public static bool Intersects(Ray ray, Vector3 vertex1, Vector3 vertex2, Vector3 vertex3, out float distance, out float barycentricU, out float barycentricV)
{
unsafe
{
fixed(float *pinnedDist = &distance)
{
fixed(float *pinnedU = &barycentricU)
{
fixed(float *pinnedV = &barycentricV)
{
if (IDllImportApi.v3dxIntersectTri(&vertex1,
&vertex2, &vertex3,
&ray.Position, &ray.Direction,
pinnedU, pinnedV, pinnedDist) != 0)
{
return(true);
}
else
{
return(false);
}
}
}
}
}
}
/// <summary>
/// 重载"*"号操作符
/// </summary>
/// <param name="plane">平面对象</param>
/// <param name="scale">缩放值</param>
/// <returns>返回计算后的平面对象</returns>
public static Plane operator *(Plane plane, float scale)
{
Plane result;
unsafe
{
IDllImportApi.v3dxPlaneScale((Plane *)(&result), (Plane *)(&plane), scale);
}
return(result);
}
public static Plane Multiply(Plane plane, float scale)
{
Plane result;
unsafe
{
IDllImportApi.v3dxPlaneScale((Plane *)&result, (Plane *)&plane, scale);
}
return(result);
}
public static void Multiply(ref Plane plane, float scale, out Plane result)
{
unsafe
{
fixed(Plane *pResult = &result)
{
fixed(Plane *pPlane = &plane)
{
IDllImportApi.v3dxPlaneScale(pResult, pPlane, scale);
}
}
}
}
/// <summary>
/// 根据点列表建立球体包围盒
/// </summary>
/// <param name="points">点列表</param>
/// <returns>返回建立的球体包围盒</returns>
public static BoundingSphere FromPoints(Vector3[] points)
{
BoundingSphere sphere;
unsafe
{
fixed(Vector3 *pinnedPoints = &points[0])
{
int hr = IDllImportApi.v3dxComputeBoundingSphere(pinnedPoints, (UInt32)points.Length, sizeof(float) * 3, &sphere.Center, &sphere.Radius);
if (hr != 0)
{
return(BoundingSphere.DefaultSphere);
}
}
}
return(sphere);
}
public static bool Intersects(ref Plane plane, ref Vector3 start, ref Vector3 end, out Vector3 intersectPoint)
{
unsafe
{
fixed(Plane *pPlane = &plane)
{
fixed(Vector3 *pStart = &start)
{
fixed(Vector3 *pEnd = &end)
{
fixed(Vector3 *pIntersectPoint = &intersectPoint)
{
if (0 == (int)IDllImportApi.v3dxPlaneIntersectLine(pIntersectPoint, pPlane, pStart, pEnd))
{
return(false);
}
return(true);
}
}
}
}
}
}