221 lines
11 KiB
C#
221 lines
11 KiB
C#
using UnityEngine;
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using UnityEngine.TerrainTools;
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using UnityEditor.ShortcutManagement;
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using UnityEditor.TerrainTools.Erosion;
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namespace UnityEditor.TerrainTools
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{
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internal class HydroErosionTool : TerrainPaintTool<HydroErosionTool>
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{
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#if UNITY_2019_1_OR_NEWER
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[Shortcut("Terrain/Select Hydraulic Erosion Brush", typeof(TerrainToolShortcutContext), KeyCode.F4)] // tells shortcut manager what to call the shortcut and what to pass as args
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static void SelectShortcut(ShortcutArguments args)
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{
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TerrainToolShortcutContext context = (TerrainToolShortcutContext)args.context; // gets interface to modify state of TerrainTools
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context.SelectPaintTool<HydroErosionTool>(); // set active tool
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TerrainToolsAnalytics.OnShortcutKeyRelease("Select Hydraulic Erosion Brush");
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}
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#endif
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[SerializeField]
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IBrushUIGroup m_commonUI;
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private IBrushUIGroup commonUI {
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get
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{
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if (m_commonUI == null)
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{
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m_commonUI = new ErosionBrushUIGroup(
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"HydroErosion",
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UpdateAnalyticParameters,
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DefaultBrushUIGroup.Feature.All,
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new DefaultBrushUIGroup.FeatureDefaults { Strength = 0.52f }
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);
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m_commonUI.OnEnterToolMode();
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}
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return m_commonUI;
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}
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}
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NoiseSettings m_HardnessNoiseSettings = null;
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Erosion.HydraulicEroder m_Eroder = null;// = new Erosion.HydraulicEroder();
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Material m_Material = null;
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Material GetPaintMaterial()
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{
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if (m_Material == null)
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m_Material = new Material(Shader.Find("Hidden/TerrainTools/SimpleHeightBlend"));
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return m_Material;
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}
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public override void OnEnable()
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{
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base.OnEnable();
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m_Eroder = new Erosion.HydraulicEroder();
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m_Eroder.OnEnable();
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}
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public override string GetName()
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{
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return "Erosion/Hydraulic";
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}
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public override string GetDescription()
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{
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return "Simulates the effect of water transporting and redistributing sediment.";
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}
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public override void OnSceneGUI(Terrain terrain, IOnSceneGUI editContext)
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{
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commonUI.OnSceneGUI2D(terrain, editContext);
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// only do the rest if user mouse hits valid terrain or they are using the
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// brush parameter hotkeys to resize, etc
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if (!editContext.hitValidTerrain && !commonUI.isInUse)
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{
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return;
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}
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// update brush UI group
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commonUI.OnSceneGUI(terrain, editContext);
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// dont render preview if this isnt a repaint. losing performance if we do
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if (Event.current.type != EventType.Repaint)
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{
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return;
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}
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using (IBrushRenderPreviewUnderCursor brushRender = new BrushRenderPreviewUIGroupUnderCursor(commonUI, "HydroErosion", editContext.brushTexture))
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{
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if (brushRender.CalculateBrushTransform(out BrushTransform brushXform))
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{
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Material previewMaterial = Utility.GetDefaultPreviewMaterial(commonUI.hasEnabledFilters);
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PaintContext ctx = brushRender.AcquireHeightmap(false, brushXform.GetBrushXYBounds(), 1);
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var texelCtx = Utility.CollectTexelValidity(ctx.originTerrain, brushXform.GetBrushXYBounds());
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Utility.SetupMaterialForPaintingWithTexelValidityContext(ctx, texelCtx, brushXform, previewMaterial);
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var filterRT = RTUtils.GetTempHandle(ctx.sourceRenderTexture.width, ctx.sourceRenderTexture.height,
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0, FilterUtility.defaultFormat);
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Utility.GenerateAndSetFilterRT(commonUI, ctx.sourceRenderTexture, filterRT, previewMaterial);
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TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainBrushPreviewMode.SourceRenderTexture,
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editContext.brushTexture, brushXform, previewMaterial, 0);
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texelCtx.Cleanup();
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RTUtils.Release(filterRT);
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}
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}
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}
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public override void OnInspectorGUI(Terrain terrain, IOnInspectorGUI editContext)
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{
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if (m_HardnessNoiseSettings == null)
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{
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m_HardnessNoiseSettings = ScriptableObject.CreateInstance<NoiseSettings>();
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m_HardnessNoiseSettings.Reset();
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}
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Erosion.HydraulicErosionSettings erosionSettings = ((Erosion.HydraulicEroder)m_Eroder).m_ErosionSettings;
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EditorGUI.BeginChangeCheck();
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commonUI.OnInspectorGUI(terrain, editContext);
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m_Eroder.OnInspectorGUI(terrain, editContext);
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commonUI.validationMessage = TerrainToolGUIHelper.ValidateAndGenerateSceneGUIMessage(terrain);
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if (EditorGUI.EndChangeCheck())
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{
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Save(true);
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TerrainToolsAnalytics.OnParameterChange();
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}
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}
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public override void OnEnterToolMode()
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{
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base.OnEnterToolMode();
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commonUI.OnEnterToolMode();
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}
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public override void OnExitToolMode()
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{
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base.OnExitToolMode();
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commonUI.OnExitToolMode();
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}
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public override bool OnPaint(Terrain terrain, IOnPaint editContext)
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{
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commonUI.OnPaint(terrain, editContext);
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if (!commonUI.allowPaint)
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{ return true; }
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using (IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "HydroErosion", editContext.brushTexture))
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{
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if (brushRender.CalculateBrushTransform(out BrushTransform brushXform))
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{
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var brushBounds = brushXform.GetBrushXYBounds();
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PaintContext paintContext = brushRender.AcquireHeightmap(true, brushBounds, 1);
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paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
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m_Eroder.inputTextures["Height"] = paintContext.sourceRenderTexture;
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var heightRT = RTUtils.GetTempHandle(RTUtils.GetDescriptorRW((int)brushBounds.width, (int)brushBounds.height, 0, RenderTextureFormat.RFloat));
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Vector2 texelSize = new Vector2(terrain.terrainData.size.x / terrain.terrainData.heightmapResolution,
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terrain.terrainData.size.z / terrain.terrainData.heightmapResolution);
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m_Eroder.ErodeHeightmap(heightRT, terrain.terrainData.size, brushXform.GetBrushXYBounds(), texelSize, Event.current.control); // TODO(wyatt): commonUI.ModifierActive(BrushModifierKey.BRUSH_MOD_INVERT)
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Material mat = GetPaintMaterial();
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var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
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Utility.GenerateAndSetFilterRT(commonUI, paintContext.sourceRenderTexture, brushMask, mat);
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Vector4 brushParams = new Vector4(commonUI.brushStrength, 0.0f, 0.0f, 0.0f);
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mat.SetTexture("_BrushTex", editContext.brushTexture);
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mat.SetTexture("_NewHeightTex", heightRT);
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mat.SetVector("_BrushParams", brushParams);
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brushRender.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
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brushRender.RenderBrush(paintContext, mat, 0);
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RTUtils.Release(brushMask);
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RTUtils.Release(heightRT);
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}
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}
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return true;
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}
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private TerrainToolsAnalytics.IBrushParameter[] UpdateAnalyticParameters()
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{
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HydraulicErosionSettings settings = m_Eroder.m_ErosionSettings;
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return new TerrainToolsAnalytics.IBrushParameter[]{
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//Advanced Section
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_SimulationScale.text, Value = settings.m_SimScale.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_TimeDelta.text, Value = settings.m_HydroTimeDelta.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_NumIterations.text, Value = settings.m_HydroIterations.value},
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//Thermal Smoothing
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_ThermalDTScalar.text, Value = settings.m_ThermalTimeDelta},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_NumIterations.text, Value = settings.m_ThermalIterations},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_AngleOfRepose.text, Value = settings.m_ThermalReposeAngle},
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//Water Transport
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_PrecipitationRate.text, Value = settings.m_PrecipRate.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_EvaporationRate.text, Value = settings.m_EvaporationRate.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_FlowRate.text, Value = settings.m_FlowRate.value},
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//Sediment Transport
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_SedimentCap.text, Value = settings.m_SedimentCapacity.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_SedimentDeposit.text, Value = settings.m_SedimentDepositRate.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_SedimentDissolve.text, Value = settings.m_SedimentDissolveRate.value},
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//Riverbank
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_RiverbankDeposit.text, Value = settings.m_RiverBankDepositRate.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_RiverbankDissolve.text, Value = settings.m_RiverBankDissolveRate.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_RiverbedDeposit.text, Value = settings.m_RiverBedDepositRate.value},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_RiverbedDissolve.text, Value = settings.m_RiverBedDissolveRate.value},
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};
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}
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}
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}
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