WPFで3D

環境

Windows 11 Pro (64bit)

dev.bat

@echo off
path %path%;C:\Windows\Microsoft.NET\Framework64\v4.0.30319
prompt $e[33m$p$g$e[m
cmd

wpf.rsp

# csc @wpf.rsp foo.cs
/r:System.Xaml.dll
/r:WPF\PresentationCore.dll
/r:WPF\PresentationFramework.dll
/r:WPF\WindowsBase.dll

三角形

wpf3d1.cs

// csc /t:winexe @wpf.rsp wpf3d1.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Media3D;

class MainWnd : Window {
	public MainWnd() {
		var pos = new Point3DCollection();
		pos.Add(new Point3D(1, 0, 0));
		pos.Add(new Point3D(0, 1, 0));
		pos.Add(new Point3D(0, 0, 0));

		var model = new GeometryModel3D();
		model.Geometry = new MeshGeometry3D() { Positions = pos };
		model.Material = new DiffuseMaterial(Brushes.LightGreen);

		var light = new DirectionalLight();

		var cam = new OrthographicCamera();
		cam.Position = new Point3D(0, 0, 5);

		var vp3d = new Viewport3D();
		vp3d.Camera = cam;
		vp3d.Children.Add(new ModelVisual3D() { Content = model });
		vp3d.Children.Add(new ModelVisual3D() { Content = light });

		Width = 300;
		Height = 300;
		Content = vp3d;
	}
}

class Program {
	[STAThread]
	static void Main() {
		var wnd = new MainWnd();
		wnd.ShowDialog();
	}
}

球

wpf3d2.cs

// csc /t:winexe @wpf.rsp wpf3d2.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Media3D;

class MainWnd : Window {
	public MainWnd() {
		var stacks = 12;
		var slices = 16;
		var pos = new Point3DCollection();
		var idx = new Int32Collection();

		for (var st = 0; st <= stacks; st++) {
			var a = Math.PI * st / stacks;
			var y = Math.Cos(a);
			var r = Math.Sin(a);
			for (var sl = 0; sl <= slices; sl++) {
				var b = 2 * Math.PI * sl / slices + Math.PI;
				var z = Math.Cos(b);
				var x = Math.Sin(b);
				pos.Add(new Point3D(x * r, y, z * r));
			}
		}

		for (var st = 0; st < stacks; st++) {
			var h0 = (slices + 1) * st;
			var h1 = (slices + 1) * (st + 1);
			for (var sl = 0; sl < slices; sl++) {
				var i0 = h0 + sl;
				var i1 = h1 + sl;
				var i2 = h0 + sl + 1;
				var i3 = h1 + sl + 1;
				idx.Add(i0);
				idx.Add(i1);
				idx.Add(i2);
				idx.Add(i3);
				idx.Add(i2);
				idx.Add(i1);
			}
		}

		var model = new GeometryModel3D();
		model.Geometry = new MeshGeometry3D() {
			Positions = pos,
			TriangleIndices = idx,
		};
		model.Material = new DiffuseMaterial(Brushes.LightGreen);

		var light = new DirectionalLight();
		light.Direction = new Vector3D(-1, -2, -3);

		var cam = new OrthographicCamera();
		cam.Position = new Point3D(0, 0, 5);

		var vp3d = new Viewport3D();
		vp3d.Camera = cam;
		vp3d.Children.Add(new ModelVisual3D() { Content = model });
		vp3d.Children.Add(new ModelVisual3D() { Content = light });

		Width = 300;
		Height = 300;
		Content = vp3d;
	}
}

class Program {
	[STAThread]
	static void Main() {
		var wnd = new MainWnd();
		wnd.ShowDialog();
	}
}

参考