public static void GetEdge(IRect rect, int index, out Vector3 from, out Vector3 to)
{
var point = rect.GetRectInfo();
switch (index)
{
case 0:
from = point[0];
to = point[1];
break;
case 1:
from = point[1];
to = point[2];
break;
case 2:
from = point[2];
to = point[3];
break;
default:
from = point[3];
to = point[0];
break;
}
}
public bool IsContainRectVertex(IRect rect)
{
var testPoints = rect.GetRectInfo();
for (var i = 0; i < testPoints.Length; ++i)
{
var nowPoint = testPoints[i];
if (IsContainPoint(nowPoint))
{
return(true);
}
}
return(false);
}
static void DrawRect(IRect rect, Color color)
{
var point = rect.GetRectInfo();
if (point == null)
{
return;
}
Gizmos.color = color;
for (var i = 0; i <= 2; ++i)
{
Gizmos.DrawLine(point[i], point[i + 1]);
}
Gizmos.DrawLine(point[3], point[0]);
}
//b是不是被a包住
//(用在a的軸向沒有和世界對齊的情況)
//(另1種作法是把b的4個點轉換到a的local，之後就可以用軸對齊的判定)
public static bool IsContainCenterPoint(IRect a, IRect b)
{
var point = a.GetRectInfo();
var p1 = point[1];
var p2 = point[2];
var p3 = point[3];
var xDir = (p3 - p2);
var zDir = (p1 - p2);
var width = xDir.magnitude;
var height = zDir.magnitude;
var xNormalDir = xDir / width;
var zNormalDir = zDir / height;
//只判斷中心點
var center = b.GetCenter();
var vec = center - p2;
var xValue = Vector3.Dot(vec, xNormalDir);
var zValue = Vector3.Dot(vec, zNormalDir);
bool test = xValue > 0 && xValue < width && zValue > 0 && zValue < height;
return(test);
/*
* foreach (var tPoint in testPoint)
* {
* var vec = tPoint - p2;
* var xValue = Vector3.Dot(vec, xNormalDir);
* var zValue = Vector3.Dot(vec, zNormalDir);
*
* bool test = xValue > 0 && xValue < width && zValue > 0 && zValue < height;
* if (!test)
* return false;
* }
*
* return true;
*/
}