rename ungenericed graphic vec usage to genericed

src/Nitload.Mathematics/Geometries/PlainGeometry/Define/PlainGeometry.cs

@@ -20,7 +20,7 @@ namespace Nitload.Geometries
     public abstract class PlainGeometry : IGeometry
     {
 
-        protected Vec4[] vertexMat;
+        protected Vec3<float>[] vertexMat;
         internal CoordinationBase coordinate;
 
         internal PlainGeometry(
@@ -34,8 +34,8 @@ namespace Nitload.Geometries
                      int index
         ]
         {
-            get => new Point(vertexMat[index]);
-            set => vertexMat[index].vec = value.coordVec;
+            get => new(vertexMat[index]);
+            set => vertexMat[index] = value.Coord;
         }
 
         public int VertexCount => this.vertexMat.Length;
@@ -43,9 +43,9 @@ namespace Nitload.Geometries
         public abstract ReadOnlySpan<int> VertexIndices { get; }
 
         #pragma warning disable CA1819 
-        public Vec4[] VertexStream => vertexMat;
+        public Vec3<float>[] VertexStream => vertexMat;
 
         public CoordinationBase Coordination => this.coordinate;
 #pragma warning restore CA1819
     }
-}
+}