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));
}
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
}));
}