public AngleQuadrantInfo(double angle, double pre)
{
this._rotate = ChartHelper.DoubleHasValue(angle);
if (!this._rotate)
{
return;
}
//将角度转换为-360到360度之间
angle = angle % MathEx.ANGLE_360;
if (angle < ChartConstant.ZERO_D)
{
//将负数角度转换为正数角度
angle += MathEx.ANGLE_360;
}
this._angle = angle;
//角度值无效或小于精度值,则认为不需要旋转
if (angle <= pre)
{
this._rotate = false;
return;
}
double mathAngle;
Quadrant quadrant;
if (angle - MathEx.ANGLE_270 > ChartConstant.ZERO_D)
{
//angle:270-360°
quadrant = Quadrant.One;
mathAngle = angle - MathEx.ANGLE_270;
this._modRadians = MathEx.AngleToRadians(MathEx.ANGLE_180 - MathEx.ANGLE_90 - mathAngle);
}
else if (angle - MathEx.ANGLE_180 > ChartConstant.ZERO_D)
{
//angle:180-270°
quadrant = Quadrant.Two;
mathAngle = angle - MathEx.ANGLE_180;
this._modRadians = MathEx.AngleToRadians(MathEx.ANGLE_360 - MathEx.ANGLE_90 - angle);
}
else if (angle - MathEx.ANGLE_90 > ChartConstant.ZERO_D)
{
//angle:90-180°
quadrant = Quadrant.Three;
mathAngle = angle - MathEx.ANGLE_90;
this._modRadians = MathEx.AngleToRadians(MathEx.ANGLE_270 - MathEx.ANGLE_90 - angle);
}
else
{
//angle:0-90°
quadrant = Quadrant.Four;
mathAngle = angle;
}
this._radians = MathEx.AngleToRadians(mathAngle);
this._quadrant = quadrant;
}