3D plant branch modeling method based on hand-painting
A modeling method and branch technology, which is applied in the field of hand-painted 3D plant branch modeling, can solve the problems of ineffective representation of plant branch changeable shapes, distortion, slow drawing speed, etc., and achieve flexible parameter adjustment methods convenient effect
Inactive Publication Date: 2018-01-12
JIANGSU UNIV
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[0003] At present, the hand-painted plant branch modeling method is mainly based on the sketch-based hand-painted system proposed by Okabe of the University of Tokyo in Japan. This system uses an algorithm to generate 3D branches based on the 2D planar plant skeleton drawn by the user. There will be different degrees of distortion in the process, and the drawing speed is also slow, which cannot effectively express the varied shapes of plant branches.
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[0038] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.
[0039] figure 1 It is a flowchart of a hand-painted 3D plant branch modeling method, including the following steps:
[0040] 1) Draw the branch skeleton of the plant, that is, build a 3D acquisition window, set a fixed depth value in the window, and use the mouse to draw different branches in different viewing planes through perspective transformation, so as to obtain the branch skeleton of the plant ;In this implementation example, build a 3D drawing window, use it as the collection area of 3D data, set the depth value to 0.5, the user can click the button to switch the type of branches drawn, and then use the mouse to draw in the area the skeleton of a plant;
[0041] 2) Collect the branch skeleton points to obtain the initial branch skeleton 3D point set data; if the user needs more complex and more branches, a random algorithm can be...
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The present invention relates to the field of computer graphics processing and human-computer interaction, in particular to a hand-painted 3D plant branch modeling algorithm, comprising the following steps: constructing a 3D acquisition window, and hand-painting the skeleton of the 3D plant branch in the window; Extract the 3D plant skeleton information to obtain the point set data of the plant branches; use the denoised and simplified branch point set data as the center to construct a hexagonal platform to generate plant branches of different thicknesses. The hand-painted 3D plant branch modeling algorithm of the present invention can directly draw the 3D branch skeleton without 2D to 3D skeleton conversion. Restoring the characteristics of plants makes the reconstructed plant branch models more in line with the original hand-drawn sketches.
Description
technical field [0001] The invention relates to the fields of computer graphics processing and human-computer interaction, in particular to a hand-painted 3D plant branch modeling method. Background technique [0002] Plant modeling is one of the hotspots in computer graphics research, and it is also an important part of virtual reality. Due to the variety of plants, which are easily affected by the external environment and human factors, the geometric forms of plants are rich and varied, and it is impossible to find a general generation algorithm for plants. Therefore, plant modeling and simulation has always been a challenging subject in computer graphics. [0003] At present, the hand-painted plant branch modeling method is mainly based on the sketch-based hand-painted system proposed by Okabe of the University of Tokyo in Japan. This system uses an algorithm to generate 3D branches based on the 2D planar plant skeleton drawn by the user. There will be different degrees...
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IPC IPC(8): G06T17/00G06T15/00
Inventor 曾兰玲张巍杨保安陈天放张晓庆
Owner JIANGSU UNIV