/// <summary>
/// 3d空间中点到直线距离
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="s"></param>
/// <returns></returns>
// public static FloatL DistanceOfPoint3dWithLine3d(Line3d line3d, Vector3L s)
// {
// FloatL ab = FixPointMath.Sqrt(FixPointMath.Pow((line3d.m_point1.x - line3d.m_point2.x), 2.0f) + FixPointMath.Pow((line3d.m_point1.y - line3d.m_point2.y), 2.0f) + FixPointMath.Pow((line3d.m_point1.z - line3d.m_point2.z), 2.0f));
// FloatL as2 = FixPointMath.Sqrt(FixPointMath.Pow((line3d.m_point1.x - s.x), 2.0f) + FixPointMath.Pow((line3d.m_point1.y - s.y), 2.0f) + FixPointMath.Pow((line3d.m_point1.z - s.z), 2.0f));
// FloatL bs = FixPointMath.Sqrt(FixPointMath.Pow((s.x - line3d.m_point2.x), 2.0f) + FixPointMath.Pow((s.y - line3d.m_point2.y), 2.0f) + FixPointMath.Pow((s.z - line3d.m_point2.z), 2.0f));
// FloatL cos_A = (FixPointMath.Pow(as2, 2.0f) + FixPointMath.Pow(ab, 2.0f) - FixPointMath.Pow(bs, 2.0f)) / (2 * ab * as2);
// FloatL sin_A = FixPointMath.Sqrt(1 - FixPointMath.Pow(cos_A, 2.0f));
// return as2 * sin_A;
// }
public static Vector3L ClosestPointOfPoint3dWithSegment3d(Vector3L point, Segment3d line)
{
Vector3L lVec = line.m_point2 - line.m_point1; // Line Vector
FloatL t = Vector3L.Dot(point - line.m_point1, lVec) / Vector3L.Dot(lVec, lVec);
t = FixPointMath.Max(t, 0.0f); // Clamp to 0
t = FixPointMath.Min(t, 1.0f); // Clamp to 1
return(line.m_point1 + lVec * t);
}
public static Vector3L ClosestPointOfPoint3dWithRay3d(Vector3L point, Ray3d ray)
{
FloatL t = Vector3L.Dot(point - ray.m_rayOrigin, ray.m_rayDir);
// We assume the direction of the ray is normalized
// If for some reason the direction is not normalized
// the below division is needed. So long as the ray
// direction is normalized, we don't need this divide
// t /= Dot(ray.direction, ray.direction);
t = FixPointMath.Max(t, 0.0f);
return(ray.m_rayOrigin + ray.m_rayDir * t);
}
public AABB3d Merge(AABB3d other)
{
Vector3L selfMin = GetMin();
Vector3L otherMin = other.GetMin();
Vector3L selfMax = GetMax();
Vector3L otherMax = GetMax();
Vector3L totalMin = new Vector3L(FixPointMath.Min(selfMin.x, otherMin.x), FixPointMath.Min(selfMin.y, otherMin.y), FixPointMath.Min(selfMin.z, otherMin.z));
Vector3L totalMax = new Vector3L(FixPointMath.Max(selfMax.x, otherMax.x), FixPointMath.Max(selfMax.y, otherMax.y), FixPointMath.Max(selfMax.z, otherMax.z));
return(new AABB3d((totalMin + totalMax) / 2, totalMax - totalMin));
}
public void SetContent(Mesh3d mesh)
{
m_mesh3d = mesh;
Vector3L[] vertices = mesh.GetVertices();
Vector3L min = vertices[0];
Vector3L max = vertices[0];
for (int i = 1; i < mesh.m_triangleList.Count * 3; ++i)
{
min.x = FixPointMath.Min(vertices[i].x, min.x);
min.y = FixPointMath.Min(vertices[i].y, min.y);
min.z = FixPointMath.Min(vertices[i].z, min.z);
max.x = FixPointMath.Max(vertices[i].x, max.x);
max.y = FixPointMath.Max(vertices[i].y, max.y);
max.z = FixPointMath.Max(vertices[i].z, max.z);
}
m_aabb = Mesh3d.FromMinMax(min, max);
}
public static void AccelerateMesh(Mesh3d mesh)
{
if (mesh.m_accelerator != null)
{
return;
}
Vector3L[] vertices = mesh.GetVertices();
Vector3L min = vertices[0];
Vector3L max = vertices[0];
for (int i = 1; i < mesh.m_triangleList.Count * 3; ++i)
{
min.x = FixPointMath.Min(vertices[i].x, min.x);
min.y = FixPointMath.Min(vertices[i].y, min.y);
min.z = FixPointMath.Min(vertices[i].z, min.z);
max.x = FixPointMath.Max(vertices[i].x, max.x);
max.y = FixPointMath.Max(vertices[i].y, max.y);
max.z = FixPointMath.Max(vertices[i].z, max.z);
}
mesh.m_accelerator = new BVHNode();
mesh.m_accelerator.m_bounds = FromMinMax(min, max);
mesh.m_accelerator.m_children = null;
// this.m_accelerator.m_triangles = this.m_triangleList.Count;
// this.m_accelerator->triangles = new int[mesh.numTriangles];
// for (int i = 0; i < mesh.numTriangles; ++i) {
// mesh.accelerator->triangles[i] = i;
// }
//this.m_accelerator.m_triangles = this.m_triangleList;
// for (int i = 0; i < mesh.m_triangleList.Count; ++i)
// {
// mesh.m_accelerator.m_triangles.Add(mesh.m_triangleList);
// }
mesh.m_accelerator.m_triangles.AddRange(mesh.m_triangleList);
SplitBVHNode(mesh.m_accelerator, mesh, 3);
}
public static Vector2L Max(Vector2L lhs, Vector2L rhs)
{
return(new Vector2L(FixPointMath.Max(lhs.x, rhs.x), FixPointMath.Max(lhs.y, rhs.y)));
}
public static Vector3L Max(Vector3L lhs, Vector3L rhs)
{
return(new Vector3L(FixPointMath.Max(lhs.x, rhs.x), FixPointMath.Max(lhs.y, rhs.y), FixPointMath.Max(lhs.z, rhs.z)));
}
// public static UnityEngine.Vector3 Convert(Vector3L vec)
// {
// return new UnityEngine.Vector3(vec.x.ToFloat(), vec.y.ToFloat(), vec.z.ToFloat());
// }
public static FloatL Max(FloatL a, FloatL b, FloatL c)
{
return(FixPointMath.Max(FixPointMath.Max(a, b), c));
}