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core-transients.clj
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core-transients.clj
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(ns cjpb.core
(:require [clojure.math.numeric-tower :as math])
(:import [org.lwjgl LWJGLException BufferUtils]
[org.lwjgl.opengl Display DisplayMode GL11 GL15 GL20])
(:gen-class))
(set! *warn-on-reflection* true)
(set! *unchecked-math* true)
(def ^:const PRINT_FRAMES false)
(def ^:const SCREEN_WIDTH 800)
(def ^:const SCREEN_HEIGHT 600)
(def ^:const TITLE "ParticleBench")
(def ^:const ^double MIN_X -80.0)
(def ^:const ^double MAX_X 80.0)
(def ^:const ^double MIN_Y -90.0)
(def ^:const ^double MAX_Y 50.0)
(def ^:const ^double MIN_DEPTH 50.0)
(def ^:const ^double MAX_DEPTH 250.0)
(def ^:const ^double START_RANGE 15.0)
(def ^:const ^double START_X (+ MIN_X (/ (+ MIN_X MAX_X) 2) ) )
(def ^:const ^double START_Y MAX_Y)
(def ^:const ^double START_DEPTH (+ MIN_DEPTH (/ (+ MIN_DEPTH MAX_DEPTH) 2) ))
(def ^:const ^long POINTS_PER_SEC 2000)
(def ^:const ^double MAX_INIT_VEL 7.0)
(def ^:const ^long MAX_LIFE 4)
(def ^:const ^double MAX_SCALE 4.0)
(def ^:const ^double WIND_CHANGE 2.0)
(def ^:const ^double MAX_WIND 3.0)
(def ^:const ^double SPAWN_INTERVAL 0.01 )
(def ^:const ^long RUNNING_TIME (* MAX_LIFE 4) )
(def ^:const ^long MAX_PTS (* RUNNING_TIME POINTS_PER_SEC))
(def ^Long cur-frame (long 0))
(def frames (vec (repeat (* RUNNING_TIME 1000) 0)))
(def gpu-times (vec (repeat (* RUNNING_TIME 1000) 0)))
(def ^:const ^double grav 50.0)
(def ambient (vector-of :double 0.8 0.05 0.1 1.0))
(def diffuse (vector-of :double 1.0 1.0 1.0 1.0))
(def light-pos (vector-of :double (+ MIN_X (/ (- MAX_X MIN_X) 2) ) MAX_Y MIN_DEPTH 0.0))
(defrecord environ [^double windX ^double windY ^double windZ])
(defrecord timers [^double init-t ^double end-t ^double gpu-init-t ^double gpu-end-t
^double frame-dur ^double run-tmr ^double spwn-tmr])
(deftype pt [^double x ^double y ^double z ^double vx ^double vy ^double vz
^double R ^double life ^boolean is])
(defrecord state [^environ env ^timers tmrs ^clojure.lang.PersistentVector pts ^int cur-frame])
(defn init-state []
(->state (->environ (long -2.0) (double 0.0) (double -1.0))
(->timers (long 0) (long 0) (long 0) (long 0) (long 0) (double 0.0) (double 0.0)) [] (long 0)))
(defn render-pt [^pt apt]
(GL11/glPopMatrix)
(GL11/glPushMatrix)
(GL11/glTranslatef (double (.x apt)) (double (.y apt)) (double (- 0 (.z apt))) )
(GL11/glScalef (* (double (.R apt)) (double 2.0)) (* (double (.R apt)) (double 2.0)) (* (double (.R apt)) (double 2.0)) )
(GL11/glDrawArrays GL11/GL_QUADS (int 0) (int 24))
apt)
(defn make-pts [^clojure.lang.PersistentVector pts ^long num]
(let [t-pts (transient pts)]
(dotimes [not-used num]
(conj! t-pts (->pt
(- (+ (double 0.0) (* (double (rand)) START_RANGE)) (/ START_RANGE (double 2.0)) )
START_Y
(- (+ START_DEPTH (* (double (rand)) START_RANGE)) (/ START_RANGE (double 2.0)) )
(* (double (rand)) MAX_INIT_VEL)
(* (double (rand)) MAX_INIT_VEL)
(* (double (rand)) MAX_INIT_VEL)
(/ (* (double (rand)) MAX_SCALE ) (double 2.0))
(* (double (rand)) MAX_LIFE)
true)))
(persistent! t-pts)))
(defn spwn-pts [^double secs ^state state]
(let [^timers tmrs (:tmrs state) ^clojure.lang.PersistentVector pts (:pts state)]
(assoc state :pts
(if (> (:spwn-tmr tmrs) SPAWN_INTERVAL)
(make-pts pts (* SPAWN_INTERVAL POINTS_PER_SEC))
pts))))
(defn mov-pt [^double secs ^environ env ^pt apt]
(->pt
(+ ^double (.x apt) ^double (* ^double (.vx apt) secs))
(- ^double (+ (.y apt) ^double (* ^double (.vy apt) secs) ) (* grav secs))
(+ ^double (.z apt) ^double (* ^double (.vz apt) secs) )
(+ ^double (.vx apt) ^double (/ ^double (.windX env) ^double (.R apt)))
(+ ^double (.vy apt) ^double (/ ^double (.windY env) ^double (.R apt)))
(+ ^double (.vz apt) ^double (/ ^double (.windZ env) ^double (.R apt)))
^double (.R apt)
(- ^double (.life apt) secs)
(if (> (double 0.0) ^double (.life apt)) false true )))
(defn mov-pts [^double secs ^state state]
(let [^clojure.lang.PersistentVector pts (:pts state) ^environ env (:env state) ^clojure.lang.PersistentVector t-pts (transient pts)]
(dotimes [i (- (count pts) (long 1))]
(assoc! t-pts i ^pt (mov-pt secs env (nth pts i))))
(assoc state :pts (persistent! t-pts))))
(defn bind-pt [^pt apt]
(let [x (if (< (.x apt) MIN_X)
(+ MIN_X (.R apt))
(if (> (.x apt) MAX_X)
(- MAX_X (.R apt)) (.x apt)))
y (if (< (.y apt) MIN_Y)
(+ MIN_Y (.R apt))
(if (> (.y apt) MAX_Y)
(- MAX_Y (.R apt)) (.y apt)))
z (if (< (.z apt) MIN_DEPTH)
(+ MIN_DEPTH (.R apt))
(if (> (.z apt) MAX_DEPTH)
(- MAX_DEPTH (.R apt)) (.z apt)))
vx (if (or (< (.x apt) MIN_X) (> (.x apt) MAX_X)) (* (.vx apt) -1.1) (.vx apt))
vy (if (or (< (.y apt) MIN_Y) (> (.y apt) MAX_Y)) (* (.vy apt) -1.1) (.vy apt))
vz (if (or (< (.z apt) MIN_DEPTH) (> (.z apt) MAX_DEPTH)) (* (.vz apt) -1.1) (.vz apt))]
(->pt x y z vx vy vz (.R apt) (.life apt) (.is apt))))
(defn check-coll [^pt apt]
(if (or (< (.x apt) MIN_X) (> (.x apt) MAX_X)
(< (.y apt) MIN_Y) (> (.y apt) MAX_Y)
(< (.z apt) MIN_DEPTH) (> (.z apt) MAX_DEPTH))
(bind-pt apt)
apt))
(defn check-colls [^state state]
(let [t-pts (transient (:pts state))]
(dotimes [i (- (count t-pts) (int 1))]
(assoc! t-pts i (check-coll (nth t-pts i)) ))
(assoc state :pts (persistent! t-pts))))
(defn render-pts [^state state]
(let [pts (:pts state)]
(dotimes [i (- (count pts) (int 1))] (render-pt (nth pts i) ))
(Display/update)
state))
(def vertex-normal-array
(vector-of :float
-1.0 -1.0 1.0 0.0 0.0 1.0
1.0 -1.0 1.0 0.0 0.0 1.0
1.0 1.0 1.0 0.0 0.0 1.0
-1.0 1.0 1.0 0.0 0.0 1.0
-1.0 -1.0 -1.0 0.0 0.0 -1.0
-1.0 1.0 -1.0 0.0 0.0 -1.0
1.0 1.0 -1.0 0.0 0.0 -1.0
1.0 -1.0 -1.0 0.0 0.0 -1.0
-1.0 1.0 -1.0 0.0 1.0 0.0
-1.0 1.0 1.0 0.0 1.0 0.0
1.0 1.0 1.0 0.0 1.0 0.0
1.0 1.0 -1.0 0.0 1.0 0.0
-1.0 -1.0 -1.0 0.0 -1.0 0.0
1.0 -1.0 -1.0 0.0 -1.0 0.0
1.0 -1.0 1.0 0.0 -1.0 0.0
-1.0 -1.0 1.0 0.0 -1.0 0.0
1.0 -1.0 -1.0 1.0 0.0 0.0
1.0 1.0 -1.0 1.0 0.0 0.0
1.0 1.0 1.0 1.0 0.0 0.0
1.0 -1.0 1.0 1.0 0.0 0.0
-1.0 -1.0 -1.0 -1.0 0.0 0.0
-1.0 -1.0 1.0 -1.0 0.0 0.0
-1.0 1.0 1.0 -1.0 0.0 0.0
-1.0 1.0 -1.0 -1.0 0.0 0.0))
(defn load-cube-to-gpu []
(def vbo (GL15/glGenBuffers))
(GL15/glBindBuffer GL15/GL_ARRAY_BUFFER vbo)
(let [vertexPositions (BufferUtils/createFloatBuffer (count vertex-normal-array))]
(loop [i (count vertex-normal-array)]
(when (> i 0)
(. vertexPositions put (double (get vertex-normal-array (- (count vertex-normal-array) i))))
(recur (- i 1))))
(. vertexPositions rewind)
(GL15/glBufferData GL15/GL_ARRAY_BUFFER, vertexPositions, GL15/GL_STATIC_DRAW))
(GL11/glEnableClientState GL11/GL_VERTEX_ARRAY)
(GL11/glEnableClientState GL11/GL_NORMAL_ARRAY)
(GL11/glVertexPointer 3 GL11/GL_FLOAT (* 6 4) 0)
(GL11/glNormalPointer GL11/GL_FLOAT (* 6 4) (* 3 4))
(GL11/glMatrixMode GL11/GL_MODELVIEW))
(defn init []
(Display/setDisplayMode (new DisplayMode SCREEN_WIDTH SCREEN_HEIGHT))
(Display/setTitle TITLE)
(Display/create)
(GL11/glEnable GL11/GL_DEPTH_TEST)
(GL11/glEnable GL11/GL_LIGHTING)
(GL11/glClearColor 0.1 0.1 0.6 1.0)
(GL11/glClearDepth (int 1))
(GL11/glDepthFunc GL11/GL_LEQUAL)
;(GL11/glLight GL11/GL_LIGHT0 GL11/GL_AMBIENT ambient)
;(GL11/glLight GL11/GL_LIGHT0 GL11/GL_DIFFUSE diffuse)
;(GL11/glLight GL11/GL_LIGHT0 GL11/GL_POSITION light-pos)
(GL11/glEnable GL11/GL_LIGHT0)
(GL11/glViewport (int 0) (int 0) (int SCREEN_WIDTH) (int SCREEN_HEIGHT))
(GL11/glMatrixMode GL11/GL_PROJECTION)
(GL11/glLoadIdentity)
;(GL11/glFrustum -1 1 -1 1 1 1000)
(GL11/glFrustum (int -1) (int 1) (int -1) (int 1) (int 1) (int 1000))
(GL11/glRotatef (double 20.0) (double 1.0) (double 0.0) (double 0.0))
(GL11/glMatrixMode GL11/GL_MODELVIEW)
(GL11/glLoadIdentity)
(GL11/glPushMatrix))
(defn end[]
(Display/destroy))
(defmacro bind-wind-axis [getter env frame-dur] `(if (> (math/abs (~getter ~env)) MAX_WIND)
(* (~getter ~env) (double -0.5))
(+ (* (- (* (rand) WIND_CHANGE) (/ WIND_CHANGE (double 2.0)) ) ~frame-dur) (~getter ~env))))
(defn do-wind [^state state ^double frame-dur]
(let [^environ env (:env state)]
(assoc state :env
(->environ (bind-wind-axis :windX env frame-dur) (bind-wind-axis :windY env frame-dur) (bind-wind-axis :windZ env frame-dur)))))
(defn set-timer [^double tmr ^clojure.lang.PersistentVector pts] (def tmr (System/currentTimeMillis)) pts)
(defn filter-dead [^state state]
(let [pts (:pts state)]
(assoc state :pts (vec (filter (fn [^pt x] (.is x))
pts)))))
(defn main-loop [^state state prev-frame-length]
(let [init-t (System/currentTimeMillis) ^timers tmrs (:tmrs state)]
(GL11/glClear (bit-or GL11/GL_COLOR_BUFFER_BIT GL11/GL_DEPTH_BUFFER_BIT))
(let [^state state (->> (spwn-pts prev-frame-length state) (mov-pts prev-frame-length) (filter-dead) (check-colls) (render-pts))]
(let [gpu-init-t (System/currentTimeMillis)]
(let [gpu-end-t (System/currentTimeMillis)
end-t (System/currentTimeMillis)
frame-dur (/ (double ^long (- end-t init-t)) (double 1000.0))
run-tmr (+ ^double (:run-tmr tmrs) frame-dur)
spwn-tmr (+ ^double (:spwn-tmr tmrs) frame-dur)]
(if (>= run-tmr (/ MAX_LIFE (double 1000.0)) ) ( do
(def frames (assoc frames cur-frame frame-dur))
(def gpu-times (assoc gpu-times cur-frame (/ (double ^long (- gpu-end-t gpu-init-t)) (double 1000.0))))
(def ^long cur-frame (inc cur-frame))) false)
(if (< run-tmr RUNNING_TIME)
(let [^timer new-tmrs (->timers init-t end-t gpu-init-t gpu-end-t frame-dur run-tmr spwn-tmr)]
(recur (assoc (do-wind state frame-dur) :tmrs new-tmrs) frame-dur))
(do
(end)
(def mean-frame-time (/ (->> (take cur-frame frames) (reduce +)) cur-frame))
(def mean-gpu-time (/ (->> (take cur-frame gpu-times) (reduce +)) cur-frame))
(printf "Average framerate was: %.6f frames per second.\n", (double (/ 1 mean-frame-time)))
(printf "Average cpu time was- %.6f seconds per frame.\n", (double (- mean-frame-time mean-gpu-time)))
(if PRINT_FRAMES (do
(print "--:")
(dorun (map #(printf "%.6f," (double %)) (take cur-frame frames)))
(print ".--"))
false))))))))
(defn -main []
(init)
(load-cube-to-gpu)
(main-loop (init-state) (double 0.01) ))