282 lines
12 KiB
C#
282 lines
12 KiB
C#
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using UnityEngine;
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using UnityEngine.Experimental.TerrainAPI;
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using UnityEditor.ShortcutManagement;
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namespace UnityEditor.Experimental.TerrainAPI
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{
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internal class ThermalErosionTool : TerrainPaintTool<ThermalErosionTool>, IValidationTests
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{
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#if UNITY_2019_1_OR_NEWER
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[Shortcut("Terrain/Select Thermal Erosion Tool", typeof(TerrainToolShortcutContext))] // 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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TerrainToolShortcutContext context = (TerrainToolShortcutContext)args.context; // gets interface to modify state of TerrainTools
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context.SelectPaintTool<ThermalErosionTool>(); // set active tool
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TerrainToolsAnalytics.OnShortcutKeyRelease("Select Thermal Erosion Tool");
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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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{
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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 DefaultBrushUIGroup( "ThermalErosion", UpdateAnalyticParameters );
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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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Erosion.ThermalEroder m_Eroder = null;
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public override void OnEnable() {
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base.OnEnable();
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m_Eroder = new Erosion.ThermalEroder();
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m_Eroder.OnEnable();
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}
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public override void OnEnterToolMode() {
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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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base.OnExitToolMode();
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commonUI.OnExitToolMode();
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}
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#region Resources
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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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Material m_SplatMaterial = null;
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Material GetSplatMaterial()
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{
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if (m_SplatMaterial == null)
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m_SplatMaterial = new Material(Shader.Find("Hidden/TerrainTools/SedimentSplat"));
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return m_SplatMaterial;
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}
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#endregion
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#region GUI
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public override string GetName()
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{
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return "Erosion/Thermal";
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}
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public override string GetDesc()
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{
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return "Thermal Erosion\n" +
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"Simulates thermal erosion from freezing / thawing processes, and the resulting avalanching of debris\n";
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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, "ThermalErosion", editContext.brushTexture))
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{
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if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
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{
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PaintContext ctx = brushRender.AcquireHeightmap(false, brushXform.GetBrushXYBounds(), 1);
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brushRender.RenderBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, brushXform, TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial(), 0);
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}
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}
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}
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bool m_ShowControls = true;
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bool m_ShowAdvancedUI = false;
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string[] m_MatNames = {
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"Custom",
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"Dry Ash", // 40
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"Chalk", // 45
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"Dry Clay", // 25 - 40
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"Wet Clay", // 15
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"Soil", // 30-45
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"Granite Scree", // 35 - 40
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"Gravel", //45 - 45
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"Dry Sand",
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"Wet Sand",
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"Quick Sand",
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"Snow"
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};
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float[,] m_TauValues = new float[,] {
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{ -1.0f, -1.0f }, //custom
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{ 38.0f, 42.0f }, //dry ash
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{ 45.0f, 45.0f }, //chalk
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{ 25.0f, 40.0f }, //dry clay (25 - 40)
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{ 15.0f, 15.0f }, //wet clay
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{ 30.0f, 45.0f }, //soil (30-45)
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{ 35.0f, 40.0f }, //crushed granite (35 - 40)
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{ 45.0f, 45.0f }, //gravel
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{ 32.0f, 36.0f }, //dry sand
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{ 45.0f, 45.0f }, //wet sand
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{ 15.0f, 30.0f }, //quicksand (15-30)
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{ 38.0f, 38.0f } //snow
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};
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public override void OnInspectorGUI(Terrain terrain, IOnInspectorGUI editContext)
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{
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EditorGUI.BeginChangeCheck();
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commonUI.OnInspectorGUI(terrain, editContext);
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commonUI.validationMessage = ValidateAndGenerateUserMessage(terrain);
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m_ShowControls = TerrainToolGUIHelper.DrawHeaderFoldoutForErosion(Erosion.Styles.m_ThermalErosionControls, m_ShowControls, m_Eroder.ResetTool);
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if (m_ShowControls) {
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EditorGUILayout.BeginVertical("GroupBox");
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EditorGUI.BeginChangeCheck();
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m_Eroder.m_MatPreset = EditorGUILayout.Popup(Erosion.Styles.m_MatPreset, m_Eroder.m_MatPreset, m_MatNames);
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if (EditorGUI.EndChangeCheck() && m_Eroder.m_MatPreset != 0) {
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m_Eroder.m_AngleOfRepose.x = m_TauValues[m_Eroder.m_MatPreset, 0];
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m_Eroder.m_AngleOfRepose.y = m_TauValues[m_Eroder.m_MatPreset, 1];
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}
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EditorGUI.indentLevel++;
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m_ShowAdvancedUI = TerrainToolGUIHelper.DrawSimpleFoldout(new GUIContent("Advanced"), m_ShowAdvancedUI);
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if (m_ShowAdvancedUI) {
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m_Eroder.m_ThermalIterations = EditorGUILayout.IntSlider(Erosion.Styles.m_NumIterations, m_Eroder.m_ThermalIterations, 1, 1000);
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m_Eroder.m_dt = EditorGUILayout.Slider(Erosion.Styles.m_TimeDelta, m_Eroder.m_dt, 0.00001f, 0.05f);
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EditorGUI.BeginChangeCheck();
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EditorGUILayout.MinMaxSlider(Erosion.Styles.m_AngleOfRepose, ref m_Eroder.m_AngleOfRepose.x, ref m_Eroder.m_AngleOfRepose.y, 0.0f, 90.0f);
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if (EditorGUI.EndChangeCheck()) {
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m_Eroder.m_MatPreset = 0; //we changed the angle of repose, so now we should switch the UI to "Custom"
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}
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m_Eroder.m_ReposeJitter = EditorGUILayout.IntSlider(Erosion.Styles.m_AngleOfReposeJitter, (int)m_Eroder.m_ReposeJitter, 0, 100);
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}
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EditorGUILayout.EndVertical();
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}
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if (EditorGUI.EndChangeCheck()) {
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Save(true);
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TerrainToolsAnalytics.OnParameterChange();
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}
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}
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#endregion
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#region Paint
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private void AddHeight(Terrain terrain, IOnPaint editContext) {
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using(IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "ThermalErosion", editContext.brushTexture))
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{
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if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
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{
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PaintContext paintContext = brushRender.AcquireHeightmap(true, brushXform.GetBrushXYBounds(), 1);
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paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
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Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
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float brushStrength = Event.current.shift ? -m_Eroder.m_AddHeightAmt : m_Eroder.m_AddHeightAmt;
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brushStrength *= (commonUI.brushStrength);
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if(Event.current.control) { brushStrength = 0.0f; }
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Vector4 brushParams = new Vector4(0.0001f * brushStrength, 0.0f, 0.0f, 0.0f);
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mat.SetTexture("_BrushTex", editContext.brushTexture);
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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, (int)TerrainPaintUtility.BuiltinPaintMaterialPasses.RaiseLowerHeight);
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}
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}
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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) { return false; }
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int[] numWorkGroups = { 8, 8, 1 };
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using(IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "ThermalErosion", editContext.brushTexture))
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{
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if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
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{
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PaintContext paintContext = brushRender.AcquireHeightmap(true, brushXform.GetBrushXYBounds(), 1);
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paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
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//figure out what size we need our render targets to be
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Rect brushRect = brushXform.GetBrushXYBounds();
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m_Eroder.inputTextures["Height"] = paintContext.sourceRenderTexture;
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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(terrain.terrainData.size, brushRect, texelSize);
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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.SetFilterRT(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", m_Eroder.outputTextures["Height"]);
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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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}
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}
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return true;
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}
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#endregion
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#region IValidationTests
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public virtual string ValidateAndGenerateUserMessage(Terrain terrain)
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{
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if (terrain.terrainData.heightmapResolution < 1025)
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return "Erosion tools work best with a heightmap resolution of 1025 or greater.";
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return "";
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}
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#endregion
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#region Analytics
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private TerrainToolsAnalytics.IBrushParameter[] UpdateAnalyticParameters() => new TerrainToolsAnalytics.IBrushParameter[]{
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new TerrainToolsAnalytics.BrushParameter<string>{Name = Erosion.Styles.m_MatPreset.text, Value = m_MatNames[m_Eroder.m_MatPreset]},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_NumIterations.text, Value = m_Eroder.m_ThermalIterations},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_TimeDelta.text, Value = m_Eroder.m_dt},
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new TerrainToolsAnalytics.BrushParameter<Vector2>{Name = Erosion.Styles.m_AngleOfRepose.text, Value = m_Eroder.m_AngleOfRepose},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_AngleOfReposeJitter.text, Value = m_Eroder.m_ReposeJitter},
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};
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#endregion
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}
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}
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