private void PaintAlphamap(Terrain sampleTerrain, Terrain targetTerrain, BrushTransform sampleXform, BrushTransform targetXform, Material mat)
{
Rect sampleRect = sampleXform.GetBrushXYBounds();
Rect targetRect = targetXform.GetBrushXYBounds();
int numSampleTerrainLayers = sampleTerrain.terrainData.terrainLayers.Length;
for (int i = 0; i < numSampleTerrainLayers; ++i)
{
TerrainLayer layer = sampleTerrain.terrainData.terrainLayers[i];
if (layer == null)
{
continue; // nothing to paint if the layer is NULL
}
PaintContext sampleContext = TerrainPaintUtility.BeginPaintTexture(sampleTerrain, sampleRect, layer);
// manually create target context since we are possibly applying another terrain's layers and not its own
int layerIndex = TerrainPaintUtility.FindTerrainLayerIndex(sampleTerrain, layer);
Texture2D layerTexture = TerrainPaintUtility.GetTerrainAlphaMapChecked(sampleTerrain, layerIndex >> 2);
PaintContext targetContext = PaintContext.CreateFromBounds(targetTerrain, targetRect, layerTexture.width, layerTexture.height);
targetContext.CreateRenderTargets(RenderTextureFormat.R8);
targetContext.GatherAlphamap(layer, true);
sampleContext.sourceRenderTexture.filterMode = FilterMode.Point;
mat.SetTexture("_CloneTex", sampleContext.sourceRenderTexture);
Graphics.Blit(targetContext.sourceRenderTexture, targetContext.destinationRenderTexture, mat, (int)ShaderPasses.CloneAlphamap);
// apply texture modifications and perform cleanup. same thing as calling TerrainPaintUtility.EndPaintTexture
targetContext.ScatterAlphamap("Terrain Paint - Clone Brush (Texture)");
targetContext.Cleanup();
}
}
private void PaintHeightmap(Terrain sampleTerrain, Terrain targetTerrain, BrushTransform sampleXform,
BrushTransform targetXform, IOnPaint editContext, Material mat)
{
PaintContext sampleContext = TerrainPaintUtility.BeginPaintHeightmap(sampleTerrain, sampleXform.GetBrushXYBounds());
PaintContext targetContext = TerrainPaintUtility.BeginPaintHeightmap(targetTerrain, targetXform.GetBrushXYBounds());
ApplyHeightmap(sampleContext, targetContext, targetXform, targetTerrain, editContext.brushTexture, commonUI.brushStrength);
TerrainPaintUtility.EndPaintHeightmap(targetContext, "Terrain Paint - Clone Brush (Heightmap)");
// Restores RenderTexture.active
sampleContext.Cleanup();
targetContext.Cleanup();
}
private void DrawBrushPreviews(Terrain terrain, IOnSceneGUI editContext)
{
Vector2 sampleUV;
BrushTransform sampleXform;
PaintContext sampleContext = null;
Material previewMat = Utility.GetDefaultPreviewMaterial();
// draw sample location brush and create context data to be used when drawing target brush previews
if (m_SampleLocation.terrain != null)
{
sampleUV = TerrainUVFromBrushLocation(m_SampleLocation.terrain, m_SampleLocation.pos);
sampleXform = TerrainPaintUtility.CalculateBrushTransform(m_SampleLocation.terrain, sampleUV, commonUI.brushSize, commonUI.brushRotation);
sampleContext = TerrainPaintUtility.BeginPaintHeightmap(m_SampleLocation.terrain, sampleXform.GetBrushXYBounds());
var texelCtx = Utility.CollectTexelValidity(sampleContext.originTerrain, sampleXform.GetBrushXYBounds());
Utility.SetupMaterialForPaintingWithTexelValidityContext(sampleContext, texelCtx, sampleXform, previewMat);
TerrainPaintUtilityEditor.DrawBrushPreview(sampleContext, TerrainBrushPreviewMode.SourceRenderTexture,
editContext.brushTexture, sampleXform, previewMat, 0);
texelCtx.Cleanup();
}
// draw brush preview and mesh preview for current mouse position
if (commonUI.isRaycastHitUnderCursorValid)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, commonUI.raycastHitUnderCursor.textureCoord, commonUI.brushSize, commonUI.brushRotation);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
var texelCtx = Utility.CollectTexelValidity(ctx.originTerrain, brushXform.GetBrushXYBounds());
Utility.SetupMaterialForPaintingWithTexelValidityContext(ctx, texelCtx, brushXform, previewMat);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainBrushPreviewMode.SourceRenderTexture,
editContext.brushTexture, brushXform, previewMat, 0);
if (sampleContext != null && cloneToolProperties.m_PaintHeightmap)
{
ApplyHeightmap(sampleContext, ctx, brushXform, terrain, editContext.brushTexture, commonUI.brushStrength);
RenderTexture.active = ctx.oldRenderTexture;
previewMat.SetTexture("_HeightmapOrig", ctx.sourceRenderTexture);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainBrushPreviewMode.DestinationRenderTexture,
editContext.brushTexture, brushXform, previewMat, 1);
}
// Restores RenderTexture.active
ctx.Cleanup();
texelCtx.Cleanup();
}
// Restores RenderTexture.active
sampleContext?.Cleanup();
}
private void PaintAlphamap(Terrain sampleTerrain, Terrain targetTerrain, BrushTransform sampleXform, BrushTransform targetXform, Material mat)
{
Rect sampleRect = sampleXform.GetBrushXYBounds();
Rect targetRect = targetXform.GetBrushXYBounds();
int numSampleTerrainLayers = sampleTerrain.terrainData.terrainLayers.Length;
for (int i = 0; i < numSampleTerrainLayers; ++i)
{
TerrainLayer layer = sampleTerrain.terrainData.terrainLayers[i];
if (layer == null)
{
continue; // nothing to paint if the layer is NULL
}
PaintContext sampleContext = TerrainPaintUtility.BeginPaintTexture(sampleTerrain, sampleRect, layer);
int layerIndex = TerrainPaintUtility.FindTerrainLayerIndex(sampleTerrain, layer);
Texture2D layerTexture = TerrainPaintUtility.GetTerrainAlphaMapChecked(sampleTerrain, layerIndex >> 2);
PaintContext targetContext = PaintContext.CreateFromBounds(targetTerrain, targetRect, layerTexture.width, layerTexture.height);
targetContext.CreateRenderTargets(RenderTextureFormat.R8);
targetContext.GatherAlphamap(layer, true);
sampleContext.sourceRenderTexture.filterMode = FilterMode.Point;
mat.SetTexture("_CloneTex", sampleContext.sourceRenderTexture);
mat.SetVector("_SampleUVScaleOffset", ComputeSampleUVScaleOffset(sampleContext, targetContext));
var brushMask = RTUtils.GetTempHandle(targetContext.sourceRenderTexture.width, targetContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
Utility.SetFilterRT(commonUI, targetContext.sourceRenderTexture, brushMask, mat);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(targetContext, targetXform, mat);
Graphics.Blit(targetContext.sourceRenderTexture, targetContext.destinationRenderTexture, mat, (int)ShaderPasses.CloneAlphamap);
// apply texture modifications and perform cleanup. same thing as calling TerrainPaintUtility.EndPaintTexture
targetContext.ScatterAlphamap("Terrain Paint - Clone Brush (Texture)");
// Restores RenderTexture.active
targetContext.Cleanup();
RTUtils.Release(brushMask);
}
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
MaterialManager mgr = terrain.GetComponent <MaterialManager>();
if (mgr != null)
{
// IndexMap indexMap = mgr.GetIndexMap();
// RenderTexture rt= indexMap.GetTempRenderTexture(true);
paintInProgress = true;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext indexCtx = PaintContext.CreateFromBounds(terrain, brushXform.GetBrushXYBounds(), 64, 64, 1);
indexCtx.CreateRenderTargets(RenderTextureFormat.ARGB32);
PaintContext normalCtx = TerrainPaintUtility.CollectNormals(terrain, brushXform.GetBrushXYBounds(), 2);
Material blitMaterial = TerrainPaintUtility.GetBlitMaterial();
indexCtx.Gather(
TerrainToIndexMapTexture,
new Color(0.0f, 0.0f, 0.0f, 0.0f),
blitMaterial, 0,
null, // before
null); // after
// render source -> dest here
// RenderTexture.active = ctx.oldRenderTexture;
Material paintMaterial = GetPaintMaterial();
float brushStrength = Event.current.shift ? -editContext.brushStrength : editContext.brushStrength;
Vector4 brushParams = new Vector4(
brushStrength,
0.0f,
0.0f, 0.0f);
paintMaterial.SetTexture("_BrushTex", editContext.brushTexture);
paintMaterial.SetVector("_BrushParams", brushParams);
paintMaterial.SetFloat("materialIndex", materialIndex);
paintMaterial.SetTexture("_NormalMap", normalCtx.sourceRenderTexture);
Vector4 indexToNormalXform;
TerrainPaintUtility.BuildTransformPaintContextUVToPaintContextUV(
indexCtx,
normalCtx,
out indexToNormalXform);
paintMaterial.SetVector("_indexToNormalXform", indexToNormalXform);
Vector4 xformParams = new Vector4();
xformParams.x = (randomRotation ? minRotation : fixedRotation) / 360.0f;
xformParams.y = (randomRotation ? maxRotation : fixedRotation) / 360.0f;
paintMaterial.SetVector("_xformParams", xformParams);
Vector4 randoms = new Vector4(
UnityEngine.Random.Range(0.0f, 1.0f),
UnityEngine.Random.Range(0.0f, 1.0f),
UnityEngine.Random.Range(0.0f, 1.0f),
UnityEngine.Random.Range(0.0f, 1.0f));
paintMaterial.SetVector("_randoms", randoms);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(indexCtx, brushXform, paintMaterial);
Graphics.Blit(indexCtx.sourceRenderTexture, indexCtx.destinationRenderTexture, paintMaterial, 0);
// ctx.ScatterToTexture() // we should do this ... less temp render textures
// and users don't have to store render textures at all...
indexCtx.Scatter(
TerrainToIndexMapRenderTexture,
blitMaterial, 0,
null,
null);
normalCtx.Cleanup();
indexCtx.Cleanup();
}
/*
* 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);
}
