blob: 8565eb3634d188494374744f418640df95ea2967 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
;;;; examples/11-canvas-geometry.lisp
(defpackage #:ww.examples/11
(:use #:cl)
(:export #:start))
(in-package :ww.examples/11)
(defclass geo-demo (ww:application) ())
(ww:defhandler quit
(ww::on-keydown (app scancode)
(when (eql :scancode-q scancode)
(ww::stop))))
(defmethod ww:boot ((app geo-demo))
(let ((canvas
(make-instance 'ww:canvas
:pixel-width 200
:pixel-height 200)))
;; stretch canvas over the whole app
(setf (ww:width canvas) (ww::application-width app)
(ww:height canvas) (ww::application-height app))
;; add it to the display tree
(ww:add-unit app canvas)
;; draw a circle
(ww::with-grid-circle (x y) (150 50 30 :interiorp t)
(ww::with-pixel (r g b a) (ww::pixel canvas x y)
(setf r (mod (* x y) 255)
g x
b y)))
;; draw a bunch of circles
(loop
for cx from 0 to 50 by 5
for cy from 0 to 50 by 5 do
(ww::with-grid-circle (x y) ((+ 100 cx) (+ 100 cy) 10)
(ww::with-pixel (r g b a) (ww::pixel canvas x y)
(setf r (mod (* x y) 256)
g (mod (* x x) 256)
b (mod (* y x) 256)))))
;; draw a random pentagonal thing
(let ((path
(loop repeat 7
collect (list (+ 10 (random 80))
(+ 10 (random 80))))))
(ww::with-grid-path (x y) (path :autoclosep t :interiorp t)
(ww::with-pixel (r g b a) (ww::pixel canvas x y)
(setf r (mod y 256)
g (mod x 256)
b (mod (* x y) 256)))))
;; blit the canvas
(ww::blit canvas)
;; quit handler
(ww:add-handler app #'quit)
(ww:add-handler canvas #'quit)))
(defun start ()
(ww::start
(make-instance
'geo-demo
:fps 10
:width 500
:height 500
:title "Pixels Geometry")))
|
