public static bool NoiseSampleSupported(enum_NoiseType _type)
{
switch (_type)
{
default:
return(false);
case enum_NoiseType.Simplex:
case enum_NoiseType.Perlin:
return(true);
}
}
public static float GetNoiseOctave(float x, float y, float scale, enum_NoiseType noiseType, int octaveCount)
{
float value = 0;
float frequency = 1;
float amplitude = .6f;
for (int i = 0; i < octaveCount; i++)
{
value += GetNoise(x * frequency, y * frequency, scale, noiseType) * amplitude;
amplitude *= .5f;
frequency *= 2;
}
return(value);
}
public static float GetNoise(float noiseX, float noiseY, float scale, enum_NoiseType noiseType)
{
float noise = 0;
noiseX *= scale;
noiseY *= scale;
switch (noiseType)
{
case enum_NoiseType.Value: noise = UNoise.ValueUnit(Mathf.Floor(noiseX), Mathf.Floor(noiseY)); break;
case enum_NoiseType.Perlin: noise = UNoise.PerlinUnit(noiseX, noiseY, 0); break;
case enum_NoiseType.Simplex: noise = UNoise.Simplex(noiseX, noiseY); break;
case enum_NoiseType.VoronoiUnit: noise = UNoise.VoronoiUnit(noiseX, noiseY).y; break;
case enum_NoiseType.VoronoiDistance: noise = UNoise.VoronoiUnit(noiseX, noiseY).x; break;
}
return(noise);
}
private void OnGUI()
{
EditorGUI.BeginChangeCheck();
HorizontalScope.Begin(5, 5, 20);
EditorGUI.LabelField(HorizontalScope.NextRect(0, 60), "Type:", UEGUIStyle_Window.m_TitleLabel);
m_NoiseType = (enum_NoiseType)EditorGUI.EnumPopup(HorizontalScope.NextRect(5, 120), m_NoiseType);
bool noiseSampleSupported = NoiseSampleSupported(m_NoiseType);
if (noiseSampleSupported)
{
HorizontalScope.NextLine(2, 20);
EditorGUI.LabelField(HorizontalScope.NextRect(0, 60), "Sample:", UEGUIStyle_Window.m_TitleLabel);
m_NoiseSample = (enum_NoiseSample)EditorGUI.EnumPopup(HorizontalScope.NextRect(5, 120), m_NoiseSample);
}
HorizontalScope.NextLine(2, 20);
EditorGUI.LabelField(HorizontalScope.NextRect(0, 60), "Filter:", UEGUIStyle_Window.m_TitleLabel);
m_FilterMode = (FilterMode)EditorGUI.EnumPopup(HorizontalScope.NextRect(5, 120), m_FilterMode);
HorizontalScope.NextLine(2, 20);
EditorGUI.LabelField(HorizontalScope.NextRect(0, 60), "Size:", UEGUIStyle_Window.m_TitleLabel);
m_SizePower = EditorGUI.IntSlider(HorizontalScope.NextRect(5, 120), m_SizePower, 3, 10);
int size = Mathf.RoundToInt(Mathf.Pow(2, m_SizePower));
EditorGUI.LabelField(HorizontalScope.NextRect(5, 40), size.ToString());
HorizontalScope.NextLine(2, 20);
EditorGUI.LabelField(HorizontalScope.NextRect(0, 60), "Scale:", UEGUIStyle_Window.m_TitleLabel);
m_Scale = EditorGUI.Slider(HorizontalScope.NextRect(5, 120), m_Scale, 1f, 30f);
HorizontalScope.NextLine(2, 20);
EditorGUI.LabelField(HorizontalScope.NextRect(0, 60), "Octave:", UEGUIStyle_Window.m_TitleLabel);
m_Octave = EditorGUI.Toggle(HorizontalScope.NextRect(5, 20), m_Octave);
if (m_Octave)
{
HorizontalScope.NextLine(2, 20);
EditorGUI.LabelField(HorizontalScope.NextRect(0, 60), "Count:", UEGUIStyle_Window.m_TitleLabel);
m_OctaveCount = EditorGUI.IntSlider(HorizontalScope.NextRect(5, 120), m_OctaveCount, 2, 7);
HorizontalScope.NextLine(2, 20);
}
if (!m_Texture || EditorGUI.EndChangeCheck())
{
float sizeF = size;
Color[] colors = new Color[size * size];
for (int i = 0; i < size; i++)
{
for (int j = 0; j < size; j++)
{
float noiseX = j / sizeF;
float noiseY = i / sizeF;
float noise = m_Octave ? GetNoiseOctave(noiseX, noiseY, m_Scale, m_NoiseType, m_OctaveCount) : GetNoise(noiseX, noiseY, m_Scale, m_NoiseType);
if (noiseSampleSupported)
{
switch (m_NoiseSample)
{
case enum_NoiseSample.Absolute: noise = Mathf.Abs(noise); break;
case enum_NoiseSample._01: noise = noise / 2f + .5f; break;
}
}
colors[i * size + j] = new Color(noise, noise, noise, 1);
}
}
m_Texture = new Texture2D(size, size, TextureFormat.ARGB32, true)
{
filterMode = m_FilterMode
};
m_Texture.SetPixels(colors);
m_Texture.Apply();
Undo.RecordObject(this, "Noise Generator Change");
}
HorizontalScope.NextLine(2, 256);
Rect textureRect = HorizontalScope.NextRect(0, 256);
GUI.DrawTexture(textureRect, EditorGUIUtility.whiteTexture);
GUI.DrawTexture(textureRect.Collapse(Vector2.one * 10f), m_Texture);
HorizontalScope.NextLine(2, 20);
if (GUI.Button(HorizontalScope.NextRect(0, 80), "Export"))
{
if (UEAsset.SaveFilePath(out string filePath, "png", "CustomNoise_" + m_NoiseType.ToString()))
{
UEAsset.CreateOrReplaceFile(filePath, m_Texture.EncodeToPNG());
}
}
}
