glTexCoord

GlTexCoord is a function in the OpenGL API used to specify a texture coordinate at runtime. It is used in conjunction with the glTexImage2D and glTexSubImage2D functions to map 2D texture images to objects in 3D space.

The texture coordinates specified by glTexCoord are used to determine how the texture is applied to the surface of the object. They are typically used in combination with the vertex coordinates to map the texture onto the object's surface. The texture coordinates are usually used to address a texture image that has been loaded into memory, and they are used to determine where the texture should be sampled from.

The function has the following syntax: glTexCoord (int x, int y), where x and y are the texture coordinates. The values of x and y determine how much of the texture image is mapped to the current vertex. Values from 0 to 1 typically range from the bottom left to the top right corner of the texture image.

Texture coordinates can be specified multiple times using glTexCoord, and they remain in effect until a new call is made. This allows for flexible texture coordinate specification, particularly in applications where complex texture mappings are required. In addition to providing vertex positions, OpenGL programs can also provide two-dimensional texture coordinates using the glTexCoord function.