public static void UpdateDetailLayer(TerrainData _terrain_data)
{
//_terrain_data.SetDetailResolution( TerrainDetailResolution, TerrainPatchDetail );
_terrain_data.wavingGrassStrength = 0.25f;
_terrain_data.wavingGrassAmount = 0.25f;
DetailPrototype[] _details = new DetailPrototype[10];
int _index = 0;
_details[_index] = new DetailPrototype();
_details[_index].prototypeTexture = (Texture2D)Resources.Load("Grass/Grass01");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1.5f;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 1;
_details[_index] = new DetailPrototype();
_details[_index].prototypeTexture = (Texture2D)Resources.Load("Grass/Grass02");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1.5f;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 2;
_details[_index] = new DetailPrototype();
_details[_index].prototypeTexture = (Texture2D)Resources.Load("Grass/Grass03");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1.5f;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 3;
_details[_index] = new DetailPrototype();
_details[_index].prototypeTexture = (Texture2D)Resources.Load("Grass/Flower01");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1f;
_details[_index].healthyColor = Color.white;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 4;
_details[_index] = new DetailPrototype();
_details[_index].prototypeTexture = (Texture2D)Resources.Load("Grass/Flower02");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1f;
_details[_index].healthyColor = Color.yellow;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 5;
_details[_index] = new DetailPrototype();
_details[_index].usePrototypeMesh = true;
_details[_index].prototype = (GameObject)Resources.Load("Bushes/Fern");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1f;
_details[_index].healthyColor = Color.white;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 6;
_details[_index] = new DetailPrototype();
_details[_index].usePrototypeMesh = true;
_details[_index].prototype = (GameObject)Resources.Load("Bushes/Bush1");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1f;
_details[_index].healthyColor = Color.white;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 7;
_details[_index] = new DetailPrototype();
_details[_index].usePrototypeMesh = true;
_details[_index].prototype = (GameObject)Resources.Load("Bushes/Bush2");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1f;
_details[_index].healthyColor = Color.white;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 8;
_details[_index] = new DetailPrototype();
_details[_index].usePrototypeMesh = true;
_details[_index].prototype = (GameObject)Resources.Load("Bushes/Bush3");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1f;
_details[_index].healthyColor = Color.white;
_details[_index].renderMode = DetailRenderMode.Grass;
_index = 9;
_details[_index] = new DetailPrototype();
_details[_index].usePrototypeMesh = true;
_details[_index].prototype = (GameObject)Resources.Load("Bushes/Bush4");
_details[_index].minWidth = 0.25f;
_details[_index].maxWidth = 1f;
_details[_index].minHeight = 0.25f;
_details[_index].maxHeight = 1f;
_details[_index].healthyColor = Color.white;
_details[_index].renderMode = DetailRenderMode.Grass;
_terrain_data.detailPrototypes = _details;
TerrainDetailResolution = _terrain_data.detailResolution;
int[,] _density_map_00 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_01 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_02 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_03 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_04 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_bush_00 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_bush_01 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_bush_02 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_bush_03 = new int[TerrainDetailResolution, TerrainDetailResolution];
int[,] _density_map_bush_04 = new int[TerrainDetailResolution, TerrainDetailResolution];
float _x_pos_m = (float)_terrain_data.size.x / (float)TerrainDetailResolution;
float _y_pos_m = (float)_terrain_data.size.z / (float)TerrainDetailResolution;
if (TerrainGrassDensity > 0 || TerrainMeshDensity > 0)
{
for (int a = 0; a < TerrainDetailResolution; a++)
{
for (int b = 0; b < TerrainDetailResolution; b++)
{
float _x = MathTools.Normalize(a * _x_pos_m, 0, _terrain_data.size.x);
float _y = MathTools.Normalize(b * _y_pos_m, 0, _terrain_data.size.z);
Vector3 _ground = _terrain_data.GetInterpolatedNormal(_y, _x);
float _angle = Mathf.Abs(Vector3.Angle(_ground, Vector3.up));
float _f = 5;
//float _m = Mathf.Clamp01( 1 - ( _angle / TerrainGrassAngle ) );
if (TerrainGrassDensity > 0)
{
_density_map_00[a, b] = Mathf.RoundToInt(UnityEngine.Random.Range(TerrainGrassDensity * 0.5f, TerrainGrassDensity) * MathTools.NormalizeRange(_angle, -_f, TerrainGrassAngle + _f, _f));
_f = 5;
_density_map_01[a, b] = Mathf.RoundToInt(UnityEngine.Random.Range(TerrainGrassDensity * 0.25f, TerrainGrassDensity * 0.3f) * MathTools.NormalizeRange(_angle, 0, TerrainGrassAngle + _f, _f));
_f = 3;
_density_map_02[a, b] = Mathf.RoundToInt(UnityEngine.Random.Range(TerrainGrassDensity * 0.15f, TerrainGrassDensity * 0.25f) * MathTools.NormalizeRange(_angle, -_f * 0.5f, TerrainGrassAngle + _f, _f));
_f = 2;
_density_map_03[a, b] = Mathf.RoundToInt(UnityEngine.Random.Range(TerrainGrassDensity * 0.1f, TerrainGrassDensity * 0.5f) * MathTools.NormalizeRange(_angle, -_f, (TerrainGrassAngle * 0.25f) + _f, _f));
_f = 2;
_density_map_04[a, b] = Mathf.RoundToInt(UnityEngine.Random.Range(TerrainGrassDensity * 0.1f, TerrainGrassDensity * 0.5f) * MathTools.NormalizeRange(_angle, -_f, (TerrainGrassAngle * 0.25f) + _f, _f));
}
if (TerrainMeshDensity > 0)
{
_f = 5;
_density_map_bush_00[a, b] = Mathf.RoundToInt((UnityEngine.Random.Range(0, Mathf.RoundToInt(100 / TerrainMeshDensity)) == 0 ? 1:0) * MathTools.NormalizeRange(_angle, (TerrainGrassAngle * 0.5f) - _f, (TerrainGrassAngle * 2f) + _f, _f));
_f = 2;
_density_map_bush_01[a, b] = Mathf.RoundToInt((UnityEngine.Random.Range(0, Mathf.RoundToInt(500 / TerrainMeshDensity)) == 0 ? 1:0) * MathTools.NormalizeRange(_angle, _f, (TerrainMeshAngle * 1.5f) + _f, _f));
_f = 2;
_density_map_bush_03[a, b] = Mathf.RoundToInt((UnityEngine.Random.Range(0, Mathf.RoundToInt(500 / TerrainMeshDensity)) == 0 ? 1:0) * MathTools.NormalizeRange(_angle, _f, (TerrainMeshAngle * 1.5f) + _f, _f));
_f = 2;
_density_map_bush_03[a, b] = Mathf.RoundToInt((UnityEngine.Random.Range(0, Mathf.RoundToInt(500 / TerrainMeshDensity)) == 0 ? 1:0) * MathTools.NormalizeRange(_angle, _f, (TerrainMeshAngle * 1.5f) + _f, _f));
_f = 2;
_density_map_bush_04[a, b] = Mathf.RoundToInt((UnityEngine.Random.Range(0, Mathf.RoundToInt(500 / TerrainMeshDensity)) == 0 ? 1:0) * MathTools.NormalizeRange(_angle, _f, (TerrainMeshAngle * 1.5f) + _f, _f));
}
}
}
}
_terrain_data.SetDetailLayer(0, 0, 0, _density_map_00);
_terrain_data.SetDetailLayer(0, 0, 1, _density_map_01);
_terrain_data.SetDetailLayer(0, 0, 2, _density_map_02);
_terrain_data.SetDetailLayer(0, 0, 3, _density_map_03);
_terrain_data.SetDetailLayer(0, 0, 4, _density_map_04);
_terrain_data.SetDetailLayer(0, 0, 5, _density_map_bush_00);
_terrain_data.SetDetailLayer(0, 0, 6, _density_map_bush_01);
_terrain_data.SetDetailLayer(0, 0, 7, _density_map_bush_02);
_terrain_data.SetDetailLayer(0, 0, 8, _density_map_bush_03);
_terrain_data.SetDetailLayer(0, 0, 9, _density_map_bush_04);
}
public static void UpdateSplatmap(TerrainData _terrain_data)
{
SplatPrototype[] _terrain_texture = new SplatPrototype[6];
_terrain_texture[0] = new SplatPrototype();
_terrain_texture[0].texture = (Texture2D)Resources.Load("Textures/Grass (Meadows)");
_terrain_texture[0].tileSize = new Vector2(5, 5);
_terrain_texture[1] = new SplatPrototype();
_terrain_texture[1].texture = (Texture2D)Resources.Load("Textures/Grass (Forest)");
_terrain_texture[1].tileSize = new Vector2(5, 5);
_terrain_texture[2] = new SplatPrototype();
_terrain_texture[2].texture = (Texture2D)Resources.Load("Textures/Grass (Rock)");
_terrain_texture[2].tileSize = new Vector2(15, 15);
_terrain_texture[3] = new SplatPrototype();
_terrain_texture[3].texture = (Texture2D)Resources.Load("Textures/Cliff (Grassy)");
_terrain_texture[3].tileSize = new Vector2(15, 15);
_terrain_texture[4] = new SplatPrototype();
_terrain_texture[4].texture = (Texture2D)Resources.Load("Textures/Cliff (Layered Rock Grass)");
_terrain_texture[4].tileSize = new Vector2(25, 25);
_terrain_texture[5] = new SplatPrototype();
_terrain_texture[5].texture = (Texture2D)Resources.Load("Textures/Sand (Beach)");
_terrain_texture[5].tileSize = new Vector2(15, 15);
_terrain_data.splatPrototypes = _terrain_texture;
// Splatmap data is stored internally as a 3d array of floats, so declare a new empty array ready for your custom splatmap data:
float[,,] splatmapData = new float[_terrain_data.alphamapWidth, _terrain_data.alphamapHeight, _terrain_data.alphamapLayers];
//float _max_debug_value =0;
for (int y = 0; y < _terrain_data.alphamapHeight; y++)
{
for (int x = 0; x < _terrain_data.alphamapWidth; x++)
{
// Normalise x/y coordinates to range 0-1
float y_01 = (float)y / (float)_terrain_data.alphamapHeight;
float x_01 = (float)x / (float)_terrain_data.alphamapWidth;
// Sample the height at this location (note GetHeight expects int coordinates corresponding to locations in the heightmap array)
//float _height = _terrain_data.GetInterpolatedHeight(y_01,x_01);
// Calculate the normal of the terrain (note this is in normalised coordinates relative to the overall terrain dimensions)
Vector3 _normal = _terrain_data.GetInterpolatedNormal(y_01, x_01);
// Calculate the angle deviation of the terrain (normal 0)
float _angle = Mathf.Abs(Vector3.Angle(_normal, Vector3.up));
//float _angle_multiplier = Mathf.Clamp01( _angle / 90 );
// Calculate the steepness of the terrain
float _steepness = _terrain_data.GetSteepness(y_01, x_01);
//float _waterlevel = 10;
// Setup an array to record the mix of texture weights at this point
float[] splatWeights = new float[_terrain_data.alphamapLayers];
// CHANGE THE RULES BELOW TO SET THE WEIGHTS OF EACH TEXTURE ON WHATEVER RULES YOU WANT
// BASIC FOREST - Texture[0] has constant influence
splatWeights[0] = 0.5f;
// GRASS MEADOWS - Texture[1] stronger on flatter terrain
splatWeights[1] = 1f - Mathf.Clamp01(_steepness * _steepness / (_terrain_data.heightmapHeight / 5.0f));
// BASIC CORRECTION - reduce the Texture[0] according to the MEADOW value
//splatWeights[0] = Mathf.Clamp01( splatWeights[0] - ( splatWeights[1] / 2 ) );
// MEADOW CORRECTION - splatWeights[1] will be also required on flatt hills
//splatWeights[1] = ( splatWeights[1] > Mathf.Clamp01( ( _steepness * Mathf.Clamp01(-_normal.z) ) - _height ) ? splatWeights[1] : Mathf.Clamp01( ( _steepness * Mathf.Clamp01(-_normal.z) ) - _height ) );
// BOULDERS - Texture[2] will be required only on flat hillslopes
splatWeights[2] = MathTools.NormalizeRange(_angle, 4, 18, 6); //* ( _normal.z > 0 ? 1f : 0f );
splatWeights[3] = MathTools.NormalizeRange(_angle, 10, 45, 6) * Mathf.Clamp01(_normal.z * ((90 - _angle) * 0.1f)); // ( _normal.z > 0 ? 1f : 0f );// Mathf.Clamp01( ( _steepness * Mathf.Clamp01(_normal.z) ) - ( _height * _height) );//Mathf.Clamp01( Mathf.Clamp01( _normal.z * _normal.z ) );//1.0f - Mathf.Clamp01(steepness*steepness/(_terrain_data.heightmapHeight/5.0f));
splatWeights[1] = Mathf.Clamp01(splatWeights[1] - (splatWeights[3] * splatWeights[3]));
// ROCK - Texture[4] will be required on cliffy surfaces over 35 degrees
splatWeights[4] = MathTools.NormalizeRange(_angle, 35, 90, 10); // ( _normal.z > 0 ? 1f : 0f );// Mathf.Clamp01( ( _steepness * Mathf.Clamp01(_normal.z) ) - ( _height * _height) );//Mathf.Clamp01( Mathf.Clamp01( _normal.z * _normal.z ) );//1.0f - Mathf.Clamp01(steepness*steepness/(_terrain_data.heightmapHeight/5.0f));
splatWeights[2] = (splatWeights[2] == 0 ? MathTools.NormalizeRange(_angle, 30, 45, 5) : splatWeights[2]);
//if( _height > _max_debug_value )
// _max_debug_value = _height;
float _sum = splatWeights.Sum();
// Loop through each terrain texture
for (int _i = 0; _i < _terrain_data.alphamapLayers; _i++)
{
// Normalize so that sum of all texture weights = 1
splatWeights[_i] /= _sum;
// Assign this point to the splatmap array
splatmapData[x, y, _i] = splatWeights[_i];
}
}
}
//Debug.Log( _max_debug_value );
// Finally assign the new splatmap to the terrainData:
_terrain_data.SetAlphamaps(0, 0, splatmapData);
}
