/// <summary>
/// Executes the modifiers in order and generates the necessary splatmaps
/// </summary>
/// <param name="layer"></param>
/// <param name="modifiers"></param>
/// <param name="output"></param>
public static void Execute(Terrain terrain, TerrainLayer layer, List <Modifier> modifiers)
{
Graphics.ClearRandomWriteTargets();
Graphics.SetRenderTarget(alphaMap);
//Start with a full white base
Graphics.Blit(Texture2D.whiteTexture, alphaMap);
//Reverse order
for (int i = modifiers.Count - 1; i >= 0; i--)
{
modifiers[i].Configure(filterMat);
modifiers[i].Execute(alphaMap);
}
//Scale splatmap to fit in terrain
Vector2 scaledSplatmapSize = new Vector2((terrain.terrainData.size.x / m_resolution) * m_resolution, (terrain.terrainData.size.z / m_resolution) * m_resolution);
//PaintContext handles creation of splatmaps. Subtracting the weights of a splatmap, from the ones before it.
//A single pixels of all combined alpha maps must not exceed a value of one. The 2nd pass of Hidden/TerrainEngine/TerrainLayerUtils is used internally to do this
//Note: Paintcontext must use a serialized terrain reference, otherwise breaks when executing "ApplyDelayedActions" when the project is saved!
PaintContext c = TerrainPaintUtility.BeginPaintTexture(terrain, new Rect(0, 0, scaledSplatmapSize.x, scaledSplatmapSize.y), layer);
Graphics.Blit(alphaMap, c.destinationRenderTexture);
TerrainPaintUtility.EndPaintTexture(c, "Painted terrain");
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), m_SelectedTerrainLayer);
if (paintContext == null)
{
return(false);
}
Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
// apply brush
float targetAlpha = 1.0f; // always 1.0 now -- no subtractive painting (we assume this in the ScatterAlphaMap)
Vector4 brushParams = new Vector4(editContext.brushStrength, targetAlpha, 0.0f, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, (int)TerrainPaintUtility.BuiltinPaintMaterialPasses.PaintTexture);
TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Texture");
return(true);
}
public void Release(PaintContext paintContext)
{
if (ReferenceEquals(paintContext, m_HeightmapContext))
{
if (m_WriteToHeightmap)
{
TerrainPaintUtility.EndPaintHeightmap(m_HeightmapContext, $"{m_Name} - Heightmap");
}
else
{
TerrainPaintUtility.ReleaseContextResources(m_HeightmapContext);
}
m_HeightmapContext = null;
}
else if (ReferenceEquals(paintContext, m_NormalmapContext))
{
TerrainPaintUtility.ReleaseContextResources(m_NormalmapContext);
m_NormalmapContext = null;
}
else if (ReferenceEquals(paintContext, m_TextureContext))
{
if (m_WriteToTexture)
{
TerrainPaintUtility.EndPaintTexture(m_TextureContext, $"{m_Name} - Texture");
}
else
{
TerrainPaintUtility.ReleaseContextResources(m_TextureContext);
}
m_TextureContext = null;
}
}
private bool PaintTexture(Terrain terrain, IOnPaint editContext, Vector2 currUV)
{
// the brush size is relative to the main brush size
float brushSize = editContext.brushSize * paintBrushSize / 100f;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, currUV, brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), m_SelectedInnerTerrainLayer);
if (paintContext == null)
{
return(false);
}
Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
float targetAlpha = 1.0f; // always 1.0 now -- no subtractive painting (we assume this in the ScatterAlphaMap)
float brushStrength = paintBrushStrength / 100f; // editContext.brushStrength
// apply brush
Vector4 brushParams = new Vector4(brushStrength, targetAlpha, 0.0f, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, (int)TerrainPaintUtility.BuiltinPaintMaterialPasses.PaintTexture);
TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Texture");
return(true);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform targetBrushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 1);
Material mat = GetPaintMaterial();
Vector4 brushParams = new Vector4(editContext.brushStrength, 0, 0, 0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
Rect targetRect = targetBrushXform.GetBrushXYBounds();
int numSampleTerrainLayers = terrain.terrainData.terrainLayers.Length;
for (int i = 0; i < numSampleTerrainLayers; ++i)
{
TerrainLayer layer = terrain.terrainData.terrainLayers[i];
if (layer == null)
{
continue;
}
int layerIndex = TerrainPaintUtility.FindTerrainLayerIndex(terrain, layer);
Texture2D layerTexture = TerrainPaintUtility.GetTerrainAlphaMapChecked(terrain, layerIndex >> 2);
PaintContext targetContext = PaintContext.CreateFromBounds(terrain, targetRect, layerTexture.width, layerTexture.height);
targetContext.CreateRenderTargets(RenderTextureFormat.R8);
targetContext.GatherAlphamap(layer, true);
Graphics.Blit(targetContext.sourceRenderTexture, targetContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintTexture(targetContext, "Terrain Paint - Smooth Splatmaps");
}
return(false);
}
private void PaintAlphamap(Rect writeBrushRect, Terrain terrain, Material mat)
{
// paint each layer from the sample to the clone location (adds layer if not present already)
for (int i = 0; i < m_Sample.m_Terrain.terrainData.terrainLayers.Length; ++i)
{
TerrainPaintUtility.PaintContext write = TerrainPaintUtility.BeginPaintTexture(terrain,
writeBrushRect,
m_Sample.m_Terrain.terrainData.terrainLayers[i]);
if (write == null)
{
continue;
}
// read created manually to force read to not add the layer if it wasnt already on the terrain, and to use write's rect with offset
TerrainPaintUtility.PaintContext read = new TerrainPaintUtility.PaintContext();
read.brushRect = new RectInt(write.brushRect.position + m_CloneRectPixelOffsetFromStampRect, write.brushRect.size);
// TODO(wyatt): Uncomment this once Andrew's API changes make it to trunk
read.CreateTerrainTiles(m_Sample.m_Terrain,
m_Sample.m_Terrain.terrainData.alphamapWidth,
m_Sample.m_Terrain.terrainData.alphamapHeight);
read.CreateRenderTargets(RenderTextureFormat.R8);
read.GatherAlphamap(m_Sample.m_Terrain, m_Sample.m_Terrain.terrainData.terrainLayers[i], false);
// render mix of clone and stamp areas
StampRender(read, write, mat, (int)ShaderPasses.CloneAlphamap);
TerrainPaintUtility.ReleaseContextResources(read);
TerrainPaintUtility.EndPaintTexture(write, "Terrain Paint - Clone Stamp Tool (Alphamap layer " + i + ")");
}
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
if (splatPaintRules == null)
{
return(false);
}
Material mat = GetPaintMaterial();
mat.SetTexture("_BrushTex", editContext.brushTexture);
// gathering heightmap
BrushTransform brushXformForGatheringHeightmap = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContextForGatheringHeightmap = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXformForGatheringHeightmap.GetBrushXYBounds(), 1);
if (paintContextForGatheringHeightmap == null)
{
return(false);
}
RenderTexture gatheredHeightmap = RenderTexture.GetTemporary(terrain.terrainData.heightmapTexture.descriptor);
Graphics.Blit(paintContextForGatheringHeightmap.sourceRenderTexture, gatheredHeightmap); //, TerrainPaintUtility.GetBlitMaterial(), 0);
TerrainPaintUtility.ReleaseContextResources(paintContextForGatheringHeightmap);
// painting alphamap
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), m_SelectedTerrainLayer);
if (paintContext == null)
{
return(false);
}
float targetAlpha = 1.0f; // always 1.0 now -- no subtractive painting (we assume this in the ScatterAlphaMap)
Vector4 brushParams = new Vector4(editContext.brushStrength, targetAlpha, splatPaintRules.useHeightTransition ? 1f : 0f, splatPaintRules.useAngleTransition ? 1f : 0f);
Vector4 paintRulesParametersHeight = new Vector4(splatPaintRules.minHeightStart, splatPaintRules.minHeightEnd, splatPaintRules.maxHeightStart, splatPaintRules.maxHeightEnd);
Vector4 paintRulesParametersAngle = new Vector4(splatPaintRules.minAngleStart, splatPaintRules.minAngleEnd, splatPaintRules.maxAngleStart, splatPaintRules.maxAngleEnd);
Vector4 paintRulesInversionAndUsage = new Vector4(splatPaintRules.inverseHeightRule ? 1f : 0f, splatPaintRules.inverseAngleRule ? 1f : 0f, splatPaintRules.applyHeightRule ? 1f : 0f, splatPaintRules.applyAngleRule ? 1f : 0f);
mat.SetVector("_BrushParams", brushParams);
mat.SetVector("_TerrainSize", (Vector4)terrain.terrainData.size);
mat.SetVector("_PaintRulesParametersHeight", paintRulesParametersHeight);
mat.SetVector("_PaintRulesParametersAngle", paintRulesParametersAngle);
mat.SetVector("_PaintRulesInversionAndUsage", paintRulesInversionAndUsage);
mat.SetTexture("_Heightmap", gatheredHeightmap);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Texture");
RenderTexture.ReleaseTemporary(gatheredHeightmap);
return(true);
}
/// <summary>
/// Executes the modifiers in order and generates the necessary splatmaps
/// </summary>
/// <param name="layer"></param>
/// <param name="modifiers"></param>
/// <param name="output"></param>
public static void ProcessSingleLayer(Terrain terrain, LayerSettings settings)
{
//Disable or with no settings (result in a fill with black)
if (settings.enabled == false)
{
return;
}
Graphics.SetRenderTarget(alphaMap);
//Start with a full white base
Graphics.Blit(Texture2D.whiteTexture, alphaMap);
//Reverse order
for (int i = settings.modifierStack.Count - 1; i >= 0; i--)
{
settings.modifierStack[i].Configure(filterMat);
settings.modifierStack[i].Execute(alphaMap);
}
//Scale splatmap to fit in terrain
Vector2 scaledSplatmapSize = new Vector2((terrain.terrainData.size.x / m_resolution) * m_resolution, (terrain.terrainData.size.z / m_resolution) * m_resolution);
//PaintContext handles creation of splatmaps. Subtracting the weights of a splatmap, from the ones before it.
//A single pixels of all combined alpha maps must not exceed a value of one. The 2nd pass of Hidden/TerrainEngine/TerrainLayerUtils is used internally to do this
//Note: Paintcontext must use a serialized terrain reference, otherwise breaks when executing "ApplyDelayedActions" when the project is saved!
PaintContext c = TerrainPaintUtility.BeginPaintTexture(terrain, new Rect(0, 0, scaledSplatmapSize.x, scaledSplatmapSize.y), settings.layer);
Graphics.Blit(alphaMap, c.destinationRenderTexture);
TerrainPaintUtility.EndPaintTexture(c, UndoActionName);
}
public void Release(PaintContext paintContext)
{
if (ReferenceEquals(paintContext, m_HeightmapContext))
{
if (m_WriteToHeightmap)
{
TerrainPaintUtility.EndPaintHeightmap(m_HeightmapContext, $"{m_Name} - Heightmap");
}
else
{
TerrainPaintUtility.ReleaseContextResources(m_HeightmapContext);
}
m_HeightmapContext = null;
}
else if (ReferenceEquals(paintContext, m_NormalmapContext))
{
TerrainPaintUtility.ReleaseContextResources(m_NormalmapContext);
m_NormalmapContext = null;
}
else if (ReferenceEquals(paintContext, m_TextureContext))
{
if (m_WriteToTexture)
{
TerrainPaintUtility.EndPaintTexture(m_TextureContext, $"{m_Name} - Texture");
}
else
{
TerrainPaintUtility.ReleaseContextResources(m_TextureContext);
}
m_TextureContext = null;
}
#if UNITY_2019_3_OR_NEWER
else if (ReferenceEquals(paintContext, m_HolesContext))
{
if (m_WriteToHoles)
{
TerrainPaintUtility.EndPaintHoles(m_HolesContext, "Terrain Paint - Paint Holes");
}
else
{
TerrainPaintUtility.ReleaseContextResources(m_HolesContext);
}
m_HolesContext = null;
}
#endif
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
Rect brushRect = TerrainPaintUtility.CalculateBrushRectInTerrainUnits(terrain, editContext.uv, editContext.brushSize);
TerrainPaintUtility.PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushRect, m_SelectedTerrainLayer);
if (paintContext == null)
{
return(false);
}
Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
// apply brush
Vector4 brushParams = new Vector4(editContext.brushStrength, m_SplatAlpha, 0.0f, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, (int)TerrainPaintUtility.BuiltinPaintMaterialPasses.PaintTexture);
TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Texture");
return(true);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
commonUI.OnPaint(terrain, editContext);
if (!commonUI.allowPaint)
{
return(true);
}
if (Event.current.type == EventType.MouseDown)
{
m_PrevBrushPos = editContext.uv;
return(false);
}
if (Event.current.type == EventType.MouseDrag && m_PreviousEvent == EventType.MouseDrag)
{
Vector2 uv = editContext.uv;
if (commonUI.ScatterBrushStamp(ref terrain, ref uv))
{
Material mat = GetPaintMaterial();
Vector2 smudgeDir = uv - m_PrevBrushPos;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, uv, commonUI.brushSize, commonUI.brushRotation);
Vector4 brushParams = new Vector4(commonUI.brushStrength, smudgeDir.x, smudgeDir.y, 0);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
//smudge splat map
if (m_AffectMaterials)
{
for (int i = 0; i < terrain.terrainData.terrainLayers.Length; i++)
{
TerrainLayer layer = terrain.terrainData.terrainLayers[i];
if (layer == null)
{
continue; // nothing to paint if the layer is NULL
}
PaintContext sampleContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), layer);
Graphics.Blit(sampleContext.sourceRenderTexture, sampleContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintTexture(sampleContext, "Terrain Paint - Twist Brush (Texture)");
}
}
//smudge the height map
if (m_AffectHeight)
{
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Twist Brush (Height)");
}
m_PrevBrushPos = uv;
}
}
m_PreviousEvent = Event.current.type;
return(false);
}
public static void EndFillTexture(PaintContext ctx, string editorUndoString)
{
TerrainPaintUtility.EndPaintTexture(ctx, editorUndoString);
}
private bool DoPaint(Terrain terrain, float brushStrength, Texture brushTexture, Rect rect, BrushTransform brushXform)
{
if (disablePaint)
{
return(false);
}
m_SelectedTerrainLayer = terrain.terrainData.terrainLayers[m_textureIndex];
PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, rect, m_SelectedTerrainLayer);
if (paintContext == null)
{
return(false);
}
PaintContext heightContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, rect, 1);
if (heightContext == null)
{
return(false);
}
if (terrain.normalmapTexture == null)
{
Debug.Log("Please check the Draw Instanced option under terrain settings to use this tool");
return(false);
}
PaintContext normalContext = TerrainPaintUtility.CollectNormals(terrain, rect, 0);
Material mat = GetPaintMaterial();
float extent = textureParams[m_textureIndex].heightExtent;
float blend = textureParams[m_textureIndex].heightBlend;
float height = textureParams[m_textureIndex].heightMaxPoint;
if (textureParams[m_textureIndex].heightRelative)
{
extent /= relativeHeightMult;
height /= relativeHeightMult;
}
else
{
extent /= terrain.terrainData.size.y;
height /= terrain.terrainData.size.y;
}
Vector4 brushParams = new Vector4(brushStrength, height,
textureParams[m_textureIndex].heightMask ? extent * (1.0f - blend) : 10000.0f, extent * blend);
extent = textureParams[m_textureIndex].slopeExtent;
blend = textureParams[m_textureIndex].slopeBlend;
Vector4 slopeParams = new Vector4(textureParams[m_textureIndex].slopeMaxPoint,
textureParams[m_textureIndex].slopeMask ? extent * (1.0f - blend) : 1.0f, extent * blend, textureParams[m_textureIndex].maxValue);
PaintContext maskContext = null;
if (textureParams[m_textureIndex].textureMask || textureParams[m_textureIndex].textureStencil)
{
TerrainLayer maskTerrainLayer = terrain.terrainData.terrainLayers[textureParams[m_textureIndex].textureMask ? textureParams[m_textureIndex].maskIndex : textureParams[m_textureIndex].stencilIndex];
maskContext = TerrainPaintUtility.BeginPaintTexture(terrain, rect, maskTerrainLayer);
if (maskContext == null)
{
return(false);
}
mat.SetTexture("_MaskTex", maskContext.sourceRenderTexture);
}
mat.SetInt("_MaskStencil", textureParams[m_textureIndex].textureMask ? 1 : (textureParams[m_textureIndex].textureStencil ? 2 : 0));
mat.SetTexture("_BrushTex", brushTexture);
mat.SetTexture("_HeightTex", heightContext.sourceRenderTexture);
mat.SetTexture("_NormalTex", normalContext.sourceRenderTexture);
mat.SetVector("_BrushParams", brushParams);
mat.SetVector("_SlopeParams", slopeParams);
mat.SetFloat("_FeatureSize", textureParams[m_textureIndex].heightRelative?textureParams[m_textureIndex].heightFeatureSize:0.0f);
if (brushTexture == null)
{
mat.SetFloat("_AspectRatio", terrain.terrainData.size.x / terrain.terrainData.size.z);
}
else
{
mat.SetFloat("_AspectRatio", (float)paintContext.sourceRenderTexture.height / (float)paintContext.sourceRenderTexture.width);
}
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Masked Texture");
TerrainPaintUtility.ReleaseContextResources(heightContext);
TerrainPaintUtility.ReleaseContextResources(normalContext);
if (maskContext != null)
{
TerrainPaintUtility.ReleaseContextResources(maskContext);
}
return(true);
}
