Add scratch.lisp to .hgignore.
author |
Steve Losh <steve@stevelosh.com> |
date |
Fri, 22 Apr 2016 23:12:34 +0000 |
parents |
2278039315fa |
children |
67072984548b |
(in-package #:coding-math.ballistics)
;;;; Config
(defparameter *width* 600)
(defparameter *height* 400)
(defparameter *center-x* (/ *width* 2))
(defparameter *center-y* (/ *height* 2))
(defun draw-gun (gun)
(in-context
(translate (a gun 'x) (a gun 'y))
(with-pen (make-pen :stroke (gray 0.0) :fill (gray 0.0))
(circle 0 0 15)
(rotate (degrees (a gun 'angle)))
(rect 0 -4 25 8)
)))
(defun aim (gun x y)
(setf (cdr (assoc 'angle gun))
(clamp (- (/ tau 4))
-0.3
(atan (- y (a gun 'y))
(- x (a gun 'x))))))
(defsketch game (:width *width*
:height *height*
:debug :scancode-d)
((frame 1)
(aiming nil)
(gun `((x . 40)
(y . ,*height*)
(angle . ,(- (/ tau 8))))))
(background (gray 1))
(incf frame)
;;
(draw-gun gun)
;;
(when (zerop (mod frame 20))
(calc-fps 20))
(draw-fps))
(defmethod kit.sdl2:mousebutton-event
((game game) state timestamp button x y)
(declare (ignore timestamp x y))
(when (= 1 button)
(case state
(:mousebuttondown (setf (slot-value game 'aiming) t))
(:mousebuttonup (setf (slot-value game 'aiming) nil)))))
(defmethod kit.sdl2:mousemotion-event
((game game) timestamp button-mask x y xrel yrel)
(declare (ignore timestamp button-mask xrel yrel))
(when (slot-value game 'aiming)
(aim (slot-value game 'gun) x y)))
;;;; Run
; (defparameter *demo* (make-instance 'game))