220 lines
11 KiB
C#
220 lines
11 KiB
C#
|
using UnityEngine;
|
||
|
|
using UnityEngine.TerrainTools;
|
||
|
|
using UnityEditor.ShortcutManagement;
|
||
|
|
|
||
|
|
namespace UnityEditor.TerrainTools
|
||
|
|
{
|
||
|
|
internal class WindErosionTool : TerrainPaintTool<WindErosionTool>
|
||
|
|
{
|
||
|
|
#if UNITY_2019_1_OR_NEWER
|
||
|
|
[Shortcut("Terrain/Select Wind Erosion 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<WindErosionTool>(); // set active tool
|
||
|
|
TerrainToolsAnalytics.OnShortcutKeyRelease("Select Wind Erosion Tool");
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
[SerializeField]
|
||
|
|
IBrushUIGroup m_commonUI;
|
||
|
|
private IBrushUIGroup commonUI
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
if( m_commonUI == null )
|
||
|
|
{
|
||
|
|
m_commonUI = new Erosion.ErosionBrushUIGroup( "WindErosion",
|
||
|
|
UpdateAnalyticParameters,
|
||
|
|
DefaultBrushUIGroup.Feature.All,
|
||
|
|
new DefaultBrushUIGroup.FeatureDefaults { Strength = 0.64f }
|
||
|
|
);
|
||
|
|
m_commonUI.OnEnterToolMode();
|
||
|
|
}
|
||
|
|
|
||
|
|
return m_commonUI;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Erosion.WindEroder m_Eroder = null;
|
||
|
|
|
||
|
|
public override void OnEnterToolMode() {
|
||
|
|
base.OnEnterToolMode();
|
||
|
|
commonUI.OnEnterToolMode();
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void OnExitToolMode() {
|
||
|
|
base.OnExitToolMode();
|
||
|
|
commonUI.OnExitToolMode();
|
||
|
|
}
|
||
|
|
|
||
|
|
Material m_Material = null;
|
||
|
|
Material GetPaintMaterial()
|
||
|
|
{
|
||
|
|
if (m_Material == null)
|
||
|
|
m_Material = new Material(Shader.Find("Hidden/TerrainTools/SimpleHeightBlend"));
|
||
|
|
return m_Material;
|
||
|
|
}
|
||
|
|
|
||
|
|
public override string GetName()
|
||
|
|
{
|
||
|
|
return "Erosion/Wind";
|
||
|
|
}
|
||
|
|
|
||
|
|
public override string GetDescription()
|
||
|
|
{
|
||
|
|
return "Simulates the effect of wind transporting and redistributing sediment.\n\n" +
|
||
|
|
"Hold D + Drag to change the wind direction";
|
||
|
|
}
|
||
|
|
|
||
|
|
private void RepaintInspector() {
|
||
|
|
Editor[] ed = (Editor[])Resources.FindObjectsOfTypeAll<Editor>();
|
||
|
|
for (int i = 0; i < ed.Length; ++i) {
|
||
|
|
if (ed[i].GetType() == this.GetType()) {
|
||
|
|
ed[i].Repaint();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void OnEnable() {
|
||
|
|
base.OnEnable();
|
||
|
|
m_Eroder = new Erosion.WindEroder();
|
||
|
|
m_Eroder.OnEnable();
|
||
|
|
}
|
||
|
|
|
||
|
|
Vector3 m_SceneRaycastHitPoint;
|
||
|
|
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);
|
||
|
|
|
||
|
|
// dont render preview if this isnt a repaint. losing performance if we do
|
||
|
|
if (Event.current.type != EventType.Repaint)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
using(IBrushRenderPreviewUnderCursor brushRender = new BrushRenderPreviewUIGroupUnderCursor(commonUI, "WindErosion", editContext.brushTexture))
|
||
|
|
{
|
||
|
|
if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
|
||
|
|
{
|
||
|
|
Material previewMaterial = Utility.GetDefaultPreviewMaterial(commonUI.hasEnabledFilters);
|
||
|
|
PaintContext ctx = brushRender.AcquireHeightmap(false, brushXform.GetBrushXYBounds(), 1);
|
||
|
|
var texelCtx = Utility.CollectTexelValidity(ctx.originTerrain, brushXform.GetBrushXYBounds());
|
||
|
|
Utility.SetupMaterialForPaintingWithTexelValidityContext(ctx, texelCtx, brushXform, previewMaterial);
|
||
|
|
var filterRT = RTUtils.GetTempHandle(ctx.sourceRenderTexture.width, ctx.sourceRenderTexture.height,
|
||
|
|
0, FilterUtility.defaultFormat);
|
||
|
|
Utility.GenerateAndSetFilterRT(commonUI, ctx.sourceRenderTexture, filterRT, previewMaterial);
|
||
|
|
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainBrushPreviewMode.SourceRenderTexture,
|
||
|
|
editContext.brushTexture, brushXform, previewMaterial, 0);
|
||
|
|
texelCtx.Cleanup();
|
||
|
|
RTUtils.Release(filterRT);
|
||
|
|
|
||
|
|
Quaternion windRot = Quaternion.AngleAxis(commonUI.brushRotation, new Vector3(0.0f, 1.0f, 0.0f));
|
||
|
|
Handles.ArrowHandleCap(0, commonUI.raycastHitUnderCursor.point, windRot, 0.5f * commonUI.brushSize, EventType.Repaint);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void OnInspectorGUI(Terrain terrain, IOnInspectorGUI editContext)
|
||
|
|
{
|
||
|
|
EditorGUI.BeginChangeCheck();
|
||
|
|
|
||
|
|
commonUI.OnInspectorGUI(terrain, editContext);
|
||
|
|
m_Eroder.OnInspectorGUI();
|
||
|
|
|
||
|
|
commonUI.validationMessage = TerrainToolGUIHelper.ValidateAndGenerateSceneGUIMessage(terrain);
|
||
|
|
|
||
|
|
if (EditorGUI.EndChangeCheck()) {
|
||
|
|
Save(true);
|
||
|
|
TerrainToolsAnalytics.OnParameterChange();
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
|
||
|
|
{
|
||
|
|
commonUI.OnPaint(terrain, editContext);
|
||
|
|
|
||
|
|
if(!commonUI.allowPaint) { return true; }
|
||
|
|
|
||
|
|
Vector2 uv = editContext.uv;
|
||
|
|
|
||
|
|
if(commonUI.ScatterBrushStamp(ref terrain, ref uv))
|
||
|
|
{
|
||
|
|
using(IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "WindErosion", editContext.brushTexture))
|
||
|
|
{
|
||
|
|
if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
|
||
|
|
{
|
||
|
|
var brushBounds = brushXform.GetBrushXYBounds();
|
||
|
|
PaintContext paintContext = brushRender.AcquireHeightmap(true, brushBounds, 4);
|
||
|
|
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
|
||
|
|
|
||
|
|
//paintContext.sourceRenderTexture = input heightmap
|
||
|
|
//Add Velocity (user wind direction and strength, or texture input, noise, forces, drag etc...)
|
||
|
|
float angle = commonUI.brushRotation; //m_WindAngleDegrees + r;
|
||
|
|
float r = 0.5f * (2.0f * UnityEngine.Random.value - 1.0f) * 0.01f * m_Eroder.m_WindSpeedJitter;
|
||
|
|
float speed = m_Eroder.m_WindSpeed.value + r;
|
||
|
|
|
||
|
|
float rad = angle * Mathf.Deg2Rad;
|
||
|
|
m_Eroder.m_WindVel = speed * (new Vector4(-Mathf.Sin(rad), Mathf.Cos(rad), 0.0f, 0.0f));
|
||
|
|
m_Eroder.inputTextures["Height"] = paintContext.sourceRenderTexture;
|
||
|
|
|
||
|
|
var heightRT = RTUtils.GetTempHandle(RTUtils.GetDescriptorRW((int) brushBounds.width, (int) brushBounds.height, 0, RenderTextureFormat.RFloat));
|
||
|
|
Vector2 texelSize = new Vector2(terrain.terrainData.size.x / terrain.terrainData.heightmapResolution,
|
||
|
|
terrain.terrainData.size.z / terrain.terrainData.heightmapResolution);
|
||
|
|
m_Eroder.ErodeHeightmap(heightRT, terrain.terrainData.size, brushBounds, texelSize);
|
||
|
|
|
||
|
|
//Blit the result onto the new height map
|
||
|
|
Material mat = GetPaintMaterial();
|
||
|
|
var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
|
||
|
|
Utility.GenerateAndSetFilterRT(commonUI, paintContext.sourceRenderTexture, brushMask, mat);
|
||
|
|
Vector4 brushParams = new Vector4(commonUI.brushStrength, 0.0f, 0.0f, 0.0f);
|
||
|
|
mat.SetTexture("_BrushTex", editContext.brushTexture);
|
||
|
|
mat.SetTexture("_NewHeightTex", heightRT);
|
||
|
|
mat.SetVector("_BrushParams", brushParams);
|
||
|
|
|
||
|
|
brushRender.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
|
||
|
|
brushRender.RenderBrush(paintContext, mat, 0);
|
||
|
|
brushRender.Release(paintContext);
|
||
|
|
RTUtils.Release(brushMask);
|
||
|
|
RTUtils.Release(heightRT);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
//Analytics Setup
|
||
|
|
private TerrainToolsAnalytics.IBrushParameter[] UpdateAnalyticParameters() => new TerrainToolsAnalytics.IBrushParameter[] {
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_SimulationScale.text, Value = m_Eroder.SimulationScale.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_WindSpeed.text, Value = m_Eroder.m_WindSpeed.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_TimeDelta.text, Value = m_Eroder.TimeInterval.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<int> { Name = Erosion.Styles.m_NumIterations.text, Value = m_Eroder.Iterations.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_SuspensionRate.text, Value = m_Eroder.SuspensionRate.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_DepositionRate.text, Value = m_Eroder.DepositionRate.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_SlopeFactor.text, Value = m_Eroder.SlopeFactor.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_FlowRate.text, Value = m_Eroder.AdvectionVelScale.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_DragCoefficient.text, Value = m_Eroder.DragCoefficient.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_ReflectionCoefficient.text, Value = m_Eroder.ReflectionCoefficient.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_DiffusionRate.text, Value = m_Eroder.DiffusionRate.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_AbrasivenessCoefficient.text, Value = m_Eroder.AbrasivenessCoefficient.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_Viscosity.text, Value = m_Eroder.Viscosity.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = "# Iterations", Value = m_Eroder.ThermalIterations },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_ThermalDTScalar.text, Value = m_Eroder.ThermalTimeDelta.value },
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float> { Name = Erosion.Styles.m_AngleOfRepose.text, Value = m_Eroder.AngleOfRepose },
|
||
|
|
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|