private void RenderAllAxis()
{
for (int a = 0; a < 3; a++) {
Ray ray = new Ray(new Vector3(), AxisVector[a]);
Vector3[] hits = camera.Frustum.RayIntersect(ray);
if (hits.Length >= 2) {
GLUtil.Color(AxisVector[a]);
GLUtil.Line(hits[0], hits[1]);
// Print the label on the far hit pos
Vector3 wPos = (from h in hits orderby (h - camera.Position).SqLength select h).Last();
Vector2 pos = camera.ProjectPoint(wPos);
PrintClampedCentered(pos.x, camera.Height - pos.y, AxisLabel[a], 1.2f);
}
}
// Vector2 p = camera.ProjectPoint(new Vector3());
// PrintClampedCentered(p.x,camera.Height - p.y, "o", 0.8f);
// PrintClampedCentered(lastMousePos.X, camera.Height - lastMousePos.Y, "mp", 0.8f);
}
public static Intersection GetPrimitiveOnRay(Ray ray, Vector3 relViewPos, IEnumerable<IEditorPrimitive> primitives)
{
var items = RayPrimitivesIntersect(ray, relViewPos, primitives);
Intersection[] isect = new Intersection[(int)PrimitiveType.MaxTypes];
foreach (var i in items) {
//float dist = i.point.DistanceTo(camera.Position);
float dist = ray.DistanceToPoint(i.point);
float f = i.primitive.GetSelectFactor(ray.start, ray.dir, i.point);
int sp = (int)i.primitive.PrimitiveType;
if (isect [sp].primitive == null || f < i.primitive.GetSelectFactor (ray.start, ray.dir, isect[sp].point))
isect[sp] = i;
}
return isect.FirstOrDefault(i => i.primitive != null);
}
/// <summary>
/// Tests all primitives against the given ray for intersections.
/// All intersections that come within range are returned
/// </summary>
public static Intersection[] RayPrimitivesIntersect(Ray ray, Vector3 camPos, IEnumerable<IEditorPrimitive> primitives)
{
List<Intersection> intersections = new List<Intersection>();
foreach (var i in primitives) {
Vector3 hitPos, hitNormal;
if (i.RayIntersect(ray, camPos, 0.008f, out hitPos, out hitNormal)) {
Intersection inters = new Intersection();
inters.primitive = i;
inters.point = hitPos;
intersections.Add(inters);
}
}
return intersections.ToArray();
}
public Vector3[] RayIntersect(Ray ray)
{
List<Vector3> hits = new List<Vector3>();
foreach (Plane pl in planes) {
Vector3 hp;
if (ray.IntersectPlane(pl, out hp)) {
// See if the hitpoint is actually within the frustum
if (IsPointVisible(hp))
hits.Add(hp);
}
}
return hits.ToArray();
}