public static bool IsAABBInsectTriangle2Plane(Vector3 min, Vector3 max, GeoPlane plane, Vector3 p1, Vector3 p2, Vector3 p3, ref GeoInsectPointArrayInfo insect)
{
Vector2 p11, p21, p31;
GeoPlaneUtils.PlaneTransformLocalTriangle(p1, p2, p3, plane, out p11, out p21, out p31);
Vector3 vmin = plane.TransformToLocal(min);
Vector3 vmax = plane.TransformToLocal(max);
bool isInsect = IsAABBInsectTriangle2(vmin, vmax, p11, p21, p31, ref insect);
if (isInsect)
{
insect.mIsIntersect = true;
insect.mHitGlobalPoint.mPointArray = GeoPlaneUtils.PlaneTransformGlobal(insect.mHitGlobalPoint.mPointArray, plane);
}
return(insect.mIsIntersect);
}
public static float PointClosest2PlaneTriangle2(Vector3 p1, Vector3 p2, Vector3 p3, GeoPlane plane, ref Vector3 p, ref Vector3 close)
{
Vector2 p11, p21, p31, pt;
GeoPlaneUtils.PlaneTransformLocalTriangle(p1, p2, p3, plane, out p11, out p21, out p31);
Vector3 pp = plane.TransformToLocal(p);
pt = new Vector2(pp.x, pp.z);
Vector2 close1 = new Vector2();
float d = PointClosest2Triangle2(p11, p21, p31, ref pt, ref close1);
close.x = close1.x;
close.y = 0;
close.z = close1.y;
close = plane.TransformToGlobal(close);
return(d);
}
// 两三角面 共面的情况
private static bool IsTriangleInsectTrianglePlane2(Vector3 p1, Vector3 p2, Vector3 p3, Vector3 p4, Vector3 p5, Vector3 p6, ref GeoInsectPointArrayInfo insect)
{
GeoPlane plane = GeoPlaneUtils.CreateFromTriangle(p1, p2, p3);
Vector2 p11, p21, p31, p41, p51, p61;
GeoPlaneUtils.PlaneTransformLocalTriangle(p1, p2, p3, plane, out p11, out p21, out p31);
GeoPlaneUtils.PlaneTransformLocalTriangle(p4, p5, p6, plane, out p41, out p51, out p61);
GeoInsectPointArrayInfo tmp = new GeoInsectPointArrayInfo();
bool isInsect = IsTriangleInsectTriangle2(p11, p21, p31, p41, p51, p61, ref tmp);
if (isInsect)
{
foreach (Vector3 v in tmp.mHitGlobalPoint.mPointArray)
{
Vector3 vt = new Vector3(v.x, 0.0f, v.z);
vt = plane.TransformToGlobal(vt);
insect.mHitGlobalPoint.mPointArray.Add(vt);
}
insect.mIsIntersect = insect.mHitGlobalPoint.mPointArray.Count > 0;
}
return(insect.mIsIntersect);
}
