public void AxialToPoint()
{
HexGrid grid = new HexGrid( 2f );
float hexRadius = grid.HexRadius;
Vec2D point = grid.AxialToPoint( new AxialHexCoord( 10, 10 ) );
float xExpected = hexRadius * SQRT_3 * ( 10 + 10 / 2 );
float yExpected = hexRadius * ( 3f / 2f ) * 10;
Assert.That( point.x, Is.InRange<float>( xExpected - EPSILON, xExpected + EPSILON ) );
Assert.That( point.y, Is.InRange<float>( yExpected - EPSILON, yExpected + EPSILON ) );
}
static void Main( string[] args )
{
//FloatCubic floatCubic = new FloatAxial( -0.01f, -1f ).ToFloatCubic();
//CubicHexCoord rounded = floatCubic.Round();
//AxialHexCoord axial = rounded.ToAxial();
HexGrid grid = new HexGrid( 2f );
float offset = 0.5f * grid.HexRadius;
//grid.PointToDirectionInHex( new Vec2D( 0f, 0f ) );
grid.PointToDirectionInHex( new Vec2D( 0.10f, 0.10f ) );
grid.PointToDirectionInHex( new Vec2D( -0.10f, -0.10f ) );
grid.PointToDirectionInHex( new Vec2D( 0f, 0f ) );
grid.PointToDirectionInHex( new Vec2D( 0.99f, 1.00f ) );
grid.PointToDirectionInHex( new Vec2D( -0.99f, -1.00f ) );
}
public void OffsetToPoint()
{
HexGrid grid = new HexGrid( 2f );
float hexRadius = grid.HexRadius;
// Test an even row hex
Vec2D point = grid.OffsetToPoint( new OffsetHexCoord( 10, 10 ) );
float xExpected = hexRadius * SQRT_3 * 10;
float yExpected = hexRadius * ( 3f / 2f ) * 10;
Assert.That( point.x, Is.InRange<float>( xExpected - EPSILON, xExpected + EPSILON ) );
Assert.That( point.y, Is.InRange<float>( yExpected - EPSILON, yExpected + EPSILON ) );
// Text an odd row hex
point = grid.OffsetToPoint( new OffsetHexCoord( 10, 11 ) );
xExpected = hexRadius * SQRT_3 * ( 10 + 0.5f );
yExpected = hexRadius * ( 3f / 2f ) * 11;
Assert.That( point.x, Is.InRange<float>( xExpected - EPSILON, xExpected + EPSILON ) );
Assert.That( point.y, Is.InRange<float>( yExpected - EPSILON, yExpected + EPSILON ) );
}
public void PointToCubic()
{
HexGrid grid = new HexGrid( 3f );
float hexRadius = grid.HexRadius;
CubicHexCoord cubic = grid.PointToCubic( new Vec2D( 10f, 10f ) );
float rExpected = 10f / ( ( 3f / 2f ) * hexRadius );
float qExpected = 10f / ( SQRT_3 * hexRadius * ( 1f + 0.5f * rExpected ) );
Console.WriteLine( "Axial: q: " + qExpected + ", r: " + rExpected );
float xExpected = qExpected;
float zExpected = rExpected;
float yExpected = -xExpected - zExpected;
Console.WriteLine( "Cubic: x: " + xExpected + ", y: " + yExpected + ", z: " + zExpected );
// Now that I'm close enough to guess, I'll just do that rather than trying to emulate
// the rounding all the way through. Not accurate, but good enough for government work.
Assert.That( cubic.x, Is.EqualTo( 1 ) );
Assert.That( cubic.y, Is.EqualTo( -3 ) );
Assert.That( cubic.z, Is.EqualTo( 2 ) );
}
public void PointToDirectionInHex()
{
HexGrid grid = new HexGrid( 2f );
Vec2D hexPos = grid.AxialToPoint( new AxialHexCoord( 10, 10 ) );
float offset = 0.5f * grid.HexRadius;
Vec2D[] points = new Vec2D[ 12 ] {
new Vec2D( hexPos.x + offset, hexPos.y + 0f * offset - 0.01f ), // 0a
new Vec2D( hexPos.x + offset, hexPos.y + 0f * offset + 0.01f ), // 0b
new Vec2D( hexPos.x + offset, hexPos.y + 1f * offset - 0.01f ), // 1a
new Vec2D( hexPos.x + offset, hexPos.y + 1f * offset + 0.01f ), // 1b
new Vec2D( hexPos.x - offset, hexPos.y + 1f * offset + 0.01f ), // 2a
new Vec2D( hexPos.x - offset, hexPos.y + 1f * offset - 0.01f ), // 2b
new Vec2D( hexPos.x - offset, hexPos.y + 0f * offset + 0.01f ), // 3a
new Vec2D( hexPos.x - offset, hexPos.y + 0f * offset - 0.01f ), // 3b
new Vec2D( hexPos.x - offset, hexPos.y - 1f * offset + 0.01f ), // 4a
new Vec2D( hexPos.x - offset, hexPos.y - 1f * offset - 0.01f ), // 4b
new Vec2D( hexPos.x + offset, hexPos.y - 1f * offset - 0.01f ), // 5a
new Vec2D( hexPos.x + offset, hexPos.y -1f * offset + 0.01f ) // 5b
};
DirectionEnum[] results = new DirectionEnum[ 12 ];
for ( int i = 0; i < points.Length; i++ )
{
results[ i ] = grid.PointToDirectionInHex( points[ i ] );
}
Assert.That( results, Is.EquivalentTo( new DirectionEnum[ 12 ] {
DirectionEnum.E, // 0a
DirectionEnum.E, // 0b
DirectionEnum.SE, // 1a
DirectionEnum.SE, // 1b
DirectionEnum.SW, // 2a
DirectionEnum.SW, // 2b
DirectionEnum.W, // 3a
DirectionEnum.W, // 3b
DirectionEnum.NW, // 4a
DirectionEnum.NW, // 4b
DirectionEnum.NE, // 5a
DirectionEnum.NE // 5b
} ) );
}
public void ConstructorHexRadius()
{
HexGrid grid = new HexGrid( 2f );
Assert.That( grid.HexRadius, Is.EqualTo( 2f ) );
}
public void PropertySlice()
{
HexGrid grid = new HexGrid( 2f );
float hexRadius = grid.HexRadius;
Vec2D slice = grid.Slice;
float xExpected = 0.5f * SQRT_3 * hexRadius;
float yExpected = 0.5f * hexRadius;
Assert.That( slice.x, Is.InRange<float>( xExpected - EPSILON, xExpected + EPSILON ) );
Assert.That( slice.y, Is.InRange<float>( yExpected - EPSILON, yExpected + EPSILON ) );
}
public void PropertyHexRadius()
{
float hexRadius = new HexGrid( 2f ).HexRadius;
Assert.That( hexRadius, Is.EqualTo( 2f ) );
}