import bpy from mathutils import Vector from bpy.props import FloatVectorProperty class ViewOperator(bpy.types.Operator): '''Translate the view using mouse events.''' bl_idname = "view3d.modal_operator" bl_label = "Simple View Operator" offset = FloatVectorProperty( name="Offset", size=3, ) def execute(self, context): v3d = context.space_data rv3d = v3d.region_3d rv3d.view_location = self._initial_location + Vector(self.offset) def modal(self, context, event): v3d = context.space_data rv3d = v3d.region_3d if event.type == 'MOUSEMOVE': self.offset = (self._initial_mouse - Vector((event.mouse_x, event.mouse_y, 0.0))) * 0.02 self.execute(context) context.area.header_text_set("Offset %.4f %.4f %.4f" % tuple(self.offset)) elif event.type == 'LEFTMOUSE': context.area.header_text_set() return {'FINISHED'} elif event.type in {'RIGHTMOUSE', 'ESC'}: rv3d.view_location = self._initial_location context.area.header_text_set() return {'CANCELLED'} return {'RUNNING_MODAL'} def invoke(self, context, event): if context.space_data.type == 'VIEW_3D': v3d = context.space_data rv3d = v3d.region_3d context.window_manager.modal_handler_add(self) if rv3d.view_perspective == 'CAMERA': rv3d.view_perspective = 'PERSP' self._initial_mouse = Vector((event.mouse_x, event.mouse_y, 0.0)) self._initial_location = rv3d.view_location.copy() return {'RUNNING_MODAL'} else: self.report({'WARNING'}, "Active space must be a View3d") return {'CANCELLED'} def register(): bpy.utils.register_class(ViewOperator) def unregister(): bpy.utils.unregister_class(ViewOperator) if __name__ == "__main__": register()