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(in-package #:l-system-examples)
(deflsys f (n)
(let* ((r0 0.5235988)
(n0 (* 1.01 n)))
`((f ,(* 1.11 n0))
([)
(+ ,r0)
(f ,(* 0.89 n0))
(])
([)
(- ,r0)
(f ,(* 0.89 n0))
(])
([)
(/ ,r0)
(f ,(* 0.89 n0))
(])
([)
(q ,r0)
(f ,(* 0.89 n0))
(])
(f ,(* 1.11 n0))
([)
(+ ,r0)
(f ,(* 0.89 n0))
(])
([)
(- ,r0)
(f ,(* 0.89 n0))
(])
([)
(/ ,r0)
(f ,(* 0.89 n0))
(])
([)
(q ,r0)
(f ,(* 0.89 n0))
(])
(f ,(* 1.11 n0)))))
(deflsys + (n)
`((+ ,(+ 0.1 n))))
(deflsys - (n)
`((- ,(+ 0.1 n))))
;; Rest
(defclass test-window (gl-window)
((start-time :initform (get-internal-real-time))
(frames :initform 0)
(dt :initform 0)
(rotate :initform 0.0)
(view-matrix :initform (kit.glm:perspective-matrix 50.0 1.1 1.0 800.0))
(vao :initform nil)
(programs :initform nil)))
(defmethod initialize-instance :after ((w test-window)
&key shaders &allow-other-keys)
(setf (idle-render w) t)
(gl:viewport 0 0 800 600)
(with-slots (vao programs) w
(let* ((data
;;convert list of vecs to array
(list-of-vectors->list
;;make list of vecs
(turtle-system
;;Specific geometry for symbol f
#'(lambda (o n list)
(cube o n))
;;make structure of turtle commands
(l-system '((f 1.0)) 3))))
(length (length data))
(array (make-array length
:element-type 'single-float
:initial-contents data)))
(setf programs (compile-shader-dictionary shaders))
(setf vao
(make-instance 'vao
:type 'vertex-3d
:primitive :triangles
:vertex-count (/ length 3)))
(vao-buffer-vector vao 0 (* 4 length) array)
(vao-buffer-vector vao 1 (* 4 length) array))))
;;; Rest
(defmethod render ((window test-window))
(with-slots (view-matrix vao programs rotate) window
(gl:clear-color 0.0 0.0 1.0 1.0)
(gl:clear :color-buffer)
(use-program programs :vertex-color)
(uniform-matrix programs :view-m 4 (vector
(sb-cga:matrix*
view-matrix
(kit.glm:look-at
(sb-cga:vec 0.0 0.0 200.0)
(sb-cga:vec 0.0 10.0 0.0)
(sb-cga:vec 0.0 -1.0 0.0))
(sb-cga:rotate* 0.0
(incf rotate 0.00625)
0.0))))
(vao-draw vao)))
(defmethod render :after ((window test-window))
(with-slots (start-time frames rotate) window
(incf frames)
(let* ((current-time (get-internal-real-time))
(seconds (/ (- current-time start-time) internal-time-units-per-second)))
(when (> seconds 5)
(format t "FPS: ~A~%" (float (/ frames seconds)))
(setf frames 0)
(setf start-time (get-internal-real-time))))))
(defun start-example ()
(kit.sdl2:start)
(sdl2:in-main-thread ()
(sdl2:gl-set-attr :context-major-version 3)
(sdl2:gl-set-attr :context-minor-version 3))
(make-instance 'test-window :shaders 'vao-color.programs.330))
(defvao vertex-3d ()
(:separate ()
(vertex :float 3)
(color :float 3)))
(defdict vao-color.programs.330 ()
(program :vertex-color (:view-m)
(:vertex-shader "
#version 330
uniform mat4 view_m;
layout (location = 0) in vec3 vertex;
layout (location = 1) in vec3 color;
smooth out vec3 f_color;
void main() {
gl_Position = view_m * vec4(vertex, 1.0);
f_color = color;
}
")
(:fragment-shader "
#version 330
smooth in vec3 f_color;
out vec4 f_out;
void main() {
f_out = vec4(f_color,
1.0);
}
")))
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