/// <summary>
/// Bakes 3D noise defined by the given NoiseSettings instance into a Texture3D instance and returns
/// a reference to it.
/// </summary>
/// <param name = "noise"> An instance of NoiseSettings defining the type of noise to bake </param>
/// <param name = "width"> The width of the baked Texture3D </param>
/// <param name = "height"> The height of the baked Texture3D </param>
/// <param name = "depth"> The depth of the baked Texture3D </param>
/// <param name = "format"> The GraphicsFormat for the baked Texture3D. In most cases, you will want to use GraphicsFormat.R16_UNorm </param>
/// <param name = "flags"> TextureCreation flags for the baked Texture3D. </param>
/// <returns> A reference to the baked Texture3D instance </returns>
/// <remarks>
/// Be careful when specifying TextureCreation flags. If you specify that mipmaps should be generated for
/// a Texture3D, that will use a lot more memory than if you were generating mipmaps for a Texture2D.
/// </remarks>
public static Texture3D BakeToTexture3D(NoiseSettings noise, int width, int height, int depth,
GraphicsFormat format = GraphicsFormat.R16_UNorm,
TextureCreationFlags flags = TextureCreationFlags.None)
{
Material mat = GetDefaultBlitMaterial(noise);
if (mat == null)
{
return(null);
}
RenderTexture sliceRT = RenderTexture.GetTemporary(width, height, 0, GraphicsFormat.R16_UNorm);
Texture2D slice2D = new Texture2D(width, height, format, flags);
Color[] colors = new Color[width * height * depth];
noise.SetupMaterial(mat);
int pass = NoiseLib.GetNoiseIndex(noise);
RenderTexture.active = sliceRT;
List <Color[]> sliceColors = new List <Color[]>(depth);
for (int i = 0; i < depth; ++i)
{
float uvy = ((float)i + 0.5f) / depth;
mat.SetFloat("_UVY", uvy);
Graphics.Blit(null, sliceRT, mat, pass * kNumBlitPasses + 1);
slice2D.ReadPixels(new Rect(0, 0, width, height), 0, 0);
sliceColors.Add(slice2D.GetPixels(0, 0, width, height));
}
int pixPerSlice = width * height;
for (int sliceID = 0; sliceID < sliceColors.Count; ++sliceID)
{
for (int pixelID = 0; pixelID < sliceColors[sliceID].Length; ++pixelID)
{
int pixel = (pixPerSlice * sliceID) + pixelID;
colors[pixel] = sliceColors[sliceID][pixelID];
}
}
bool mipChain = ((int)flags & (int)TextureCreationFlags.MipChain) != 0;
Texture3D texture = new Texture3D(width, height, depth, format, flags);
texture.SetPixels(colors);
texture.Apply(mipChain);
RenderTexture.active = null;
RenderTexture.ReleaseTemporary(sliceRT);
return(texture);
}
/// <summary>
/// Renders a Popup using EditorGUILayout.Popup for all loaded NoiseType implementations
/// </summary>
/// <param name="label"> Label prefix for the Popup </param>
/// <param name="selectedName"> The currently selected NoiseType name </param>
public static string NoiseTypePopup(GUIContent label, string selectedName)
{
string[] names = NoiseLib.GetNoiseNames();
int index = NoiseLib.GetNoiseIndex(selectedName);
index = index < 0 ? 0 : index;
int newIndex = EditorGUILayout.Popup(label, index, names);
string newName = names[newIndex];
if (newName.CompareTo(selectedName) != 0)
{
selectedName = newName;
}
return(selectedName);
}
protected override void OnEval(FilterContext fc, RenderTexture sourceRenderTexture, RenderTexture destinationRenderTexture)
{
if (m_noiseSettings == null)
{
m_noiseSettings = ScriptableObject.CreateInstance <NoiseSettings>();
}
m_noiseSettings.useTextureForPositions = m_useHeightmap;
if (m_useHeightmap)
{
m_noiseSettings.positionTexture = fc.rtHandleCollection[FilterContext.Keywords.Heightmap];
}
Vector3 brushPosWS = fc.brushPos - m_lastBrushPosition;
brushPosWS.y = 0;
m_lastBrushPosition = fc.brushPos;
float brushSize = fc.brushSize;
float brushRotation = fc.brushRotation - m_lastRotation;
m_lastRotation = fc.brushRotation;
// TODO(wyatt): remove magic number and tie it into NoiseSettingsGUI preview size somehow
float previewSize = 1 / 512f;
// get proper noise material from current noise settings
NoiseSettings noiseSettings = m_noiseSettings;
Material mat = NoiseUtils.GetDefaultBlitMaterial(noiseSettings);
// setup the noise material with values in noise settings
noiseSettings.SetupMaterial(mat);
// change pos and scale so they match the noiseSettings preview
bool isWorldSpace = false == m_isLocalSpace;
brushSize = isWorldSpace ? brushSize * previewSize : 1;
brushPosWS = isWorldSpace ? brushPosWS * previewSize : Vector3.zero;
// compensate for the difference between the size of the rotated brush and the square noise RT
var brushTransform = GetBrushTransform(fc);
var scaleMultiplier = new Vector2(
1.0f / (fc.brushSize / brushTransform.GetBrushXYBounds().width),
1.0f / (fc.brushSize / brushTransform.GetBrushXYBounds().height));
Quaternion rotQ = Quaternion.AngleAxis(-brushRotation, Vector3.up);
// accumulate transformation delta
m_noiseToWorld *= Matrix4x4.TRS(brushPosWS, rotQ, Vector3.one);
mat.SetMatrix(NoiseSettings.ShaderStrings.transform, noiseSettings.trs * m_noiseToWorld * Matrix4x4.Scale(new Vector3(scaleMultiplier.x, 1.0f, scaleMultiplier.y) * brushSize));
int pass = NoiseUtils.kNumBlitPasses * NoiseLib.GetNoiseIndex(noiseSettings.domainSettings.noiseTypeName);
var desc = destinationRenderTexture.descriptor;
desc.graphicsFormat = NoiseUtils.singleChannelFormat;
desc.sRGB = false;
RTHandle rt = RTUtils.GetTempHandle(desc);
Graphics.Blit(sourceRenderTexture, rt, mat, pass);
Material blendMat = FilterUtility.blendModesMaterial;
blendMat.SetTexture("_BlendTex", rt);
Graphics.Blit(sourceRenderTexture, destinationRenderTexture, blendMat, 1);
RTUtils.Release(rt);
}
/// <summary>
/// Blits 2D noise defined by the given NoiseSettings instance into the destination RenderTexture
/// using the provided Material.
/// </summary>
/// <param name = "noise"> An instance of NoiseSettings defining the type of noise to render </param>
/// <param name = "dest"> The destination RenderTexture that the noise will be rendered into. </param>
/// <param name = "mat"> The Material to be used for rendering the noise </param>
public static void Blit2D(NoiseSettings noise, RenderTexture dest, Material mat)
{
int pass = NoiseLib.GetNoiseIndex(noise.domainSettings.noiseTypeName);
INTERNAL_Blit2D(noise, dest, mat, pass * kNumBlitPasses + 0);
}
private void ApplyBrushInternal(Terrain terrain, PaintContext ctx, BrushTransform brushXform, Vector3 brushPosWS,
float brushRotation, float brushStrength, float brushSize, Texture brushTexture)
{
var prevRT = RenderTexture.active;
var brushPositionOffset = brushPosWS - m_lastBrushPosition;
m_lastBrushPosition = brushPosWS;
brushPositionOffset.y = 0;
var rotationDelta = brushRotation - m_lastRotation;
m_lastRotation = brushRotation;
//blit steps
//1. blit noise to intermediate RT, this includes all the noise transformations and filters,
//using the appropriate noise material. do this with NoiseUtils.Blit2D?
//2. use that noise texture and mult it with brushmask to paint height on terrain
// TODO(wyatt): remove magic number and tie it into NoiseSettingsGUI preview size somehow
float previewSize = 1 / 512f;
// get proper noise material from current noise settings
NoiseSettings noiseSettings = this.noiseSettings;
Material matNoise = NoiseUtils.GetDefaultBlitMaterial(noiseSettings);
// setup the noise material with values in noise settings
noiseSettings.SetupMaterial(matNoise);
// change pos and scale so they match the noiseSettings preview
bool isWorldSpace = (m_toolSettings.coordSpace == CoordinateSpace.World);
brushSize = isWorldSpace ? brushSize * previewSize : 1;
brushPositionOffset = isWorldSpace ? brushPositionOffset * previewSize : Vector3.zero;
var brushTransform = NoiseFilter.GetBrushTransform(rotationDelta, brushSize);
var scaleMultiplier = new Vector2(
1.0f / (brushSize / brushTransform.GetBrushXYBounds().width),
1.0f / (brushSize / brushTransform.GetBrushXYBounds().height));
// // override noise transform
Quaternion rotQ = Quaternion.AngleAxis(-rotationDelta, Vector3.up);
// accumulate transformation delta
m_noiseToWorld *= Matrix4x4.TRS(brushPositionOffset, rotQ, Vector3.one);
matNoise.SetMatrix(NoiseSettings.ShaderStrings.transform, noiseSettings.trs * m_noiseToWorld * Matrix4x4.Scale(new Vector3(scaleMultiplier.x, 1.0f, scaleMultiplier.y) * brushSize));
var noisePass = NoiseUtils.kNumBlitPasses * NoiseLib.GetNoiseIndex(noiseSettings.domainSettings.noiseTypeName);
// render the noise field to a texture
// TODO(wyatt): Handle the 3D case. Would need to blit to Volume Texture
var rtDesc = ctx.destinationRenderTexture.descriptor;
rtDesc.graphicsFormat = NoiseUtils.singleChannelFormat;
rtDesc.sRGB = false;
var noiseRT = RTUtils.GetTempHandle(rtDesc);
RenderTexture.active = noiseRT; // keep this
Graphics.Blit(noiseRT, matNoise, noisePass);
// then add the result to the heightmap using the noise height tool shader
Material matFinal = paintMaterial;
var brushMask = RTUtils.GetTempHandle(ctx.sourceRenderTexture.width, ctx.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
Utility.SetFilterRT(commonUI, ctx.sourceRenderTexture, brushMask, matFinal);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(ctx, brushXform, matFinal);
// set brush params
Vector4 brushParams = new Vector4(0.01f * brushStrength, 0.0f, brushSize, 1 / brushSize);
matFinal.SetVector("_BrushParams", brushParams);
matFinal.SetTexture("_BrushTex", brushTexture);
matFinal.SetTexture("_NoiseTex", noiseRT);
matFinal.SetVector("_WorldHeightRemap", m_toolSettings.worldHeightRemap);
Graphics.Blit(ctx.sourceRenderTexture, ctx.destinationRenderTexture, matFinal, 0);
RTUtils.Release(noiseRT);
RTUtils.Release(brushMask);
RenderTexture.active = prevRT;
}
