//ExSummary: Please review the following code that demonstrates how to split a mesh by sub material id. You can make changes to the code and run it directly in your browser.
//ExStepSummary:0: The code below demonstrates how to create a new 3D scene with a box mesh.
//ExStepImage:0:step-0.png
//ExStepSummary:1: The following code demonstrates how to use sub material to split the box mesh.
//ExStepImage:1:step-0.png
//ExStepSummary:2: The following code demonstrates how to use different transform to see different sub mesh.
//ExStepImage:2:step-2.png
//ExStart
//ExStep:0-
using Aspose.ThreeD;
using Aspose.ThreeD.Utilities;
using Aspose.ThreeD.Entities;
using Aspose.ThreeD.Profiles;
//Create a new 3D scene
var scene = new Scene();
var mesh = (new Box()).ToMesh();
//ExStep:0-0
//Attach the mesh to the scene to we can see it
scene.RootNode.CreateChildNode(mesh);
//ExStep:1-
//Create a material vertex element so we can manually assign material id to different polygons
var materials = mesh.CreateElement(VertexElementType.Material) as VertexElementMaterial;
materials.Indices.Add(0);
materials.Indices.Add(0);
materials.Indices.Add(0);
materials.Indices.Add(1);
materials.Indices.Add(1);
materials.Indices.Add(1);
//Default value is MappingMode.AllSame, we need to map the sub material id by polygon.
//then the first sub mesh is from polygon 0,1,2, and second sub mesh is from polygon 3,4,5
materials.MappingMode = MappingMode.Polygon;
var meshes = PolygonModifier.SplitMesh(mesh, SplitMeshPolicy.CloneData);
//ExStep:1-1
//attach two sub meshes to different nodes so we can see them, but it looks like there's only one mesh.
scene.RootNode.CreateChildNode(meshes[0]);
scene.RootNode.CreateChildNode(meshes[1]);
//ExStep:2-2
//Make each sub mesh to use different translation, then we can see two meshes.
scene.RootNode.CreateChildNode(meshes[0]).Transform.Translation = new Vector3(0, 1, 0);
scene.RootNode.CreateChildNode(meshes[1]).Transform.Translation = new Vector3(0, -1, 0);
//ExStep:0-
scene
//ExEnd
OUTPUT:
