src/2d/demo.lisp @ 281946a21897

(in-package #:coding-math.2d.demo)

;;;; Config
(defparameter *width* 600)
(defparameter *height* 400)

(defparameter *center-x* (/ *width* 2))
(defparameter *center-y* (/ *height* 2))


;;;; Utils
(defmacro with-setup (&body body)
  `(with-fps
    (background (gray 1))
    ,@body))


;;;; Sketch
(defun draw-particle (p)
  (circle (particle-x p) (particle-y p) (particle-radius p)))

(defun draw-line (p1 p2)
  (with-vecs ((x1 y1) p1 (x2 y2) p2)
    (line x1 y1 x2 y2)))

(defun draw-circle (p &optional (radius 5))
  (if (listp p)
    (circle (getf p :x) (getf p :y) (or (getf p :radius) radius))
    (circle (vec-x p) (vec-y p) radius)))

(defun draw-square (p radius)
  (rect (- (vec-x p) radius)
        (- (vec-y p) radius)
        (* 2 radius)
        (* 2 radius)))

(defun draw-point (p)
  (point (vec-x p) (vec-y p)))

(defun oob-p (p &optional (r 0.0))
  (or (outsidep (- 0 r) (+ *width* r) (vec-x p))
      (outsidep (- 0 r) (+ *height* r) (vec-y p))))


(defsketch cm
    ((width *width*) (height *height*) (y-axis :down) (title "Coding Math 2D")
     (mouse (cons 0 0))
     ;; Data
     (o (make-particle 0 0 :radius 5))
     (p (make-particle 150.0 40.0 :radius 10))
     (delta -0.05)
     ;; Pens
     (particle-pen (make-pen :fill (gray 0.9) :stroke (gray 0.4)))
     (line-pen (make-pen :stroke (gray 0.7)))
     )
  (with-setup
    ;;
    (in-context
      (translate (/ *width* 2) (/ *height* 2))
      (with-pen particle-pen
        (draw-particle o)
        (draw-particle p))
      (let ((sin (sin delta))
            (cos (cos delta)))
        (psetf (particle-x p)
               (- (* (particle-x p) cos)
                  (* (particle-y p) sin))
               (particle-y p)
               (+ (* (particle-y p) cos)
                  (* (particle-x p) sin)))))
    ;;
    )
  )


;;;; Mouse
(defun mousemove (instance x y)
  (with-slots (dragging mouse) instance
    (setf (car mouse) x)
    (setf (cdr mouse) y)
    ;;
    ;;
    )
  )


(defun mousedown-left (instance x y)
  (declare (ignorable instance x y))
  )

(defun mousedown-right (instance x y)
  (declare (ignorable instance x y))
  )

(defun mouseup-left (instance x y)
  (declare (ignorable instance x y))
  )

(defun mouseup-right (instance x y)
  (declare (ignorable instance x y))
  )


(defmethod kit.sdl2:mousemotion-event ((window cm) ts b x y xrel yrel)
  (declare (ignore ts b xrel yrel))
  (mousemove window x y))

(defmethod kit.sdl2:mousebutton-event ((window cm) state ts button x y)
  (declare (ignore ts))
  (funcall (case state
             (:mousebuttondown
              (case button
                (1 #'mousedown-left)
                (3 #'mousedown-right)))
             (:mousebuttonup
              (case button
                (1 #'mouseup-left)
                (3 #'mouseup-right))))
           window x y))


;;;; Keyboard
(defun keydown (instance scancode)
  (declare (ignorable instance))
  (scancode-case scancode
    (:scancode-space (sketch::prepare instance))))

(defun keyup (instance scancode)
  (declare (ignorable instance))
  (scancode-case scancode
    (:scancode-space
     nil)))


(defmethod kit.sdl2:keyboard-event ((instance cm) state timestamp repeatp keysym)
  (declare (ignore timestamp repeatp))
  (cond
    ((eql state :keyup) (keyup instance (sdl2:scancode-value keysym)))
    ((eql state :keydown) (keydown instance (sdl2:scancode-value keysym)))
    (t nil)))


;;;; Run
; (defparameter *demo* (make-instance 'cm))