Patent
Tree animation simulation method based on simplification modal analytical method
TLDR
In this article, a tree animation simulation method based on a simplification modal analytical method is proposed, where modal analysis is carried out on independent leaves and leaf stalks but not on a whole tree, then a dynamical model of the broad leaves is combined, and a new dynamic model of a tree is set up through matrix transformation according to the hierarchical structure of the tree.Abstract:
The invention relates to a tree animation simulation method based on a simplification modal analytical method. According to the simulation method, modal analysis is carried out on independent leaves and leaf stalks but not on a whole tree, then a dynamical model of the broad leaves is combined, and a new dynamical model of the tree is set up through matrix transformation according to the hierarchical structure of the tree. The method comprises the specific steps: a dynamical model of a three-dimensional bending cantilever beam is set up, dynamical equations of the bending beam are respectively expressed as a time domain equation and a space domain equation by adopting a variable separation method, an air dynamical model is set up to determine the sum of the external force applied on branches, the dynamical model of the leaves is set up to solve the sum of the external force applied on blades, and a tree model and the dynamical model of the whole tree are set up. The tree animation simulation method can be used for developing three-dimensional tree animation simulation engines, serves as a support for development of virtual reality, game and three-dimensional animation core technologies, and has the important application prospect.read more
Citations
More filters
Patent
Video driving-based outdoor tree computer animation generation method
TL;DR: In this paper, a video driving-based outdoor tree computer animation generation method is presented, which includes the following steps that: a static tree model is reconstructed; the displacement of three dominant vibration modes is determined; an L-K optical flow method and an interactive type manual selection-based semi-automatic tracking algorithm are adopted to track the feature points of atree motion video, so that branch and leave movement trajectories represented by relative deflection angles are obtained; fast Fourier transformation is performed on the branch and leaves movement trajectory, a frequency corresponding to the maximum value of a
Patent
Method for simulating swaying of leafless trees in wind based on longitudinal segmentation
Wang Yinghui,Jing Tang,Huanhuan Zhang,Wen Hao,Ning Xiaojuan,Zhenghao Shi,Minghua Zhao,Zhou Hongfang +7 more
TL;DR: In this paper, a method for simulating swaying of leafless trees in wind based on longitudinal segmentation is presented, which can be used for reconstructing some part of the leafless tress to act with the wind to simulate the swaying movement.
Patent
Wind exposure processing method and system for three-dimensional games
TL;DR: In this article, a wind exposure processing method and system for three-dimensional games is presented, which consists of: setting animation parameters when geometry in a game is exposed to wind, calculating wind exposure animation parameters of the geometry at a plurality of time points changing along with the time frame by frame, and sending the wind exposure parameters of geometry to a shader through an interface.
Patent
Clustering-based method for simulating swaying of leafy tree under wind blowing
Wang Yinghui,Jing Tang,Huanhuan Zhang,Wen Hao,Ning Xiaojuan,Zhenghao Shi,Minghua Zhao,Zhou Hongfang +7 more
TL;DR: In this paper, a clustering-based method for simulating swaying of a leafy tree under wind blowing is presented, which consists of dividing the leafy trees and conducting density clustering on leaves of each equally divided part to generate multiple leave clusters.
References
More filters
Patent
Tree leaf modeling method based on point cloud data
TL;DR: In this article, a tree leaf modeling method based on point cloud data was proposed, which comprises the following steps of preprocessing, namely denoising, smoothing, and the like, the tree leaf point clouds data acquired by a three-dimensional laser scanner; then extracting boundary points and vein points of the point clouds; constructing a grid model of tree leaves by using Delaunary triangular gridding, and drawing a vivid tree leaf model by a texture mapping method; and finally selecting the vein points as control points, and generating the tree leaves of different forms by a La
Journal ArticleDOI
Realistic animation of interactive trees
TL;DR: A mathematical model for animating trees realistically by taking into account the influence of natural frequencies and damping ratios is presented, which allows users to interactively manipulate trees.
Patent
Efficient vegetation cartoon
TL;DR: In this article, an efficient wind animation rendering based on Gpu (Graphics Processing Unit) is disclosed, and can be applied to a plurality of vegetation rendering scenes, thereby not only saving the time for an art designer but also improving the rendering efficiency.
Related Papers (5)
Modelling and analysis of beam/bar structure by application of bond graphs
Cezary Orlikowski,Rafał Hein +1 more