Resumo

MARTINEZ MENDOZA, Jordanys; ESPINOSA LOPEZ, Zailyn  e  CHARLES SOTELO, Joel. Methods for rendering polylines with geospatial coordinates in OpenGL ES 2.0. Rev cuba cienc informat [online]. 2021, vol.15, n.3, pp.74-91.  Epub 01-Set-2021. ISSN 2227-1899.

The present work offers a solution for rendering of polylines with geospatial coordinates in OpenGL ES, a simplified variant of the OpenGL graphical application programming interface for devices such as mobile phones. A mathematical analysis was made to create a method for obtaining the Model-View-Projection matrix, which was used in the transformation of the coordinates corresponding to each of the polylines, since the ranges of values ​​of these are not understood in the normalized OpenGL space, which is -1 to 1, but they are in relation to the coordinate system to which they belong; accordingly, it was possible to handle higher coordinate ranges. Using the Unified Modeling Language, class diagrams are presented, which group together OpenGL ES-specific concepts and those related to rendering elements through the shading language and methods to ensure high drawing performances. It also proposes how to create and configure an application in Visual Studio 2017, with the cross-platform development module, for the creation of mobile applications in C ++, with OpenGL ES 2.0. For the validation of the proposed methods, a test application for the Android operating system was implemented.

Palavras-chave : geospatial; rendering; OpenGL ES; Model-View-Projection; shading language.

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