248 lines
10 KiB
C#
248 lines
10 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 SmoothHeightTool : TerrainPaintTool<SmoothHeightTool>
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{
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#if UNITY_2019_1_OR_NEWER
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[Shortcut("Terrain/Select Smooth Tool", typeof(TerrainToolShortcutContext), KeyCode.F3)]
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static void SelectShortcut(ShortcutArguments args) {
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TerrainToolShortcutContext context = (TerrainToolShortcutContext)args.context;
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context.SelectPaintTool<SmoothHeightTool>();
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TerrainToolsAnalytics.OnShortcutKeyRelease("Select Smooth 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("SmoothTool", 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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const string toolName = "Smooth Height";
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[SerializeField]
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public float m_direction = 0.0f; // -1 to 1
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[SerializeField]
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public int m_KernelSize = 1; //blur kernel size
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Material m_Material = null;
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Material GetMaterial() {
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if (m_Material == null)
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m_Material = new Material(Shader.Find("Hidden/TerrainTools/SmoothHeight"));
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return m_Material;
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}
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ComputeShader m_DiffusionCS = null;
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ComputeShader GetDiffusionShader() {
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if(m_DiffusionCS == null) {
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m_DiffusionCS = (ComputeShader)Resources.Load("Diffusion");
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}
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return m_DiffusionCS;
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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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bool m_ShowControls = true;
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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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m_ShowControls = TerrainToolGUIHelper.DrawHeaderFoldoutForBrush(Styles.controls, m_ShowControls, Reset);
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if (m_ShowControls)
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{
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EditorGUILayout.BeginVertical("GroupBox");
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m_direction = EditorGUILayout.Slider(Styles.direction, m_direction, -1.0f, 1.0f);
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m_KernelSize = EditorGUILayout.IntSlider(Styles.kernelSize, m_KernelSize, 1, terrain.terrainData.heightmapResolution / 2 - 1);
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EditorGUILayout.EndVertical();
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}
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if (EditorGUI.EndChangeCheck())
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{
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SaveSetting();
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Save(true);
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TerrainToolsAnalytics.OnParameterChange();
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}
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}
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private void Reset()
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{
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m_direction = 0.0f; // -1 to 1
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m_KernelSize = 1; //blur kernel size
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}
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private void ApplyBrushInternal(Terrain terrain, PaintContext paintContext, float brushStrength, Texture brushTexture, BrushTransform brushXform)
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{
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/*
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ComputeShader cs = GetDiffusionShader();
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int kernel = cs.FindKernel("Diffuse");
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cs.SetFloat("dt", 0.1f);
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cs.SetFloat("diff", 0.01f);
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cs.SetVector("texDim", new Vector4(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0.0f, 0.0f));
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cs.SetTexture(kernel, "InputTex", paintContext.sourceRenderTexture);
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cs.SetTexture(kernel, "OutputTex", paintContext.destinationRenderTexture);
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cs.Dispatch(kernel, paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 1);
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*/
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RenderTexture prev = RenderTexture.active;
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Material mat = GetMaterial();
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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(Mathf.Clamp(brushStrength, 0.0f, 1.0f), 0.0f, 0.0f, 0.0f);
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mat.SetTexture("_BrushTex", brushTexture);
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mat.SetVector("_BrushParams", brushParams);
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Vector4 smoothWeights = new Vector4(
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Mathf.Clamp01(1.0f - Mathf.Abs(m_direction)), // centered
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Mathf.Clamp01(-m_direction), // min
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Mathf.Clamp01(m_direction), // max
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0);
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mat.SetInt("_KernelSize", (int)Mathf.Max(1, m_KernelSize)); // kernel size
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mat.SetVector("_SmoothWeights", smoothWeights);
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var texelCtx = Utility.CollectTexelValidity(terrain, brushXform.GetBrushXYBounds());
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Utility.SetupMaterialForPaintingWithTexelValidityContext(paintContext, texelCtx, brushXform, mat);
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paintContext.sourceRenderTexture.wrapMode = TextureWrapMode.Clamp;
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paintContext.destinationRenderTexture.wrapMode = TextureWrapMode.Clamp;
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// Two pass blur (first horizontal, then vertical)
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var tmpRT = RTUtils.GetTempHandle(paintContext.destinationRenderTexture.descriptor);
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tmpRT.RT.wrapMode = TextureWrapMode.Clamp;
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mat.SetVector("_BlurDirection", Vector2.right);
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Graphics.Blit(paintContext.sourceRenderTexture, tmpRT, mat);
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mat.SetVector("_BlurDirection", Vector2.up);
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Graphics.Blit(tmpRT, paintContext.destinationRenderTexture, mat);
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RTUtils.Release(tmpRT);
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RTUtils.Release(brushMask);
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texelCtx.Cleanup();
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RenderTexture.active = prev;
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RenderTexture.ReleaseTemporary(brushMask);
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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, "SmoothHeight", 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 material = TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial();
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PaintContext ctx = brushRender.AcquireHeightmap(false, brushXform.GetBrushXYBounds(), 1);
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material.SetVector("_JitterOffset", Vector3.zero);
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brushRender.RenderBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, brushXform, material, 0);
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// draw result preview
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{
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ApplyBrushInternal(terrain, ctx, commonUI.brushStrength, editContext.brushTexture, brushXform);
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// restore old render target
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RenderTexture.active = ctx.oldRenderTexture;
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material.SetTexture("_HeightmapOrig", ctx.sourceRenderTexture);
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brushRender.RenderBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.DestinationRenderTexture, brushXform, material, 1);
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}
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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 true; }
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using(IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "SmoothHeight", 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());
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ApplyBrushInternal(terrain, paintContext, commonUI.brushStrength, editContext.brushTexture, brushXform);
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}
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}
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return true;
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}
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private static class Styles
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{
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public static readonly GUIContent controls = EditorGUIUtility.TrTextContent("Smooth Controls");
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public static readonly GUIContent description = EditorGUIUtility.TrTextContent("Click to smooth the terrain height.");
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public static readonly GUIContent direction = EditorGUIUtility.TrTextContent("Verticality", "Blur only up (1.0), only down (-1.0) or both (0.0)");
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public static readonly GUIContent kernelSize = EditorGUIUtility.TrTextContent("Blur Radius", "Specifies the size of the blurring operation in texture space. This is used to determine the number of texels to include in the blur sample average");
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}
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private void SaveSetting()
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{
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EditorPrefs.SetFloat("Unity.TerrainTools.SmoothHeight.Verticality", m_direction);
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}
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private void LoadSettings()
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{
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m_direction = EditorPrefs.GetFloat("Unity.TerrainTools.SmoothHeight.Verticality", 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.direction.text, Value = m_direction},
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new TerrainToolsAnalytics.BrushParameter<float>{Name = Styles.kernelSize.text, Value = m_KernelSize},
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};
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#endregion
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}
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}
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