/// <summary>
/// Intersect a segment with the world. If non-zero the predicate
/// allows certain skins to be excluded
/// </summary>
/// <param name="seg"></param>
/// <param name="collisionPredicate"></param>
/// <returns></returns>
public abstract bool SegmentIntersect(out float fracOut, out CollisionSkin skinOut, out Vector3 posOut, out Vector3 normalOut,
Segment seg, CollisionSkinPredicate1 collisionPredicate);
public override bool SegmentIntersect(out float fracOut,out CollisionSkin skinOut,out Vector3 posOut,out Vector3 normalOut, Segment seg, CollisionSkinPredicate1 collisionPredicate)
{
int numSkins = skins.Count;
BoundingBox segBox = BoundingBoxHelper.InitialBox;
BoundingBoxHelper.AddSegment(seg, ref segBox);
//initialise the outputs
fracOut = float.MaxValue;
skinOut = null;
posOut = normalOut = Vector3.Zero;
// working vars
float frac;
Vector3 pos;
Vector3 normal;
for (int iskin = 0; iskin < numSkins; ++iskin)
{
CollisionSkin skin = skins[iskin];
if ((collisionPredicate == null) ||
collisionPredicate.ConsiderSkin(skin))
{
// basic bbox test
if (BoundingBoxHelper.OverlapTest(ref skin.WorldBoundingBox, ref segBox))
{
if (skin.SegmentIntersect(out frac, out pos, out normal, seg))
{
if (frac < fracOut)
{
posOut = pos;
normalOut = normal;
skinOut = skin;
fracOut = frac;
}
}
}
}
}
if (fracOut > 1.0f) return false;
fracOut = MathHelper.Clamp(fracOut, 0.0f, 1.0f);
return true;
}
