/// <summary>
/// Initialise the extension
/// </summary>
public override void Initialise()
{
m_textureHM = new UnityHeightMap(m_grassMask);
if (m_normaliseMask && m_textureHM.HasData())
{
m_textureHM.Normalise();
}
if (m_invertMask && m_textureHM.HasData())
{
m_textureHM.Invert();
}
if (m_flipMask && m_textureHM.HasData())
{
m_textureHM.Flip();
}
}
/// <summary>
/// Called after the spawn is complete
/// </summary>
/// <param name="spawnRule">The rule that generated this call</param>
/// <param name="spawnInfo">The spawninfo structure for this call</param>
public override void PostSpawn(SpawnRule spawnRule, ref SpawnInfo spawnInfo)
{
//See if we can load the texture
if (m_textureHM == null || !m_textureHM.HasData())
{
return;
}
//Get the terrain
Terrain t = Gaia.TerrainHelper.GetTerrain(spawnInfo.m_hitLocationWU);
if (t == null)
{
return;
}
//Get the cached detail maps
List <HeightMap> detailMaps = spawnInfo.m_spawner.GetDetailMaps(spawnInfo.m_hitTerrain.GetInstanceID());
if (detailMaps == null || m_grassIndex >= detailMaps.Count)
{
return;
}
//Make some speedy calculations
float widthWU = spawnInfo.m_hitTerrain.terrainData.size.x;
float depthWU = spawnInfo.m_hitTerrain.terrainData.size.z;
float radiusWU = spawnRule.GetMaxScaledRadius(ref spawnInfo) * m_scaleMask;
float xStartWU = spawnInfo.m_hitLocationWU.x - (radiusWU / 2f);
float zStartWU = spawnInfo.m_hitLocationWU.z - (radiusWU / 2f);
float xEndWU = xStartWU + radiusWU;
float zEndWU = zStartWU + radiusWU;
float stepWU = 0.5f;
Vector3 locationWU = Vector3.zero;
float xRotNU = 0f, zRotNU = 0f;
float grassRange = (float)(m_maxGrassStrength - m_minGrassStrenth);
for (float x = xStartWU; x < xEndWU; x += stepWU)
{
for (float z = zStartWU; z < zEndWU; z += stepWU)
{
//Need to rotate x,z around the pivot by the rotation angle
locationWU = new Vector3(x, spawnInfo.m_hitLocationWU.y, z);
locationWU = Gaia.Utils.RotatePointAroundPivot(locationWU, spawnInfo.m_hitLocationWU, new Vector3(0f, spawnInfo.m_spawnRotationY, 0f));
//Now normalise the result
xRotNU = (locationWU.x / widthWU) + 0.5f;
zRotNU = (locationWU.z / depthWU) + 0.5f;
//Drop out if out of bounds
if (xRotNU < 0f || xRotNU >= 1f || zRotNU < 0f || zRotNU > 1f)
{
continue;
}
detailMaps[m_grassIndex][zRotNU, xRotNU] = Mathf.Clamp((m_textureHM[(x - xStartWU) / radiusWU, (z - zStartWU) / radiusWU] * grassRange) + m_minGrassStrenth, 0f, 15f);
}
}
}
/// <summary>
/// Call this to get the degree of completion in range 0..1.
/// </summary>
/// <param name="spawner">The spawner this is for</param>
/// <param name="objSpawned">The object that was spawned in the spawn step (if relevant)</param>
/// <returns>Return the completion in range of 0 (not started) .. 1 (completed)</returns>
public override void PostSpawn(SpawnRule spawnRule, ref SpawnInfo spawnInfo)
{
//See if we can load the texture
if (m_textureHM == null || !m_textureHM.HasData())
{
return;
}
//Get the terrain
Terrain t = Gaia.TerrainHelper.GetTerrain(spawnInfo.m_hitLocationWU);
if (t == null)
{
return;
}
//Get the cached texture maps
List <HeightMap> txtMaps = spawnInfo.m_spawner.GetTextureMaps(spawnInfo.m_hitTerrain.GetInstanceID());
if (txtMaps == null || m_textureIndex >= txtMaps.Count)
{
return;
}
//Make some speedy calculations
float widthWU = spawnInfo.m_hitTerrain.terrainData.size.x;
float depthWU = spawnInfo.m_hitTerrain.terrainData.size.z;
float radiusWU = spawnRule.GetMaxScaledRadius(ref spawnInfo) * m_scaleMask;
float xStartWU = spawnInfo.m_hitLocationWU.x - (radiusWU / 2f);
float zStartWU = spawnInfo.m_hitLocationWU.z - (radiusWU / 2f);
float xEndWU = xStartWU + radiusWU;
float zEndWU = zStartWU + radiusWU;
float stepWU = 0.5f;
Vector3 locationWU = Vector3.zero;
float xRotNU = 0f, zRotNU = 0f;
float currStrength = 0f, newStrength = 1f;
for (float x = xStartWU; x < xEndWU; x += stepWU)
{
for (float z = zStartWU; z < zEndWU; z += stepWU)
{
//Need to rotate x,z around the pivot by the rotation angle
locationWU = new Vector3(x, spawnInfo.m_hitLocationWU.y, z);
locationWU = Gaia.GaiaUtils.RotatePointAroundPivot(locationWU, spawnInfo.m_hitLocationWU, new Vector3(0f, spawnInfo.m_spawnRotationY, 0f));
//Now normalise the result
xRotNU = (locationWU.x / widthWU) + 0.5f;
zRotNU = (locationWU.z / depthWU) + 0.5f;
//Drop out if out of bounds
if (xRotNU < 0f || xRotNU >= 1f || zRotNU < 0f || zRotNU > 1f)
{
continue;
}
//Only interested in increasing values
currStrength = txtMaps[m_textureIndex][zRotNU, xRotNU];
newStrength = m_textureHM[(x - xStartWU) / radiusWU, (z - zStartWU) / radiusWU];
if (newStrength > currStrength)
{
float delta = newStrength - currStrength;
float theRest = 1f - currStrength;
float adjustment = 0f;
if (theRest != 0f)
{
adjustment = 1f - (delta / theRest);
}
for (int idx = 0; idx < txtMaps.Count; idx++)
{
if (idx == m_textureIndex)
{
txtMaps[idx][zRotNU, xRotNU] = newStrength;
}
else
{
txtMaps[idx][zRotNU, xRotNU] *= adjustment;
}
}
}
}
}
spawnInfo.m_spawner.SetTextureMapsDirty();
}