"world_to_camera_view" would be good I think.
On Thu, Jun 13, 2013 at 5:24 PM, Campbell Barton <ideasma...@gmail.com> wrote: > Fair point, not really a fan of `ndc space`, though I can't think of > one I'm especially happy with either... > > other possibilities ... > world_to_view2d (except it returns z component) > world_to_camera_frame (since it uses camera framing functions, though > this is more of a detail) > world_to_view_uvw > world_to_render ? > > On Fri, Jun 14, 2013 at 12:06 AM, Brecht Van Lommel > <brechtvanlom...@pandora.be> wrote: >> Nitpick about the terminology used here. "Camera space" usually refers >> to the coordinates when transformed by the camera matrix but without >> any perspective transformation applied, so I would say "2D camera >> space coords" here. OpenGL and Renderman would call the result of this >> function Normalized Device Coordinates, though I'm not sure if there >> is a common name for the space, maybe "NDC space". >> >> On Thu, Jun 13, 2013 at 3:51 PM, Campbell Barton <ideasma...@gmail.com> >> wrote: >>> Revision: 57433 >>> >>> http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=57433 >>> Author: campbellbarton >>> Date: 2013-06-13 13:51:01 +0000 (Thu, 13 Jun 2013) >>> Log Message: >>> ----------- >>> handy function for getting the 2d camera coords for a worldspace location. >>> >>> bpy_extras.object_utils.world_to_camera(scene, obj, coord) >>> >>> Modified Paths: >>> -------------- >>> trunk/blender/release/scripts/modules/bpy_extras/object_utils.py >>> >>> Modified: trunk/blender/release/scripts/modules/bpy_extras/object_utils.py >>> =================================================================== >>> --- trunk/blender/release/scripts/modules/bpy_extras/object_utils.py >>> 2013-06-13 13:09:32 UTC (rev 57432) >>> +++ trunk/blender/release/scripts/modules/bpy_extras/object_utils.py >>> 2013-06-13 13:51:01 UTC (rev 57433) >>> @@ -25,6 +25,7 @@ >>> "object_add_grid_scale", >>> "object_add_grid_scale_apply_operator", >>> "object_image_guess", >>> + "world_to_camera", >>> ) >>> >>> >>> @@ -265,3 +266,40 @@ >>> if image is not None: >>> return image >>> return None >>> + >>> + >>> +def world_to_camera(scene, obj, coord): >>> + """ >>> + Returns the 2d camera space coords for a 3d point. >>> + >>> + Where (0, 0) is the bottom left and (1, 1) is the top right of the >>> camera frame. >>> + values outside 0-1 are also supported. >>> + >>> + Takes shift-x/y, lens angle and sensor size into account >>> + as well as perspective/ortho projections. >>> + >>> + :arg scene: Scene to use for frame size. >>> + :type scene: :class:`bpy.types.Scene` >>> + :arg obj: Camera object. >>> + :type obj: :class:`bpy.types.Object` >>> + :arg coord: World space location. >>> + :type coord: :class:`mathutils.Vector` >>> + :return: normalized 2d vector. >>> + :rtype: :class:`mathutils.Vector` >>> + """ >>> + >>> + co_local = obj.matrix_world.normalized().inverted() * coord >>> + >>> + camera = obj.data >>> + frame = [-v for v in camera.view_frame(scene=scene)[:3]] >>> + if camera.type != 'ORTHO': >>> + frame = [(v / -v.z) * co_local.z for v in frame] >>> + >>> + min_x, max_x = frame[1].x, frame[2].x >>> + min_y, max_y = frame[0].y, frame[1].y >>> + >>> + x = (co_local.x - min_x) / (max_x - min_x) >>> + y = (co_local.y - min_y) / (max_y - min_y) >>> + >>> + from mathutils import Vector >>> + return Vector((x, y)) >>> >>> _______________________________________________ >>> Bf-blender-cvs mailing list >>> bf-blender-...@blender.org >>> http://lists.blender.org/mailman/listinfo/bf-blender-cvs >> _______________________________________________ >> Bf-committers mailing list >> Bf-committers@blender.org >> http://lists.blender.org/mailman/listinfo/bf-committers > > > > -- > - Campbell > _______________________________________________ > Bf-committers mailing list > Bf-committers@blender.org > http://lists.blender.org/mailman/listinfo/bf-committers _______________________________________________ Bf-committers mailing list Bf-committers@blender.org http://lists.blender.org/mailman/listinfo/bf-committers
