/// <summary>
/// check visibility between two points (in sim units)
/// </summary>
/// <returns>a physics body that was between the points (or null)</returns>
public static Body CheckVisibility(Vector2 rayStart, Vector2 rayEnd, bool ignoreLevel = false, bool ignoreSubs = false, bool ignoreSensors = true)
{
Body closestBody = null;
float closestFraction = 1.0f;
Vector2 closestNormal = Vector2.Zero;
if (Vector2.Distance(rayStart, rayEnd) < 0.01f)
{
lastPickedPosition = rayEnd;
return(null);
}
GameMain.World.RayCast((fixture, point, normal, fraction) =>
{
if (fixture == null ||
(ignoreSensors && fixture.IsSensor) ||
(!fixture.CollisionCategories.HasFlag(Physics.CollisionWall) && !fixture.CollisionCategories.HasFlag(Physics.CollisionLevel)))
{
return(-1);
}
if (ignoreLevel && fixture.CollisionCategories == Physics.CollisionLevel)
{
return(-1);
}
if (ignoreSubs && fixture.Body.UserData is Submarine)
{
return(-1);
}
Structure structure = fixture.Body.UserData as Structure;
if (structure != null)
{
if (structure.IsPlatform || structure.StairDirection != Direction.None)
{
return(-1);
}
int sectionIndex = structure.FindSectionIndex(ConvertUnits.ToDisplayUnits(point));
if (sectionIndex > -1 && structure.SectionBodyDisabled(sectionIndex))
{
return(-1);
}
}
if (fraction < closestFraction)
{
closestBody = fixture.Body;
closestFraction = fraction;
closestNormal = normal;
}
return(closestFraction);
}
, rayStart, rayEnd);
lastPickedPosition = rayStart + (rayEnd - rayStart) * closestFraction;
lastPickedFraction = closestFraction;
lastPickedNormal = closestNormal;
return(closestBody);
}
private void GetTargetEntity()
{
targetEntity = null;
if (Character.AnimController.CurrentHull != null)
{
wallAttackPos = Vector2.Zero;
return;
}
//check if there's a wall between the target and the Character
Vector2 rayStart = Character.SimPosition;
Vector2 rayEnd = selectedAiTarget.SimPosition;
if (selectedAiTarget.Entity.Submarine != null && Character.Submarine == null)
{
rayStart -= ConvertUnits.ToSimUnits(selectedAiTarget.Entity.Submarine.Position);
}
Body closestBody = Submarine.CheckVisibility(rayStart, rayEnd);
if (Submarine.LastPickedFraction == 1.0f || closestBody == null)
{
wallAttackPos = Vector2.Zero;
return;
}
Structure wall = closestBody.UserData as Structure;
if (wall == null)
{
wallAttackPos = Submarine.LastPickedPosition;
if (selectedAiTarget.Entity.Submarine != null && Character.Submarine == null)
{
wallAttackPos -= ConvertUnits.ToSimUnits(selectedAiTarget.Entity.Submarine.Position);
}
}
else
{
int sectionIndex = wall.FindSectionIndex(ConvertUnits.ToDisplayUnits(Submarine.LastPickedPosition));
float sectionDamage = wall.SectionDamage(sectionIndex);
for (int i = sectionIndex - 2; i <= sectionIndex + 2; i++)
{
if (wall.SectionBodyDisabled(i))
{
sectionIndex = i;
break;
}
if (wall.SectionDamage(i) > sectionDamage)
{
sectionIndex = i;
}
}
wallAttackPos = wall.SectionPosition(sectionIndex);
//if (wall.Submarine != null) wallAttackPos += wall.Submarine.Position;
wallAttackPos = ConvertUnits.ToSimUnits(wallAttackPos);
}
targetEntity = closestBody.UserData as IDamageable;
}