private static void CreateCircle()
{
Drawable.Drawables.Remove(circleLine);
float radius = Math.Max(MapDimensions.X, MapDimensions.Z);
double theta = 2.0f * Math.PI * 0 / CIRCLE_SEGMENTS;
Vector3[] polygons = new Vector3[CIRCLE_SEGMENTS];
for (int i = 0; i < CIRCLE_SEGMENTS; i++)
{
theta = 2.0f * Math.PI * i / CIRCLE_SEGMENTS;
float x = radius * (float)Math.Cos(theta);
float z = radius * (float)Math.Sin(theta);
polygons[i] = new Vector3(x, 0, z);
}
circleLine = new LineLoop(polygons, COLOR_CIRCLE, 2);
}
private static void CreateGrid(bool polar = false)
{
Drawable.Drawables = Drawable.Drawables.Except(gridLines).ToList();
gridLines.Clear();
if (!polar)
{
for (float x = -MapDimensions.X; x <= MapDimensions.X; x += MapDimensions.X / 20)
{
Vector3 start = new Vector3(x, 0, -MapDimensions.Z);
Vector3 end = new Vector3(x, 0, MapDimensions.Z);
Line line = new Line(start, end, COLOR_GRID);
gridLines.Add(line);
}
for (float z = -MapDimensions.Z; z <= MapDimensions.Z; z += MapDimensions.Z / 20)
{
Vector3 start = new Vector3(-MapDimensions.X, 0, z);
Vector3 end = new Vector3(MapDimensions.X, 0, z);
Line line = new Line(start, end, COLOR_GRID);
gridLines.Add(line);
}
}
else
{
float radius = Math.Max(MapDimensions.X, MapDimensions.Z);
//Lines
double angleDelta = Math.PI / POLAR_LINES;
double angle = 0;
float width = 1;
for (int i = 0; i < POLAR_LINES; i++)
{
float startX = (float)Math.Cos(angle) * radius;
float startZ = (float)Math.Sin(angle) * radius;
Vector3 start = new Vector3(startX, 0, startZ);
float endX = (float)Math.Cos(angle + Math.PI) * radius;
float endZ = (float)Math.Sin(angle + Math.PI) * radius;
Vector3 end = new Vector3(endX, 0, endZ);
if (i == 0 || i == POLAR_LINES / 2)
{
width = 1.6f;
}
else
{
width = 1;
}
Line line = new Line(start, end, COLOR_GRID, width);
gridLines.Add(line);
angle += angleDelta;
}
//Circles
float circleRadius = 0;
float circleRadiusDelta = radius / POLAR_CIRCLES;
for (int n = 0; n < POLAR_CIRCLES; n++)
{
double theta = 0;
Vector3[] polygons = new Vector3[POLAR_CIRCLE_SEGMENTS];
for (int i = 0; i < POLAR_CIRCLE_SEGMENTS; i++)
{
theta = 2.0f * Math.PI * i / POLAR_CIRCLE_SEGMENTS;
float x = circleRadius * (float)Math.Cos(theta);
float z = circleRadius * (float)Math.Sin(theta);
polygons[i] = new Vector3(x, 0, z);
}
LineLoop line = new LineLoop(polygons, COLOR_GRID);
gridLines.Add(line);
circleRadius += circleRadiusDelta;
}
}
}