125 lines
3.5 KiB
Lua
125 lines
3.5 KiB
Lua
lg = love.graphics
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W,H = lg.getDimensions()
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local Noise = require "noise"
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local DRAW_RES = love.window.toPixels(4)
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local SCALE = 100
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local font = lg.newFont(love.window.toPixels(24))
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local decay = function(x) return .1^x end
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local function rng()
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local r = love.math.newRandomGenerator(1)
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return function() return r:random() end
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end
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local n1 = Noise.make1d(5,rng(),decay)
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local n2 = Noise.make2d(7,rng(),decay)
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local n3 = Noise.make3d(11,rng(),decay)
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local s1 = Noise.make1dShader(7,rng(),decay)
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local s2 = Noise.make2dShader(13,rng(),decay)
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local s3 = Noise.make3dShader(17,rng(),decay)
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local cw,ch = W/2,H/3
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local canv = lg.newCanvas(cw,ch)
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function love.load()
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xOffset = 0
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yOffset = 0
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t0 = love.timer.getTime()
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love.mouse.setCursor(love.mouse.getSystemCursor("hand"))
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end
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function love.mousepressed()
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love.mouse.setCursor(love.mouse.getSystemCursor("sizeall"))
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end
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function love.mousereleased()
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love.mouse.setCursor(love.mouse.getSystemCursor("hand"))
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end
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function love.draw()
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lg.setColor(255,255,255)
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lg.setLineWidth(love.window.toPixels(2))
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lg.setLineJoin("none")
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local p1 = {}
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for x=0,W-H/3,DRAW_RES do
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table.insert(p1,x)
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table.insert(p1,n1(x/SCALE+xOffset)*H/3)
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end
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lg.line(p1)
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local p2 = {}
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local t = love.timer.getTime()-t0
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for x=0,W-H/3,DRAW_RES do
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table.insert(p2,x)
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table.insert(p2,(1+n2(x/SCALE+xOffset,t))*H/3)
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end
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lg.line(p2)
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for y=0,H/6*1.2,2*DRAW_RES do
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local p3 = {}
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for x=0,W-H/3,DRAW_RES do
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table.insert(p3,x)
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table.insert(p3,2/3*H+H/6*n3(x/SCALE+xOffset,y/SCALE+yOffset,t)+y)
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end
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lg.line(p3)
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end
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for x=-H/6,W-H/3,DRAW_RES*2 do
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local p3 = {}
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local slant = .5
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for y=0,H/6*1.2,2*DRAW_RES do
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local x2 = x + slant*y
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if x2 < -2*DRAW_RES then goto continue end
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table.insert(p3,x2)
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table.insert(p3,2/3*H+H/6*n3(x2/SCALE+xOffset,y/SCALE+yOffset,t)+y)
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if x2 > W/2 then break end
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::continue::
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end
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if #p3 > 2 then
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lg.line(p3)
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end
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end
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lg.setShader(s1)
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s1:send("range_min", xOffset)
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s1:send("range_max", xOffset+cw/SCALE)
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lg.draw(canv,W-cw,0)
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lg.setShader(s2)
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s2:send("range_min", {xOffset,yOffset})
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s2:send("range_max", {xOffset+cw/SCALE,yOffset+ch/SCALE})
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lg.draw(canv,W-cw,ch)
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lg.setShader(s3)
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s3:send("range_min", {xOffset,yOffset})
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s3:send("range_max", {xOffset+cw/SCALE,yOffset+ch/SCALE})
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s3:send('z', t)
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lg.draw(canv,W-cw,2*ch)
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lg.setShader(nil)
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lg.setColor(255,200,0)
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lg.setFont(font)
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lg.printf("1D_Noise(x)", 5,5, W)
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lg.printf("2D_Noise(x,time)", 5,5+H/3, W)
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lg.printf("3D_Noise(x,y,time)", 5,5+2*H/3, W)
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lg.printf("1D_Noise_Shader(x)", 0,5, W-5, 'right')
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lg.printf("2D_Noise_Shader(x,y)", 0,5+H/3, W-5, 'right')
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lg.printf("3D_Noise_Shader(x,y,time)", 0,5+2*H/3, W-5, 'right')
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end
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function love.update(dt)
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local key = love.keyboard.isDown
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local dx = 400/SCALE*dt*((key('right') and 1 or 0) + (key('left') and -1 or 0))
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local dy = 400/SCALE*dt*((key('down') and 1 or 0) + (key('up') and -1 or 0))
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xOffset = xOffset + dx
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yOffset = yOffset + dy
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end
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function love.keypressed(key)
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if key == 'escape' then love.event.quit() end
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if key == 'r' then love.load() end
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end
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function love.mousemoved(x,y,dx,dy)
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if love.mouse.isDown(1) then
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xOffset = xOffset - dx/SCALE
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yOffset = yOffset - dy/SCALE
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end
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end
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