/// <summary>
/// Rotates the Polygon12 by a given angle in radians
/// </summary>
/// <param name="centerOfRotation"></param>
/// <param name="angleInRadians"></param>
public void rotatePolygon12(Vector2 centerOfRotation, float angleInRadians)
{
for (int i = 0; i < numOfPoints; i++)
{
point[i] = Util.rotatePoint(point[i], centerOfRotation, -angleInRadians);
}
}
/// <summary>
/// Rotates the rect4 by a given angle in radians
/// </summary>
/// <param name="centerOfRotation"></param>
/// <param name="angleInRadians"></param>
public void rotateRect(Vector2 centerOfRotation, float angleInRadians)
{
point[0] = Util.rotatePoint(point[0], centerOfRotation, -angleInRadians);
point[1] = Util.rotatePoint(point[1], centerOfRotation, -angleInRadians);
point[2] = Util.rotatePoint(point[2], centerOfRotation, -angleInRadians);
point[3] = Util.rotatePoint(point[3], centerOfRotation, -angleInRadians);
}
/// <summary>
/// Draw a line circle
/// </summary>
/// <param name="sb"></param>
/// <param name="c"></param>
/// <param name="center"></param>
/// <param name="radius"></param>
/// <param name="sides"></param>
/// <param name="xScale"></param>
static public void drawCircle(SpriteBatch sb, Color c, Vector2 center, float radius, int sides, float xScale)
{
Vector2 p = new Vector2(center.X, center.Y + radius);
Vector2 prev = new Vector2(0, 0);
for (int i = 0; i <= sides; i++)
{
Vector2 pp = Util.rotatePoint(p, center, (float)(Math.PI * 2 / (sides - 1) * i));
if (i != 0)
{
drawLine(sb, c, pp, prev, 0);
}
prev = pp;
}
}
public Polygon12(Vector2 center, int sides, float radius, float initialAngleRadians)
{
Vector2 p = new Vector2(center.X, center.Y + radius);
Vector2 prev = new Vector2(0, 0);
point = new Vector2[maxNumOfPoints];
numOfPoints = sides;
for (int i = 0; i < sides; i++)
{
Vector2 pp = Util.rotatePoint(p, center, (float)(Math.PI * 2 / (sides) * i) + initialAngleRadians);
point[i].X = pp.X;
point[i].Y = pp.Y;
prev = pp;
}
}
