public static void Rotate(NPoint[] points, RtDirection direction)
{
for (int i = 0; i < points.Length; i++)
{
Rotate(ref points[i], 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 bool Rotate(RtDirection direction)
{
Field.RemovePiece(this);
bool rotated = false;
if (canRotate(direction))
{
Rotator.Rotate(Shape, direction);
rotated = true;
}
Field.PutPiece(this);
Field.Draw();
return(rotated);
}
private bool canRotate(RtDirection direction)
{
int COLS = Field.COLS, ROWS = Field.ROWS;
foreach (NPoint pt in Shape)
{
var tpt = this.pos + Rotator.Rotate(pt, direction);
if (Field[tpt.x, tpt.y] != PcColor.None)
{
return(false);
}
}
return(true);
}
public bool RotatePiece(RtDirection direction)
{
bool rotated = piece.Rotate(direction);
return(rotated);
}
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;
}
private bool canRotate(RtDirection direction)
{
int COLS = Field.COLS, ROWS = Field.ROWS;
foreach (NPoint pt in Shape) {
var tpt = this.pos + Rotator.Rotate(pt, direction);
if (Field[tpt.x, tpt.y] != PcColor.None) {
return false;
}
}
return true;
}
public bool Rotate(RtDirection direction)
{
Field.RemovePiece(this);
bool rotated = false;
if (canRotate(direction)) {
Rotator.Rotate(Shape, direction);
rotated = true;
}
Field.PutPiece(this);
Field.Draw();
return rotated;
}
public static void Rotate(ref NPoint point, RtDirection direction)
{
point = Rotate(point, direction);
}
public bool RotatePiece(RtDirection direction)
{
bool rotated = piece.Rotate(direction);
return rotated;
}
