/// <summary>
/// Calculates the smallest Y/Z position based on the raycast hit and brushsettings
/// </summary>
/// <param name="hit">Raycast hit position</param>
/// <param name="brush">The brush used</param>
int CalculateYbase(Vector3 hit, TerrainBrush brush)
{
// get position of the hit as percentile of the terrain Y axis
float tempYCoord = (hit - m_Terrain.gameObject.transform.position).z / m_Terrain.terrainData.size.z;
// get the position of the terrain heightmap where the hit is
int posYInTerrain = (int)(tempYCoord * m_HmHeight);
int posYrest = 0;
bool posYoverflow = false;
if (posYInTerrain + m_Brush.m_BrushHeight / 2 > m_HmHeight)
{
posYrest = (posYInTerrain + m_Brush.m_BrushHeight / 2) % m_HmHeight;
posYoverflow = true;
}
else if (posYInTerrain - m_Brush.m_BrushHeight / 2 < 0)
{
posYrest = (posYInTerrain - m_Brush.m_BrushHeight / 2) % m_HmHeight;
}
brush.m_BrushHeight = Mathf.Abs(m_ModificationDiameter - Mathf.Abs(posYrest));
int offsetY = brush.m_BrushHeight / 2;
return(Mathf.Clamp(posYoverflow ? posYInTerrain + offsetY : posYInTerrain - offsetY, 0, m_HmHeight - brush.m_BrushHeight));
}
/// <summary>
/// Calculates the smallest X position based on the raycast hit and brushsettings
/// </summary>
/// <param name="hit">Raycast hit position</param>
/// <param name="brush">The brush used</param>
/// <returns></returns>
int CalculateXbase(Vector3 hit, TerrainBrush brush)
{
// get position of the hit as percentile of the terrain X axis
float tempXCoord = (hit - m_Terrain.gameObject.transform.position).x / m_Terrain.terrainData.size.x;
// get the position of the terrain heightmap where the hit is
int posXInTerrain = (int)(tempXCoord * m_HmWidth);
int posXrest = 0;
bool posXoverflow = false;
if (posXInTerrain + m_Brush.m_BrushWidth / 2 > m_HmWidth)
{
posXrest = (posXInTerrain + m_Brush.m_BrushWidth / 2) % m_HmWidth;
posXoverflow = true;
}
else if (posXInTerrain - m_Brush.m_BrushWidth / 2 < 0)
{
posXrest = (posXInTerrain - m_Brush.m_BrushWidth / 2) % m_HmWidth;
}
brush.m_BrushWidth = Mathf.Abs(m_ModificationDiameter - Mathf.Abs(posXrest));
int offsetX = brush.m_BrushWidth / 2;
return(Mathf.Clamp(posXoverflow ? posXInTerrain + offsetX : posXInTerrain - offsetX, 0, m_HmWidth - brush.m_BrushWidth));
}
/// <summary>
/// Initialize the variables
/// </summary>
private void Awake()
{
m_Terrain = Terrain.activeTerrain;
m_HmWidth = m_Terrain.terrainData.heightmapWidth;
m_HmHeight = m_Terrain.terrainData.heightmapHeight;
m_AssignSplatMap = GetComponent <AssignSplatMap>();
m_OldTerrainData = m_Terrain.terrainData.GetHeights(0, 0, m_HmWidth, m_HmHeight);
m_Brush = new TerrainBrush(m_MinHeight, m_MaxHeight);
m_TerrainWater = transform.parent.Find("Terrain").Find("Water").GetComponent <Water>();
}