307 lines
13 KiB
C#
307 lines
13 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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//[FilePathAttribute("Library/TerrainTools/SetHeight", FilePathAttribute.Location.ProjectFolder)]
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internal class SetHeightTool : TerrainPaintTool<SetHeightTool>
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{
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private static bool s_showToolControls = true;
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#if UNITY_2019_1_OR_NEWER
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[Shortcut("Terrain/Select Set Height Tool", typeof(TerrainToolShortcutContext))]
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static void SelectShortcut(ShortcutArguments args) {
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TerrainToolShortcutContext context = (TerrainToolShortcutContext)args.context;
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context.SelectPaintTool<SetHeightTool>();
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TerrainToolsAnalytics.OnShortcutKeyRelease("Select Set Height 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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LoadSettings();
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m_commonUI = new DefaultBrushUIGroup("SetHeightTool", 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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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/SetExactHeight"));
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return m_Material;
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}
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const string toolName = "Set Height";
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[SerializeField]
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float m_TargetHeight;
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#if UNITY_2019_3_OR_NEWER
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private enum HeightSpace
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{
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World,
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Local
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}
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[SerializeField]
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HeightSpace m_HeightSpace;
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#endif
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private static class Styles
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{
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public static readonly GUIContent controlHeader = EditorGUIUtility.TrTextContent("Set Height Controls");
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public static readonly GUIContent description = EditorGUIUtility.TrTextContent("Left click to set the height.\n\nHold Ctrl and left click to sample the target height.");
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public static readonly GUIContent space = EditorGUIUtility.TrTextContent("Space", "The heightmap space in which the painting operates.");
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public static readonly GUIContent flattenAll = EditorGUIUtility.TrTextContent("Flatten all", "If selected, it will traverse all neighbors and flatten them too");
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public static readonly GUIContent height = EditorGUIUtility.TrTextContent("Height", "You can set the Height property manually or you can Ctrl-click on the terrain to sample the height at the mouse position (rather like the 'eyedropper' tool in an image editor).");
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public static readonly GUIContent flatten = EditorGUIUtility.TrTextContent("Flatten Tile", "The Flatten button levels the whole terrain to the chosen height.");
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}
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public override string GetName()
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{
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return toolName;
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}
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public override string GetDesc()
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{
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return Styles.description.text;
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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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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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Texture brushTexture = editContext.brushTexture;
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using(IBrushRenderPreviewUnderCursor brushRender = new BrushRenderPreviewUIGroupUnderCursor(commonUI, "SetHeightTool", brushTexture))
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{
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if(brushRender.CalculateBrushTransform(out BrushTransform brushTransform))
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{
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Rect brushBounds = brushTransform.GetBrushXYBounds();
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PaintContext paintContext = brushRender.AcquireHeightmap(false, brushBounds, 1);
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Material material = TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial();
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brushRender.RenderBrushPreview(paintContext, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, brushTransform, material, 0);
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// draw result preview
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{
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ApplyBrushInternal(paintContext, brushRender, commonUI.brushStrength, brushTexture, brushTransform, terrain);
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// restore old render target
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RenderTexture.active = paintContext.oldRenderTexture;
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material.SetTexture("_HeightmapOrig", paintContext.sourceRenderTexture);
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brushRender.RenderBrushPreview(paintContext, TerrainPaintUtilityEditor.BrushPreview.DestinationRenderTexture, brushTransform, material, 1);
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}
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}
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}
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}
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private void ApplyBrushInternal(PaintContext paintContext, IBrushRenderUnderCursor brushRender, float brushStrength, Texture brushTexture, BrushTransform brushTransform, Terrain terrain)
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{
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Material mat = GetPaintMaterial();
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#if UNITY_2019_3_OR_NEWER
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float brushTargetHeight = Mathf.Clamp01((m_TargetHeight - paintContext.heightWorldSpaceMin) / paintContext.heightWorldSpaceSize);
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Vector4 brushParams = new Vector4(brushStrength * 0.01f, PaintContext.kNormalizedHeightScale * brushTargetHeight, 0.0f, 0.0f);
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#else
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float terrainHeight = Mathf.Clamp01((m_TargetHeight - terrain.transform.position.y) / terrain.terrainData.size.y);
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Vector4 brushParams = new Vector4(brushStrength * 0.01f, 0.5f * terrainHeight, 0.0f, 0.0f);
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#endif
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var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
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commonUI.GetBrushMask(paintContext.sourceRenderTexture, brushMask);
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mat.SetTexture("_FilterTex", brushMask);
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mat.SetTexture("_BrushTex", brushTexture);
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mat.SetVector("_BrushParams", brushParams);
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brushRender.SetupTerrainToolMaterialProperties(paintContext, brushTransform, 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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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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{
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if(Event.current.control)
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{
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Terrain currentTerrain = commonUI.terrainUnderCursor;
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m_TargetHeight = currentTerrain.terrainData.GetInterpolatedHeight(editContext.uv.x, editContext.uv.y) + currentTerrain.GetPosition().y;
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editContext.Repaint();
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SaveSetting();
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return true;
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}
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else
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{
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Texture brushTexture = editContext.brushTexture;
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using(IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "SetHeightTool", brushTexture))
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{
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if(brushRender.CalculateBrushTransform(out BrushTransform brushTransform))
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{
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Rect brushBounds = brushTransform.GetBrushXYBounds();
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PaintContext paintContext = brushRender.AcquireHeightmap(true, brushBounds);
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ApplyBrushInternal(paintContext, brushRender, commonUI.brushStrength, brushTexture, brushTransform, terrain);
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}
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}
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}
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}
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return true;
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}
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void Flatten(Terrain terrain)
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{
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Undo.RegisterCompleteObjectUndo(terrain.terrainData, "Set Height - Flatten Tile");
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var ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, new Rect(0, 0, terrain.terrainData.size.x, terrain.terrainData.size.z), 1);
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Material mat = GetPaintMaterial();
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float terrainHeight = Mathf.Clamp01((m_TargetHeight - terrain.transform.position.y) / terrain.terrainData.size.y);
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Vector4 brushParams = new Vector4(0, 0.5f * terrainHeight, 0.0f, 0.0f);
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mat.SetVector("_BrushParams", brushParams);
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var size = terrain.terrainData.size;
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size.y = 0;
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var brushMask = RTUtils.GetTempHandle(ctx.sourceRenderTexture.width, ctx.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
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commonUI.GetBrushMask(terrain, ctx.sourceRenderTexture, brushMask, terrain.transform.position, Mathf.Min(size.x, size.z), 0f); // TODO(wyatt): need to handle seams
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mat.SetTexture("_FilterTex", brushMask);
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mat.SetTexture("_MainTex", ctx.sourceRenderTexture);
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Graphics.Blit(ctx.sourceRenderTexture, ctx.destinationRenderTexture, mat, 1);
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TerrainPaintUtility.EndPaintHeightmap(ctx, "Set Height - Flatten Tile");
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RTUtils.Release(brushMask);
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PaintContext.ApplyDelayedActions();
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}
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void FlattenAll(Terrain terrain)
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{
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Terrain[] terrains = TerrainFillUtility.GetTerrainsInGroup(terrain);
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for(int i = 0; i < terrains.Length; ++i)
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{
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Flatten(terrains[i]);
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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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EditorGUI.BeginChangeCheck();
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commonUI.OnInspectorGUI(terrain, editContext);
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s_showToolControls = TerrainToolGUIHelper.DrawHeaderFoldoutForBrush(Styles.controlHeader, s_showToolControls, ()=> { m_TargetHeight = 0; });
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if (s_showToolControls)
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{
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EditorGUILayout.BeginVertical("GroupBox");
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{
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#if UNITY_2019_3_OR_NEWER
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EditorGUI.BeginChangeCheck();
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m_HeightSpace = (HeightSpace)EditorGUILayout.EnumPopup(Styles.space, m_HeightSpace);
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if (EditorGUI.EndChangeCheck())
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{
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if (m_HeightSpace == HeightSpace.Local)
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m_TargetHeight = Mathf.Clamp(m_TargetHeight, terrain.GetPosition().y, terrain.terrainData.size.y + terrain.GetPosition().y);
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}
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if (m_HeightSpace == HeightSpace.Local)
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{
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m_TargetHeight = EditorGUILayout.Slider(Styles.height, m_TargetHeight - terrain.GetPosition().y, 0, terrain.terrainData.size.y) + terrain.GetPosition().y;
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}
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else
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{
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m_TargetHeight = EditorGUILayout.FloatField(Styles.height, m_TargetHeight);
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}
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#else
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m_TargetHeight = EditorGUILayout.Slider(Styles.height, m_TargetHeight, 0, terrain.terrainData.size.y);
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#endif
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GUILayout.BeginHorizontal();
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GUILayout.FlexibleSpace();
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if (GUILayout.Button(Styles.flatten, GUILayout.ExpandWidth(false)))
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{
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Flatten(terrain);
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}
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if (GUILayout.Button(Styles.flattenAll, GUILayout.ExpandWidth(false)))
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{
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FlattenAll(terrain);
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}
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GUILayout.EndHorizontal();
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if (EditorGUI.EndChangeCheck())
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{
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Save(true);
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SaveSetting();
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TerrainToolsAnalytics.OnParameterChange();
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}
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}
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EditorGUILayout.EndVertical();
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}
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}
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private void SaveSetting()
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{
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EditorPrefs.SetFloat("Unity.TerrainTools.SetHeight.Height", m_TargetHeight);
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}
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private void LoadSettings()
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{
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m_TargetHeight = EditorPrefs.GetFloat("Unity.TerrainTools.SetHeight.Height", 0.0f);
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}
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#region Analytics
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private TerrainToolsAnalytics.IBrushParameter[] UpdateAnalyticParameters() => new TerrainToolsAnalytics.IBrushParameter[]{
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Styles.height.text, Value = m_TargetHeight},
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#if UNITY_2019_3_OR_NEWER
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new TerrainToolsAnalytics.BrushParameter<string>{Name = Styles.space.text, Value = m_HeightSpace.ToString()},
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#endif
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};
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#endregion
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}
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}
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