private MeshRenderRaycastInfo RaycastMeshBounds(MeshRenderable renderer)
{
if (renderer.IsRaytracable == false)
{
return(null);
}
if (renderer.IsEnabled == false)
{
return(null);
}
if (renderer.Mesh == null)
{
return(null);
}
if (renderer.Mesh.Bounds == null)
{
return(null);
}
if (renderer.Mesh.Vertices == null)
{
return(null);
}
if (renderer.SceneObject.Layer.Intersects(_currentLayer) == false)
{
return(null);
}
if (renderer.Mesh.Type != PrimitiveType.Triangles)
{
Log.Warning(renderer.Mesh.Type + " is not supported for raytracing");
return(null);
}
var result = new MeshRenderRaycastInfo(_worldSpaceRay, renderer);
if (renderer.Mesh.Bounds.Sphere.FastRaycast(result.ModelSpaceRay))
{
return(result);
}
else
{
return(null);
}
}
private void AddHit(MeshRenderRaycastInfo raycast, Reference <Vector3> hit)
{
var distance = hit.Value.Z;
var hitPoint = raycast.ModelSpaceRay.Origin + raycast.ModelSpaceRay.Direction * distance;
hitPoint = Vector3.Transform(hitPoint, raycast.MeshRenderable.Transform.ModelMatrix);
var raycasthit = new RaycastMeshRendererHit()
{
Distance = Vector3.Distance(_worldSpaceRay.Origin, hitPoint),
Renderer = raycast.MeshRenderable,
Point = hitPoint
};
lock (_results) {
if (_nearestHit > raycasthit.Distance)
{
_nearestHit = raycasthit.Distance;
}
_results.Add(raycasthit);
}
}
private void RaycastMeshTriangles(MeshRenderRaycastInfo raycast)
{
var mesh = raycast.MeshRenderable.Mesh;
var triangle = new Triangle();
if (mesh.Indices != null)
{
for (int i = 0; i < mesh.Indices.Length / 3; i++)
{
triangle.A = mesh.Vertices[(Int32)mesh.Indices[3 * i]];
triangle.B = mesh.Vertices[(Int32)mesh.Indices[3 * i + 1]];
triangle.C = mesh.Vertices[(Int32)mesh.Indices[3 * i + 2]];
var hit = triangle.Raycast(raycast.ModelSpaceRay);
if (hit != null)
{
AddHit(raycast, hit);
}
}
}
else
{
for (int i = 0; i < mesh.Vertices.Length / 3; i++)
{
triangle.A = mesh.Vertices[3 * i];
triangle.B = mesh.Vertices[3 * i + 1];
triangle.C = mesh.Vertices[3 * i + 2];
var hit = triangle.Raycast(raycast.ModelSpaceRay);
if (hit != null)
{
AddHit(raycast, hit);
}
}
}
}
