glScissorArrayv

glScissorArrayv is a function in the OpenGL programming interface used for managing scissor boxes. Scissor boxes are rectangular regions within the viewport. Any drawing operations that fall outside a scissor box are clipped, meaning they are not rendered. This function is specifically designed for managing an array of scissor boxes, allowing for more complex clipping scenarios.

The glScissorArrayv function takes two main arguments: an index and a pointer to an array of values. The index specifies which scissor box in the array is being modified. The pointer provides the new values for the scissor box, typically representing its left, bottom, width, and height. This allows developers to define multiple distinct clipping regions for different parts of the rendering pipeline.

Using glScissorArrayv can be beneficial for performance when rendering complex scenes with many distinct areas that require clipping. Instead of repeatedly calling the glScissor function for individual boxes, a single call to glScissorArrayv can update multiple scissor regions efficiently. It is part of the advanced OpenGL features, often used in conjunction with framebuffer objects and tessellation shaders for sophisticated rendering techniques.