public ImpactType GetImpactType(World world, CPos cell, WPos pos, Actor firedBy)
{
// Missiles need a margin because they sometimes explode a little above ground
// due to their explosion check triggering slightly too early (because of CloseEnough).
// TODO: Base ImpactType on target altitude instead of explosion altitude.
var airMargin = new WDist(128);
// Matching target actor
if (ValidImpactTypes.HasFlag(ImpactType.TargetHit) && GetDirectHit(world, cell, pos, firedBy, true))
{
return(ImpactType.TargetHit);
}
var dat = world.Map.DistanceAboveTerrain(pos);
var isDirectHit = GetDirectHit(world, cell, pos, firedBy);
if (dat.Length > airMargin.Length)
{
return(isDirectHit ? ImpactType.AirHit : ImpactType.Air);
}
if (dat.Length <= airMargin.Length && world.Map.GetTerrainInfo(cell).IsWater)
{
return(isDirectHit ? ImpactType.WaterHit : ImpactType.Water);
}
if (isDirectHit)
{
return(ImpactType.GroundHit);
}
// Matching target terrain
if (ValidImpactTypes.HasFlag(ImpactType.TargetTerrain) &&
IsValidTarget(world.Map.GetTerrainInfo(cell).TargetTypes))
{
return(ImpactType.TargetTerrain);
}
return(ImpactType.Ground);
}
public bool IsValidImpact(WPos pos, Actor firedBy)
{
var world = firedBy.World;
var targetTile = world.Map.CellContaining(pos);
if (!world.Map.Contains(targetTile))
{
return(false);
}
var impactType = GetImpactType(world, targetTile, pos);
if (!ValidImpactTypes.HasFlag(impactType) || InvalidImpactTypes.HasFlag(impactType))
{
return(false);
}
return(true);
}
