library-mirrors/light_world.lua
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really simplified directional lights

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This commit is contained in:
Tim Anema 2014-12-14 00:07:39 -05:00
parent 6ae929fbeb
commit 81bcb0e347
2 changed files with 3 additions and 16 deletions
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5
lib/init.lua
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@ -138,6 +138,9 @@ function light_world:drawNormalShading(l,t,w,h,s)
self.bodies[k]:drawShadow(light)
end
end
local angle = math.pi - light.angle / 2.0
love.graphics.setColor(0, 0, 0)
love.graphics.arc("fill", light.x, light.y, light.range, light.direction - angle, light.direction + angle)
end)
-- draw scene for this light using normals and shadowmap
self.shadowShader:send('shadowMap', self.shadowMap)
@ -146,8 +149,6 @@ function light_world:drawNormalShading(l,t,w,h,s)
self.shadowShader:send('lightRange',{light.range * s})
self.shadowShader:send("lightSmooth", light.smooth)
self.shadowShader:send("lightGlow", {1.0 - light.glowSize, light.glowStrength})
self.shadowShader:send("lightAngle", math.pi - light.angle / 2.0)
self.shadowShader:send("lightDirection", light.direction)
self.shadowShader:send("invert_normal", self.normalInvert == true)
util.drawCanvasToCanvas(self.normalMap, self.normal2, {
blendmode = 'additive',

14
lib/shaders/shadow.glsl
View File

@ -14,15 +14,6 @@ extern float lightAngle; //if set, the light becomes directional to a slice
extern float lightDirection; //which direction to shine the light in if directional in degrees
extern bool invert_normal; //if the light should invert normals
//calculate if a pixel is within the light slice
bool not_in_slice(vec2 pixel_coords){
float angle = atan(lightPosition.x - pixel_coords.x, pixel_coords.y - lightPosition.y) + PI;
bool pastRightSide = angle < mod(lightDirection + lightAngle, PI * 2);
bool pastLeftSide = angle > mod(lightDirection - lightAngle, PI * 2);
bool lightUp = lightDirection - lightAngle > 0 && lightDirection + lightAngle < PI * 2;
return (lightUp && (pastRightSide && pastLeftSide)) || (!lightUp && (pastRightSide || pastLeftSide));
}
vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords) {
vec4 pixelColor = Texel(texture, texture_coords);
vec4 shadowColor = Texel(shadowMap, texture_coords);
@ -33,11 +24,6 @@ vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords) {
//not in range draw in shadows
return vec4(0.0, 0.0, 0.0, 1.0);
}else{
//if the light is a slice and the pixel is not inside
if(lightAngle > 0.0 && not_in_slice(pixel_coords)) {
return vec4(0.0, 0.0, 0.0, 1.0);
}
vec3 normal;
if(pixelColor.a > 0.0) {
//if on the normal map ie there is normal map data