/// <summary>
/// Perform a raycast test and return colliding results.
/// </summary>
/// <param name="start">Start ray vector.</param>
/// <param name="end">End ray vector.</param>
/// <param name="resultsCallback">BulletSharp results callback.</param>
internal RaycastResults Raycast(Vector3 start, Vector3 end, BulletSharp.RayResultCallback resultsCallback)
{
// convert start and end vectors to bullet vectors
BulletSharp.Math.Vector3 bStart = ToBullet.Vector(start);
BulletSharp.Math.Vector3 bEnd = ToBullet.Vector(end);
// perform the ray test
return(Raycast(bStart, bEnd, resultsCallback));
}
/// <summary>
/// Perform a raycast test and return colliding results.
/// </summary>
/// <param name="start">Start ray vector.</param>
/// <param name="end">End ray vector.</param>
/// <param name="returnNearest">If true, will only return the nearest object collided.</param>
public RaycastResults Raycast(Vector3 start, Vector3 end, bool returnNearest = true)
{
// convert start and end vectors to bullet vectors
BulletSharp.Math.Vector3 bStart = ToBullet.Vector(start);
BulletSharp.Math.Vector3 bEnd = ToBullet.Vector(end);
// create class to hold results
BulletSharp.RayResultCallback resultsCallback = returnNearest ?
new BulletSharp.ClosestRayResultCallback(ref bStart, ref bEnd) as BulletSharp.RayResultCallback :
new BulletSharp.AllHitsRayResultCallback(bStart, bEnd);
// perform ray cast
return(Raycast(bStart, bEnd, resultsCallback));
}
/// <summary>
/// Perform a raycast test and return colliding results, using native bullet objects.
/// </summary>
/// <param name="bStart">Start ray vector (bullet vector).</param>
/// <param name="bEnd">End ray vector (bullet vector).</param>
/// <param name="resultsCallback">BulletSharp results callback.</param>
internal RaycastResults Raycast(BulletSharp.Math.Vector3 bStart, BulletSharp.Math.Vector3 bEnd, BulletSharp.RayResultCallback resultsCallback)
{
// perform the ray test
_world.RayTestRef(ref bStart, ref bEnd, resultsCallback);
// create results object to return
RaycastResults results = new RaycastResults();
// parse data based on type
// closest result / closest but not me types:
if (resultsCallback is BulletSharp.ClosestRayResultCallback)
{
// convert to closest results type
BulletSharp.ClosestRayResultCallback closestReults = resultsCallback as BulletSharp.ClosestRayResultCallback;
// set results data
results.HasHit = closestReults.HasHit;
if (results.HasHit)
{
results.Collisions = new RaycastResults.SingleResult[1];
results.Collisions[0].HitFraction = closestReults.ClosestHitFraction;
results.Collisions[0].CollisionNormal = ToMonoGame.Vector(closestReults.HitNormalWorld);
results.Collisions[0].CollisionPoint = ToMonoGame.Vector(closestReults.HitPointWorld);
results.Collisions[0].CollisionBody = (closestReults.CollisionObject.UserObject as BasicPhysicalBody).EcsComponent;
}
}
// all results type
else if (resultsCallback is BulletSharp.AllHitsRayResultCallback)
{
// convert to all results type
BulletSharp.AllHitsRayResultCallback allResults = resultsCallback as BulletSharp.AllHitsRayResultCallback;
// set results data
results.HasHit = allResults.HasHit;
if (results.HasHit)
{
results.Collisions = new RaycastResults.SingleResult[allResults.CollisionObjects.Count];
for (int i = 0; i < allResults.CollisionObjects.Count; ++i)
{
results.Collisions[i].HitFraction = allResults.HitFractions[i];
results.Collisions[i].CollisionNormal = ToMonoGame.Vector(allResults.HitNormalWorld[i]);
results.Collisions[i].CollisionPoint = ToMonoGame.Vector(allResults.HitPointWorld[i]);
results.Collisions[i].CollisionBody = (allResults.CollisionObjects[i].UserObject as BasicPhysicalBody).EcsComponent;
}
}
}
// finally, return parsed results
return(results);
}
