void GenerateNoise(NoiseTextureImageChannel channel, MaterialProperty scaleOffsetProperty, MaterialProperty strengthProperty, MaterialProperty amountOfBending = null)
{
Texture2D noiseTex = (Texture2D)noiseTexture.textureValue;
if (noiseTex == null)
{
const int defaultNoiseTextureSize = 128;
noiseTex = new Texture2D(defaultNoiseTextureSize, defaultNoiseTextureSize, TextureFormat.RGBAHalf, false, true);
//Mirror Texture Wrap Mode is only supported in Unity 2017 and newer
#if UNITY_2017_1_OR_NEWER
noiseTex.wrapMode = TextureWrapMode.Mirror;
#else
noiseTex.wrapMode = TextureWrapMode.Repeat;
#endif
noiseTex.filterMode = FilterMode.Bilinear;
noiseTexture.textureValue = noiseTex;
}
int noiseSize = noiseTex.width;
int channelIndex = (int)channel;
Texture2D noisePreviewTex = noiseTexturePreviews [channelIndex];
if (noisePreviewTex == null)
{
noisePreviewTex = new Texture2D(noiseSize, noiseSize, noiseTex.format, false, true);
noiseTexturePreviews [channelIndex] = noisePreviewTex;
}
Vector4 scaleOffset = scaleOffsetProperty.vectorValue;
Vector2 scale = new Vector2(scaleOffset.x, scaleOffset.y);
Vector2 offset = new Vector2(scaleOffset.z, scaleOffset.w);
float strength = strengthProperty.floatValue;
float bending = amountOfBending != null ? amountOfBending.floatValue : 0f;
Color[] noiseTexpixels = noiseTex.GetPixels();
Color[] previewTexPixels = noisePreviewTex.GetPixels();
for (int i = 0; i < noiseSize; i++)
{
for (int j = 0; j < noiseSize; j++)
{
float x = scale.x * (j / (float)(noiseSize - 1) + offset.x);
float y = scale.y * (i / (float)(noiseSize - 1) + offset.y);
int pixelIndex = i * noiseSize + j;
float noise = Mathf.PerlinNoise(x, y);
noiseTexpixels [pixelIndex] [channelIndex] = (noise - 0.5f) * strength + bending;
previewTexPixels [pixelIndex] = new Color(noise, noise, noise);
}
}
noiseTex.SetPixels(noiseTexpixels);
noiseTex.Apply();
noisePreviewTex.SetPixels(previewTexPixels);
noisePreviewTex.Apply();
noiseTexture.textureValue = noiseTex;
}
void DrawNoisePreview(NoiseTextureImageChannel channel, MaterialProperty scaleOffsetProperty, MaterialProperty strengthProperty, MaterialProperty amountOfBending = null)
{
Vector4 scaleOffset = scaleOffsetProperty.vectorValue;
Vector2 scale = new Vector2(scaleOffset.x, scaleOffset.y);
Vector2 offset = new Vector2(scaleOffset.z, scaleOffset.w);
Rect totalRect = EditorGUILayout.GetControlRect(true, MaterialEditor.GetDefaultPropertyHeight(noiseTexture), EditorStyles.layerMaskField);
Rect previewRect = totalRect;
previewRect.xMin = previewRect.xMax - EditorGUIUtility.fieldWidth;
Rect fieldsRect = totalRect;
fieldsRect.yMin += 16f;
fieldsRect.xMax -= EditorGUIUtility.fieldWidth + 2f;
Rect scaleFieldRect = new Rect(fieldsRect.x, fieldsRect.y, fieldsRect.width, 16f);
Rect offsetFieldRect = new Rect(fieldsRect.x, scaleFieldRect.y + 16f, fieldsRect.width, 16f);
Rect strengthFieldRect = new Rect(fieldsRect.x, offsetFieldRect.y + 16f, fieldsRect.width, 16f);
GUI.DrawTexture(previewRect, noiseTexturePreviews [(int)channel], ScaleMode.ScaleToFit);
EditorGUI.BeginChangeCheck();
EditorGUIUtility.labelWidth = 65f;
scaleFieldRect = EditorGUI.PrefixLabel(scaleFieldRect, Styles.NoiseScaleLabel);
Vector2 newScale = EditorGUI.Vector2Field(scaleFieldRect, GUIContent.none, scale);
offsetFieldRect = EditorGUI.PrefixLabel(offsetFieldRect, Styles.NoiseOffsetLabel);
Vector2 newOffset = EditorGUI.Vector2Field(offsetFieldRect, GUIContent.none, offset);
strengthFieldRect = EditorGUI.PrefixLabel(strengthFieldRect, Styles.NoiseStrengthLabel);
EditorGUI.showMixedValue = strengthProperty.hasMixedValue;
float strength = EditorGUI.Slider(strengthFieldRect, strengthProperty.floatValue, strengthProperty.rangeLimits.x, strengthProperty.rangeLimits.y);
EditorGUI.showMixedValue = false;
EditorGUIUtility.labelWidth = 0f;
if (EditorGUI.EndChangeCheck())
{
scaleOffsetProperty.vectorValue = new Vector4(newScale.x, newScale.y, newOffset.x, newOffset.y);
strengthProperty.floatValue = strength;
GenerateNoise(channel, scaleOffsetProperty, strengthProperty, amountOfBending);
}
}
