// populate the planet
protected void Initialize(float elevationScale, GameObject[] templates, int numObjects, int randomSeed, bool favorHigherElevations, float minScale, float maxScale)
{
Debug.Log("Placing " + numObjects + " objects under " + transform.name + " with using a random seed of " + randomSeed + "...");
// remove all of the current objects
Tools.DestroyChildrenOf(gameObject);
// if we don't want to place anything then stop here now
if (numObjects == 0)
{
return;
}
// reset random number generator to a deterministic value (so objects are always in the same place for each planet)
Random.InitState(randomSeed);
// get the number of template objects we have to clone from
var numTemplateObjects = templates.Length;
// calculate the minimum elevation we'd like to place objects at
var minimumElevation = (m_planetGenerator.m_maximumElevation - m_planetGenerator.m_waterElevation) * 0.05f + m_planetGenerator.m_waterElevation;
// we'll keep track of the surface normal and position for this object
var normal = Vector3.zero;
var position = Vector3.zero;
// start placing objects
for (var i = 0; i < numObjects; i++)
{
// grab the template for the next object
var template = templates[i % numTemplateObjects];
// we'll figure out what values to use for these in the loop
var mapX = 0.0f;
var mapY = 0.0f;
var elevation = 0.0f;
// maximum of 10 tries to put this object somewhere decent
var spotFound = false;
for (var j = 0; j < 10; j++)
{
// pick a random place on the planet surface
mapX = Random.Range(0.0f, m_planetGenerator.m_textureMapWidth);
mapY = Random.Range(m_planetGenerator.m_textureMapHeight * 0.125f, m_planetGenerator.m_textureMapHeight * 0.875f);
// Debug.Log( "Object #" + ( i + 1 ) + ", trying mapX=" + mapX + ", mapY=" + mapY + "..." );
// get the surface normal
normal = m_planetGenerator.GetBilinearSmoothedNormal(mapX, mapY, elevationScale * 0.125f);
// is the surface steep (more that 45 degree slope)?
if (normal.y < 0.707f)
{
// Debug.Log( "...too steep!" );
// yes - let's not put it here
continue;
}
// get the elevation
elevation = m_planetGenerator.GetBilinearSmoothedElevation(mapX, mapY);
// is the elevation is below the minimum elevation
if (elevation < minimumElevation)
{
// Debug.Log( "...below minimum elevation!" );
// yes - let's not put it here
continue;
}
// pick a random elevation somewhere between the minimum and the maximum elevation
var randomElevation = Random.Range(minimumElevation, m_planetGenerator.m_maximumElevation);
// do we want to favor the higher elevations?
if (favorHigherElevations)
{
// yes - are we below the random elevation?
if (elevation <= randomElevation)
{
// Debug.Log( "...below random elevation!" );
// yes - let's not put it here
continue;
}
}
else
{
// no - are we above the random elevation?
if (elevation >= randomElevation)
{
// Debug.Log( "...above random elevation!" );
// yes - let's not put it here
continue;
}
}
// calculate the position of this object in world coordinates
position = Tools.MapToWorldCoordinates(mapX, mapY, m_planetGenerator.m_textureMapWidth, m_planetGenerator.m_textureMapHeight);
position.y = elevation * elevationScale;
// check if this object is too close to another object we've already placed
if (OverlapsSomething(position))
{
// Debug.Log( "...overlaps another object!" );
// nope - let's not put it here
continue;
}
// yay! let's put it here
spotFound = true;
break;
}
// did we find a good spot to put this object?
if (!spotFound)
{
// no - ok let's skip this one
continue;
}
// give the object a random rotation and align it with the surface normal
var rotation = Quaternion.FromToRotation(Vector3.up, normal) * Quaternion.Euler(0.0f, Random.Range(0.0f, 360.0f), 0.0f) * template.transform.localRotation;
// tell unity to clone an object from the selected template with the position and rotation we want it to have
var clonedObject = Instantiate(template, position, rotation, transform);
clonedObject.name = "Clone #" + (i + 1) + " (from " + template.name + ")";
// give the cloned object a random scale
clonedObject.transform.localScale = Vector3.one * Random.Range(minScale, maxScale);
// add object to the spawn list
AddToSpawnList(position);
}
}