glClearDepthGLdouble

glClearDepthGLdouble is a function in the OpenGL API used to specify the depth value used when the depth buffer is cleared. The function prototype is:

void glClearDepth(GLdouble depth);

The parameter depth specifies the depth value to which the depth buffer is cleared. This value is clamped to the range [0,1], where 0 represents the nearest depth and 1 represents the farthest depth.

The glClearDepth function is typically used in conjunction with glClear to clear the depth buffer to the specified depth value. This is useful in scenarios where the depth buffer needs to be reset to a specific value, such as at the beginning of a new frame or after rendering a particular object.

It is important to note that the depth value specified by glClearDepth is affected by the current depth range, which can be set using the glDepthRange function. The depth range maps the normalized depth values (in the range [0,1]) to window coordinates.

The glClearDepth function is part of the OpenGL 1.0 core specification and is available in all versions of OpenGL. It is a straightforward function that provides a way to control the depth buffer in OpenGL applications.