cursor_ray Function

private function cursor_ray(self, x, y, origin, direction) result(ok)

The ray from the eye through point (x, y) of the window (-1 to 1 across it, y up: as the event handler's positions), in the root frame, as at the last frame: its origin (the eye; in an orthographic view, on the eye's plane) and its direction (a unit vector). False before the first frame. E.g. where the cursor points on a plane: vkf_pick's ray_plane.

Type Bound

WindowProxy

Arguments

Type IntentOptional Attributes Name
class(WindowProxy), intent(in) :: self
real(kind=wp), intent(in) :: x

-1 to 1 across the window, y up
real(kind=wp), intent(in) :: y

-1 to 1 across the window, y up
real(kind=wp), intent(out) :: origin(3)

root frame (direction: a unit vector)
real(kind=wp), intent(out) :: direction(3)

root frame (direction: a unit vector)

Return Value logical


Calls

proc~~cursor_ray~~CallsGraph proc~cursor_ray WindowProxy%cursor_ray proc~ray ray proc~cursor_ray->proc~ray proc~view_camera view_camera proc~cursor_ray->proc~view_camera interface~vkf_viewer_pixel_ratio vkf_viewer_pixel_ratio proc~view_camera->interface~vkf_viewer_pixel_ratio interface~vkf_viewer_size vkf_viewer_size proc~view_camera->interface~vkf_viewer_size proc~aspect_ratio aspect_ratio proc~view_camera->proc~aspect_ratio proc~field_of_view View%field_of_view proc~view_camera->proc~field_of_view proc~get_camera WindowProxy%get_camera proc~view_camera->proc~get_camera proc~is_open WindowProxy%is_open proc~view_camera->proc~is_open proc~orthographic_bounds View%orthographic_bounds proc~view_camera->proc~orthographic_bounds proc~pick_camera pick_camera proc~view_camera->proc~pick_camera proc~projection_type View%projection_type proc~view_camera->proc~projection_type proc~aspect_ratio->interface~vkf_viewer_size proc~get_camera->proc~is_open interface~vkf_viewer_get_look_at vkf_viewer_get_look_at proc~get_camera->interface~vkf_viewer_get_look_at proc~rigid_inverse rigid_inverse proc~get_camera->proc~rigid_inverse proc~transform_camera transform_camera proc~get_camera->proc~transform_camera proc~world_to_view View%world_to_view proc~get_camera->proc~world_to_view proc~cross cross proc~pick_camera->proc~cross proc~world_to_view->proc~rigid_inverse proc~frame_to_root frame_to_root proc~world_to_view->proc~frame_to_root proc~identity_matrix identity_matrix proc~world_to_view->proc~identity_matrix proc~quat_from_vectors quat_from_vectors proc~world_to_view->proc~quat_from_vectors proc~quat_to_matrix quat_to_matrix proc~world_to_view->proc~quat_to_matrix proc~rotated rotated proc~world_to_view->proc~rotated proc~translation_matrix translation_matrix proc~world_to_view->proc~translation_matrix proc~frame_to_root->proc~rigid_inverse proc~world_matrix ReferenceFrame%world_matrix proc~frame_to_root->proc~world_matrix proc~quat_from_vectors->proc~cross proc~quat_normalize quat_normalize proc~quat_from_vectors->proc~quat_normalize proc~translation_matrix->proc~identity_matrix proc~world_matrix->proc~world_matrix proc~local_matrix ReferenceFrame%local_matrix proc~world_matrix->proc~local_matrix proc~frame_matrix frame_matrix proc~local_matrix->proc~frame_matrix proc~frame_matrix->proc~quat_to_matrix

Called by

proc~~cursor_ray~~CalledByGraph proc~cursor_ray WindowProxy%cursor_ray proc~drag_handle drag_handle proc~drag_handle->proc~cursor_ray proc~grab_handle grab_handle proc~grab_handle->proc~cursor_ray proc~dispatch_event dispatch_event proc~dispatch_event->proc~drag_handle proc~dispatch_event->proc~grab_handle proc~dispatch_events dispatch_events proc~dispatch_events->proc~dispatch_event proc~frame WindowProxy%frame proc~frame->proc~dispatch_events proc~resize WindowProxy%resize proc~resize->proc~frame proc~run WindowProxy%run proc~run->proc~frame

Source Code

    logical function cursor_ray(self, x, y, origin, direction) result(ok)
        class(WindowProxy), intent(in) :: self
        real(wp), intent(in) :: x, y                        !! -1 to 1 across the window, y up
        real(wp), intent(out) :: origin(3), direction(3)    !! root frame (direction: a unit vector)
        type(PickCamera) :: cam
        origin = 0.0_wp
        direction = [0.0_wp, 0.0_wp, -1.0_wp]
        ok = view_camera(self, x, y, cam)
        if (ok) call ray(cam, origin, direction)
    end function cursor_ray