light sources demo

assets/shaders/blur.glsl

@@ -0,0 +1,18 @@
+extern vec2 direction; // (1.0, 0.0) для X, (0.0, 1.0) для Y
+extern number radius;  // радиус размытия
+
+vec4 effect(vec4 vcolor, Image tex, vec2 texture_coords, vec2 screen_coords)
+{
+    vec4 sum = vec4(0.0);
+    float weightTotal = 0.0;
+
+    for (int i = -10; i <= 10; i++) {
+        float offset = float(i);
+        float weight = exp(-offset * offset / (2.0 * radius * radius));
+        vec2 shift = direction * offset / love_ScreenSize.xy;
+        sum += Texel(tex, texture_coords + shift) * weight;
+        weightTotal += weight;
+    }
+
+    return sum / weightTotal;
+}

assets/shaders/light.glsl

@@ -0,0 +1,30 @@
+extern vec3 color;
+extern number time;
+
+vec4 effect(vec4 vcolor, Image tex, vec2 texture_coords, vec2 screen_coords)
+{
+    vec4 texColor = Texel(tex, texture_coords);
+    
+    float mask = texColor.r;
+
+    vec2 uv = texture_coords - 0.5;
+    float dist = length(uv * 2.0);
+
+    float t = time;
+    
+    float wave = sin((uv.x + uv.y) * 6.0 + t * 1.5) * 0.03;
+    float ripple = sin(length(uv) * 20.0 - t * 2.0) * 0.02;
+    float flicker = sin(t * 2.5) * 0.02;
+
+    dist += wave + ripple + flicker;
+
+    float intensity = 1.0 - smoothstep(0.0, 1.0, dist);
+    intensity = pow(intensity, 2.0);
+
+    float colorShift = sin(t * 3.0) * 0.1;
+    vec3 flickerColor = color + vec3(colorShift, colorShift * 0.5, -colorShift * 0.3);
+
+    vec3 finalColor = flickerColor * intensity * mask;
+
+    return vec4(finalColor, mask * intensity);
+}

lib/light_source.lua

@@ -1,14 +1,21 @@
 __LightSource = {
     position = Vec3 {},
     power = 0,       -- in meters
-    color = Vec3 {} --r, g, b
+    color = Vec3 {}, --r, g, b
+    seed = 0,        -- random float to make every light unique,
+    shader = nil,
+    mask = nil
 }
 
-function LightSource(position, power, color)
+function LightSource(position, power, color, shader, mask)
     local l = {
         position = position,
         power = power,
-        color = color
+        color = color,
+        seed = math.random() * math.pi * 2,
+        shader = shader or AssetBundle.files.shaders.light,
+        mask = mask or AssetBundle.files.masks.circle
+
     }
     return setmetatable(l, { __index = __LightSource })
 end

main.lua

@@ -9,11 +9,7 @@ PIXELS_PER_METER = 48
 P = nil
 
 Entities = {}
-Lights = {
-    LightSource(Vec3 { 1, 1 }, 5),
-    -- LightSource(Vec3 { 300, 200 }, 5),
-    -- LightSource(Vec3 { 400, 200 }, 5)
-}
+Lights = nil
 
 function love.conf(t)
     t.console = true
@@ -21,13 +17,18 @@ end
 
 function love.load()
     AssetBundle:load()
-    love.window.setMode(1080, 720, { resizable = true, msaa = 4 })
+    love.window.setMode(1080, 720, { resizable = true, msaa = 4, vsync = true })
+
+    Lights = { LightSource(Vec3 { 1, 1 }, 3, Vec3 { 0.5, 0.2, 1.0 }),
+        LightSource(Vec3 { 4, 1 }, 10, Vec3 { 0.3, 0.7, 1.0 }, nil, AssetBundle.files.masks.noise),
+        LightSource(Vec3 { 7, 1 }, 3, Vec3 { 0.8, 0.3, 1.0 }), }
 
     P = Player('fox')
     P.entity.position = Vec3 { 7, 7 }
     Entities.player = P.entity
 
     Camera.position = Vec3 { 0, 0 }
+
     print('ready')
 end
 
@@ -44,41 +45,85 @@ local function worldToScreen(worldPos)
 end
 
 
-local function drawShadow(entity, light, radius)
-    local shadow_vec = light - entity.position
+local function drawShadow(entity, light)
+    local shadow_vec = light.position - entity.position
     local dist = shadow_vec:length()
-    if dist > radius then return end
+    if dist > light.power then return end
 
 
-    love.graphics.setColor(0, 0, 0, math.min(0.5, 1 - (dist / radius)))
+    love.graphics.setColor(0, 0, 0, math.min(0.5, 1 - (dist / light.power)))
     local tex, quad = entity:spriteFromAngle(shadow_vec:direction())
 
     love.graphics.draw(tex, quad,
         worldToScreen(entity.position).x,
         worldToScreen(entity.position).y - 10,
-        math.step_floor(shadow_vec:direction() - math.pi / 2, math.pi / 4),
+        shadow_vec:direction() - math.pi / 2,
         1, math.sin(20), tex:getHeight() / 2, tex:getHeight())
 
     love.graphics.setColor(1, 1, 1, 1)
 end
 
+local function drawLight(light)
+    local shader = light.shader
+
+    local pos = worldToScreen(light.position)
+    shader:send("color", { light.color.x, light.color.y, light.color.z })
+    shader:send("time", love.timer.getTime() + light.seed)
+
+    local scale = light.power * PIXELS_PER_METER / 64
+    love.graphics.setShader(shader)
+    love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.draw(light.mask,
+        pos.x - light.power * PIXELS_PER_METER,
+        pos.y - light.power * PIXELS_PER_METER,
+        0,
+        scale,
+        scale)
+    love.graphics.setShader()
+end
+
+
+local function applyBlur(input, output, radius)
+    local blurShader = AssetBundle.files.shaders.blur
+
+    -- Горизонтальный проход
+    blurShader:send("direction", { 1.0, 0.0 })
+    blurShader:send("radius", radius)
+
+    output:renderTo(function()
+        love.graphics.setShader(blurShader)
+        love.graphics.draw(input)
+        love.graphics.setShader()
+    end)
+
+    -- Вертикальный проход
+    input:renderTo(function()
+        love.graphics.setShader(blurShader)
+        blurShader:send("direction", { 0.0, 1.0 })
+        love.graphics.draw(output)
+        love.graphics.setShader()
+    end)
+end
 
 function love.draw()
-    love.graphics.clear(1, 1, 1)
-    local spriteCanvas = love.graphics.newCanvas()
-    local width, height = spriteCanvas:getDimensions()
-    spriteCanvas:setFilter("linear", "linear")
+    local width, height = love.graphics.getDimensions()
+    love.graphics.clear(0.1, 0.1, 0.1, 1.0)
 
-    love.graphics.setCanvas(spriteCanvas)
-    love.graphics.clear(1, 1, 1)
+    local spriteCanvas = love.graphics.newCanvas()
+    local shadowCanvas = love.graphics.newCanvas()
+    local lightCanvas = love.graphics.newCanvas()
+
+    love.graphics.clear(0.1, 0.1, 0.1, 1.0)
 
     love.graphics.push()
     love.graphics.translate(width / 2, height / 2) -- теперь экранный ноль координат будет в центре экрана
     for _, e in pairs(Entities) do
         for _, l in pairs(Lights) do
-            drawShadow(e, l.position, l.power)
+            love.graphics.setCanvas(shadowCanvas)
+            drawShadow(e, l)
         end
 
+        love.graphics.setCanvas(spriteCanvas)
         local tex, quad = e:spriteFromAngle(math.pi / 2)
         love.graphics.draw(tex, quad,
             worldToScreen(e.position).x,
@@ -88,17 +133,28 @@ function love.draw()
     end
 
 
-    love.graphics.setColor(1, 0, 0, 1)
-    love.graphics.push()
-    love.graphics.translate(worldToScreen(Lights[1].position).x, worldToScreen(Lights[1].position).y)
-    love.graphics.circle("fill", 0, 0, 0.1 * PIXELS_PER_METER)
-    love.graphics.pop()
-    love.graphics.pop()
-    love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.setCanvas(lightCanvas)
+    love.graphics.clear(0, 0, 0, 1)
+
+    for _, light in ipairs(Lights) do
+        drawLight(light)
+    end
 
     love.graphics.setCanvas()
 
+
+
+    love.graphics.pop()
+    love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.setCanvas()
+
+    applyBlur(shadowCanvas, love.graphics.newCanvas(), 10.0) -- тени мягче
+    love.graphics.draw(shadowCanvas)
     love.graphics.draw(spriteCanvas)
 
+    love.graphics.setBlendMode("add", "premultiplied")
+    love.graphics.draw(lightCanvas)
+    love.graphics.setBlendMode("alpha")
+
     love.graphics.setColor(1, 1, 1, 1)
 end