using UnityEngine;
using UnityEngine.Experimental.TerrainAPI;
using UnityEditor.ShortcutManagement;
namespace UnityEditor.Experimental.TerrainAPI
{
public class TwistHeightTool : TerrainPaintTool<TwistHeightTool>
{
#if UNITY_2019_1_OR_NEWER
[Shortcut("Terrain/Select Twist Tool", typeof(TerrainToolShortcutContext))]
static void SelectShortcut(ShortcutArguments args) {
TerrainToolShortcutContext context = (TerrainToolShortcutContext)args.context;
context.SelectPaintTool<TwistHeightTool>();
TerrainToolsAnalytics.OnShortcutKeyRelease("Select Twist Tool");
}
#endif
private bool m_ShowControls = true;
[SerializeField]
IBrushUIGroup m_commonUI;
private IBrushUIGroup commonUI
{
get
{
if( m_commonUI == null )
{
LoadSettings();
m_commonUI = new DefaultBrushUIGroup("TwistTool", UpdateAnalyticParameters);
m_commonUI.OnEnterToolMode();
}
return m_commonUI;
}
}
[SerializeField]
float m_TwistAmount = 100.0f;
[SerializeField]
bool m_AffectMaterials = true;
[SerializeField]
bool m_AffectHeight = true;
Material m_Material = null;
Material GetPaintMaterial()
{
if (m_Material == null)
m_Material = new Material(Shader.Find("Hidden/TerrainTools/TwistHeight"));
return m_Material;
}
public override string GetName()
{
return "Transform/Twist";
}
public override string GetDesc()
{
return "Click to Twist the terrain height.";
}
public override void OnEnterToolMode() {
base.OnEnterToolMode();
commonUI.OnEnterToolMode();
}
public override void OnExitToolMode() {
base.OnExitToolMode();
commonUI.OnExitToolMode();
}
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;
}
if(commonUI.isRaycastHitUnderCursorValid)
{
Texture brushTexture = editContext.brushTexture;
using(IBrushRenderPreviewUnderCursor brushRender = new BrushRenderPreviewUIGroupUnderCursor(commonUI, "Twist", editContext.brushTexture))
{
//draw brush circle
if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
{
Material material = TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial();
PaintContext ctx = brushRender.AcquireHeightmap(false, brushXform.GetBrushXYBounds(), 1);
brushRender.RenderBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, brushXform, TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial(), 0);
// draw result preview
{
float finalTwistAmount = m_TwistAmount * -0.002f; //scale to a reasonable value and negate so default mode is clockwise
if (Event.current.shift) {
finalTwistAmount *= -1.0f;
}
ApplyBrushInternal(brushRender, ctx, commonUI.brushStrength, finalTwistAmount, brushTexture, brushXform);
// restore old render target
RenderTexture.active = ctx.oldRenderTexture;
material.SetTexture("_HeightmapOrig", ctx.sourceRenderTexture);
brushRender.RenderBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.DestinationRenderTexture, brushXform, material, 1);
}
}
}
}
}
public override void OnInspectorGUI(Terrain terrain, IOnInspectorGUI editContext)
{
EditorGUI.BeginChangeCheck();
commonUI.OnInspectorGUI(terrain, editContext);
m_ShowControls = TerrainToolGUIHelper.DrawHeaderFoldoutForBrush(Styles.controlHeader, m_ShowControls, Reset);
if(m_ShowControls)
{
EditorGUILayout.BeginVertical("GroupBox");
{
EditorGUILayout.BeginHorizontal();
{
EditorGUILayout.PrefixLabel(Styles.targets);
m_AffectMaterials = GUILayout.Toggle(m_AffectMaterials, Styles.materials, GUI.skin.button);
m_AffectHeight = GUILayout.Toggle(m_AffectHeight, Styles.heightmap, GUI.skin.button);
}
EditorGUILayout.EndHorizontal();
m_TwistAmount = EditorGUILayout.Slider(Styles.twistAmount, m_TwistAmount, -100.0f, 100.0f);
}
EditorGUILayout.EndVertical();
}
if (EditorGUI.EndChangeCheck())
{
SaveSetting();
Save(true);
TerrainToolsAnalytics.OnParameterChange();
}
}
private void Reset()
{
m_TwistAmount = 100.0f;
m_AffectMaterials = true;
m_AffectHeight = true;
}
void ApplyBrushInternal(IPaintContextRender renderer, PaintContext paintContext, float brushStrength, float finalTwistAmount, Texture brushTexture, BrushTransform brushXform) {
Material mat = GetPaintMaterial();
if(Event.current.control) { finalTwistAmount *= -1.0f; }
Vector4 brushParams = new Vector4(brushStrength, 0.0f, finalTwistAmount, 0.0f);
mat.SetTexture("_BrushTex", brushTexture);
mat.SetVector("_BrushParams", brushParams);
renderer.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
renderer.RenderBrush(paintContext, mat, 0);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
commonUI.OnPaint(terrain, editContext);
if(commonUI.allowPaint)
{
Texture brushTexture = editContext.brushTexture;
using(IBrushRenderUnderCursor brushRender = new BrushRenderUIGroupUnderCursor(commonUI, "Twist", brushTexture))
{
if(brushRender.CalculateBrushTransform(out BrushTransform brushXform))
{
float finalTwistAmount = m_TwistAmount * -0.001f; //scale to a reasonable value and negate so default mode is clockwise
if(Event.current.shift)
{
finalTwistAmount *= -1.0f;
}
Material mat = GetPaintMaterial();
Vector4 brushParams = new Vector4(commonUI.brushStrength, 0.0f, finalTwistAmount, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
//twist splat map
if (m_AffectMaterials)
{
for (int i = 0; i < terrain.terrainData.terrainLayers.Length; i++)
{
TerrainLayer layer = terrain.terrainData.terrainLayers[i];
PaintContext paintContext = brushRender.AcquireTexture(true, brushXform.GetBrushXYBounds(), layer);
var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
Utility.SetFilterRT(commonUI, paintContext.sourceRenderTexture, brushMask, mat);
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
brushRender.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
brushRender.RenderBrush(paintContext, mat, 0);
brushRender.Release(paintContext);
RTUtils.Release(brushMask);
}
}
//twist height map
if(m_AffectHeight)
{
PaintContext paintContext = brushRender.AcquireHeightmap(true, brushXform.GetBrushXYBounds(), 1);
var brushMask = RTUtils.GetTempHandle(paintContext.sourceRenderTexture.width, paintContext.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
Utility.SetFilterRT(commonUI, paintContext.sourceRenderTexture, brushMask, mat);
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
ApplyBrushInternal(brushRender, paintContext, commonUI.brushStrength, finalTwistAmount, brushTexture, brushXform);
brushRender.Release(paintContext);
RTUtils.Release(brushMask);
}
}
}
}
return false;
}
private static class Styles
{
public static readonly GUIContent controlHeader = EditorGUIUtility.TrTextContent("Twist Height Controls");
public static readonly GUIContent targets = EditorGUIUtility.TrTextContent("Targets", "Determines which textures the twist operations target");
public static readonly GUIContent twistAmount = EditorGUIUtility.TrTextContent("Twist Amount", "Negative values twist clockwise, Positive values twist counter clockwise");
public static readonly GUIContent materials = EditorGUIUtility.TrTextContent("Materials");
public static readonly GUIContent heightmap = EditorGUIUtility.TrTextContent("Heightmap");
}
private void SaveSetting()
{
EditorPrefs.SetFloat("Unity.TerrainTools.Twist.TwistAmount", m_TwistAmount);
EditorPrefs.SetBool("Unity.TerrainTools.Twist.Heightmap", m_AffectHeight);
EditorPrefs.SetBool("Unity.TerrainTools.Twist.Materials", m_AffectMaterials);
}
private void LoadSettings()
{
m_TwistAmount = EditorPrefs.GetFloat("Unity.TerrainTools.Twist.TwistAmount", 100.0f);
m_AffectHeight = EditorPrefs.GetBool("Unity.TerrainTools.Twist.Heightmap", true);
m_AffectMaterials = EditorPrefs.GetBool("Unity.TerrainTools.Twist.Materials", true);
}
#region Analytics
private TerrainToolsAnalytics.IBrushParameter[] UpdateAnalyticParameters() => new TerrainToolsAnalytics.IBrushParameter[]{
new TerrainToolsAnalytics.BrushParameter<float>{Name = Styles.twistAmount.text, Value = m_TwistAmount},
new TerrainToolsAnalytics.BrushParameter<bool>{Name = "Affect Height", Value = m_AffectHeight},
new TerrainToolsAnalytics.BrushParameter<bool>{Name = "Affect Material", Value = m_AffectMaterials},
};
#endregion
}
}