private void SpawnGrassesOnTerrain(GStylizedTerrain t, Color[] maskData, List <Vector4> vertices)
{
int grassIndex = -1;
List <GGrassInstance> grassInstances = new List <GGrassInstance>();
Vector2 v0 = Vector2.zero;
Vector2 v1 = Vector2.zero;
Vector2 v2 = Vector2.zero;
Vector2 center = Vector2.zero;
float radius = 0;
Vector2 pos = Vector2.zero;
Vector3 bary = Vector3.zero;
float maskValue = 0;
int sampleCount = Mathf.Clamp(GrassDensity * GrassDensity / 10, 1, 1000);
int trisCount = vertices.Count / 3;
for (int i = 0; i < trisCount; ++i)
{
v0 = t.WorldPointToUV(vertices[i * 3 + 0]);
v1 = t.WorldPointToUV(vertices[i * 3 + 1]);
v2 = t.WorldPointToUV(vertices[i * 3 + 2]);
center = (v0 + v1 + v2) / 3;
radius = Vector2.Distance(center, v0);
for (int s = 0; s < sampleCount; ++s)
{
grassIndex = GrassPrototypeIndices[Random.Range(0, GrassPrototypeIndices.Count)];
pos = center + Random.insideUnitCircle * radius;
if (pos.x < 0 || pos.x > 1 ||
pos.y < 0 || pos.x > 1)
{
continue;
}
GUtilities.CalculateBarycentricCoord(pos, v0, v1, v2, ref bary);
if (bary.x < 0 || bary.y < 0 || bary.z < 0)
{
continue;
}
maskValue = GUtilities.GetColorBilinear(maskData, MaskResolution, MaskResolution, pos).r;
if (Random.value > maskValue)
{
continue;
}
GGrassInstance grass = GGrassInstance.Create(grassIndex);
grass.Position = new Vector3(pos.x, 0, pos.y);
grass.Rotation = Quaternion.Euler(0, Random.Range(MinRotation, MaxRotation), 0);
grass.Scale = Vector3.Lerp(MinScale, MaxScale, Random.value);
grassInstances.Add(grass);
}
}
t.TerrainData.Foliage.AddGrassInstances(grassInstances);
}
private static void RestoreGrassInstances(GStylizedTerrain t, string backupName)
{
string prototyeIndicesFileName = string.Format("{0}_{1}_{2}", t.TerrainData.Id, GBackupFile.GRASS_SUFFIX, GBackupFile.PROTOTYPEINDEX_SUFFIX);
string positionsFileName = string.Format("{0}_{1}_{2}", t.TerrainData.Id, GBackupFile.GRASS_SUFFIX, GBackupFile.POSITION_SUFFIX);
string rotationsFileName = string.Format("{0}_{1}_{2}", t.TerrainData.Id, GBackupFile.GRASS_SUFFIX, GBackupFile.ROTATION_SUFFIX);
string scalesFileName = string.Format("{0}_{1}_{2}", t.TerrainData.Id, GBackupFile.GRASS_SUFFIX, GBackupFile.SCALE_SUFFIX);
byte[] protoIndicesData = GBackupFile.ReadAllBytes(backupName, prototyeIndicesFileName);
byte[] positionsData = GBackupFile.ReadAllBytes(backupName, positionsFileName);
byte[] rotationData = GBackupFile.ReadAllBytes(backupName, rotationsFileName);
byte[] scalesData = GBackupFile.ReadAllBytes(backupName, scalesFileName);
if (protoIndicesData != null &&
positionsData != null &&
rotationData != null &&
scalesData != null)
{
protoIndicesData = GCompressor.Decompress(protoIndicesData);
positionsData = GCompressor.Decompress(positionsData);
rotationData = GCompressor.Decompress(rotationData);
scalesData = GCompressor.Decompress(scalesData);
int[] indices = new int[protoIndicesData.Length / sizeof(int)];
float[] positions = new float[positionsData.Length / sizeof(float)];
float[] rotations = new float[rotationData.Length / sizeof(float)];
float[] scales = new float[scalesData.Length / sizeof(float)];
Buffer.BlockCopy(protoIndicesData, 0, indices, 0, protoIndicesData.Length);
Buffer.BlockCopy(positionsData, 0, positions, 0, positionsData.Length);
Buffer.BlockCopy(rotationData, 0, rotations, 0, rotationData.Length);
Buffer.BlockCopy(scalesData, 0, scales, 0, scalesData.Length);
List <GGrassInstance> grasses = new List <GGrassInstance>();
for (int i = 0; i < indices.Length; ++i)
{
GGrassInstance grass = GGrassInstance.Create(indices[i]);
grass.Position = new Vector3(
positions[i * 3 + 0],
positions[i * 3 + 1],
positions[i * 3 + 2]);
grass.Rotation = new Quaternion(
rotations[i * 4 + 0],
rotations[i * 4 + 1],
rotations[i * 4 + 2],
rotations[i * 4 + 3]);
grass.Scale = new Vector3(
scales[i * 3 + 0],
scales[i * 3 + 1],
scales[i * 3 + 2]);
grasses.Add(grass);
}
t.TerrainData.Foliage.ClearGrassInstances();
t.TerrainData.Foliage.AddGrassInstances(grasses);
t.TerrainData.SetDirty(GTerrainData.DirtyFlags.Foliage);
}
}
private void DoImportDetailLayer(int layerIndex, int[,] density, List <GGrassInstance> grasses)
{
GGrassPrototype prototype = DesData.Foliage.Grasses.Prototypes[layerIndex];
Rand rand = new Rand(layerIndex + SrcData.detailResolution);
int resolution = SrcData.detailResolution;
int d = 0;
float maxOffset = 1.0f / resolution;
Vector2 uv = Vector2.zero;
Vector3 pos = Vector3.zero;
for (int z = 0; z < resolution; ++z)
{
for (int x = 0; x < resolution; ++x)
{
d = density[z, x];
for (int i = 0; i < d; ++i)
{
if (rand.NextDouble() > GrassDensity)
{
continue;
}
uv.Set(
Mathf.InverseLerp(0, resolution - 1, x),
Mathf.InverseLerp(0, resolution - 1, z));
pos.Set(
(float)(uv.x + rand.NextDouble() * maxOffset),
0,
(float)(uv.y + rand.NextDouble() * maxOffset));
GGrassInstance grass = GGrassInstance.Create(layerIndex);
grass.Position = pos;
grass.Rotation = Quaternion.Euler(0, (float)rand.NextDouble() * 360f, 0);
grass.Scale = Mathf.Lerp(0.5f, 1f, (float)rand.NextDouble()) * Vector3.one;
grasses.Add(grass);
}
}
}
//GC.Collect();
}
private void SpawnGrassOnTerrain(GStylizedTerrain t, Color[] maskData, int layerIndex)
{
GFoliageStampLayer layer = Layers[layerIndex];
Vector3 centerPos = Vector3.zero;
Vector3 samplePos = Vector3.zero;
Vector2 uv = Vector2.zero;
float maskValue = 0;
Vector3 terrainSize = new Vector3(
t.TerrainData.Geometry.Width,
t.TerrainData.Geometry.Height,
t.TerrainData.Geometry.Length);
Vector3 scale = new Vector3(
GUtilities.InverseLerpUnclamped(0, terrainSize.x, Scale.x),
1,
GUtilities.InverseLerpUnclamped(0, terrainSize.z, Scale.z));
Matrix4x4 matrix = Matrix4x4.TRS(
t.WorldPointToNormalized(Position),
Rotation,
scale);
int grassIndex = -1;
int instanceCount = 0;
int attempt = 0;
int maxAttempt = layer.GrassInstanceCount * 100;
List <GGrassInstance> grasses = new List <GGrassInstance>();
#if UNITY_EDITOR
string title = "Stamping on " + t.name;
string info = string.Format("Layer: {0}", !string.IsNullOrEmpty(layer.Name) ? layer.Name : layerIndex.ToString());
int currentPercent = 0;
int attemptPercent = 0;
int instancePercent = 0;
GCommonGUI.CancelableProgressBar(title, info, 0);
#endif
while (instanceCount < layer.GrassInstanceCount && attempt <= maxAttempt)
{
attempt += 1;
#if UNITY_EDITOR
attemptPercent = (int)(attempt * 100.0f / maxAttempt);
instancePercent = (int)(instanceCount * 100.0f / layer.GrassInstanceCount);
if (currentPercent != Mathf.Max(attemptPercent, instancePercent))
{
currentPercent = Mathf.Max(attemptPercent, instancePercent);
GCommonGUI.CancelableProgressBar(title, string.Format("{0} ... {1}%", info, currentPercent), currentPercent / 100.0f);
}
#endif
grassIndex = layer.GrassIndices[Random.Range(0, layer.GrassIndices.Count)];
centerPos.Set(Random.value - 0.5f, 0, Random.value - 0.5f);
samplePos = matrix.MultiplyPoint(centerPos);
if (samplePos.x < 0 || samplePos.x > 1 ||
samplePos.z < 0 || samplePos.z > 1)
{
continue;
}
uv.Set(samplePos.x, samplePos.z);
maskValue = GUtilities.GetColorBilinear(maskData, MaskResolution, MaskResolution, uv).r;
if (Random.value > maskValue)
{
continue;
}
GGrassInstance grass = GGrassInstance.Create(grassIndex);
grass.Position = new Vector3(samplePos.x, 0, samplePos.z);
grass.Rotation = Quaternion.Euler(0, Random.Range(layer.MinRotation, layer.MaxRotation), 0);
grass.Scale = Vector3.Lerp(layer.MinScale, layer.MaxScale, Random.value);
grasses.Add(grass);
instanceCount += 1;
}
t.TerrainData.Foliage.AddGrassInstances(grasses);
#if UNITY_EDITOR
GCommonGUI.ClearProgressBar();
#endif
}
private void HandleSpawnGrass(GStylizedTerrain terrain, GFoliagePainterArgs args)
{
int grassIndex = -1;
Vector3 randomPos = Vector3.zero;
Vector3 rayOrigin = Vector3.zero;
Vector3 rayDirection = Vector3.down;
float sqrtTwo = Mathf.Sqrt(2);
Ray ray = new Ray();
RaycastHit samplePoint;
Vector3 bary0 = Vector3.zero;
Vector3 bary1 = Vector3.zero;
Vector2 maskUv = Vector2.zero;
Vector2 samplePointTexcoord = Vector2.zero;
Color maskColor = Color.white;
Texture2D clonedMask = null;
Texture2D terrainMask = null;
if (args.Mask != null)
{
clonedMask = GCommon.CloneAndResizeTexture(args.Mask, 256, 256);
}
if (args.EnableTerrainMask)
{
terrainMask = terrain.TerrainData.Mask.MaskMap;
}
int prototypeCount = terrain.TerrainData.Foliage.Grasses.Prototypes.Count;
int sampleCount = args.Density;
List <GGrassInstance> newInstances = new List <GGrassInstance>();
for (int i = 0; i < sampleCount; ++i)
{
grassIndex = args.GrassIndices[Random.Range(0, args.GrassIndices.Count)];
if (grassIndex < 0 || grassIndex >= prototypeCount)
{
continue;
}
randomPos = args.HitPoint + Random.insideUnitSphere * args.Radius * sqrtTwo;
rayOrigin.Set(
randomPos.x,
10000,
randomPos.z);
ray.origin = rayOrigin;
ray.direction = rayDirection;
if (terrain.Raycast(ray, out samplePoint, float.MaxValue))
{
GUtilities.CalculateBarycentricCoord(
new Vector2(samplePoint.point.x, samplePoint.point.z),
new Vector2(args.WorldPointCorners[0].x, args.WorldPointCorners[0].z),
new Vector2(args.WorldPointCorners[1].x, args.WorldPointCorners[1].z),
new Vector2(args.WorldPointCorners[2].x, args.WorldPointCorners[2].z),
ref bary0);
GUtilities.CalculateBarycentricCoord(
new Vector2(samplePoint.point.x, samplePoint.point.z),
new Vector2(args.WorldPointCorners[0].x, args.WorldPointCorners[0].z),
new Vector2(args.WorldPointCorners[2].x, args.WorldPointCorners[2].z),
new Vector2(args.WorldPointCorners[3].x, args.WorldPointCorners[3].z),
ref bary1);
if (bary0.x >= 0 && bary0.y >= 0 && bary0.z >= 0)
{
maskUv = bary0.x * Vector2.zero + bary0.y * Vector2.up + bary0.z * Vector2.one;
}
else if (bary1.x >= 0 && bary1.y >= 0 && bary1.z >= 0)
{
maskUv = bary1.x * Vector2.zero + bary1.y * Vector2.one + bary1.z * Vector2.right;
}
else
{
continue;
}
//sample mask
if (clonedMask != null)
{
maskColor = clonedMask.GetPixelBilinear(maskUv.x, maskUv.y);
if (Random.value > maskColor.grayscale)
{
continue;
}
}
//sample terrain mask
if (args.EnableTerrainMask)
{
samplePointTexcoord = samplePoint.textureCoord;
maskColor = terrainMask.GetPixelBilinear(samplePointTexcoord.x, samplePointTexcoord.y);
if (Random.value < maskColor.r)
{
continue;
}
}
//apply filter
GSpawnFilterArgs filterArgs = GSpawnFilterArgs.Create();
filterArgs.Terrain = terrain;
filterArgs.Position = samplePoint.point;
filterArgs.SurfaceNormal = samplePoint.normal;
filterArgs.SurfaceTexcoord = samplePoint.textureCoord;
List <Type> suitableFilter = SuitableFilterTypes;
if (args.Filters != null)
{
for (int fIndex = 0; fIndex < args.Filters.Length; ++fIndex)
{
if (args.Filters[fIndex] != null &&
args.Filters[fIndex].Ignore != true)
{
if (suitableFilter.Contains(args.Filters[fIndex].GetType()))
{
args.Filters[fIndex].Apply(ref filterArgs);
}
}
if (filterArgs.ShouldExclude)
{
break;
}
}
}
//spawn
if (filterArgs.ShouldExclude)
{
continue;
}
GGrassInstance grass = GGrassInstance.Create(grassIndex);
grass.Position = terrain.WorldPointToNormalized(filterArgs.Position);
grass.Rotation = filterArgs.Rotation;
grass.Scale = filterArgs.Scale;
newInstances.Add(grass);
}
}
terrain.TerrainData.Foliage.AddGrassInstances(newInstances);
if (clonedMask != null)
{
Object.DestroyImmediate(clonedMask);
}
}
