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VTP stands for Virtual Terrain Project and is an open source terrain rendering, computing and storage system. It provides a complete set of tools and libraries for creating, editing, rendering and analyzing Digital Terrain Models (DTMs) and related geographic information data.
The file format of VTP adopts XML and binary forms. It can store various types of geographic information data such as elevation data, texture data, vector data, etc. It supports multi-layer representation of terrain, that is, each layer contains a specific type of data.
In addition to file formats, VTP also provides a series of visualization tools, such as OpenGL-based 3D rendering engines, DEM/DTM analysis tools, map editors, etc., to facilitate users to visualize terrain and Data Analysis operations.
COLLADA is an XML-based digital asset exchange solution for interactive 3D applications, allowing 3D creation applications to freely exchange digital assets without losing information - enabling a powerful toolchain pipeline combining multiple DCC and 3D processing software packages. Its unique interactive mode provides a comprehensive visual compilation. COLLADA FX supports the creation and encapsulation of shaders using OpenGL ES shading language, enabling first-class 3D creation tools to effectively collaborate in creating OpenGL / OpenGL ES applications and assets.
COLLADA is an open standard, originally used for 3D software data exchange, initiated by SCEA, and now supported by many well-known manufacturers such as Autodesk and XSI. COLLADA can be used not only for exchanging data between modeling tools, but also as a scene description language for small-scale real-time rendering. Because COLLADA DOM has rich content for representing various elements in the scene, from polygonal geometry to cameras, we can use the COLLADA DOM library to read and process scene files. The programming method of COLLADA DOM is similar to COM.