override public bool FindRayIntersection(Ray3f ray, out SORayHit hit)
{
hit = null;
Ray sceneRay = GetScene().ToSceneRay(ray);
Frame3f frameL = GetLocalFrame(CoordSpace.ObjectCoords);
Ray localRay = frameL.ToFrame(sceneRay);
float sceneWidth = GetScene().ToSceneDimension(visibleWidth);
AxisAlignedBox3d hitBox = localBounds;
hitBox.Expand(sceneWidth * 0.5f);
Bounds hitBounds = new Bounds((Vector3)hitBox.Center, (Vector3)hitBox.Diagonal);
if (hitBounds.IntersectRay(localRay) == false)
{
return(false);
}
double rayHitT;
if (CurveUtils.FindClosestRayIntersection(curve, sceneWidth * 0.5f, localRay, out rayHitT))
{
hit = new SORayHit();
hit.fHitDist = (float)rayHitT;
hit.hitPos = localRay.GetPoint(hit.fHitDist);
hit.hitPos = GetScene().ToWorldP(frameL.FromFrameP(hit.hitPos));
hit.hitNormal = Vector3.zero;
hit.hitGO = root;
hit.hitSO = this;
return(true);
}
return(false);
}
override public bool FindRayIntersection(Ray3f worldRay, out SORayHit hit)
{
hit = null;
// project world ray into local coords
FScene scene = GetScene();
Ray3f sceneRay = scene.ToSceneRay(worldRay);
Ray3f localRay = SceneTransforms.SceneToObject(this, sceneRay);
// also need width in local coords
float sceneWidth = scene.ToSceneDimension(visibleWidth);
float localWidth = SceneTransforms.SceneToObject(this, sceneWidth) * HitWidthMultiplier;
// bounding-box hit test (would be nice to do w/o object allocation...)
AxisAlignedBox3d hitBox = localBounds;
hitBox.Expand(localWidth);
IntrRay3AxisAlignedBox3 box_test = new IntrRay3AxisAlignedBox3(localRay, hitBox);
if (box_test.Find() == false)
{
return(false);
}
// raycast against curve (todo: spatial data structure for this? like 2D polycurve bbox tree?)
double rayHitT;
if (CurveUtils.FindClosestRayIntersection(curve, localWidth, localRay, out rayHitT))
{
hit = new SORayHit();
// transform local hit point back into world coords
Vector3f rayPos = localRay.PointAt((float)rayHitT);
Vector3f scenePos = SceneTransforms.ObjectToSceneP(this, rayPos);
hit.hitPos = SceneTransforms.SceneToWorldP(scene, scenePos);
hit.fHitDist = worldRay.Project(hit.hitPos);
hit.hitNormal = Vector3f.Zero;
hit.hitGO = root;
hit.hitSO = this;
return(true);
}
return(false);
}
