GLNVviewportarray2

GLNVviewportarray2 is a function provided by the OpenGL API, specifically part of the OpenGL 4.1 core profile and later versions. This function allows developers to define multiple viewports within a single rendering context. A viewport is a rectangular region within the window where OpenGL renders images. By using GLNVviewportarray2, developers can specify multiple viewports simultaneously, which can be useful for various advanced rendering techniques such as multi-viewport rendering, split-screen effects, or rendering to multiple textures or framebuffers.

The function signature for GLNVviewportarray2 is as follows:

void glViewportArrayv(uint first, sizei count, const float *v);

The parameters for this function are:

first: Specifies the index of the first viewport to be modified.

count: Specifies the number of viewports to be modified.

v: A pointer to an array of floats, where each viewport is defined by four consecutive floats representing the lower left corner (x, y) and the width and height (w, h) of the viewport.

This function is particularly useful in scenarios where multiple viewports need to be updated frequently, as it allows for batch updates rather than updating each viewport individually. This can lead to performance improvements in applications that require dynamic viewport adjustments.

GLNVviewportarray2 is part of the OpenGL 4.1 core profile and later, and it is available on platforms that support these versions of OpenGL. It is important to note that while this function provides a convenient way to manage multiple viewports, it does not handle the rendering to these viewports; that is still managed through standard OpenGL rendering commands.