public override bool OnPaint(Terrain terrain, IOnPaint editContext) { commonUI.OnPaint(terrain, editContext); if (commonUI.allowPaint) { Texture brushTexture = editContext.brushTexture; using (IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "Twist", brushTexture)) { if (brushRender.CalculateBrushTransform(out BrushTransform brushXform)) { float finalTwistAmount = m_TwistAmount * -0.001f; //scale to a reasonable value and negate so default mode is clockwise if (Event.current.shift) { finalTwistAmount *= -1.0f; } Material mat = GetPaintMaterial(); Vector4 brushParams = new Vector4(commonUI.brushStrength, 0.0f, finalTwistAmount, 0.0f); mat.SetTexture("_BrushTex", editContext.brushTexture); mat.SetVector("_BrushParams", brushParams); //twist splat map if (m_AffectMaterials) { for (int i = 0; i < terrain.terrainData.terrainLayers.Length; i++) { TerrainLayer layer = terrain.terrainData.terrainLayers[i]; PaintContext paintContext = brushRender.AcquireTexture(true, brushXform.GetBrushXYBounds(), layer); var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat); Utility.SetFilterRT(commonUI, paintContext.sourceRenderTexture, brushMask, mat); paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear; brushRender.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat); brushRender.RenderBrush(paintContext, mat, 0); brushRender.Release(paintContext); RTUtils.Release(brushMask); } } //twist height map if (m_AffectHeight) { PaintContext paintContext = brushRender.AcquireHeightmap(true, brushXform.GetBrushXYBounds(), 1); var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat); Utility.SetFilterRT(commonUI, paintContext.sourceRenderTexture, brushMask, mat); paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear; ApplyBrushInternal(brushRender, paintContext, commonUI.brushStrength, finalTwistAmount, brushTexture, brushXform); brushRender.Release(paintContext); RTUtils.Release(brushMask); } } } } return(false); }
public override bool OnPaint(Terrain terrain, IOnPaint editContext) { commonUI.OnPaint(terrain, editContext); if (!commonUI.allowPaint) { return(true); } Vector2 uv = editContext.uv; if (commonUI.ScatterBrushStamp(ref terrain, ref uv)) { using (IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "WindErosion", editContext.brushTexture)) { if (brushRender.CalculateBrushTransform(out BrushTransform brushXform)) { var brushBounds = brushXform.GetBrushXYBounds(); PaintContext paintContext = brushRender.AcquireHeightmap(true, brushBounds, 4); paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear; //paintContext.sourceRenderTexture = input heightmap //Add Velocity (user wind direction and strength, or texture input, noise, forces, drag etc...) float angle = commonUI.brushRotation; //m_WindAngleDegrees + r; float r = 0.5f * (2.0f * UnityEngine.Random.value - 1.0f) * 0.01f * m_Eroder.m_WindSpeedJitter; float speed = m_Eroder.m_WindSpeed.value + r; float rad = angle * Mathf.Deg2Rad; m_Eroder.m_WindVel = speed * (new Vector4(-Mathf.Sin(rad), Mathf.Cos(rad), 0.0f, 0.0f)); m_Eroder.inputTextures["Height"] = paintContext.sourceRenderTexture; var heightRT = RTUtils.GetTempHandle(RTUtils.GetDescriptorRW((int)brushBounds.width, (int)brushBounds.height, 0, RenderTextureFormat.RFloat)); Vector2 texelSize = new Vector2(terrain.terrainData.size.x / terrain.terrainData.heightmapResolution, terrain.terrainData.size.z / terrain.terrainData.heightmapResolution); m_Eroder.ErodeHeightmap(heightRT, terrain.terrainData.size, brushBounds, texelSize); //Blit the result onto the new height map Material mat = GetPaintMaterial(); var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat); Utility.SetFilterRT(commonUI, paintContext.sourceRenderTexture, brushMask, mat); Vector4 brushParams = new Vector4(commonUI.brushStrength, 0.0f, 0.0f, 0.0f); mat.SetTexture("_BrushTex", editContext.brushTexture); mat.SetTexture("_NewHeightTex", heightRT); mat.SetVector("_BrushParams", brushParams); brushRender.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat); brushRender.RenderBrush(paintContext, mat, 0); brushRender.Release(paintContext); RTUtils.Release(brushMask); RTUtils.Release(heightRT); } } } return(true); }