An efficient gradient coloring method for 3D terrain based on WPF

Abstract

The invention relates to a WPF-based high-efficiency gradient coloring method for three-dimensional terrain, comprising the steps: S1 using a specific algorithm to generate a gradient bitmap with a size of 64*64 in memory according to the color level of a custom gradient ribbon, and storing it As the image source (ImageSource) of the image brush (ImageBrush); S2 constructs a mapping function between the color value corresponding to different elevation values ​​and the position in the gradient bitmap; S3 generates the triangular faces that constitute the 3D terrain model according to the terrain elevation information, and Use the image brush (ImageBrush) and mapping function created in steps S1 and S2 to generate the texture corresponding to each triangle unit, and construct the GeometryModel3D instance of the 3D terrain model; S4 use the previous step to construct the GeometryModel3D instance, and set the 3D in WPF Canvas, angle of view, lighting and other elements to complete the construction of a terrain 3D model that is gradually colored according to elevation information. Based on the WPF framework, the present invention greatly saves system resources, remarkably improves three-dimensional rendering efficiency, has simple color transition processing method for adjacent triangle units constituting a three-dimensional terrain model, and has good color transition effect.

Description

technical field [0001] The invention relates to a WPF-based high-efficiency gradient coloring method for three-dimensional terrain, which belongs to the field of computer three-dimensional display. Background technique [0002] WPF (Windows Presentation Foundation) is a new generation of graphics system from Microsoft. WPF is further encapsulated on the basis of the DirectX graphics engine, and provides a set of classes for easily building three-dimensional graphics and user interfaces. Compared with the underlying graphics APIs such as OpenGL and DirectX, WPF can be used to construct a 3D display system more conveniently and quickly. However, due to the high degree of encapsulation of WPF, the three-dimensional rendering efficiency is lost. [0003] In the practical application of informatization in industries such as water conservancy, geology, transportation, and land, it is often necessary to display terrain elements in three-dimensional space and to perform gradient c...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a three-dimensional graphics gradient coloring method based on the WPF framework, to solve the problems of large system resource consumption and low rendering efficiency when performing gradient coloring on a large number of triangle units, and to achieve efficient and beautiful three-dimensional terrain display

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