protected override void UpdatePosAndTangent()
{
mCurFrame++;
float len = mPathLengthMoved - GetLength(mCurrentWaypointIndex);
float lenTotal = GetLength(mCurrentWaypointIndex + 1) - GetLength(mCurrentWaypointIndex);
float u = len / lenTotal;
Vector3 start = GetWaypoint(mCurrentWaypointIndex);
Vector3 end = GetWaypoint(mCurrentWaypointIndex + 1);
Vector3 linePos = (1 - u) * start + u * end;
#if UNITY_EDITOR
mMovedTime += Time.deltaTime;
mMovedLength += (linePos - CurInfo.linePos).magnitude;
#endif
CurInfo.linePos = linePos;
CurInfo.curvePos = linePos;
if (CurInfo.isDirChanged)
{
mLast = CurInfo.curveDir;
mNext = (end - start).normalized;
mCurFrame = 0;
}
float pro = mCurFrame * mFrameCountInv;
if (pro < 1)
{
CurInfo.curveDir = GeoUtils.Interpolation(mLast, mNext, pro).normalized;
}
else
{
CurInfo.curveDir = mNext;
}
#if UNITY_EDITOR
// 记录曲线点和切向，以及线上点和切向
if (trackPos != null)
{
trackPos.Add(CurInfo.linePos);
trackPos.Add(CurInfo.lineDir);
trackPos.Add(CurInfo.curvePos);
trackPos.Add(CurInfo.curveDir);
}
#endif
}
public bool IsIntersect(ref GeoRay2 dist, ref GeoInsectPointArrayInfo insect)
{
bool isInsect = GeoRayUtils.IsRayInsectTriangle2(dist.mOrigin, dist.mDirection, mP1, mP2, mP3, ref insect);
if (isInsect)
{
insect.mHitObject2 = this;
float min = 1e5f;
foreach (Vector3 v in insect.mHitGlobalPoint.mPointArray)
{
float len = (GeoUtils.ToVector2(v) - dist.mOrigin).magnitude;
if (len < min)
{
min = len;
}
}
insect.mLength = min;
}
return(isInsect);
}
/// <summary>
/// 简单多边形或者三角面点数组
/// </summary>
/// <param name="tries"></param>
/// <param name="isPolygon">是否为简单多边形</param>
/// <param name="vert"></param>
/// <returns></returns>
public static List<List<int>> Decompose(List<Vector2> tries, bool isPolygon, ref List<Vector2> vert)
{
if (isPolygon)
{
EarPolygon poly = new EarPolygon();
foreach (Vector2 v in tries)
{
poly.AddPoint(v.x, v.y);
}
EarClipping.Clip(poly);
List<Vector2> triangles = new List<Vector2>();
GeoUtils.FlatList(poly.mResults, ref triangles);
List<int> indices = new List<int>();
GeoUtils.MeshVertexPrimitiveType(triangles, ref vert, ref indices);
return HMDecompose(vert, indices);
}
else
{
List<int> indices = new List<int>();
GeoUtils.MeshVertexPrimitiveType(tries, ref vert, ref indices);
return HMDecompose(vert, indices);
}
}
public bool GetIntersection(GeoRay2 ray, ref GeoInsectPointArrayInfo intersection, bool occlusion)
{
if (mFlatTreeList.Count == 0)
{
return(false);
}
intersection.mIsIntersect = false;
intersection.mLength = 999999999.0f;
intersection.mHitObject2 = null;
int closer, other;
BVHTraversal[] todo = new BVHTraversal[64];
todo[0] = new BVHTraversal();
int stackptr = 0;
todo[stackptr].mIndex = 0;
todo[stackptr].mLength = -9999999.0f;
while (stackptr >= 0)
{
int ni = todo[stackptr].mIndex;
float near = todo[stackptr].mLength;
stackptr--;
BVHFlatNode2 node = mFlatTreeList[ni];
// 对叶节点做相交测试
if (node.mRightOffset == 0)
{
bool hit = false;
for (int o = 0; o < node.mLeafCount; ++o)
{
GeoInsectPointArrayInfo current = new GeoInsectPointArrayInfo();
BVHObject2 obj = mBuildPrims[(int)node.mStartIndex + o];
hit = obj.IsIntersect(ref ray, ref current);
if (hit)
{
if (occlusion)
{
intersection = current;
return(true);
}
if (current.mLength < intersection.mLength)
{
intersection = current;
}
}
}
}
else
{
closer = ni + 1;
other = ni + (int)node.mRightOffset;
// 对父结点做测试
GeoInsectPointArrayInfo in1 = new GeoInsectPointArrayInfo();
GeoInsectPointArrayInfo in2 = new GeoInsectPointArrayInfo();
bool hitc0 = GeoRayUtils.IsRayInsectAABB2(ray.mOrigin, ray.mDirection, mFlatTreeList[closer].mBox.mMin, mFlatTreeList[closer].mBox.mMax, ref in1);
bool hitc1 = GeoRayUtils.IsRayInsectAABB2(ray.mOrigin, ray.mDirection, mFlatTreeList[other].mBox.mMin, mFlatTreeList[other].mBox.mMax, ref in2);
if (hitc0 && hitc1)
{
float l0 = (GeoUtils.ToVector2(in1.mHitGlobalPoint[0]) - ray.mOrigin).magnitude;
float l2 = (GeoUtils.ToVector2(in2.mHitGlobalPoint[0]) - ray.mOrigin).magnitude;
if (l2 < l0)
{
float temp = l0;
l0 = l2;
l2 = temp;
int itemp = closer;
closer = other;
other = itemp;
}
todo[++stackptr] = new BVHTraversal(other, l2);
todo[++stackptr] = new BVHTraversal(closer, l0);
}
else if (hitc0)
{
float l0 = (GeoUtils.ToVector2(in1.mHitGlobalPoint[0]) - ray.mOrigin).magnitude;
todo[++stackptr] = new BVHTraversal(closer, l0);
}
else if (hitc1)
{
float l2 = (GeoUtils.ToVector2(in2.mHitGlobalPoint[0]) - ray.mOrigin).magnitude;
todo[++stackptr] = new BVHTraversal(other, l2);
}
}
}
if (intersection.mHitObject2 != null)
{
intersection.mHitGlobalPoint.Clear();
intersection.mHitGlobalPoint.Add(ray.mOrigin + ray.mDirection * intersection.mLength);
}
return(intersection.mHitObject2 != null);
}
