public static bool Raycast(Scene scene, Engn_Camera cam, float maxDistance, out Vector3 hitPos, out Drawable hitDrawable)
{
hitDrawable = null;
hitPos = Vector3.Zero;
var oct = scene.GetComponent <Octree>();
RayQueryResultList results = new RayQueryResultList();
var ray = cam.GetRay();
var query = new RayOctreeQuery(results, ray, RayQueryLevel.RayTriangle, maxDistance, DrawableFlags.DrawableGeometry);
oct.Raycast(query);
for (int i = 0; i < results.Count; i++)
{
var result = results[i];
hitDrawable = result.Drawable;
if (hitDrawable != null)
{
if (hitDrawable.Node.GetComponent <WirePlane>() != null)
{
hitDrawable = null;
continue;
}
}
hitPos = result.Position;
return(true);
}
return(false);
}
public static void PaintDecal(Application app, Scene scene, Engn_Camera cam)
{
Vector3 hitPos;
Drawable hitDrawable;
if (Rbfx_Utility.Raycast(scene, cam, 250.0f, out hitPos, out hitDrawable))
{
var targetNode = hitDrawable.Node;
var decal = targetNode.GetComponent <DecalSet>();
if (decal == null)
{
var cache = app.Context.Cache;
decal = targetNode.CreateComponent <DecalSet>();
var decalse = new DecalSet(app.Context);
decal.Material = Material_Ext.noLitFromColor(new Color(1, 0, 0, .5f), false);
//cache.GetMaterial("Materials/UrhoDecal.xml");
}
// Add a square decal to the decal set using the geometry of the drawable that was hit, orient it to face the camera,
// use full texture UV's (0,0) to (1,1). Note that if we create several decals to a large object (such as the ground
// plane) over a large area using just one DecalSet component, the decals will all be culled as one unit. If that is
// undesirable, it may be necessary to create more than one DecalSet based on the distance
decal.AddDecal(
hitDrawable, //drawable triangle
hitPos, //location
cam.CameraNode.Rotation, //Rotation
0.5f, //size
1.0f, //aspect ratio
1.0f, //depth
Vector2.ZERO, //uv top left coor
Vector2.ONE, //uv bottomright coor
0.0f, //timetolive
0.1f, //normalCutoff
uint.MaxValue);
}
}
