public static NPoint Rotate(NPoint point, RtDirection direction) // A clockwise rotation matrix in the screen coordinate system
{
int a01 = (direction == RtDirection.Clockwise) ? -1 : 1; // (a00, a01) = (cos(pi/2), -sin(pi/2))
int a10 = (direction == RtDirection.Clockwise) ? 1 : -1; // (a10, a11) = (sin(pi/2), cos(pi/2))
int tx = point.x;
point.x = a01 * point.y;
point.y = a10 * tx;
return(point);
}
public static NPoint Move(NPoint point, Direction direction)
{
switch (direction)
{
case Direction.Left:
point.x -= 1;
break;
case Direction.Right:
point.x += 1;
break;
case Direction.Down:
point.y += 1;
break;
}
return(point);
}
public static NPoint Move(NPoint point, Direction direction)
{
switch (direction) {
case Direction.Left:
point.x -= 1;
break;
case Direction.Right:
point.x += 1;
break;
case Direction.Down:
point.y += 1;
break;
}
return point;
}
public static void Rotate(NPoint[] points, RtDirection direction)
{
for (int i = 0; i < points.Length; i++) {
Rotate(ref points[i], direction);
}
}
public static void Rotate(ref NPoint point, RtDirection direction)
{
point = Rotate(point, direction);
}
public static NPoint Rotate(NPoint point, RtDirection direction)
{
// A clockwise rotation matrix in the screen coordinate system
int a01 = (direction == RtDirection.Clockwise) ? -1 : 1; // (a00, a01) = (cos(pi/2), -sin(pi/2))
int a10 = (direction == RtDirection.Clockwise) ? 1 : -1; // (a10, a11) = (sin(pi/2), cos(pi/2))
int tx = point.x;
point.x = a01 * point.y;
point.y = a10 * tx;
return point;
}
public static void Move(NPoint[] points, Direction direction)
{
for (int i = 0; i < points.Length; i++) {
Move(ref points[i], direction);
}
}
public static void Move(ref NPoint point, Direction direction)
{
point = Move(point, direction);
}
public Piece(Field field, int x, int y, PcType type, PcColor? color= null)
{
this.Field = field;
this.pos = new NPoint(x, y);
this.Color = color ?? PC_CLRS[(int)type];
var PcShp = PC_SHPS[(int)type];
this.Shape = new NPoint[PcShp.Length];
PcShp.CopyTo(this.Shape, 0);
}
public static void Move(ref NPoint point, Direction direction)
{
point = Move(point, direction);
}
public static void Rotate(ref NPoint point, RtDirection direction)
{
point = Rotate(point, direction);
}
public void RotateTest()
{
var expected = new NPoint(-1 * target.y, 1 * target.x);
Rotator.Rotate(ref target, RtDirection.Clockwise);
Assert.AreEqual(expected, target);
}
public void BeginTestMethod()
{
target = new NPoint(2, 1);
}
