public bool Intersect(Ray ray, out HitData hitData)
{
// Outsource this into the scene to enable accelerating data structures.
Ray offsettedRay = new Ray(ray.Start - Position, ray.Direction);
HitData closestHit = HitData.NoHit;
HitData lastHit;
triangles.ForEach((IIntersectable) =>
{
if (IIntersectable.Intersect(offsettedRay, out lastHit))
{
HitData offsettedHit = new HitData(lastHit.Position + Position, lastHit.Normal, lastHit.TextureCoords, lastHit.Material);
if (!closestHit.exists() && lastHit.exists())
{
closestHit = offsettedHit;
return;
}
if (offsettedRay.Start.Distance(offsettedHit.Position) < offsettedRay.Start.Distance(closestHit.Position))
{
closestHit = offsettedHit;
}
}
});
hitData = closestHit;
return(hitData.exists());
}
/// <summary>
/// Intersect a ray with scene objects. Writes out hit data.
/// </summary>
/// <param name="ray">The ray that will be intersected with the scene.</param>
/// <param name="hitData">The hit data of the closest hit that will be written out if there is an intersection.
/// Will output HitData.NoHit otherwise and can be checked with the exists() method on the object.</param>
/// <returns>Returns true, if there is an intersection with at least one scene object, false otherwise.</returns>
public bool Intersect(Ray ray, out HitData hitData, bool isShadowRay = false)
{
// TODO: Use acceleration Data structures
HitData closestHit = HitData.NoHit;
HitData lastHit;
ObjectList.ForEach((IIntersectable) =>
{
if (isShadowRay && IIntersectable.CastShadows == false)
{
return;
}
if (IIntersectable.Intersect(ray, out lastHit))
{
if (!closestHit.exists() && lastHit.exists())
{
closestHit = lastHit;
return;
}
if (ray.Start.Distance(lastHit.Position) < ray.Start.Distance(closestHit.Position))
{
closestHit = lastHit;
}
}
});
hitData = closestHit;
return(hitData.exists());
}
