Vector3 GetValidMovePosition(Vector3 currentTarget)
{
var dir = (currentTarget - myHero.Position);
dir.Normalize();
// try to walk further if position is not valid
foreach (var possibleTarget in GetPositionsWithDistanceAndAngle(currentTarget, dir, pathfinding.CellSize, 4))
{
var flags = pathfinding.GetCellFlags(possibleTarget);
if (IsWalkableCell(flags))
{
return(possibleTarget);
}
}
// no valid position found for our old movement target, so try to find a new one
foreach (var possibleTarget in GetPositionsWithDistanceAndAngle(GetValidMovePosition(), dir, pathfinding.CellSize, 4))
{
var flags = pathfinding.GetCellFlags(possibleTarget);
if (IsWalkableCell(flags))
{
return(possibleTarget);
}
}
// well no luck?
Debugging.WriteLine("Couldn't find a valid target position which is safe :(");
return(GetValidMovePosition());
}
/// <summary>
/// The get valid move position.
/// </summary>
/// <param name="currentTarget">
/// The current target.
/// </param>
/// <param name="unit">
/// The unit.
/// </param>
/// <param name="pathfinding">
/// The pathfinding.
/// </param>
/// <returns>
/// The <see cref="Vector3" />.
/// </returns>
public static Vector3 GetValidMovePosition(
Vector3 currentTarget,
IAbilityUnit unit,
NavMeshPathfinding pathfinding)
{
var dir = currentTarget - unit.SourceUnit.Position;
dir.Normalize();
// try to walk further if position is not valid
foreach (var possibleTarget in GetPositionsWithDistanceAndAngle(currentTarget, dir, pathfinding.CellSize, 4)
)
{
var flags = pathfinding.GetCellFlags(possibleTarget);
if (IsWalkableCell(flags))
{
return(possibleTarget);
}
}
// var perpendicular = dir.Perpendicular();
// perpendicular.Normalize();
// var newTarget = unit.SourceUnit.Position + (perpendicular * 50);
// foreach (var possibleTarget in GetPositionsWithDistanceAndAngle(newTarget, perpendicular, pathfinding.CellSize, 4))
// {
// var flags = pathfinding.GetCellFlags(possibleTarget);
// if (IsWalkableCell(flags))
// {
// return possibleTarget;
// }
// }
// newTarget = unit.SourceUnit.Position + (perpendicular * -50);
// foreach (var possibleTarget in GetPositionsWithDistanceAndAngle(newTarget, perpendicular, pathfinding.CellSize, 4))
// {
// var flags = pathfinding.GetCellFlags(possibleTarget);
// if (IsWalkableCell(flags))
// {
// return possibleTarget;
// }
// }
var newTarget = unit.SourceUnit.Position + dir * -50;
// no valid position found for our old movement target, so try to find a new one
foreach (var possibleTarget in GetPositionsWithDistanceAndAngle(newTarget, dir, pathfinding.CellSize, 4))
{
var flags = pathfinding.GetCellFlags(possibleTarget);
if (IsWalkableCell(flags))
{
return(possibleTarget);
}
}
// well no luck?
return(newTarget);
}
public static Vector3 ExtendUntilWall(
Vector3 start,
Vector3 direction,
float distance,
NavMeshPathfinding pathFinder)
{
var step = pathFinder.CellSize / 2f;
var testPoint = start;
var sign = distance > 0f ? 1f : -1f;
distance = Math.Abs(distance);
while (pathFinder.GetCellFlags(testPoint).HasFlag(NavMeshCellFlags.Walkable) && distance > 0f)
{
if (step > distance)
{
step = distance;
}
testPoint = testPoint + sign * direction * step;
distance -= step;
}
return(testPoint);
}
