public static bool IsSegmentInsectCircle2(Vector2 seg1, Vector2 seg2, Vector2 center, float r, ref GeoInsectPointArrayInfo insect)
{
if (GeoCircleUtils.IsInCircle(center, r, seg1) && GeoCircleUtils.IsInCircle(center, r, seg2)) // 都在外面，不一定
{
return(false);
}
List <Vector3> array = insect.mHitGlobalPoint.mPointArray;
List <int> removeIndex = new List <int>();
for (int i = 0; i < array.Count; ++i)
{
Vector2 temp = new Vector2(array[i].x, array[i].y);
if (!IsPointInSegment2(seg1, seg2, ref temp))
{
removeIndex.Add(i);
}
}
for (int i = removeIndex.Count - 1; i >= 0; --i)
{
array.RemoveAt(i);
}
insect.mHitGlobalPoint.mPointArray = array;
insect.mIsIntersect = insect.mHitGlobalPoint.mPointArray.Count > 0;
return(insect.mIsIntersect);
}
public static bool IsRayInsectCircle3(Vector3 rayOrigin, Vector3 rayDirection, Vector3 center, float r, GeoPlane plane, ref GeoInsectPointInfo insect)
{
if (GeoPlaneUtils.IsPlaneInsectRay(plane.mNormal, plane.mD, rayOrigin, rayDirection, ref insect))
{
if (GeoCircleUtils.IsInSphere(center, r, insect.mHitGlobalPoint))
{
return(true);
}
}
return(false);
}
public static bool IsSegmentInsectCircle3(Vector3 seg1, Vector3 seg2, Vector3 center, float r, GeoPlane plane, ref GeoInsectPointInfo insect)
{
bool isInsect = GeoPlaneUtils.IsPlaneInsectSegment(plane.mNormal, plane.mD, seg1, seg2, ref insect);
if (isInsect)
{
if (GeoCircleUtils.IsInSphere(center, r, insect.mHitGlobalPoint))
{
return(true);
}
}
insect.mIsIntersect = isInsect;
return(isInsect);
}
public static bool IsTriangleInsectCircle3(Vector3 p1, Vector3 p2, Vector3 p3, Vector3 center, float r, GeoPlane plane, ref GeoInsectPointArrayInfo insect)
{
bool isInsect = GeoPlaneUtils.IsPlaneInsectTriangle(plane.mNormal, plane.mD, p1, p2, p3, ref insect);
if (isInsect)
{
if (insect.mHitGlobalPoint.mPointArray.Count == 3) // 共面， 转化成 2d
{
insect.Clear();
return(IsTriangleInsectPlaneCircle2(p1, p2, p3, center, r, plane, ref insect));
}
else if (insect.mHitGlobalPoint.mPointArray.Count == 1)
{
if (GeoCircleUtils.IsInSphere(center, r, insect.mHitGlobalPoint.mPointArray[0]))
{
return(true);
}
}
else if (insect.mHitGlobalPoint.mPointArray.Count == 2)
{
Vector3 seg1 = plane.TransformToLocal(insect.mHitGlobalPoint.mPointArray[0]);
Vector3 seg2 = plane.TransformToLocal(insect.mHitGlobalPoint.mPointArray[1]);
Vector3 c1 = plane.TransformToLocal(center);
Vector2 p12 = new Vector2(seg1.x, seg1.z);
Vector2 p22 = new Vector2(seg2.x, seg2.z);
Vector2 c2 = new Vector2(c1.x, c1.z);
insect.Clear();
GeoInsectPointArrayInfo temp = new GeoInsectPointArrayInfo();
if (GeoSegmentUtils.IsSegmentInsectCircle2(p12, p22, c2, r, ref temp))
{
insect.mIsIntersect = true;
foreach (Vector3 v in temp.mHitGlobalPoint.mPointArray)
{
Vector3 vv = new Vector3(v.x, 0.0f, v.y);
vv = plane.TransformToGlobal(vv);
insect.mHitGlobalPoint.mPointArray.Add(vv);
}
return(true);
}
}
}
return(false);
}
public static bool IsLineInsectCircle3(Vector3 line1, Vector3 line2, Vector3 center, float r, GeoPlane plane, ref GeoInsectPointArrayInfo insect)
{
if (GeoPlaneUtils.IsPointOnPlane(plane.mNormal, plane.mD, line1) && GeoPlaneUtils.IsPointOnPlane(plane.mNormal, plane.mD, line2))
{
return(IsLineInsectCirclePlane2(line1, line2, center, r, plane, ref insect));
}
GeoInsectPointInfo info = new GeoInsectPointInfo();
bool isInsect = GeoPlaneUtils.IsPlaneInsectLine(plane.mNormal, plane.mD, line1, line2, ref info);
if (isInsect)
{
if (GeoCircleUtils.IsInSphere(center, r, info.mHitGlobalPoint))
{
insect.mIsIntersect = true;
insect.mHitGlobalPoint.mPointArray.Add(info.mHitGlobalPoint);
return(true);
}
insect.mIsIntersect = false;
}
return(false);
}