Tree animation simulation method based on simplification modal analytical method

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.

Description

technical field [0001] The invention relates to the field of computer graphics, in particular to a tree animation simulation method based on a simplified modal analysis method. Background technique [0002] The tree animation simulation technology based on computer graphics has a wide range of application values ​​in the fields of 3D animation, film and television special effects, battlefield virtual reality, garden design, and agricultural and forestry informatization. In three-dimensional animation and film and television special effects, the introduction of dynamic tree models can greatly increase the realism of the scene; in the battlefield virtual reality environment, applying the dynamic model of trees to military simulation training can enhance the immersion of simulation; In the field of agriculture and architecture, it can support landscape design and environmental decision-making; in the field of agricultural informatization, the tree animation generated by compute...

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Problems solved by technology

[0004] Among them, the "physics-based simulation technology" mainly uses the modal analysis method to solve the dynamic equation of the tree, which can reflect the Lissajous curve of the branch movement, but there are problems with the high complexity of the solution and the neglect of high-frequency vibration modes, which will cause the leaves and twigs to The problem of the loss of detailed motion of the tree; the "process-based simulation technology" does not take into account the mutual influence of

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