noise banners

Author: tayloraswift

banner_cell2d.png

@@ -6,6 +6,10 @@ let viewer_size:Int = 1024
 
 import func Glibc.clock
 
+import NoiseTests
+
+banners(width: 700, ratio: 5)
+
 
 var pixbuf:[UInt8]
 let png_properties:PNGProperties = PNGProperties(width: viewer_size, height: viewer_size, bit_depth: 8, color: .grayscale, interlaced: false)!

banner_cell3d.png

@@ -0,0 +1,110 @@
+import Noise
+
+import MaxPNG
+
+func color_noise_png(r_noise:Noise, g_noise:Noise, b_noise:Noise,
+    width:Int, height:Int, value_offset:Double, invert:Bool = false, path:String)
+{
+    var pixbuf:[UInt8] = []
+        pixbuf.reserveCapacity(3 * width * height)
+    for (r, (g, b)) in zip(r_noise.sample_area_saturated_to_u8(width: width, height: height, offset: value_offset),
+                       zip(g_noise.sample_area_saturated_to_u8(width: width, height: height, offset: value_offset),
+                           b_noise.sample_area_saturated_to_u8(width: width, height: height, offset: value_offset)))
+    {
+        if invert
+        {
+            pixbuf.append(UInt8.max - r)
+            pixbuf.append(UInt8.max - g)
+            pixbuf.append(UInt8.max - b)
+        }
+        else
+        {
+            pixbuf.append(r)
+            pixbuf.append(g)
+            pixbuf.append(b)
+        }
+    }
+
+    guard let properties = PNGProperties(width: width, height: height, bit_depth: 8, color: .rgb, interlaced: false)
+    else
+    {
+        fatalError("failed to set png properties")
+    }
+
+    do
+    {
+        try png_encode(path: path, raw_data: pixbuf, properties: properties)
+    }
+    catch
+    {
+        print(error)
+    }
+}
+
+func banner_simplex2d(width:Int, height:Int, seed:Int)
+{
+    color_noise_png(r_noise: SimplexNoise2D(amplitude: 0.5*255, frequency: 0.015, seed: seed),
+                    g_noise: SimplexNoise2D(amplitude: 0.5*255, frequency: 0.0075, seed: seed + 1),
+                    b_noise: SimplexNoise2D(amplitude: 0.5*255, frequency: 0.00375, seed: seed + 2),
+                    width: width,
+                    height: height,
+                    value_offset: 0.65*255,
+                    path: "banner_simplex2d.png")
+}
+
+func banner_supersimplex2d(width:Int, height:Int, seed:Int)
+{
+    color_noise_png(r_noise: SuperSimplexNoise2D(amplitude: 0.5*255, frequency: 0.01, seed: seed),
+                    g_noise: SuperSimplexNoise2D(amplitude: 0.5*255, frequency: 0.005, seed: seed + 1),
+                    b_noise: SuperSimplexNoise2D(amplitude: 0.5*255, frequency: 0.0025, seed: seed + 2),
+                    width: width,
+                    height: height,
+                    value_offset: 0.65*255,
+                    path: "banner_supersimplex2d.png")
+}
+
+func banner_supersimplex3d(width:Int, height:Int, seed:Int)
+{
+    color_noise_png(r_noise: SuperSimplexNoise3D(amplitude: 0.5*255, frequency: 0.01, seed: seed),
+                    g_noise: SuperSimplexNoise3D(amplitude: 0.5*255, frequency: 0.005, seed: seed + 1),
+                    b_noise: SuperSimplexNoise3D(amplitude: 0.5*255, frequency: 0.0025, seed: seed + 2),
+                    width: width,
+                    height: height,
+                    value_offset: 0.65*255,
+                    path: "banner_supersimplex3d.png")
+}
+
+func banner_cell2d(width:Int, height:Int, seed:Int)
+{
+    color_noise_png(r_noise: CellNoise2D(amplitude: 3*255, frequency: 0.03, seed: seed),
+                    g_noise: CellNoise2D(amplitude: 3*255, frequency: 0.015, seed: seed + 1),
+                    b_noise: CellNoise2D(amplitude: 3*255, frequency: 0.0075, seed: seed + 2),
+                    width: width,
+                    height: height,
+                    value_offset: 0,
+                    invert: true,
+                    path: "banner_cell2d.png")
+}
+
+func banner_cell3d(width:Int, height:Int, seed:Int)
+{
+    color_noise_png(r_noise: CellNoise3D(amplitude: 3*255, frequency: 0.03, seed: seed),
+                    g_noise: CellNoise3D(amplitude: 3*255, frequency: 0.015, seed: seed + 1),
+                    b_noise: CellNoise3D(amplitude: 3*255, frequency: 0.0075, seed: seed + 2),
+                    width: width,
+                    height: height,
+                    value_offset: 0,
+                    invert: true,
+                    path: "banner_cell3d.png")
+}
+
+public
+func banners(width:Int, ratio:Double)
+{
+    let height:Int = Int(Double(width) / ratio)
+    banner_simplex2d(width: width, height: height, seed: 5)
+    banner_supersimplex2d(width: width, height: height, seed: 8)
+    banner_supersimplex3d(width: width, height: height, seed: 0)
+    banner_cell2d(width: width, height: height, seed: 0)
+    banner_cell3d(width: width, height: height, seed: 0)
+}