//Draw Polygon to Grid
public void DrawPolygon(GridContext bgc, PenTwist twistType, int x, int y, int z, int radius, int sides)
{
double angleSize = 360.0 / sides;
for (int i = 0; i < sides; i++)
{
double vx1 = radius;
double vy1 = 0;
var angle1 = (int)(i * angleSize);
MathTrigonometry.RotateZ(-angle1, ref vx1, ref vy1);
double vx2 = radius;
double vy2 = 0;
var angle2 = (int)((i + 1) * angleSize);
MathTrigonometry.RotateZ(-angle2, ref vx2, ref vy2);
if (i == sides - 1) //connect last segment
{
vx2 = radius;
vy2 = 0;
}
DrawAxisLine2D(bgc, twistType, x + (int)vx1, y + (int)vy1, x + (int)vx2, y + (int)vy2, z);
}
}
//Draw an Arc to Grid
public void DrawArc(GridContext bgc, PenTwist twistType, int x, int y, int z, int radius, int startAnglePercent, int stopAnglePercent)
{
var realStartAngle = (int)(startAnglePercent * 3.6);
var realStopAngle = (int)(stopAnglePercent * 3.6);
for (int angle = realStartAngle; angle < realStopAngle; angle++)
{
double vx = radius;
double vy = 0;
MathTrigonometry.RotateZ(-angle, ref vx, ref vy);
DrawAxisPen(bgc, twistType, x + (int)vx, y + (int)vy, z);
}
}
//Transform:RotateZ in degrees not radians
public void RotateZ(float angle)
{
float x1 = Vertex1[0];
float y1 = Vertex1[1];
float x2 = Vertex2[0];
float y2 = Vertex2[1];
float x3 = Vertex3[0];
float y3 = Vertex3[1];
MathTrigonometry.RotateZ(angle, ref x1, ref y1);
MathTrigonometry.RotateZ(angle, ref x2, ref y2);
MathTrigonometry.RotateZ(angle, ref x3, ref y3);
CalcNormal();
Vertex1[0] = x1; Vertex1[1] = y1;
Vertex2[0] = x2; Vertex2[1] = y2;
Vertex3[0] = x3; Vertex3[1] = y3;
}
public static void RotateZ(float angle, ref float x, ref float y)
{
MathTrigonometry.RotateZ(angle, ref x, ref y);
}