Method for rapidly simplifying and drawing complex leaf

Abstract

The invention discloses a method for rapidly simplifying and drawing a complex leaf. The method comprises the following steps of: inputting a tree model and extracting leaf information so as to complete first-time simplification on the complex leaf in leafage; iteratively combining the leaves so as to complete second-time simplification; iteratively combining the leaves in a crown so as to complete third-time simplification; calculating the density of the leaves; respectively storing leaf geometric information and simplification information in two arrays and reading the information; accordingto a current viewpoint and a pixel error, secondarily searching for the arrays storing simplification information; and determining a proper detail level model drawing image of a canopy. The inventionis fit for simplifying the complex leaves of different shapes. The simplification speed can be promoted by using distance limitation so as to realize efficiently abstracting and drawing of the detaillevel model of the canopy. The drawing speed can be improved by establishing a multi-resolution con-existing model of the crown by using density factors. The method of the invention can maintain the shape of the crown, efficiently overcome the deformation phenomenon and finally realize real-time roaming in a forest of tens of thousands of plants.

Description

technical field [0001] The invention belongs to the interdisciplinary field of combining computer graphics and digital agriculture and forestry, and relates to an efficient complex leaf simplification and rendering algorithm. Background technique [0002] The rendering of plant scene is an important subject in computer graphics. Many applications involving outdoor scenes, such as urban planning, garden design, etc., need to add plant models to existing scenes and render them to enhance the realism of the rendering results. However, plants usually have a lot of geometric details, and their addition will cause the rendering speed to drop and fail to meet the real-time requirements. Therefore, how to improve the drawing speed under the premise of ensuring the sense of reality is a key issue. [0003] In order to improve the drawing speed of plant scenes, various algorithms have been proposed one after another. Most algorithms use texture images instead of original complex ge...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is how to quickly simplify plant canopy organs with various shapes, such as leaves, flowers, and fruits, establish multi-resolution representations of plant canopies, and how to efficiently select appropriate resolution representations when drawing Instead of the original model of the canopy, the purpose of real-time is finally achieved, and the realism of the drawing result is ensured. For this reason, the present invention provides a rapid simplification and drawing method of complex leaves

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