private GrassPrefab Duplicate(GrassPrefab source)
{
GrassPrefab dest = new GrassPrefab();
dest.type = source.type;
dest.prefab = source.prefab;
dest.billboard = source.billboard;
dest.mainColor = source.mainColor;
dest.secondairyColor = source.secondairyColor;
dest.linkColors = source.linkColors;
dest.minMaxHeight = source.minMaxHeight;
dest.minMaxWidth = source.minMaxWidth;
//Base
dest.seed = source.seed;
dest.probability = source.probability;
dest.heightRange = source.heightRange;
dest.slopeRange = source.slopeRange;
dest.curvatureRange = source.curvatureRange;
dest.layerMasks = new List <TerrainLayerMask>(source.layerMasks);
for (int i = 0; i < dest.layerMasks.Count; i++)
{
dest.layerMasks[i] = new TerrainLayerMask(source.layerMasks[i].layerID, source.layerMasks[i].threshold);
}
dest.collisionCheck = source.collisionCheck;
dest.rejectUnderwater = source.rejectUnderwater;
return(dest);
}
private void UpdateGrassItem(GrassPrefab item, DetailPrototype d)
{
d.healthyColor = item.mainColor;
d.dryColor = item.secondairyColor;
d.minHeight = item.minMaxHeight.x;
d.maxHeight = item.minMaxHeight.y;
d.minWidth = item.minMaxWidth.x;
d.maxWidth = item.minMaxWidth.y;
d.noiseSpread = item.noiseSize;
d.prototype = item.prefab;
d.prototypeTexture = item.billboard;
if (item.type == GrassType.Mesh && item.prefab)
{
d.renderMode = DetailRenderMode.Grass; //Actually mesh
d.usePrototypeMesh = true;
d.prototype = item.prefab;
d.prototypeTexture = null;
}
if (item.type == GrassType.Billboard && item.billboard)
{
d.renderMode = DetailRenderMode.GrassBillboard;
d.usePrototypeMesh = false;
d.prototypeTexture = item.billboard;
d.prototype = null;
}
}
public void UpdateProperties(GrassPrefab item)
{
foreach (Terrain terrain in terrains)
{
//Note only works when creating these copies :/
DetailPrototype[] detailPrototypes = terrain.terrainData.detailPrototypes;
DetailPrototype detailPrototype = GetGrassPrototype(item, terrain);
//Could have been removed
if (detailPrototype == null)
{
continue;
}
UpdateGrassItem(item, detailPrototype);
detailPrototypes[item.index] = detailPrototype;
terrain.terrainData.detailPrototypes = detailPrototypes;
#if UNITY_EDITOR
UnityEditor.EditorUtility.SetDirty(terrain);
UnityEditor.EditorUtility.SetDirty(terrain.terrainData);
#endif
}
}
private DetailPrototype GetGrassPrototype(GrassPrefab item, Terrain terrain)
{
if (item.index >= terrain.terrainData.detailPrototypes.Length)
{
return(null);
}
return(terrain.terrainData.detailPrototypes[item.index]);
}
public void SpawnGrass(GrassPrefab item, Terrain targetTerrain = null)
{
if (item.collisionCheck)
{
RebuildCollisionCacheIfNeeded();
}
item.instanceCount = 0;
if (targetTerrain == null)
{
foreach (Terrain terrain in terrains)
{
SpawnGrassOnTerrain(terrain, item);
}
}
else
{
SpawnGrassOnTerrain(targetTerrain, item);
}
onGrassRespawn?.Invoke(item);
}
private DetailPrototype GetGrassPrototype(GrassPrefab item, Terrain terrain)
{
return(terrain.terrainData.detailPrototypes[item.index]);
}
public void SpawnGrass(GrassPrefab item)
{
if (item.collisionCheck)
{
RebuildCollisionCacheIfNeeded();
}
item.instanceCount = 0;
foreach (Terrain terrain in terrains)
{
//2 texels per unit
//int density = Mathf.NextPowerOfTwo(Mathf.RoundToInt(terrain.terrainData.size.x * 2f));
//int[,] map = new int[density, density];
//terrain.terrainData.SetDetailResolution(density, terrain.terrainData.detailResolutionPerPatch);
#if UNITY_EDITOR
//UnityEditor.EditorUtility.DisplayProgressBar("Vegetation Spawner", "Spawning grass...", 1f);
#endif
int[,] map = terrain.terrainData.GetDetailLayer(0, 0, terrain.terrainData.detailWidth, terrain.terrainData.detailHeight, item.index);
for (int x = 0; x < terrain.terrainData.detailWidth; x++)
{
for (int y = 0; y < terrain.terrainData.detailHeight; y++)
{
InitializeSeed(x * y + item.seed);
//Default
int instanceCount = 1;
map[x, y] = 0;
//XZ world position
Vector3 wPos = terrain.DetailToWorld(y, x);
Vector2 normalizedPos = terrain.GetNormalizedPosition(wPos);
if (item.collisionCheck)
{
//Check for collision
if (InsideOccupiedCell(terrain, wPos, normalizedPos))
{
continue;
}
/* 1 second slower
* RaycastHit hit;
* if (Physics.Raycast(wPos + (Vector3.up * 50f), -Vector3.up, out hit, 100f, -1))
* {
* if (hit.collider.gameObject != terrain.gameObject)
* {
* continue;
* }
* }
*/
}
//Skip if failing probability check
if (((Random.value * 100f) <= item.probability) == false)
{
instanceCount = 0;
continue;
}
terrain.SampleHeight(normalizedPos, out _, out wPos.y, out _);
if (item.rejectUnderwater && wPos.y < waterHeight)
{
instanceCount = 0;
continue;
}
//Check height
if (wPos.y < item.heightRange.x || wPos.y > item.heightRange.y)
{
instanceCount = 0;
continue;
}
if (item.slopeRange.x > 0 || item.slopeRange.y < 90)
{
float slope = terrain.GetSlope(normalizedPos);
//Reject if slope check fails
if (slope < item.slopeRange.x || slope > item.slopeRange.y)
{
instanceCount = 0;
continue;
}
}
if (item.curvatureRange.x > 0 || item.curvatureRange.y < 1f)
{
float curvature = terrain.SampleConvexity(normalizedPos);
//0=concave, 0.5=flat, 1=convex
curvature = TerrainSampler.ConvexityToCurvature(curvature);
if (curvature < item.curvatureRange.x || curvature > item.curvatureRange.y)
{
instanceCount = 0;
continue;
}
}
//Reject based on layer masks
float spawnChance = 0f;
Vector2Int texelIndex = terrain.SplatmapTexelIndex(normalizedPos);
if (item.layerMasks.Count == 0)
{
spawnChance = 100f;
}
foreach (TerrainLayerMask layer in item.layerMasks)
{
Texture2D splat = terrain.terrainData.GetAlphamapTexture(GetSplatmapID(layer.layerID));
Color color = splat.GetPixel(texelIndex.x, texelIndex.y);
int channel = layer.layerID % 4;
float value = SampleChannel(color, channel);
if (value > 0)
{
value = Mathf.Clamp01(value - layer.threshold);
}
value *= 100f;
spawnChance += value;
}
InitializeSeed(x * y + item.seed);
if ((Random.value <= spawnChance) == false)
{
instanceCount = 0;
}
//if (instanceCount == 1) DebugPoints.Add(wPos, true, sampler.slope);
item.instanceCount += instanceCount;
//Passed all conditions, spawn one instance here
map[x, y] = instanceCount;
}
}
terrain.terrainData.SetDetailLayer(0, 0, item.index, map);
#if UNITY_EDITOR
UnityEditor.EditorUtility.ClearProgressBar();
#endif
}
onGrassRespawn?.Invoke(item);
}
private void DrawGrass()
{
EditorGUILayout.LabelField("Items", EditorStyles.boldLabel);
grassScrollPos = EditorGUILayout.BeginScrollView(grassScrollPos, EditorStyles.textArea, GUILayout.Height(thumbSize + 10f));
using (new EditorGUILayout.HorizontalScope())
{
for (int i = 0; i < script.grassPrefabs.Count; i++)
{
Texture2D thumb = AssetPreview.GetAssetPreview(script.grassPrefabs[i].prefab);
if (script.grassPrefabs[i].type == SpawnerBase.GrassType.Billboard)
{
thumb = script.grassPrefabs[i].billboard;
}
if (thumb == null)
{
thumb = EditorGUIUtility.IconContent("d_BuildSettings.Broadcom").image as Texture2D;
}
if (GUILayout.Button(new GUIContent("", thumb), (selectedGrassID == i) ? VegetationSpawnerEditor.PreviewTexSelected : VegetationSpawnerEditor.PreviewTex, GUILayout.MinHeight(thumbSize), GUILayout.MaxWidth(thumbSize), GUILayout.MaxHeight(thumbSize)))
{
selectedGrassID = i;
}
}
}
EditorGUILayout.EndScrollView();
//Edge case: Clamp in case there's a switch to scene with less items
selectedGrassID = Mathf.Min(selectedGrassID, script.grassPrefabs.Count - 1);
VegetationSpawner.GrassPrefab grass = script.grassPrefabs.Count > 0 ? script.grassPrefabs[selectedGrassID] : null;
using (new EditorGUILayout.HorizontalScope())
{
if (grass != null)
{
EditorGUILayout.LabelField("Instances: " + grass.instanceCount.ToString("##,#"), EditorStyles.miniLabel);
}
GUILayout.FlexibleSpace();
if (GUILayout.Button(new GUIContent("Add", EditorGUIUtility.IconContent(EditorGUIUtility.isProSkin ? "d_Toolbar Plus" : "Toolbar Plus").image, "Add new item")))
{
VegetationSpawner.GrassPrefab newGrass = new SpawnerBase.GrassPrefab();
script.grassPrefabs.Add(newGrass);
newGrass.seed = Random.Range(0, 9999);
selectedGrassID = script.grassPrefabs.Count - 1;
newGrass.index = script.grassPrefabs.Count;
script.RefreshGrassPrototypes();
}
if (GUILayout.Button(new GUIContent("", EditorGUIUtility.IconContent("TreeEditor.Duplicate").image, "Duplicate item")))
{
GrassPrefab newGrass = Duplicate(script.grassPrefabs[selectedGrassID]);
script.grassPrefabs.Add(newGrass);
selectedGrassID = script.grassPrefabs.Count - 1;
newGrass.index = script.grassPrefabs.Count;
script.RefreshGrassPrototypes();
//Spawn it now so changes are visible
script.SpawnGrass(script.grassPrefabs[selectedGrassID]);
}
if (GUILayout.Button(new GUIContent("", EditorGUIUtility.IconContent("d_TreeEditor.Trash").image, "Remove")))
{
script.grassPrefabs.RemoveAt(selectedGrassID);
selectedGrassID = script.grassPrefabs.Count - 1;
script.RefreshGrassPrototypes();
}
}
if (grass != null)
{
Undo.RecordObject(script, "Modified grass item");
serializedObject.Update();
using (var grassChange = new EditorGUI.ChangeCheckScope())
{
EditorGUILayout.LabelField("Appearance", EditorStyles.boldLabel);
grass.type = (SpawnerBase.GrassType)EditorGUILayout.Popup("Render type", (int)grass.type, new string[] { "Mesh", "Billboard" });
if (grass.type == SpawnerBase.GrassType.Mesh)
{
grass.prefab = EditorGUILayout.ObjectField("Prefab", grass.prefab, typeof(GameObject), true) as GameObject;
}
if (grass.type == SpawnerBase.GrassType.Billboard)
{
grass.billboard = EditorGUILayout.ObjectField("Billboard", grass.billboard, typeof(Texture2D), true) as Texture2D;
}
grass.mainColor = EditorGUILayout.ColorField("Main", grass.mainColor);
grass.linkColors = EditorGUILayout.Toggle(new GUIContent("Link", "Set the main and secondary color with one value"), grass.linkColors);
if (grass.linkColors)
{
grass.secondairyColor = grass.mainColor;
}
else
{
grass.secondairyColor = EditorGUILayout.ColorField("Secondary", grass.secondairyColor);
}
VegetationSpawnerEditor.DrawRangeSlider(new GUIContent("Width", "Min/max width of the mesh"), ref grass.minMaxWidth, 0f, 2f);
VegetationSpawnerEditor.DrawRangeSlider(new GUIContent("Length", "Min/max length of the mesh"), ref grass.minMaxHeight, 0f, 2f);
if (grassChange.changed)
{
EditorUtility.SetDirty(target);
script.UpdateProperties(grass);
}
EditorGUILayout.Space();
EditorGUILayout.LabelField("Spawning rules", EditorStyles.boldLabel);
using (new EditorGUILayout.HorizontalScope())
{
grass.seed = EditorGUILayout.IntField("Seed", grass.seed, GUILayout.MaxWidth(EditorGUIUtility.labelWidth + 50f));
if (GUILayout.Button("Randomize", GUILayout.MaxWidth(100f)))
{
grass.seed = Random.Range(0, 99999);
}
}
grass.probability = EditorGUILayout.Slider("Spawn chance %", grass.probability, 0f, 100f);
EditorGUILayout.Space();
grass.collisionCheck = EditorGUILayout.Toggle(new GUIContent("Collision check", "Take into account the collision cache to avoid spawning inside colliders (see Settings tab)"), grass.collisionCheck);
grass.rejectUnderwater = EditorGUILayout.Toggle(new GUIContent("Remove underwater", "The water height level can be set in the settings tab"), grass.rejectUnderwater);
VegetationSpawnerEditor.DrawRangeSlider(new GUIContent("Height range", "Min/max height this item can spawn at"), ref grass.heightRange, 0f, 1000f);
VegetationSpawnerEditor.DrawRangeSlider(new GUIContent("Slope range", "Min/max slope (0-90 degrees) this item can spawn at"), ref grass.slopeRange, 0f, 90f);
VegetationSpawnerEditor.DrawRangeSlider(new GUIContent("Curvature range", "0=Concave (bowl), 0.5=flat, 1=convex (edge)"), ref grass.curvatureRange, 0f, 1f);
EditorGUILayout.Space();
LayerMaskSettings(grass.layerMasks);
if (grassChange.changed)
{
serializedObject.ApplyModifiedProperties();
}
}
EditorGUILayout.Space();
if (GUILayout.Button(new GUIContent(" Respawn", EditorGUIUtility.IconContent("d_Refresh").image), GUILayout.Height(30f)))
{
Stopwatch sw = new Stopwatch();
sw.Restart();
script.SpawnGrass(script.grassPrefabs[selectedGrassID]);
sw.Stop();
Log.Add("Respawning grass: " + sw.Elapsed.Seconds + " seconds...");
}
}
}
private void SpawnGrassOnTerrain(Terrain terrain, GrassPrefab item)
{
//int[,] map = terrain.terrainData.GetDetailLayer(0, 0, terrain.terrainData.detailWidth, terrain.terrainData.detailHeight, item.index);
int[,] map = new int[terrain.terrainData.detailWidth, terrain.terrainData.detailHeight];
int counter = 0;
int cellCount = terrain.terrainData.detailWidth * terrain.terrainData.detailHeight;
if (item.enabled)
{
for (int x = 0; x < terrain.terrainData.detailWidth; x++)
{
for (int y = 0; y < terrain.terrainData.detailHeight; y++)
{
counter++;
#if UNITY_EDITOR
//Show progress bar every 10%
if (counter % (cellCount / 10) == 0)
{
UnityEditor.EditorUtility.DisplayProgressBar("Vegetation Spawner", "Spawning " + item.name + " on " + terrain.name, (float)counter / (float)cellCount);
}
#endif
InitializeSeed(x * y + item.seed);
//Default
int instanceCount = 1;
//XZ world position
Vector3 wPos = terrain.DetailToWorld(y, x);
Vector2 normalizedPos = terrain.GetNormalizedPosition(wPos);
//Skip if failing probability check
if (((Random.value * 100f) <= item.probability) == false)
{
instanceCount = 0;
continue;
}
if (item.collisionCheck)
{
//Check for collision
if (InsideOccupiedCell(terrain, wPos, normalizedPos))
{
instanceCount = 0;
continue;
}
}
terrain.SampleHeight(normalizedPos, out _, out wPos.y, out _);
if (item.rejectUnderwater && wPos.y < waterHeight)
{
instanceCount = 0;
continue;
}
//Check height
if (wPos.y < item.heightRange.x || wPos.y > item.heightRange.y)
{
instanceCount = 0;
continue;
}
if (item.slopeRange.x > 0 || item.slopeRange.y < 90)
{
float slope = terrain.GetSlope(normalizedPos);
//Reject if slope check fails
if (slope < item.slopeRange.x || slope > item.slopeRange.y)
{
instanceCount = 0;
continue;
}
}
if (item.curvatureRange.x > 0 || item.curvatureRange.y < 1f)
{
float curvature = terrain.SampleConvexity(normalizedPos);
//0=concave, 0.5=flat, 1=convex
curvature = TerrainSampler.ConvexityToCurvature(curvature);
if (curvature < item.curvatureRange.x || curvature > item.curvatureRange.y)
{
instanceCount = 0;
continue;
}
}
//Reject based on layer masks
float spawnChance = 0f;
if (item.layerMasks.Count == 0)
{
spawnChance = 100f;
}
else
{
splatmapTexelIndex = terrain.SplatmapTexelIndex(normalizedPos);
}
foreach (TerrainLayerMask layer in item.layerMasks)
{
Texture2D splat = terrain.terrainData.GetAlphamapTexture(GetSplatmapID(layer.layerID));
m_splatmapColor = splat.GetPixel(splatmapTexelIndex.x, splatmapTexelIndex.y);
int channel = layer.layerID % 4;
float value = SampleChannel(m_splatmapColor, channel);
if (value > 0)
{
value = Mathf.Clamp01(value - layer.threshold);
}
value *= 100f;
spawnChance += value;
}
InitializeSeed(x * y + item.seed);
if ((Random.value <= spawnChance) == false)
{
instanceCount = 0;
}
//if (instanceCount == 1) DebugPoints.Instance.Add(wPos, true, 0f);
item.instanceCount += instanceCount;
//Passed all conditions, spawn one instance here
map[x, y] = instanceCount;
}
}
}
terrain.terrainData.SetDetailLayer(0, 0, item.index, map);
#if UNITY_EDITOR
UnityEditor.EditorUtility.ClearProgressBar();
#endif
}
