ZMWSLI0-SL2021-GR11/Projekt/MWSProjekt/Library/PackageCache/com.unity.terrain-tools@3.0.2-preview.3/Editor/TerrainTools/CloneBrushTool.cs

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2021-07-05 21:20:56 +02:00
using UnityEngine;
using UnityEngine.Experimental.TerrainAPI;
using UnityEditor.ShortcutManagement;
namespace UnityEditor.Experimental.TerrainAPI
{
public class CloneBrushTool : TerrainPaintTool<CloneBrushTool>
{
#if UNITY_2019_1_OR_NEWER
[Shortcut("Terrain/Select Clone Tool", typeof(TerrainToolShortcutContext))] // tells shortcut manager what to call the shortcut and what to pass as args
static void SelectShortcut(ShortcutArguments args)
{
TerrainToolShortcutContext context = (TerrainToolShortcutContext)args.context; // gets interface to modify state of TerrainTools
context.SelectPaintTool<CloneBrushTool>(); // set active tool
TerrainToolsAnalytics.OnShortcutKeyRelease("Select Clone Tool");
}
#endif
private bool m_ShowControls = true;
private enum ShaderPasses
{
CloneAlphamap = 0,
CloneHeightmap
}
public enum MovementBehavior
{
FollowAlways = 0, // clone location will move with the brush always
Snap, // clone snaps back to set sample location on mouse up
FollowOnPaint, // clone location will move with the brush only when painting
Fixed, // clone wont move at all and will sample same location always
}
[System.Serializable]
struct BrushLocationData
{
public Terrain terrain;
public Vector3 pos;
public void Set(Terrain terrain, Vector3 pos)
{
this.terrain = terrain;
this.pos = pos;
}
}
[System.Serializable]
class CloneToolSerializedProperties
{
public MovementBehavior m_MovementBehavior;
public bool m_PaintHeightmap;
public bool m_PaintAlphamap;
public float m_StampingOffsetFromClone;
public void SetDefaults()
{
m_MovementBehavior = MovementBehavior.FollowAlways;
m_PaintHeightmap = true;
m_PaintAlphamap = true;
m_StampingOffsetFromClone = 0.0f;
}
}
CloneToolSerializedProperties cloneToolProperties = new CloneToolSerializedProperties();
[SerializeField]
IBrushUIGroup m_commonUI;
private IBrushUIGroup commonUI
{
get
{
if( m_commonUI == null )
{
LoadSettings();
m_commonUI = new DefaultBrushUIGroup("CloneBrushTool", UpdateAnalyticParameters);
m_commonUI.OnEnterToolMode();
}
return m_commonUI;
}
}
// variables for keeping track of mouse and key presses and painting states
private bool m_lmb;
private bool m_ctrl;
private bool m_wasPainting;
private bool m_isPainting;
private bool m_HasDoneFirstPaint;
// The current brush location data we are sampling/cloning from
private BrushLocationData m_SampleLocation;
// Brush location defined when user ctrl-clicks. Where the sample location should
// "snap" back to when the user is not painting and clone behavior == Snap
[SerializeField] private BrushLocationData m_SnapbackLocation;
// brush location data used for determining how much the user brush moved in a frame
private BrushLocationData m_PrevBrushLocation;
private static Material m_Material = null;
private static Material GetPaintMaterial()
{
if (m_Material == null)
{
m_Material = new Material(Shader.Find("Hidden/TerrainTools/CloneBrush"));
}
return m_Material;
}
public override string GetName()
{
return "Sculpt/Clone";
}
public override string GetDesc()
{
return Styles.descriptionString;
}
public override void OnEnterToolMode()
{
base.OnEnterToolMode();
commonUI.OnEnterToolMode();
}
public override void OnExitToolMode()
{
base.OnExitToolMode();
commonUI.OnExitToolMode();
}
public override void OnInspectorGUI(Terrain terrain, IOnInspectorGUI editContext)
{
EditorGUI.BeginChangeCheck();
commonUI.OnInspectorGUI(terrain, editContext);
m_ShowControls = TerrainToolGUIHelper.DrawHeaderFoldoutForBrush(Styles.controlHeader, m_ShowControls, cloneToolProperties.SetDefaults);
if(m_ShowControls)
{
EditorGUILayout.BeginVertical("GroupBox");
{
// draw button-like toggles for choosing which terrain textures to sample
EditorGUILayout.BeginHorizontal();
{
EditorGUILayout.PrefixLabel(Styles.cloneSourceContent);
cloneToolProperties.m_PaintAlphamap = GUILayout.Toggle(cloneToolProperties.m_PaintAlphamap, Styles.cloneTextureContent, GUI.skin.button);
cloneToolProperties.m_PaintHeightmap = GUILayout.Toggle(cloneToolProperties.m_PaintHeightmap, Styles.cloneHeightmapContent, GUI.skin.button);
}
EditorGUILayout.EndHorizontal();
cloneToolProperties.m_MovementBehavior = (MovementBehavior)EditorGUILayout.EnumPopup(Styles.cloneBehaviorContent, cloneToolProperties.m_MovementBehavior);
cloneToolProperties.m_StampingOffsetFromClone = EditorGUILayout.Slider(Styles.heightOffsetContent, cloneToolProperties.m_StampingOffsetFromClone,
-terrain.terrainData.size.y, terrain.terrainData.size.y);
}
EditorGUILayout.EndVertical();
}
if (EditorGUI.EndChangeCheck())
{
// intentionally do not reset HasDoneFirstPaint here because then changing the brush mask will corrupt the clone position
m_isPainting = false;
Save(true);
SaveSetting();
TerrainToolsAnalytics.OnParameterChange();
}
}
public override void OnSceneGUI(Terrain terrain, IOnSceneGUI editContext)
{
commonUI.OnSceneGUI2D(terrain, editContext);
// only do the rest if user mouse hits valid terrain or they are using the
// brush parameter hotkeys to resize, etc
if (!editContext.hitValidTerrain && !commonUI.isInUse)
{
return;
}
// update brush UI group
commonUI.OnSceneGUI(terrain, editContext);
ProcessInput(terrain, editContext);
if(!commonUI.isInUse)
{
UpdateBrushLocations(terrain, editContext);
}
// dont render preview if this isnt a repaint. losing performance if we do
if (Event.current.type != EventType.Repaint)
{
return;
}
DrawBrushPreviews(terrain, editContext);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
commonUI.OnPaint(terrain, editContext);
if (!m_isPainting || m_SampleLocation.terrain == null)
return true;
if (commonUI.allowPaint) {
Vector2 uv = editContext.uv;
if(commonUI.ScatterBrushStamp(ref terrain, ref uv)) {
// grab brush transforms for the sample location (where we are cloning from)
// and target location (where we are cloning to)
Vector2 sampleUV = TerrainUVFromBrushLocation(m_SampleLocation.terrain, m_SampleLocation.pos);
BrushTransform sampleBrushXform = TerrainPaintUtility.CalculateBrushTransform(m_SampleLocation.terrain, sampleUV, commonUI.brushSize, commonUI.brushRotation);
BrushTransform targetBrushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, uv, commonUI.brushSize, commonUI.brushRotation);
// set material props that will be used for both heightmap and alphamap painting
Material mat = GetPaintMaterial();
Vector4 brushParams = new Vector4(commonUI.brushStrength, cloneToolProperties.m_StampingOffsetFromClone * 0.5f, terrain.terrainData.size.y, 0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
// apply texture modifications to terrain
if (cloneToolProperties.m_PaintAlphamap) PaintAlphamap(m_SampleLocation.terrain, terrain, sampleBrushXform, targetBrushXform, mat);
if (cloneToolProperties.m_PaintHeightmap) PaintHeightmap(m_SampleLocation.terrain, terrain, sampleBrushXform, targetBrushXform, editContext, mat);
}
}
return false;
}
private void ProcessInput(Terrain terrain, IOnSceneGUI editContext)
{
// update Left Mouse Button state
if (Event.current.type == EventType.MouseDown && Event.current.button == 0 && commonUI.isRaycastHitUnderCursorValid)
m_lmb = true;
else if (Event.current.type == EventType.MouseUp && Event.current.button == 0)
m_lmb = false;
if(!m_isPainting)
{
m_ctrl = Event.current.control;
}
m_wasPainting = m_isPainting;
// xxx(jcowles): this logic is no good becuse it makes assumptions about what modifier keys will enable/disable painting,
// however this cannot be known without querying other systems (e.g. orbiting the camera uses some combination of mouse
// buttons and modifier keys, but the exact configuration is a user setting). For now, assume when ALT is pressed, we are
// not painting.
m_isPainting = m_lmb && !m_ctrl && !Event.current.alt;
}
private void UpdateBrushLocations(Terrain terrain, IOnSceneGUI editContext)
{
if (!commonUI.isRaycastHitUnderCursorValid)
{
return;
}
if (!m_isPainting)
{
// check to see if the user is selecting a new location for the clone sample
// and set the current sample location to that as well as the snap back location
if(m_lmb && m_ctrl)
{
m_HasDoneFirstPaint = false;
m_SampleLocation.Set(terrain, editContext.raycastHit.point);
m_SnapbackLocation.Set(terrain, editContext.raycastHit.point);
}
// snap the sample location back to the user-picked sample position
if (cloneToolProperties.m_MovementBehavior == MovementBehavior.Snap)
{
m_SampleLocation.Set(m_SnapbackLocation.terrain, m_SnapbackLocation.pos);
}
}
else if (!m_wasPainting && m_isPainting) // first frame of user painting
{
m_HasDoneFirstPaint = true;
// check if the user just started painting. do this so a delta pos
// isn't applied to the sample location on the first paint operation
m_PrevBrushLocation.Set(terrain, editContext.raycastHit.point);
}
bool updateClone = (m_isPainting && cloneToolProperties.m_MovementBehavior != MovementBehavior.Fixed) ||
(m_isPainting && cloneToolProperties.m_MovementBehavior == MovementBehavior.FollowOnPaint) ||
(m_HasDoneFirstPaint && cloneToolProperties.m_MovementBehavior == MovementBehavior.FollowAlways);
if (updateClone)
{
HandleBrushCrossingSeams(ref m_SampleLocation, editContext.raycastHit.point, m_PrevBrushLocation.pos);
}
// update the previous paint location for use in the next frame (if the user is painting)
m_PrevBrushLocation.Set(terrain, editContext.raycastHit.point);
}
// check to see if the sample brush is crossing any terrain seams/borders. have to do this manually
// since TerrainPaintUtility only immediate neighbors and not manually created PaintContexts
private void HandleBrushCrossingSeams(ref BrushLocationData brushLocation, Vector3 currBrushPos, Vector3 prevBrushPos)
{
if (brushLocation.terrain == null)
return;
Vector3 deltaPos = currBrushPos - prevBrushPos;
brushLocation.Set(brushLocation.terrain, brushLocation.pos + deltaPos);
Vector2 currUV = TerrainUVFromBrushLocation(brushLocation.terrain, brushLocation.pos);
if (currUV.x >= 1.0f && brushLocation.terrain.rightNeighbor != null)
brushLocation.terrain = brushLocation.terrain.rightNeighbor;
else if (currUV.x < 0.0f && brushLocation.terrain.leftNeighbor != null)
brushLocation.terrain = brushLocation.terrain.leftNeighbor;
if (currUV.y >= 1.0f && brushLocation.terrain.topNeighbor != null)
brushLocation.terrain = brushLocation.terrain.topNeighbor;
else if (currUV.y < 0.0f && brushLocation.terrain.bottomNeighbor != null)
brushLocation.terrain = brushLocation.terrain.bottomNeighbor;
}
private void DrawBrushPreviews(Terrain terrain, IOnSceneGUI editContext)
{
Vector2 sampleUV;
BrushTransform sampleXform;
PaintContext sampleContext = null;
Material previewMat = TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial();
// draw sample location brush and create context data to be used when drawing target brush previews
if (m_SampleLocation.terrain != null)
{
sampleUV = TerrainUVFromBrushLocation(m_SampleLocation.terrain, m_SampleLocation.pos);
sampleXform = TerrainPaintUtility.CalculateBrushTransform(m_SampleLocation.terrain, sampleUV, commonUI.brushSize, commonUI.brushRotation);
sampleContext = TerrainPaintUtility.BeginPaintHeightmap(m_SampleLocation.terrain, sampleXform.GetBrushXYBounds());
TerrainPaintUtilityEditor.DrawBrushPreview(sampleContext, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture,
editContext.brushTexture, sampleXform, previewMat, 0);
}
// draw brush preview and mesh preview for current mouse position
if (commonUI.isRaycastHitUnderCursorValid)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, commonUI.raycastHitUnderCursor.textureCoord, commonUI.brushSize, commonUI.brushRotation);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, editContext.brushTexture, brushXform, TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial(), 0);
if (sampleContext != null && cloneToolProperties.m_PaintHeightmap) {
ApplyHeightmap(sampleContext, ctx, brushXform, terrain, editContext.brushTexture, commonUI.brushStrength);
RenderTexture.active = ctx.oldRenderTexture;
previewMat.SetTexture("_HeightmapOrig", ctx.sourceRenderTexture);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.DestinationRenderTexture,
editContext.brushTexture, brushXform, previewMat, 1);
}
// Restores RenderTexture.active
ctx.Cleanup();
}
// Restores RenderTexture.active
sampleContext?.Cleanup();
}
private Vector2 TerrainUVFromBrushLocation(Terrain terrain, Vector3 posWS)
{
// position relative to Terrain-space. doesnt handle rotations,
// since that's not really supported at the moment
Vector3 posTS = posWS - terrain.transform.position;
Vector3 size = terrain.terrainData.size;
return new Vector2(posTS.x / size.x, posTS.z / size.z);
}
private void ApplyHeightmap(PaintContext sampleContext, PaintContext targetContext, BrushTransform targetXform,
Terrain targetTerrain, Texture brushTexture, float brushStrength)
{
Material paintMat = GetPaintMaterial();
Vector4 brushParams = new Vector4(brushStrength, cloneToolProperties.m_StampingOffsetFromClone * 0.5f, targetTerrain.terrainData.size.y, 0f);
paintMat.SetTexture("_BrushTex", brushTexture);
paintMat.SetVector("_BrushParams", brushParams);
paintMat.SetTexture("_CloneTex", sampleContext.sourceRenderTexture);
paintMat.SetVector("_SampleUVScaleOffset", ComputeSampleUVScaleOffset(sampleContext, targetContext));
var brushMask = RTUtils.GetTempHandle(sampleContext.sourceRenderTexture.width, sampleContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
Utility.SetFilterRT(commonUI, sampleContext.sourceRenderTexture, brushMask, paintMat);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(targetContext, targetXform, paintMat);
Graphics.Blit(targetContext.sourceRenderTexture, targetContext.destinationRenderTexture, paintMat, (int)ShaderPasses.CloneHeightmap);
RTUtils.Release(brushMask);
}
private Vector4 ComputeSampleUVScaleOffset(PaintContext sampleContext, PaintContext targetContext) {
Vector4 sampleUVScaleOffset;
TerrainPaintUtility.BuildTransformPaintContextUVToPaintContextUV(targetContext, sampleContext, out sampleUVScaleOffset);
var sampleUV = TerrainUVFromBrushLocation(m_SampleLocation.terrain, m_SampleLocation.pos);
var paintContextUVOffset = sampleUV * (sampleContext.targetTextureHeight / (float)m_SampleLocation.terrain.terrainData.heightmapResolution);
float deltaUPixels = (sampleUV.x - commonUI.raycastHitUnderCursor.textureCoord.x) * targetContext.targetTextureWidth;
float deltaVPixels = (sampleUV.y - commonUI.raycastHitUnderCursor.textureCoord.y) * targetContext.targetTextureHeight;
sampleUVScaleOffset.z += ((int) deltaUPixels) / (float)sampleContext.pixelRect.width;
sampleUVScaleOffset.w += ((int) deltaVPixels) / (float)sampleContext.pixelRect.height;
return sampleUVScaleOffset;
}
private void PaintHeightmap(Terrain sampleTerrain, Terrain targetTerrain, BrushTransform sampleXform,
BrushTransform targetXform, IOnPaint editContext, Material mat)
{
PaintContext sampleContext = TerrainPaintUtility.BeginPaintHeightmap(sampleTerrain, sampleXform.GetBrushXYBounds());
PaintContext targetContext = TerrainPaintUtility.BeginPaintHeightmap(targetTerrain, targetXform.GetBrushXYBounds());
ApplyHeightmap(sampleContext, targetContext, targetXform, targetTerrain, editContext.brushTexture, commonUI.brushStrength);
TerrainPaintUtility.EndPaintHeightmap(targetContext, "Terrain Paint - Clone Brush (Heightmap)");
// Restores RenderTexture.active
sampleContext.Cleanup();
targetContext.Cleanup();
}
private void PaintAlphamap(Terrain sampleTerrain, Terrain targetTerrain, BrushTransform sampleXform, BrushTransform targetXform, Material mat)
{
Rect sampleRect = sampleXform.GetBrushXYBounds();
Rect targetRect = targetXform.GetBrushXYBounds();
int numSampleTerrainLayers = sampleTerrain.terrainData.terrainLayers.Length;
for (int i = 0; i < numSampleTerrainLayers; ++i)
{
TerrainLayer layer = sampleTerrain.terrainData.terrainLayers[i];
if (layer == null) continue; // nothing to paint if the layer is NULL
PaintContext sampleContext = TerrainPaintUtility.BeginPaintTexture(sampleTerrain, sampleRect, layer);
int layerIndex = TerrainPaintUtility.FindTerrainLayerIndex(sampleTerrain, layer);
Texture2D layerTexture = TerrainPaintUtility.GetTerrainAlphaMapChecked(sampleTerrain, layerIndex >> 2);
PaintContext targetContext = PaintContext.CreateFromBounds(targetTerrain, targetRect, layerTexture.width, layerTexture.height);
targetContext.CreateRenderTargets(RenderTextureFormat.R8);
targetContext.GatherAlphamap(layer, true);
sampleContext.sourceRenderTexture.filterMode = FilterMode.Point;
mat.SetTexture("_CloneTex", sampleContext.sourceRenderTexture);
mat.SetVector("_SampleUVScaleOffset", ComputeSampleUVScaleOffset(sampleContext, targetContext));
var brushMask = RTUtils.GetTempHandle(targetContext.sourceRenderTexture.width, targetContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
Utility.SetFilterRT(commonUI, targetContext.sourceRenderTexture, brushMask, mat);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(targetContext, targetXform, mat);
Graphics.Blit(targetContext.sourceRenderTexture, targetContext.destinationRenderTexture, mat, (int)ShaderPasses.CloneAlphamap);
// apply texture modifications and perform cleanup. same thing as calling TerrainPaintUtility.EndPaintTexture
targetContext.ScatterAlphamap("Terrain Paint - Clone Brush (Texture)");
// Restores RenderTexture.active
targetContext.Cleanup();
RTUtils.Release(brushMask);
}
}
private static class Styles
{
public static readonly string descriptionString =
"Clones terrain from another area of the terrain map to the selected location.\n\n" +
"Hold Ctrl and Left Click to assign the clone sample area.\n\n" +
"Left Click to apply the cloned stamp.";
public static readonly GUIContent cloneSourceContent = EditorGUIUtility.TrTextContent("Terrain sources to clone:",
"Textures:\nBrush will gather and clone TerrainLayer data at Sample location\n\n" +
"Heightmap:\nBrush will gather and clone Heightmap data at Sample location");
public static readonly GUIContent cloneTextureContent = EditorGUIUtility.TrTextContent("Textures", "Brush will gather and clone TerrainLayer data from Sample location");
public static readonly GUIContent cloneHeightmapContent = EditorGUIUtility.TrTextContent("Heightmap", "Brush will gather and clone Heightmap data from Sample location");
public static readonly GUIContent cloneBehaviorContent = EditorGUIUtility.TrTextContent("Clone Movement Behavior",
"Snap:\nClone location will snap back to user-selected location on mouse-up\n\n" +
"Follow On Paint:\nClone location will move with mouse position (only when painting) and not snap back\n\n" +
"Follow Always:\nClone location will always move with mouse position (even when not painting) and not snap back\n\n" +
"Fixed:\nClone location will always stay at the user-selected location");
public static readonly GUIContent heightOffsetContent = EditorGUIUtility.TrTextContent("Height Offset",
"When stamping the heightmap, the cloned height will be added with this offset to raise or lower the cloned height at the stamp location.");
public static readonly GUIContent controlHeader = EditorGUIUtility.TrTextContent("Clone Brush Controls");
public static GUIStyle buttonActiveStyle = null;
public static GUIStyle buttonNormalStyle = null;
static Styles()
{
buttonNormalStyle = "Button";
buttonActiveStyle = new GUIStyle("Button");
buttonActiveStyle.normal.background = buttonNormalStyle.active.background;
}
public static GUIStyle GetButtonToggleStyle(bool isToggled)
{
return isToggled ? buttonActiveStyle : buttonNormalStyle;
}
}
private void SaveSetting()
{
string cloneToolData = JsonUtility.ToJson(cloneToolProperties);
EditorPrefs.SetString("Unity.TerrainTools.Clone", cloneToolData);
}
private void LoadSettings()
{
string cloneToolData = EditorPrefs.GetString("Unity.TerrainTools.Clone");
cloneToolProperties.SetDefaults();
JsonUtility.FromJsonOverwrite(cloneToolData, cloneToolProperties);
}
#region Analytics
private TerrainToolsAnalytics.IBrushParameter[] UpdateAnalyticParameters() => new TerrainToolsAnalytics.IBrushParameter[]{
new TerrainToolsAnalytics.BrushParameter<bool>{Name = Styles.cloneTextureContent.text, Value = cloneToolProperties.m_PaintAlphamap},
new TerrainToolsAnalytics.BrushParameter<bool>{Name = Styles.cloneHeightmapContent.text, Value = cloneToolProperties.m_PaintHeightmap},
new TerrainToolsAnalytics.BrushParameter<string>{Name = Styles.cloneBehaviorContent.text, Value = cloneToolProperties.m_MovementBehavior.ToString()},
new TerrainToolsAnalytics.BrushParameter<float>{Name = Styles.heightOffsetContent.text, Value = cloneToolProperties.m_StampingOffsetFromClone},
};
#endregion
}
}