Graphics.Rendering.OpenGL.GL.Rectangles

This module corresponds to section 10.9 (Rectangles) of the OpenGL 4.4 specs.

Documentation

class Rect a where

rect and rectv support efficient specification of rectangles as two corner points. Each rectangle command takes four arguments, organized either as two consecutive pairs of (x, y) coordinates, or as two pointers to arrays, each containing an (x, y) pair. The resulting rectangle is defined in the z = 0 plane.

rect (Vertex2 x1 y1) (Vertex2 x2, y2) is exactly equivalent to the following sequence:

   renderPrimitive Polygon $ do
       vertex (Vertex2 x1 y1)
       vertex (Vertex2 x2 y1)
       vertex (Vertex2 x2 y2)
       vertex (Vertex2 x1 y2)

Note that if the second vertex is above and to the right of the first vertex, the rectangle is constructed with a counterclockwise winding.

Minimal complete definition

rect, rectv

Methods

rect :: Vertex2 a -> Vertex2 a -> IO ()

rectv :: Ptr a -> Ptr a -> IO ()

Instances

Rect GLshort

Methods

rect :: Vertex2 GLshort -> Vertex2 GLshort -> IO ()

rectv :: Ptr GLshort -> Ptr GLshort -> IO ()

Rect GLint

Methods

rect :: Vertex2 GLint -> Vertex2 GLint -> IO ()

rectv :: Ptr GLint -> Ptr GLint -> IO ()

Rect GLfloat

Methods

rect :: Vertex2 GLfloat -> Vertex2 GLfloat -> IO ()

rectv :: Ptr GLfloat -> Ptr GLfloat -> IO ()

Rect GLdouble

Methods

rect :: Vertex2 GLdouble -> Vertex2 GLdouble -> IO ()

rectv :: Ptr GLdouble -> Ptr GLdouble -> IO ()