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flight-sim
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place many objects in the world

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Dan Ballard 2011-07-17 16:58:22 -07:00
parent 148d065f65
commit b6589962ce
1 changed files with 81 additions and 59 deletions
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114
flight-sim.lisp
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@ -28,14 +28,19 @@
arr))
(defclass model ()
((vertices :initarg :vertices :accessor vertices :initform (make-array 0))
(faces :initarg :faces :accessor faces :initform (make-array 0))))
((vertices :initarg :vertices :accessor vertices :initform (vector))
(faces :initarg :faces :accessor faces :initform (vector))))
(defclass motion ()
((velocities :initarg :velocities :accessor velocities :initform (vector 0 0 0))
(angles :initarg :angles :accessor angles :initform (vector 0 0 0))))
(defclass game-object ()
((model :initarg :model :accessor model :initform (make-instance 'model))
(coords :initarg :coords :accessor coords :initform (make-array 3 :initial-contents '(0 0 0)))
(angle :initarg :angle :accessor angle :initform 0)
(r-vector :initarg :r-vector :accessor r-vector :initform (make-array 3 :initial-contents '(0 0 0)))))
(motion :initarg :motion :accessor motion :initform (make-instance 'motion))
(coords :initarg :coords :accessor coords :initform (vector 0 0 0))
(angles :initarg :angles :accessor angles :initform (vector 0 0 0))))
(defparameter *diamond-model*
@ -44,18 +49,21 @@
(-0.5 0 0.5) (-0.5 0 -0.5) (0.0 -1 0)))
:faces (make-2d-array 8 3 '((0 3 1) (0 2 4) (0 1 2) (0 4 3)
(3 5 1) (2 5 4) (1 5 2) (4 5 3)))))
(defparameter *diamond*
(make-instance 'game-object
:model *diamond-model*
:coords (make-array 3 :initial-contents
'(0 0 -3))
:angle 0
:r-vector (make-array 3 :initial-contents '(0 1 0))))
:coords (vector 0 0 -3)
:angles (vector 0 0 0)))
(defparameter *origin* (make-array 3 :initial-contents '(0 0 -7)))
(defparameter *orientation* (make-array 3 :initial-contents '(0 1 0)))
(defparameter *world* nil)
(defparameter *velocity* 1) ; 1 unit / second
(defparameter *origin* (vector 0 0 -7))
(defparameter *orientation* (vector 0 1 0))
(defparameter *velocity* 2) ; 1 unit / second
(defparameter *controls-active* '())
(let ((time-units (/ 1.0 internal-time-units-per-second)))
@ -87,6 +95,7 @@
(/ (+ (* (sin (+ (* 0.3 time) (* 4/3 PI))) 127) 128) 255)))
;; returns a real lisp 2d array
(defun make-rotation-matrix (xa ya za)
(let ((sxa (sin xa))
(cxa (cos xa))
@ -160,39 +169,23 @@
(let ((v (aref tri 2)))
(gl:vertex (aref v 0) (aref v 1) (aref v 2)))))
(defun draw ()
"draw a frame"
(let* ((start-time (wall-time))
(time (- start-time *last-time*)))
(gl:clear :color-buffer-bit)
;(gl:load-identity)
(loop for key in *controls-active* do
(case key
((:sdl-key-w) ; + z
(incf (aref *origin* 2) (* time *velocity*)))
((:sdl-key-s) ; - z
(decf (aref *origin* 2) (* time *velocity*)))
(otherwise (format t "~a~%" key))))
(defun draw (time)
;; clear the buffer
(gl:clear :color-buffer-bit :depth-buffer-bit)
;; move to eye position
(gl:translate (aref *origin* 0) (aref *origin* 1) (aref *origin* 2)) ;; eye
;(gl:translate 0 -2 -10)
;(gl:rotate 22 1 0 0)
;;; draw a triangle
(setf (coords *diamond*) (rotate* (make-rotation-matrix 0 (- (wall-time) *last-time*) 0) (coords *diamond*)))
(incf (angle *diamond*) (* 120 time))
(loop for entity across *world* do
;(let ((entity (aref *world* i)))
(progn
(gl:push-matrix)
;(gl:load-identity)
(gl:translate (aref (coords *diamond*) 0) (aref (coords *diamond*) 1) (aref (coords *diamond*) 2))
(gl:rotate (angle *diamond*) (aref (r-vector *diamond*) 0) (aref (r-vector *diamond*) 1) (aref (r-vector *diamond*) 2))
(loop for face across (faces (model *diamond*)) do
(draw-triangle (get-vertecies face (vertices (model *diamond*))) time))
(gl:translate (aref (coords entity) 0) (aref (coords entity) 1) (aref (coords entity) 2))
(gl:rotate (aref (angles entity) 0) 1 0 0)
(gl:rotate (aref (angles entity) 1) 0 1 0)
(gl:rotate (aref (angles entity) 2) 0 0 1)
(loop for face across (faces (model entity)) do
(draw-triangle (get-vertecies face (vertices (model entity))) time))
(gl:pop-matrix)
))
(gl:matrix-mode :modelview)
(gl:load-identity)
@ -206,7 +199,24 @@
;; finish the frame
(gl:flush)
(sdl:update-display)
(sdl:update-display))
(defun sim-step ()
"draw a frame"
(let* ((start-time (wall-time))
(time (- start-time *last-time*)))
(loop for key in *controls-active* do
(case key
((:sdl-key-w) ; + z
(incf (aref *origin* 2) (* time *velocity*)))
((:sdl-key-s) ; - z
(decf (aref *origin* 2) (* time *velocity*)))
(otherwise (format t "~a~%" key))))
(draw time)
(incf *num-frames*)
(if (not (eql (floor *last-time*) (floor time)))
@ -219,12 +229,13 @@
(setf *last-time* start-time)))
(defun reshape ()
(gl:shade-model :smooth)
(gl:clear-color 0 0 0 0)
(gl:clear-depth 1)
; (gl:enable :depth-test)
; (gl:depth-func :lequal)
(gl:enable :depth-test)
(gl:depth-func :lequal)
(gl:enable :cull-face)
(gl:hint :perspective-correction-hint :nicest)
@ -245,12 +256,23 @@
)
(defun populate-world ()
(setf *world*
(make-array 10 :initial-contents
(loop for i from 0 to 9 collecting
(make-instance 'game-object
:model *diamond-model*
:coords (vector (- (random 10) 5) (- (random 10) 5) (- (random 10) 5))
:angles (vector (random 360) (random 360) (random 360)))))))
(defun init ()
(setf *start-time* (wall-time))
(setf *num-frames* 0)
(setf *last-time* *start-time*)
(setf *controls-active* '())
; (reshape)
(populate-world)
)
(defun main-loop ()
@ -272,5 +294,5 @@
;; (something similar might help in some other lisps, not sure which though)
#+(and sbcl (not sb-thread)) (restartable
(sb-sys:serve-all-events 0))
(restartable (draw))))))
(restartable (sim-step))))))
;(draw)))))