HelixToolkit使用教程

HelixToolkit使用总结：

问题点:

        3d光源

        相机

        网格信息

1、配置HelixViewPort3d基本参数

2、配置相机参数和相机位置：HelixViewPort3D.DefaultCamera

        设置相机的放置方向和观看位置

  <hv:HelixViewport3D.DefaultCamera>
                <PerspectiveCamera LookDirection="-587.475,-330.619,-229.365" Position="587.475,330.619,256.278" UpDirection="-0.248,-0.139,0.959" FieldOfView="45" NearPlaneDistance="0.1"/>
            </hv:HelixViewport3D.DefaultCamera>

3、配置光线:hv:SunLight

4、配置坐标网格 hv:GridLinesVisual3D

<hv:GridLinesVisual3D Width="10000" Length="10000" MinorDistance="50" MajorDistance="50" Thickness="2" Fill="White"/>

5、配置模型的属性ModelVisual3D两个属性

1）、材质和外观

GeometryModel3D

1、Material

2、Geometry

 GeometryModel3D model1 = d.Children[i] as GeometryModel3D;
 var materialGroup = new MaterialGroup();
 DiffuseMaterial diffMat = new DiffuseMaterial(new SolidColorBrush(Colors.Gray));
 materialGroup.Children.Add(diffMat);
 model1.Material = materialGroup;
 model1.BackMaterial = materialGroup;

对模型位置修改：

        1）模型内位置的修改

对象的平移：

 GeometryModel3D model1 = d.Children[0] as GeometryModel3D;
                    MeshGeometry3D mesh = model1.Geometry as MeshGeometry3D;
                    var res = mesh.Positions;
                    for (int i = 0; i < res.Count; i++)
                    {
                        var sp = mesh.Positions[i];
                        mesh.Positions[i] = new Point3D() { X = sp.X, Y =sp.Y, Z =sp.Z+ 10 };
                    }
                   
                    model1.Geometry = mesh;

UI界面更新外观和位置：

<GeometryModel3D>
                                <GeometryModel3D.Material>
                                    <DiffuseMaterial Brush="Green"/>
                                </GeometryModel3D.Material>
                                <GeometryModel3D.Geometry>
                                    <MeshGeometry3D Positions="0,0,0 2,0,0 2,2,0 0,2,0"
TriangleIndices="0,1,2 0,2,3">
                                    </MeshGeometry3D>
                                </GeometryModel3D.Geometry>
                            </GeometryModel3D> 

2）整体模型位置的修改

        通过对前台代码的修改即可。或者是使用mvvm进行绑定修改

效果图如下：

 实现对模型的运动控制