edit_armature.py 文件源码

def project_cursor(self, event):
        coord = mathutils.Vector((event.mouse_region_x, event.mouse_region_y))
        transform = bpy_extras.view3d_utils.region_2d_to_location_3d
        region = bpy.context.region
        rv3d = bpy.context.space_data.region_3d
        #### cursor used for the depth location of the mouse
        depth_location = bpy.context.scene.cursor_location
        #depth_location = bpy.context.active_object.location
        ### creating 3d vector from the cursor
        end = transform(region, rv3d, coord, depth_location)
        #end = transform(region, rv3d, coord, bpy.context.space_data.region_3d.view_location)
        ### Viewport origin
        start = bpy_extras.view3d_utils.region_2d_to_origin_3d(region, rv3d, coord)

        ### Cast ray from view to mouselocation
        if b_version_bigger_than((2,76,0)):
            ray = bpy.context.scene.ray_cast(start, (start+(end-start)*2000)-start )
        else:    
            ray = bpy.context.scene.ray_cast(start, start+(end-start)*2000)

        ### ray_cast return values have changed after blender 2.67.0 
        if b_version_bigger_than((2,76,0)):
            ray = [ray[0],ray[4],ray[5],ray[1],ray[2]]

        return start, end, ray