LDM-Pack: A New Method for Rendering Trees Rapidly
层次深度拼图集：一种新的树木快速绘制方法

This paper presents a new specification of LDM-Pack tree, which renders trees rapidly with high fidelity. It first samples the tree model, and gains its LDI-Packs. All LDI-Pack textures are compressed by an occlusion-inclusive compression approach, and packed into texture packages. Then the corresponding LDM-Packs are created from LDI-Packs according to the predetermined viewpoints. Thus, a tree is specified by a group of LDM-Packs with several sample directions. When rendering stage, one blending scheme is used to render correct LDM-Packs for smooth transitions. Shown by the experiments, the number of rendering depth mosaics is less than the one of the tree original polygons.