GLCOLORATTACHMENT14

GLCOLORATTACHMENT14 refers to a specific symbolic constant used in OpenGL, a widely adopted cross-platform graphics and compute API. This constant is part of a set of identifiers used to designate color buffers within a framebuffer object (FBO). Framebuffer objects are essential for rendering operations in modern OpenGL, allowing applications to render to textures or other off-screen targets rather than directly to the screen.

In the context of a single FBO, multiple color buffers can be attached. GLCOLORATTACHMENT14 is the identifier for the fifteenth color buffer in such a setup, assuming zero-based indexing for the attachments. When performing rendering operations, developers can specify which color buffer(s) to write to using functions like glDrawBuffers. This capability is crucial for techniques such as deferred rendering, multi-pass rendering, and the use of multiple render targets (MRTs), where different types of data (e.g., diffuse color, normals, depth) are rendered to separate textures simultaneously.

The use of constants like GLCOLORATTACHMENT14 allows for a flexible and standardized way to manage and access these multiple color buffers. The exact number of color attachments supported by a given OpenGL implementation is queryable through OpenGL extensions or query functions. This numbering scheme ensures that developers can precisely control where rendered pixel data is stored within their FBOs.