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); }