protected void InitializeMatrices()
{
scaleMatrix = Matrix.Scaling(new Vector3(scale, 0f));
positionMatrix = Matrix.Translation(new Vector3(position, 0));
originMatrix = Matrix.Translation(new Vector3(-origin, 0));
rotationMatrix = Matrix.RotationZ(MathUtil.DegreesToRadians(degrees));
}
private PolygonPoint GetPoint(float degrees, float radius)
{
float radAngle = MathUtil.DegreesToRadians(degrees) - MathUtil.PiOverTwo;
double x = Math.Cos(radAngle) * radius;
double y = Math.Sin(radAngle) * radius;
return(new PolygonPoint(x, y));
}
public PTriangle(Vector2 a, float lengthAB, float angleB, uint thickness) : base(thickness)
{
if (angleB >= 180)
{
throw new ArgumentException("Angle cannot be greater than or equal to 180.");
}
this.position = a;
this.a = a;
this.b = new Vector2(a.X + lengthAB, a.Y);
this.c = b + RadianToVector(MathUtil.DegreesToRadians(angleB) - MathUtil.PiOverTwo) * lengthAB;
}
internal override List <PolygonPoint> GetPoints(float thickness = 0)
{
List <PolygonPoint> points = new List <PolygonPoint>();
float degreeStep = 360f / sides;
float r = radius - thickness;
for (int i = 0; i < sides; i++)
{
float radAngle = MathUtil.DegreesToRadians(degreeStep * i);
double x = Math.Cos(radAngle) * r;
double y = Math.Sin(radAngle) * r;
points.Add(new PolygonPoint(x, y));
}
if (!Filled)
{
points.Add(points[0]);
}
return(points);
}
