/// <summary>
/// 二维向量旋转
/// </summary>
/// <param name="v">向量</param>
/// <param name="angle">旋转角度</param>
/// <returns></returns>
public static Vector2 Rotate(this Vector2 v, float angle)
{
var a = MathH.atan(v.x, v.y);
a += angle;
a %= 360;
if (a < 0)
{
a += 360;
}
return(MathH.Tan2(a));
}
/// <summary>
/// 检查点在弧形里面
/// </summary>
/// <param name="ori">弧形圆心</param>
/// <param name="r">弧形半径</param>
/// <param name="direct">弧形方向,0-360角度</param>
/// <param name="scope">弧形范围0-180角度</param>
/// <param name="dot">点</param>
public static bool DotToArc(Vector2 ori, float r, float direct, float scope, Vector2 dot)
{
r *= r;
float dx = dot.x - ori.x;
float d = dx * dx;
float dy = dot.y - ori.y;
d += dy * dy;
if (d < r)//在半径内
{
float ta = MathH.atan(dx, dy);
float a = direct - scope;
if (ta == a)
{
return(true);
}
float b = direct + scope;
if (ta == b)
{
return(true);
}
if (a < 0)
{
if (ta < b)
{
return(true);
}
a += 360;
if (ta > a)
{
return(true);
}
}
else if (b > 360)
{
if (ta > a)
{
return(true);
}
b -= 360;
if (ta < b)
{
return(true);
}
}
else if (ta > a & ta < b)
{
return(true);
}
}
return(false);
}
void OnMove()
{
switch (pressCount)
{
case 1:
if (Pressed)
{
base.OnDrag(actions[0]);
}
else
{
base.OnMouseMove(actions[0]);
}
break;
case 2:
var d0 = actions[0].CanPosition;
var d1 = actions[1].CanPosition;
Vector2 d = d0 - d1;
float s = d.x * d.x + d.y * d.y;
s = Mathf.Sqrt(s);
DeltaPix = s - CurrentScale;
CurrentScale = s;
DirPix = s - StartScale;
s /= StartScale;
CurScale = s;
var v0 = RawPos0 - RawPos1;
float a0 = MathH.atan(v0.x, v0.y); //原始角度
var a1 = MathH.atan(d.x, d.y); //当前角度
DirAngle = a0 - a1;
v0 = LastPos0 - LastPos1;
a0 = MathH.atan(v0.x, v0.y);//上一帧角度
DeltaAngle = a0 - a1;
LastPos0 = d0;
LastPos1 = d1;
if (TowFingerMove != null)
{
TowFingerMove(this);
}
break;
case 3:
LastPos0 = actions[0].CanPosition;
LastPos1 = actions[1].CanPosition;
LastPos2 = actions[2].CanPosition;
if (ThreeFingerMove != null)
{
ThreeFingerMove(this);
}
break;
case 4:
LastPos0 = actions[0].CanPosition;
LastPos1 = actions[1].CanPosition;
LastPos2 = actions[2].CanPosition;
LastPos3 = actions[3].CanPosition;
if (FourFingerMove != null)
{
FourFingerMove(this);
}
break;
case 5:
LastPos0 = actions[0].CanPosition;
LastPos1 = actions[1].CanPosition;
LastPos2 = actions[2].CanPosition;
LastPos3 = actions[3].CanPosition;
LastPos4 = actions[4].CanPosition;
if (FiveFingerMove != null)
{
FiveFingerMove(this);
}
break;
}
}