public static IBody2 CreateSheetFromSurface(this IModeler modeler, ISurface surf, IMathPoint p0, IMathPoint p1)
{
var uvLow = surf.GetClosestPointOnTs(p0.ArrayData.CastArray <double>().ToVector3());
var uvHigh = surf.GetClosestPointOnTs(p1.ArrayData.CastArray <double>().ToVector3());
return(modeler.CreateSheetFromSurface(surf, uvLow, uvHigh));
}
private static IBody2 CreateSheetFromSurface(IModeler modeler, ISurface surf, double[] uRange, double[] vRange)
{
var uvRange = uRange.Concat(vRange).ToArray();
var sheet = (IBody2)modeler.CreateSheetFromSurface(surf, uvRange);
return(sheet);
}
public static IBody2 CreateSurfaceBody(this IModeler modeler, ISurface surface)
{
var swSurfPara = surface.Parameterization2();
var uvrange = new double[]
{
swSurfPara.UMin,
swSurfPara.UMax,
swSurfPara.VMin,
swSurfPara.VMax
};
return((IBody2)modeler.CreateSheetFromSurface(surface, uvrange));
}
/// <summary>
/// Create a bounded sheet.
/// </summary>
/// <param name="modeler"></param>
/// <param name="center">Center of the surface</param>
/// <param name="vNormal">Direction of the surface</param>
/// <param name="p0">Point to project onto surface to find UV bounds</param>
/// <param name="p1">Point to project onto surface to find UV bounds</param>
/// <returns></returns>
public static IBody2 CreateSheet(this IModeler modeler, Vector3 center, Vector3 vNormal, double r)
{
var surf = (Surface)modeler.CreatePlanarSurface(center.ToDoubles(), vNormal.ToDoubles());
var mid = surf.GetClosestPointOnTs(center);
var midPoint = mid.Point.ToVector3();
var upVector = (surf.PointAt(mid.U, mid.V + 1) - midPoint).Unit();
var rightVector = (surf.PointAt(mid.U + 1, mid.V) - midPoint).Unit();
var low = midPoint - upVector * r - rightVector * r;
var high = midPoint + upVector * r + rightVector * r;
var uvLow = surf.GetClosestPointOnTs(low);
var uvHigh = surf.GetClosestPointOnTs(high);
return(modeler.CreateSheetFromSurface(surf, uvLow, uvHigh));
}
/// <summary>
/// 创建球体
/// </summary>
/// <param name="modeler"></param>
/// <param name="center"></param>
/// <param name="radius"></param>
/// <returns></returns>
public static IBody2 CreateSphereBody(this IModeler modeler, Vector3 center, double radius)
{
var axis = Vector3.UnitZ;
var refaxis = Vector3.UnitY;
var sphere = (ISurface)modeler.CreateSphericalSurface2(center.ToDoubles(), axis.ToDoubles(), refaxis.ToDoubles(), radius);
var swSurfPara = sphere.Parameterization2();
var uvrange = new double[]
{
swSurfPara.UMin,
swSurfPara.UMax,
swSurfPara.VMin,
swSurfPara.VMax
};
var sphereBody = (IBody2)modeler.CreateSheetFromSurface(sphere, uvrange);
return(sphereBody);
}
private static IBody2 CreateSheetFromSurface(IModeler modeler, ISurface surf, double[] uRange, double[] vRange)
{
var uvRange = uRange.Concat(vRange).ToArray();
var sheet = (IBody2) modeler.CreateSheetFromSurface(surf, uvRange);
return sheet;
}