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A three-dimensional streamline lighting method to enhance spatial perception

A lighting method and a three-dimensional flow field technology, applied in 3D image processing, image data processing, instruments, etc., can solve problems such as two-way shadows and space confusion, and achieve the effects of improving lighting effects, enhancing spatial perception, and good spatial structure

Inactive Publication Date: 2015-10-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to provide a three-dimensional streamline lighting method suitable for flow field visualization in order to solve the technical problems of two-way shadows and space confusion existing in the existing streamline lighting model, add lighting effects to three-dimensional streamlines, and enhance three-dimensional flow Spatial awareness of line graphs to improve visualization of 3D flow fields

Method used

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  • A three-dimensional streamline lighting method to enhance spatial perception
  • A three-dimensional streamline lighting method to enhance spatial perception
  • A three-dimensional streamline lighting method to enhance spatial perception

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Embodiment Construction

[0026] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] figure 1 A flow chart of the three-dimensional streamline lighting method of the present invention is provided, and its main steps are as follows:

[0028] Step 1. Input 3D flow field data and corresponding 3D streamline data.

[0029] The present invention adopts such as figure 2 The test flow field shown is used as an implementation example. At present, no lighting is added to the flow field, and its visualization effect is relatively poor; although there are many streamlines, the spatial structure revealed by these streamlines is not clear.

[0030] Step 2. Establish a Cartesian reference coordinate system according to the observation direction and flow field sampling points.

[0031] for figure 2 The test flow field shown, assuming a given viewing direction such as image 3 V in the. Under this condition, for any streamlin...

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Abstract

The invention relates a flow line illumination method, in particular to a three-dimensional flow line illumination method for enhancing spatial awareness, and belongs to the technical field of three-dimensional flow field visualization effect enhancement. According to the three-dimensional flow line illumination method for enhancing spatial awareness, a three-dimensional flow line is regarded as the sample of a three-dimensional flow surface, a flow line illumination effect which is calculated through a microflow surface relaying on a viewpoint is structured; a structure method of the microflow surface on a flow line sampling point and a computing method of the microflow surface normal vector are provided; the illumination effect of the flow line is calculated according to obtained microflow surface normal vector and a general surface reflection illumination model. By means of the three-dimensional flow line illumination method for enhancing spatial awareness, the bidirectional shadow problem existing in a maximum reflected light model is solved, the spatial confusion problem existing in a cylinder average model is solved, the illumination effect of the three-dimensional flow line is improved, the spatial awareness of a three-dimensional flow line pattern is enhanced, the spatial structure of the three-dimensional flow line can be shown well, and the visualization effect based on the three-dimensional flow field can be enhanced.

Description

technical field [0001] The invention relates to a streamline lighting method, in particular to a three-dimensional streamline lighting method for enhancing space perception, and belongs to the technical field of three-dimensional flow field visualization effect enhancement. Background technique [0002] Streamlines are one of the basic ways to visualize flow fields (also known as vector fields), and are widely used in fields such as fluid mechanics and aerodynamics. However, for 3D flow fields, the visualization of streamlines is not ideal, because 3D streamlines often occlude each other, affecting the perception of spatial structure. In the field of computer graphics, an effective way to enhance three-dimensional space perception is to add lighting effects to the scene according to a certain lighting model, and express the three-dimensional space structure through the light and dark changes of the scene. Commonly used lighting models for adding lighting effects are: Phong ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/50
Inventor 张文耀裴悦竹马天宝宁建国
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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