public void NextDouble()
{
// no params
int count = 30, minVal = 0, maxVal = 1;
var nums = new List <double>(ArrayBuilder.repeat(() => GlobalRandom.NextDouble(), count));
foreach (var num in nums)
{
Assert.IsTrue(num >= minVal && num < maxVal);
}
// count
nums = new List <double>(GlobalRandom.NextDoubleArr(count));
Assert.IsTrue(nums.Count == count);
foreach (var num in nums)
{
Assert.IsTrue(num >= minVal && num < maxVal);
}
// count, min, max
minVal = -2; maxVal = 2;
nums = new List <double>(GlobalRandom.NextDoubleArr(count, minVal, maxVal));
Assert.IsTrue(nums.Count == count);
foreach (var num in nums)
{
Assert.IsTrue(num >= minVal && num < maxVal);
}
}
public override void Update(UpdateEventArgs e)
{
this.asteroidChance = Math.Min(asteroidChanceMax, this.asteroidChance + (float)e.ElapsedTimeInS * asteroidChanceIncrease);
if (this.environment.Offset > firePlanetChanceThreshold)
{
this.fireplanetChance = GameMath.Clamp(firePlanetChanceInitial, firePlanetChanceMax, this.fireplanetChance + (float)e.ElapsedTimeInS * firePlanetChanceIncrease);
}
if (this.environment.Offset > repellingPlanetChanceThreshold)
{
this.repellingPlanetChance = GameMath.Clamp(repellingPlanetChanceInitial, repellingPlanetChanceMax, this.repellingPlanetChance + (float)e.ElapsedTimeInS * repellingPlanetChanceIncrease);
}
// Check for planets out of the screen
while (!this.planets.First.Value.IsOnScreen())
{
this.environment.RemoveWorldObject(this.planets.First.Value.ID);
if (this.planets.First.Value is FirePlanet)
{
this.fireplanetCount--;
}
if (this.planets.First.Value is RepellingPlanet)
{
this.repellingPlanetCount--;
}
this.environment.Planets.RemoveFirst();
}
// Check if spacecore is still visible
if (this.spacecore != null && this.spacecore.Position.X + 645 + LevelGenerator.SideBuffer < this.environment.Offset)
{
this.environment.RemoveWorldObject("spacecore");
this.spacecore = null;
}
// Always have at least a certain amount of planets on the playfield
if (this.planets.Count < minPlanets)
{
this.generatePlanet();
}
if (GlobalRandom.NextDouble() < this.asteroidChance)
{
this.generateAsteroid();
}
if (GlobalRandom.NextDouble() < spacecoreChance && this.spacecore == null)
{
this.generateSpacecore();
}
}
public static void OpenRandomWalls(this IEnumerable <GeneratingTile> tiles, Func <GeneratingTile, float> probability, float minOpen, float maxOpen)
{
foreach (var tile in tiles)
{
// ReSharper disable once AccessToForEachVariableInClosure
foreach (var direction in Helpers.activeDirections
.Where(d => GlobalRandom.NextDouble() < probability(tile)))
{
tile.OpenTileWall(direction, minOpen, maxOpen);
}
}
}
public static MatrixD Random(this MatrixBuilder <double> mb, int rows, int cols, double minVal, double maxVal)
{
var matrix = new double[rows, cols];
for (var i = 0; i < rows; i++)
{
for (var j = 0; j < cols; j++)
{
matrix[i, j] = GlobalRandom.NextDouble(minVal, maxVal);
}
}
return(MatrixD.Build.DenseOfArray(matrix));
}
private void generateSpacecore()
{
// y-coordinate
float y = 0;
do
{
y = (float)GlobalRandom.NextDouble(-345, 345);
} while (!this.checkPosition(y, 15));
this.spacecore = new Spacecore(this.environment, new Vector2(655 + SideBuffer + this.environment.Offset, y));
this.environment.AddWorldObject("spacecore", this.spacecore);
}
private void generateAsteroid()
{
// Random radius
float r = GameMath.Clamp(10, 18, (float)GlobalRandom.NormalDouble(14, 4));
// y-coordinate
float y = 0;
do
{
y = (float)GlobalRandom.NextDouble(-360 + r, 360 - r);
} while (!this.checkPosition(y, r));
this.environment.AddAsteroid(new Vector2(640 + SideBuffer + r + this.environment.Offset, y), r);
}
private void generatePlanet()
{
// Random radius
float r = GameMath.Clamp(10, 80, (float)GlobalRandom.NormalDouble(45, 10));
// y-coordinate
float y = 0;
do
{
y = (float)GlobalRandom.NextDouble(-360 + r, 360 - r);
} while (!this.checkPosition(y, r));
this.environment.AddPlanet(this.selectFactory(), new Vector2(640 + SideBuffer + r + this.environment.Offset, y), r);
}
private IPlanetFactory selectFactory()
{
double a = GlobalRandom.NextDouble();
if (a < this.fireplanetChance && this.fireplanetCount < 2 * minPlanets * this.fireplanetChance)
{
return(new FirePlanetFactory());
}
else if (a < this.repellingPlanetChance + this.fireplanetChance && this.repellingPlanetCount < 2 * minPlanets * this.repellingPlanetChance)
{
return(new RepellingPlanetFactory());
}
else
{
return(new OrdinaryPlanetFactory());
}
}
public void start()
{
var inputs = new double[countIns][];
var outputs = new double[countIns][];
for (var i = 0; i < countIns; i++)
{
inputs[i] = new double[] { GlobalRandom.NextDouble(-100, 100) };
outputs[i] = new double[] { func(inputs[i][0]) };
}
var ins = MatrixD.Build.DenseOfRowArrays(inputs);
var outs = MatrixD.Build.DenseOfRowArrays(outputs);
var nn = new net11Builder().build();
nn.train(ins, outs, iterations, batchSize);
}
public void backwardLearn()
{
var learnRate = GlobalRandom.NextDouble();
int inSize, outSize;
var countExamples = 3;
inSize = outSize = 5;
var input = MatrixD.Build.Random(countExamples, inSize);
var layer = new BiasLayer(inSize);
var nextGradients = MatrixD.Build.Random(countExamples, outSize);
var expectedBiases = layer.Biases.ShallowCopy();
var gradientSums = nextGradients.ColumnSums().AsArray();
for (int i = 0; i < expectedBiases.Length; i++)
{
expectedBiases[i] -= learnRate * gradientSums[i];
}
layer.backwardLearn(input, nextGradients, learnRate);
Assert.IsTrue(expectedBiases.EEquals(layer.Biases));
}
