224 lines
10 KiB
C#
224 lines
10 KiB
C#
|
using UnityEngine;
|
||
|
|
using UnityEngine.Experimental.TerrainAPI;
|
||
|
|
using UnityEditor.ShortcutManagement;
|
||
|
|
using Erosion;
|
||
|
|
|
||
|
|
namespace UnityEditor.Experimental.TerrainAPI
|
||
|
|
{
|
||
|
|
public class HydroErosionTool : TerrainPaintTool<HydroErosionTool>, IValidationTests
|
||
|
|
{
|
||
|
|
#if UNITY_2019_1_OR_NEWER
|
||
|
|
[Shortcut("Terrain/Select Hydraulic Erosion Brush", typeof(TerrainToolShortcutContext), KeyCode.F4)] // 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<HydroErosionTool>(); // set active tool
|
||
|
|
TerrainToolsAnalytics.OnShortcutKeyRelease("Select Hydraulic Erosion Brush");
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
[SerializeField]
|
||
|
|
IBrushUIGroup m_commonUI;
|
||
|
|
private IBrushUIGroup commonUI
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
if( m_commonUI == null )
|
||
|
|
{
|
||
|
|
m_commonUI = new DefaultBrushUIGroup("HydroErosion", UpdateAnalyticParameters);
|
||
|
|
m_commonUI.OnEnterToolMode();
|
||
|
|
}
|
||
|
|
|
||
|
|
return m_commonUI;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
NoiseSettings m_HardnessNoiseSettings = null;
|
||
|
|
|
||
|
|
#region Resources
|
||
|
|
|
||
|
|
Erosion.HydraulicEroder m_Eroder = null;// = new Erosion.HydraulicEroder();
|
||
|
|
|
||
|
|
Material m_Material = null;
|
||
|
|
Material GetPaintMaterial() {
|
||
|
|
if (m_Material == null)
|
||
|
|
m_Material = new Material(Shader.Find("Hidden/TerrainTools/SimpleHeightBlend"));
|
||
|
|
return m_Material;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
#region GUI
|
||
|
|
|
||
|
|
public override void OnEnable() {
|
||
|
|
base.OnEnable();
|
||
|
|
m_Eroder = new Erosion.HydraulicEroder();
|
||
|
|
m_Eroder.OnEnable();
|
||
|
|
}
|
||
|
|
|
||
|
|
public override string GetName()
|
||
|
|
{
|
||
|
|
return "Erosion/Hydraulic";
|
||
|
|
}
|
||
|
|
|
||
|
|
public override string GetDesc()
|
||
|
|
{
|
||
|
|
return "Hydraulic Erosion\nErodes the terrain according to a fluid simulation.";
|
||
|
|
}
|
||
|
|
|
||
|
|
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, "HydroErosion", editContext.brushTexture))
|
||
|
|
{
|
||
|
|
if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
|
||
|
|
{
|
||
|
|
PaintContext ctx = brushRender.AcquireHeightmap(false, brushXform.GetBrushXYBounds(), 1);
|
||
|
|
|
||
|
|
brushRender.RenderBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, brushXform, TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial(), 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void OnInspectorGUI(Terrain terrain, IOnInspectorGUI editContext)
|
||
|
|
{
|
||
|
|
if (m_HardnessNoiseSettings == null) {
|
||
|
|
m_HardnessNoiseSettings = ScriptableObject.CreateInstance<NoiseSettings>();
|
||
|
|
m_HardnessNoiseSettings.Reset();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
Erosion.HydraulicErosionSettings erosionSettings = ((Erosion.HydraulicEroder)m_Eroder).m_ErosionSettings;
|
||
|
|
|
||
|
|
EditorGUI.BeginChangeCheck();
|
||
|
|
|
||
|
|
commonUI.OnInspectorGUI(terrain, editContext);
|
||
|
|
|
||
|
|
m_Eroder.OnInspectorGUI(terrain, editContext);
|
||
|
|
|
||
|
|
commonUI.validationMessage = ValidateAndGenerateUserMessage(terrain);
|
||
|
|
|
||
|
|
if (EditorGUI.EndChangeCheck()) {
|
||
|
|
Save(true);
|
||
|
|
TerrainToolsAnalytics.OnParameterChange();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
#region Paint
|
||
|
|
|
||
|
|
public override void OnEnterToolMode() {
|
||
|
|
base.OnEnterToolMode();
|
||
|
|
commonUI.OnEnterToolMode();
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void OnExitToolMode() {
|
||
|
|
base.OnExitToolMode();
|
||
|
|
commonUI.OnExitToolMode();
|
||
|
|
}
|
||
|
|
|
||
|
|
public override bool OnPaint(Terrain terrain, IOnPaint editContext) {
|
||
|
|
commonUI.OnPaint(terrain, editContext);
|
||
|
|
|
||
|
|
if(!commonUI.allowPaint) { return true; }
|
||
|
|
|
||
|
|
using(IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "HydroErosion", editContext.brushTexture))
|
||
|
|
{
|
||
|
|
if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
|
||
|
|
{
|
||
|
|
PaintContext paintContext = brushRender.AcquireHeightmap(true, brushXform.GetBrushXYBounds(), 1);
|
||
|
|
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
|
||
|
|
|
||
|
|
m_Eroder.inputTextures["Height"] = paintContext.sourceRenderTexture;
|
||
|
|
|
||
|
|
Vector2 texelSize = new Vector2(terrain.terrainData.size.x / terrain.terrainData.heightmapResolution,
|
||
|
|
terrain.terrainData.size.z / terrain.terrainData.heightmapResolution);
|
||
|
|
m_Eroder.ErodeHeightmap(terrain.terrainData.size, brushXform.GetBrushXYBounds(), texelSize, commonUI.ModifierActive(BrushModifierKey.BRUSH_MOD_INVERT));
|
||
|
|
m_Eroder.ErodeHeightmap(terrain.terrainData.size, brushXform.GetBrushXYBounds(), texelSize, Event.current.control);
|
||
|
|
|
||
|
|
Material mat = GetPaintMaterial();
|
||
|
|
var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
|
||
|
|
Utility.SetFilterRT(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", m_Eroder.outputTextures["Height"]);
|
||
|
|
mat.SetVector("_BrushParams", brushParams);
|
||
|
|
|
||
|
|
brushRender.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
|
||
|
|
brushRender.RenderBrush(paintContext, mat, 0);
|
||
|
|
RTUtils.Release(brushMask);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
#region IValidationTests
|
||
|
|
public virtual string ValidateAndGenerateUserMessage(Terrain terrain)
|
||
|
|
{
|
||
|
|
if (terrain.terrainData.heightmapResolution < 1025)
|
||
|
|
return "Erosion tools work best with a heightmap resolution of 1025 or greater.";
|
||
|
|
|
||
|
|
return "";
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
#region Analytics
|
||
|
|
private TerrainToolsAnalytics.IBrushParameter[] UpdateAnalyticParameters()
|
||
|
|
{
|
||
|
|
HydraulicErosionSettings settings = m_Eroder.m_ErosionSettings;
|
||
|
|
return new TerrainToolsAnalytics.IBrushParameter[]{
|
||
|
|
//Advanced Section
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_SimulationScale.text, Value = settings.m_SimScale.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_TimeDelta.text, Value = settings.m_HydroTimeDelta.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_NumIterations.text, Value = settings.m_HydroIterations.value},
|
||
|
|
|
||
|
|
//Thermal Smoothing
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_ThermalDTScalar.text, Value = settings.m_ThermalTimeDelta},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_NumIterations.text, Value = settings.m_ThermalIterations},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_AngleOfRepose.text, Value = settings.m_ThermalReposeAngle},
|
||
|
|
|
||
|
|
//Water Transport
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_PrecipitationRate.text, Value = settings.m_PrecipRate.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_EvaporationRate.text, Value = settings.m_EvaporationRate.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_FlowRate.text, Value = settings.m_FlowRate.value},
|
||
|
|
|
||
|
|
//Sediment Transport
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_SedimentCap.text, Value = settings.m_SedimentCapacity.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_SedimentDeposit.text, Value = settings.m_SedimentDepositRate.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_SedimentDissolve.text, Value = settings.m_SedimentDissolveRate.value},
|
||
|
|
|
||
|
|
//Riverbank
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_RiverbankDeposit.text, Value = settings.m_RiverBankDepositRate.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_RiverbankDissolve.text, Value = settings.m_RiverBankDissolveRate.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_RiverbedDeposit.text, Value = settings.m_RiverBedDepositRate.value},
|
||
|
|
new TerrainToolsAnalytics.BrushParameter<float>{Name = Erosion.Styles.m_RiverbedDissolve.text, Value = settings.m_RiverBedDissolveRate.value},
|
||
|
|
|
||
|
|
};
|
||
|
|
}
|
||
|
|
#endregion
|
||
|
|
}
|
||
|
|
}
|