;;;;; Converted from the "Vertices" Processing example at:
;;;;; "http://www.processing.org/learning/examples/vertices.html"
;;;;; (C)2006 Luke J Crook
(in-package #:sdl-gfx-examples)
(defun vertices ()
(let ((width 200) (height 200))
(sdl:with-init ()
(sdl:window width height :title-caption "Vertices, from Processing.org")
(setf (sdl:frame-rate) 5)
(sdl:clear-display (sdl:color))
(sdl:with-surface (disp sdl:*default-display*)
(sdl:with-color (col (sdl:color :r 102 :g 102 :b 102))
;; We can use a point or an x/y spread as the vertex parameter
;; Here we use x/y spread as the vertex parameters
(sdl-gfx:with-curve (:solid 10)
(sdl-gfx:add-vertex-* 168 182)
(sdl-gfx:add-vertex-* 168 182)
(sdl-gfx:add-vertex-* 136 38)
(sdl-gfx:add-vertex-* 42 34)
(sdl-gfx:add-vertex-* 64 200)
(sdl-gfx:add-vertex-* 64 200)))
(sdl:with-color (col (sdl:color :r 51 :g 51 :b 51))
;; Here we use a point as the vertex parameter
(sdl-gfx:with-shape (:dash)
(sdl-gfx:add-vertex (sdl:point :x 60 :y 40))
(sdl-gfx:add-vertex (sdl:point :x 160 :y 10))
(sdl-gfx:add-vertex (sdl:point :x 170 :y 150))
(sdl-gfx:add-vertex (sdl:point :x 60 :y 150))))
(sdl:with-color (col (sdl:color :r 255 :g 255 :b 255))
;; Here we use x/y spread as the vertex parameters
(sdl-gfx:with-shape (:points)
(sdl-gfx:add-vertex-* 60 40)
(sdl-gfx:add-vertex-* 160 10)
(sdl-gfx:add-vertex-* 170 150)
(sdl-gfx:add-vertex-* 60 150)))
(sdl:with-color (col (sdl:color :r 126 :g 126 :b 126))
;; Here we use a point as the vertex parameter
(sdl-gfx:with-bezier (10)
(sdl-gfx:add-vertex (sdl:point :x 60 :y 40))
(sdl-gfx:add-vertex (sdl:point :x 160 :y 10))
(sdl-gfx:add-vertex (sdl:point :x 170 :y 150))
(sdl-gfx:add-vertex (sdl:point :x 60 :y 150)))))
(sdl:update-display)
(sdl:with-events ()
(:quit-event () t)
(:video-expose-event () (sdl:update-display))))))
