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Building crack generating method based on L system

A technology for buildings and cracks, applied in the field of computer simulation and virtual reality, can solve problems such as crack shape simulation

Active Publication Date: 2014-09-03
BEIHANG UNIV
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Problems solved by technology

However, the current research in related fields mostly focuses on analyzing the causes of cracks from the physical mechanism and preventing or repairing them, and seldom involves the simulation of crack shapes.

Method used

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  • Building crack generating method based on L system
  • Building crack generating method based on L system
  • Building crack generating method based on L system

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] The present invention is a building crack generation method based on the L system, which summarizes the characteristics of the cracks according to the shape of the cracks in the building, determines the deduction rules of the basic small graphics elements, and determines the deduction rules of the large graphics elements according to the physical picture of the cracks in the building, and then according to The summarized constraints randomly generate the crack model, and the overall process is as follows figure 1 shown, including the following steps:

[0022] Step 1: Analyze the morphological characteristics of building cracks and determine the L system character set, including (1a) and (1b).

[0023] (1a) Analyze the morphological characteristics of building cracks according to the physical pictures of building cracks.

[0024] according to figure...

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Abstract

The invention provides a building crack generating method based on an L system. The building crack generating method is used for generating virtual building cracks and comprises the steps that firstly, form characteristics of building cracks are analyzed, and an L system character set is determined; secondly, basic small pixels are determined according to the form characteristics of the building cracks, large pixels are extracted according to object pictures of the building cracks, and a deduction rule of the small pixels and the large pixels is described through the L system character set obtained in the first step; finally, the constraint condition in the random generation process of the cracks is determined, iteration is carried out on the basic small pixels one to four times according to the constraint condition, and pixels are randomly selected from the large pixels to be combined with the iterated small pixels to form the cracks. According to the building crack generating method based on the L system, the deduction rule fitting the forms of the cracks is provided, the form of a crack model generated randomly approaches the natural form, and the generated cracks keep the random characteristic.

Description

technical field [0001] The invention relates to a method for generating building cracks based on an L system, which belongs to the fields of virtual reality and computer simulation. Background technique [0002] The L system was proposed by Hungarian biologist Aristid LinderMayer in 1968. The essence of the L system is a rewriting system. Through the empirical generalization and abstraction of the growth process of plant objects, the initial state and description rules, a limited number of iterations are performed to generate character development sequences to represent the topological structure of plants, and the generated characters By performing geometric interpretation on strings, very complex fractal graphics can be generated. [0003] As a phenomenon, cracks are ubiquitous in various buildings, whether on the wall or on the floor, although the causes are different, they all have similar geometric shapes, that is, irregularity, uncertainty, and ambiguity. And satisfy ...

Claims

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Application Information

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IPC IPC(8): G06T11/00
Inventor 李妮王超一张鑫丁莹
Owner BEIHANG UNIV
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