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code/entities/NoiseTest.cs

@@ -0,0 +1,103 @@
+using Sandbox;
+
+[Library( "noise_test", Title = "Noise Test", Spawnable = true )]
+public partial class NoiseTest : Prop
+{
+	public override void Spawn()
+	{
+		base.Spawn();
+
+		SetModel( "models/citizen_props/balloonregular01.vmdl" );
+		SetupPhysicsFromModel( PhysicsMotionType.Dynamic, false );
+	}
+
+	[Event.Frame]
+	public void OnFrame()
+	{
+		var pos = Position;
+		var right = Rotation.Right * 4;
+		var forward = Rotation.Forward * 4;
+		var up = Rotation.Up * 50;
+		var offset = Time.Now * 2.0f;
+		var offsetz = Time.Now * 0.1f;
+
+		var mode = (int)((Time.Now * 0.3f) % 5);
+
+		switch ( mode )
+		{
+			case 0:
+				{
+					DebugOverlay.Text( pos, "Perlin" );
+					break;
+				}
+
+			case 1:
+				{
+					DebugOverlay.Text( pos, "SparseConvolution" );
+					break;
+				}
+
+			case 2:
+				{
+					DebugOverlay.Text( pos, "SparseConvolutionNormalized" );
+					break;
+				}
+
+			case 3:
+				{
+					DebugOverlay.Text( pos, "Turbulence" );
+					break;
+				}
+
+			case 4:
+				{
+					DebugOverlay.Text( pos, "Fractal" );
+					break;
+				}
+		}
+
+
+		var size = 100;
+
+		pos -= right * size * 0.5f;
+		pos -= forward * size * 0.5f;
+
+		for ( float x = 0; x < size; x++ )
+			for ( float y = 0; y < size; y++ )
+			{
+				float val = 0;
+
+				switch ( mode )
+				{
+					case 0:
+						{
+							val = Noise.Perlin( x * 0.1f + offset, y * 0.1f, offsetz ) * 0.5f;
+							break;
+						}
+					case 1:
+						{
+							val = Noise.SparseConvolution( x * 0.1f + offset, y * 0.1f, offsetz ) * 0.5f;
+							break;
+						}
+					case 2:
+						{
+							val = Noise.SparseConvolutionNormalized( x * 0.1f + offset, y * 0.1f, offsetz ) * 0.5f;
+							break;
+						}
+					case 3:
+						{
+							val = Noise.Turbulence( 2, x * 0.1f + offset, y * 0.1f, offsetz ) * 0.5f;
+							break;
+						}
+					case 4:
+						{
+							val = Noise.Fractal( 2, x * 0.1f + offset, y * 0.1f, offsetz ) * 0.5f;
+							break;
+						}
+				}
+
+				var start = pos + x * right + y * forward;
+				DebugOverlay.Line( start, start + up * val, Color.Lerp( Color.Red, Color.Green, (val + 1.0f) / 2.0f ) );
+			}
+	}
+}