78 lines
2.1 KiB
Lua
78 lines
2.1 KiB
Lua
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math.randomseed(os.time())
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local MOONS = {}
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local t_moon = nil
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for i = 1, 10 do
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local color = {math.random(200),math.random(100),math.random(200)}
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local moon = {500+math.random(400)-200,200+math.random(400)-200,math.random(10)+1,color}
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table.insert(MOONS, moon)
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if moon[2] > 50 and (not t_moon or math.random()>0.5) then
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t_moon = moon
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end
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end
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local function generate_planet_canvas ()
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local canvas = love.graphics.newCanvas()
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local shader = love.graphics.newShader([[
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vec4 effect( vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords )
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{
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vec4 texcolor = Texel(texture, texture_coords);
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if (color.r == 0.8 && color.g == 1 && color.b == 0.5) {
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float dist = sqrt(pow(screen_coords.x-500, 2)+pow(screen_coords.y-100, 2));
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return vec4(0.8, 1, 0.5, 1) * min(1, 0.05*(208-dist));
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} else if (color.r == 1 && color.g == 1 && color.b == 1 && screen_coords.y<100 && (pow(screen_coords.x-500, 2)+pow(screen_coords.y-100, 2) < 200*200)) {
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return vec4(0, 0, 0, 0);
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} else {
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return texcolor * color;
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}
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}
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]])
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love.graphics.setCanvas(canvas)
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love.graphics.setShader(shader)
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love.graphics.setColor(255*0.8,255*1,255*0.5,255)
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love.graphics.circle("fill", 500, 100, 200)
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love.graphics.setColor(255,255,255,50)
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for i = 1, 40 do
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love.graphics.ellipse("line", 500, 125, 300-i, 50-i*1/6 )
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end
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for _, moon in ipairs(MOONS) do
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love.graphics.setColor(moon[4])
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love.graphics.circle("fill",moon[1],moon[2],moon[3])
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end
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love.graphics.setShader()
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love.graphics.setCanvas()
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return canvas
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end
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--------------------------------------------------------------------------------
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local PLANET = generate_planet_canvas()
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local SCREENS = {}
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SCREENS[1] = function (t)
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t = t * 0.1
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love.graphics.draw(PLANET)
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love.graphics.setColor(255,255,255,255)
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love.graphics.circle("fill", 400*(1-t)+t_moon[1]*t, 600*(1-t)+t*t_moon[2], math.min(0, 50*(t-1)))
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end
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local screen_id = 1
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local time = 0
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--------------------------------------------------------------------------------
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function love.load ()
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end
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function love.update (dt)
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time = time + dt
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end
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function love.draw ()
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SCREENS[screen_id](time)
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end
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