75 lines
2.3 KiB
C#
75 lines
2.3 KiB
C#
// -----------------------------------------------------------------------------
|
||
// file="Plain"
|
||
// Project: StgSharp
|
||
// Copyright (c) Nitload.
|
||
// SPDX-License-Identifier: MIT
|
||
// -----------------------------------------------------------------------------
|
||
|
||
using Nitload.Mathematics;
|
||
using Nitload.Mathematics.Numeric.Graphics;
|
||
|
||
using System.Numerics;
|
||
|
||
namespace Nitload.Geometries
|
||
{
|
||
public unsafe class Plain
|
||
{
|
||
|
||
internal readonly float d = -1;
|
||
internal Vec3<float> _origin;
|
||
|
||
internal Vec3<float> plainParameter;
|
||
internal Vec3<float> vec1;
|
||
internal Vec3<float> vec2;
|
||
|
||
public Plain(
|
||
Vec3<float> o,
|
||
Vec3<float> v1,
|
||
Vec3<float> v2
|
||
)
|
||
{
|
||
this._origin = o;
|
||
this.vec1 = v1 - (v2 * (v1.Y / v2.Y)); //xz
|
||
this.vec2 = v2 - (vec1 * (v2.X / v1.X)); //yz
|
||
|
||
// |_origin|-k1*|vec1|-k2*|vec2| --> plainParameter.Z；
|
||
plainParameter.Z = _origin.Z - (vec1.Z * (_origin.X / vec1.X)) - (vec2.Z * (_origin.Y / vec2.Y));
|
||
|
||
// plainParameter.Z -> plainParameter.X, plainParameter.Y
|
||
plainParameter.X = vec1.X * (vec1.Z / plainParameter.Z);
|
||
plainParameter.Y = vec2.Y * (vec2.Z / plainParameter.Z);
|
||
|
||
plainParameter.X = 1 / plainParameter.X;
|
||
plainParameter.Y = 1 / plainParameter.Y;
|
||
plainParameter.Z = 1 / plainParameter.Z;
|
||
}
|
||
|
||
public Plain(
|
||
Point p1,
|
||
Point p2,
|
||
Point p3
|
||
)
|
||
{
|
||
Vec3<float> origin = p1.Coord;
|
||
Vec3<float> v1 = p2.Coord - origin;
|
||
Vec3<float> v2 = p3.Coord - origin;
|
||
|
||
|
||
vec1 = v1 - (v2 * (v1.Y / v2.Y)); //xz
|
||
vec2 = v2 - (vec1 * (v2.X / v1.X)); //yz
|
||
|
||
// |_origin|-k1*|vec1|-k2*|vec2| --> plainParameter.Z；
|
||
plainParameter.Z = origin.Z - (vec1.Z * (origin.X / vec1.X)) - (vec2.Z * (origin.Y / vec2.Y));
|
||
|
||
// plainParameter.Z --> plainParameter.X, plainParameter.Y
|
||
plainParameter.X = vec1.X * (vec1.Z / plainParameter.Z);
|
||
plainParameter.Y = vec2.Y * (vec2.Z / plainParameter.Z);
|
||
|
||
plainParameter.X = 1 / plainParameter.X;
|
||
plainParameter.Y = 1 / plainParameter.Y;
|
||
plainParameter.Z = 1 / plainParameter.Z;
|
||
}
|
||
|
||
}
|
||
}
|