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BounceBenchmark.scala
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BounceBenchmark.scala
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/* This code is based on the SOM class library.
*
* Copyright (c) 2001-2016 see AUTHORS.md file
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the 'Software'), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package bounce
import benchmarks.{BenchmarkRunningTime, ShortRunningTime}
import som.Random
class BounceBenchmark extends benchmarks.Benchmark[Int] {
private class Ball(random: Random) {
private var x: Int = random.next() % 500
private var y: Int = random.next() % 500
private var xVel: Int = (random.next() % 300) - 150
private var yVel: Int = (random.next() % 300) - 150
def bounce(): Boolean = {
val xLimit: Int = 500
val yLimit: Int = 500
var bounced = false
x += xVel;
y += yVel;
if (x > xLimit) {
x = xLimit; xVel = 0 - Math.abs(xVel); bounced = true;
}
if (x < 0) { x = 0; xVel = Math.abs(xVel); bounced = true; }
if (y > yLimit) {
y = yLimit; yVel = 0 - Math.abs(yVel); bounced = true;
}
if (y < 0) { y = 0; yVel = Math.abs(yVel); bounced = true; }
bounced
}
}
override val runningTime: BenchmarkRunningTime = ShortRunningTime
override def run(): Int = {
val random = new Random()
val ballCount = 100
var bounces = 0
val balls = Array.fill(ballCount)(new Ball(random))
(0 to 49).foreach { i =>
balls.foreach { ball =>
if (ball.bounce()) {
bounces += 1
}
}
}
bounces
}
override def check(result: Int): Boolean =
result == 1331
}