daily update on 20230418 by nitload youmu.

rewrite of geometry is completed. ready for release of ver0.1.0
2023-04-18 01:59:26 +08:00
parent a58537a003
commit 906becc265
35 changed files with 338 additions and 633 deletions
@@ -0,0 +1,55 @@
+using StgSharp.Math;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StgSharp.Geometries
+{
+    public unsafe class Plain
+    {
+        internal vec3d origin;
+        internal vec3d vec1;
+        internal vec3d vec2;
+
+        internal vec3d plainParameter;
+        internal readonly float d = -1;
+
+        public Plain(vec3d o, vec3d v1, vec3d v2)
+        {
+            this.origin = o;
+            this.vec1 = v1 - v2 * (v1.Y / v2.Y);   //计算平面在xz平面上的方向投影
+            this.vec2 = v2 - vec1 * (v2.X / v1.X); //计算平面在yz平面上的方向投影
+
+            //|origin|-k1*|vec1|-k2*|vec2|计算plainParameter.Z；
+            plainParameter.Z = origin.Z - vec1.Z * (origin.X / vec1.X) - vec2.Z * (origin.Y / vec2.Y);
+            //根据plainParameter.Z和对应的方向矢量计算plainParameter.X和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)
+        {
+            vec3d origin = p1._position;
+            vec3d v1 = p2._position - origin;
+            vec3d v2 = p3._position - origin;
+
+
+            vec1 = v1 - v2 * (v1.Y / v2.Y);   //计算平面在xz平面上的方向投影
+            vec2 = v2 - vec1 * (v2.X / v1.X); //计算平面在yz平面上的方向投影
+
+            //|origin|-k1*|vec1|-k2*|vec2|计算plainParameter.Z；
+            plainParameter.Z = origin.Z - vec1.Z * (origin.X / vec1.X) - vec2.Z * (origin.Y / vec2.Y);
+            //根据plainParameter.Z和对应的方向矢量计算plainParameter.X和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;
+        }
+
+    }}