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quad.lisp
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quad.lisp
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;; quad.lisp
;;
;; Copyright (c) 2022 Jeremiah LaRocco <jeremiah_larocco@fastmail.com>
;; Permission to use, copy, modify, and/or distribute this software for any
;; purpose with or without fee is hereby granted, provided that the above
;; copyright notice and this permission notice appear in all copies.
;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
;; WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
;; MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
;; ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
;; WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
;; ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
;; OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
(in-package :simple-gl)
(defclass quad (opengl-object)
()
(:documentation "A quad."))
(defmethod initialize-buffers ((object quad) &key)
(when (buffers object)
(error "Object buffers already setup!"))
(set-buffer object
:vertices
(constant-attribute-buffer
`(
,(vec3 -1.0f0 -1.0f0 0.0f0)
,(vec2 0.0f0 0.0f0)
,(vec3 1.0f0 -1.0f0 0.0f0)
,(vec2 1.0f0 0.0f0)
,(vec3 1.0f0 1.0f0 0.0f0)
,(vec2 1.0f0 1.0f0)
,(vec3 -1.0f0 1.0f0 0.0f0)
,(vec2 0.0f0 1.0f0))
(* 4 5)
'(("in_position" . :vec3)
("in_tex" . :vec2))))
(set-buffer object
:indices
(make-instance 'index-buffer
:idx-count 6
:pointer (to-gl-array :unsigned-int
6
#(0 1 2 2 3 0)))))