/// <summary>
/// Deforms the terrain in a spherical region around the point
/// </summary>
/// <param name="point">The point to modify the terrain around</param>
/// <param name="addTerrain">Should terrain be added or removed</param>
/// <param name="deformSpeed">How fast the terrain should be deformed</param>
/// <param name="range">How far the deformation can reach</param>
private void EditTerrain(Vector3 point, bool addTerrain, float deformSpeed, float range)
{
int buildModifier = addTerrain ? 1 : -1;
int hitX = Mathf.RoundToInt(point.x);
int hitY = Mathf.RoundToInt(point.y);
int hitZ = Mathf.RoundToInt(point.z);
int intRange = Mathf.CeilToInt(range);
for (int x = -intRange; x <= intRange; x++)
{
for (int y = -intRange; y <= intRange; y++)
{
for (int z = -intRange; z <= intRange; z++)
{
int offsetX = hitX - x;
int offsetY = hitY - y;
int offsetZ = hitZ - z;
int3 offsetPoint = new int3(offsetX, offsetY, offsetZ);
float distance = math.distance(offsetPoint, point);
if (distance > range)
{
continue;
}
float modificationAmount = deformSpeed / distance * buildModifier;
if (voxelDataStore.TryGetVoxelData(offsetPoint, out float oldVoxelData))
{
float newVoxelData = oldVoxelData - modificationAmount;
voxelDataStore.SetVoxelData(newVoxelData, offsetPoint);
}
}
}
}
}
/// <summary>
/// Get a point on the flattening plane and flatten the terrain around it
/// </summary>
private void FlattenTerrain()
{
PlaneLineIntersectionResult result = IntersectionUtilities.PlaneLineIntersection(_flatteningOrigin, _flatteningNormal, playerCamera.position, playerCamera.forward, out float3 intersectionPoint);
if (result != PlaneLineIntersectionResult.OneHit)
{
return;
}
int intRange = (int)math.ceil(deformRange);
for (int x = -intRange; x <= intRange; x++)
{
for (int y = -intRange; y <= intRange; y++)
{
for (int z = -intRange; z <= intRange; z++)
{
int3 localPosition = new int3(x, y, z);
float3 offsetPoint = intersectionPoint + localPosition;
float distance = math.distance(offsetPoint, intersectionPoint);
if (distance > deformRange)
{
continue;
}
int3 voxelDataWorldPosition = (int3)offsetPoint;
if (voxelDataStore.TryGetVoxelData(voxelDataWorldPosition, out float oldVoxelData))
{
float voxelDataChange = (math.dot(_flatteningNormal, voxelDataWorldPosition) - math.dot(_flatteningNormal, _flatteningOrigin)) / deformRange;
voxelDataStore.SetVoxelData((voxelDataChange * 0.5f + oldVoxelData) * 0.8f, voxelDataWorldPosition);
}
}
}
}
}