Interactive editing technique and its implementation for virtual tree structure

An interactive virtual tree structure editing method is proposed to address the irreversible tree pruning process challenge in the field management. Parametric 3D tree model was built, and interactive stem picking method based on Back-Buffer is proposed by integrating the tree hierarchical topology. OpenGL rendering technique was used to implement interactive stem editing functions, such as branches pruning, shoot sections pruning, branch length or radius adjustment. Using the canopy type found in common ornamental and afforestation trees as the constraint mode, comprehensive 3D tree morphing can be achieved rapidly and intuitively. This method not only improves the parameter-based 3D tree modeling system, but also provides a digital, visual, intelligent way to plant type design and pruning for virtual tree planting and management.