///////////////////////////////////////////
static Vec3 CalcPedestalUIDir()
{
// Get the angle from the center of the pedestal to the user's head,
// flatten it on the Y axis, and normalize it for angle calculations.
Vec3 dir = Input.Head.position - terrainPose.position;
dir = dir.XZ.Normalized.X0Y;
// Use a 'sticky' algorithm for updating the angle of the UI. We snap
// to increments of 60 degrees, but only do it after we've traveled
// 20 degrees into the next increment. This prevents the UI from
// moving back and forth when the user is wiggling around at the edge
// of a snap increment.
const float snapAngle = 60;
const float stickyAmount = 20;
float angle = dir.XZ.Angle();
if (SKMath.AngleDist(angle, uiAngle) > snapAngle / 2 + stickyAmount)
{
uiAngle = (int)(angle / snapAngle) * snapAngle + snapAngle / 2;
}
// Turn the angle back into a direction we can use to position the
// pedestal
return(Vec3.AngleXZ(uiAngle));
}
bool TestAngleDist()
{
float angleDistA = SKMath.AngleDist(0, 359);
float angleDistB = SKMath.AngleDist(359, 0);
float angleDistC = SKMath.AngleDist(359, 720);
float angleDistD = SKMath.AngleDist(-60, 70);
float angleDistE = SKMath.AngleDist(-60, 140);
Log.Info($"AngleDist 0 to 359: {angleDistA}");
Log.Info($"AngleDist 359 to 0: {angleDistB}");
Log.Info($"AngleDist 359 to 720: {angleDistC}");
Log.Info($"AngleDist -60 to 70: {angleDistD}");
Log.Info($"AngleDist -60 to 140: {angleDistE}");
if (MathF.Abs(angleDistA - angleDistB) > tolerance)
{
return(false);
}
if (MathF.Abs(angleDistA - angleDistC) > tolerance)
{
return(false);
}
if (MathF.Abs(angleDistA - 1) > tolerance)
{
return(false);
}
if (MathF.Abs(angleDistD - 130) > tolerance)
{
return(false);
}
if (MathF.Abs(angleDistE - 160) > tolerance)
{
return(false);
}
return(true);
}