circle_image = love.graphics.newImage(circle_canvas:getImageData())
local t = lightWorld:newImage(circle_image, 150, 150)
local t = lightWorld:newCircle(150, 150, radius)
t:setNormalMap(normal_map.generateFlat(circle_image, "top"))
t:setShadowType('circle', 50)
end
function love.mousepressed(x, y, c)

120
lib/body.lua
View File

@ -373,80 +373,6 @@ function body:setShadowType(type, ...)
end
end
function body:stencil()
if self.shadowType == "circle" then
love.graphics.circle("fill", self.x - self.ox, self.y - self.oy, self.radius)
elseif self.shadowType == "rectangle" then
love.graphics.rectangle("fill", self.x - self.ox, self.y - self.oy, self.width, self.height)
elseif self.shadowType == "polygon" then
love.graphics.polygon("fill", unpack(self.data))
elseif self.shadowType == "image" then
--love.graphics.rectangle("fill", self.x - self.ox, self.y - self.oy, self.width, self.height)
end
end
function body:drawShadow(light)
if self.alpha < 1.0 then
love.graphics.setBlendMode("multiplicative")
love.graphics.setColor(self.red, self.green, self.blue)
if self.shadowType == "circle" then
love.graphics.circle("fill", self.x - self.ox, self.y - self.oy, self.radius)
elseif self.shadowType == "rectangle" then
love.graphics.rectangle("fill", self.x - self.ox, self.y - self.oy, self.width, self.height)
elseif self.shadowType == "polygon" then
love.graphics.polygon("fill", unpack(self.data))
end
end
if self.shadowType == "image" and self.img then
love.graphics.setBlendMode("alpha")
local length = 1.0
local shadowRotation = math.atan2((self.x) - light.x, (self.y + self.oy) - light.y)
self.shadowVert = {
{
math.sin(shadowRotation) * self.imgHeight * length,
(length * math.cos(shadowRotation) + 1.0) * self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY,
0, 0,
self.red,
self.green,
self.blue,
self.alpha * self.fadeStrength * 255
},
{
self.imgWidth + math.sin(shadowRotation) * self.imgHeight * length,
(length * math.cos(shadowRotation) + 1.0) * self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY,
1, 0,
self.red,
self.green,
self.blue,
self.alpha * self.fadeStrength * 255
},
{
self.imgWidth,
self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY,
1, 1,
self.red,
self.green,
self.blue,
self.alpha * 255
},
{
0,
self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY,
0, 1,
self.red,
self.green,
self.blue,
self.alpha * 255
}
}
self.shadowMesh:setVertices(self.shadowVert)
love.graphics.draw(self.shadowMesh, self.x - self.ox, self.y - self.oy, 0, s, s)
end
end
function body:drawNormal()
if self.type == "image" and self.normalMesh then
love.graphics.setColor(255, 255, 255)
@ -539,6 +465,52 @@ function body:drawCalculatedShadow(light)
return self:calculatePolyShadow(light)
elseif self.shadowType == "circle" then
return self:calculateCircleShadow(light)
elseif self.shadowType == "image" and self.img then
local length = 1.0
local shadowRotation = math.atan2((self.x) - light.x, (self.y + self.oy) - light.y)
self.shadowVert = {
{
math.sin(shadowRotation) * self.imgHeight * length,
(length * math.cos(shadowRotation) + 1.0) * self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY,
0, 0,
self.red,
self.green,
self.blue,
self.alpha * self.fadeStrength * 255
},
{
self.imgWidth + math.sin(shadowRotation) * self.imgHeight * length,
(length * math.cos(shadowRotation) + 1.0) * self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY,
1, 0,
self.red,
self.green,
self.blue,
self.alpha * self.fadeStrength * 255
},
{
self.imgWidth,
self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY,
1, 1,
self.red,
self.green,
self.blue,
self.alpha * 255
},
{
0,
self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY,
0, 1,
self.red,
self.green,
self.blue,
self.alpha * 255
}
}
love.graphics.setColor(self.red, self.green, self.blue, self.alpha)
self.shadowMesh:setVertices(self.shadowVert)
love.graphics.draw(self.shadowMesh, self.x - self.ox, self.y - self.oy, 0, s, s)
end
end

1
lib/light.lua
View File

@ -1,6 +1,5 @@
local _PACKAGE = (...):match("^(.+)[%./][^%./]+") or ""
local class = require(_PACKAGE.."/class")
local stencils = require(_PACKAGE..'/stencils')
local util = require(_PACKAGE..'/util')
local light = class()

41
lib/shaders/shine.glsl
View File

@ -1,41 +0,0 @@
#define PI 3.1415926535897932384626433832795
extern vec3 lightPosition;
extern vec3 lightColor;
extern float lightRange;
extern float lightSmooth;
extern vec2 lightGlow;
extern float lightDirection;
extern float lightAngle;
vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords){
vec4 pixel = Texel(texture, texture_coords);
vec3 lightToPixel = vec3(pixel_coords.x, pixel_coords.y, 0.0) - lightPosition;
float distance = length(lightToPixel);
float att = 1 - distance / lightRange;
if(lightAngle > 0.0) {
float angle2 = atan(lightPosition.x - pixel_coords.x, pixel_coords.y - lightPosition.y) + PI;
if(lightDirection - lightAngle > 0 && lightDirection + lightAngle < PI * 2) {
if(angle2 < mod(lightDirection + lightAngle, PI * 2) && angle2 > mod(lightDirection - lightAngle, PI * 2)) {
return vec4(0.0, 0.0, 0.0, 1.0);
}
} else {
if(angle2 < mod(lightDirection + lightAngle, PI * 2) || angle2 > mod(lightDirection - lightAngle, PI * 2)) {
return vec4(0.0, 0.0, 0.0, 1.0);
}
}
}
if (distance <= lightRange) {
if (lightGlow.x < 1.0 && lightGlow.y > 0.0) {
pixel.rgb = clamp(lightColor * pow(att, lightSmooth) + pow(smoothstep(lightGlow.x, 1.0, att), lightSmooth) * lightGlow.y, 0.0, 1.0);
} else {
pixel.rgb = lightColor * pow(att, lightSmooth);
}
} else {
return vec4(0.0, 0.0, 0.0, 1.0);
}
return pixel;
}

36
lib/stencils.lua
View File

@ -1,36 +0,0 @@
local stencils = {}
function stencils.shadow(geometry, bodies)
return function()
--cast shadows
for i = 1,#geometry do
if geometry[i].alpha == 1.0 then
love.graphics.polygon("fill", unpack(geometry[i]))
if geometry[i].circle then
love.graphics.arc("fill", unpack(geometry[i].circle))
end
end
end
-- underneath shadows
for i = 1, #bodies do
if not bodies[i].castsNoShadow then
bodies[i]:stencil()
end
end
end
end
function stencils.shine(bodies)
return function()
for i = 1, #bodies do
if bodies[i].shine and
(bodies[i].glowStrength == 0.0 or
(bodies[i].type == "image" and not bodies[i].normal))
then
bodies[i]:stencil()
end
end
end
end
return stencils