Render a scene into the cubemap with six faces

Using Aspose.3D for .NET API, developers can render a scene into the cubemap with six faces and save all faces into the supported image formats.

Capture a cubemap with six faces

In this article, we create a Camera and two Light objects to capture the cubemap, also create a cubemap render target with depth texture, create a viewport and finally get the cubemap texture. The ITextureCubemap class retrieves the cubemap texture and the CubeFaceData class allows to access faces of the cubemap, and then export into the supported image format.

Programming Sample

This code example renders a scene into the cubemap with six faces and export into the image format.

C#

 string path = @"D:\Projects\glTF-Sample-Models\1.0\VC\glTF-Binary\VC.glb";

//load the scene

Scene scene = new Scene(path);

//create a camera for capturing the cube map

Camera cam = new Camera(ProjectionType.Perspective)

{

    NearPlane = 0.1,

    FarPlane = 200,

    RotationMode = RotationMode.FixedDirection

};

scene.RootNode.CreateChildNode(cam).Transform.Translation = new Vector3(5, 6, 0);

//create two lights to illuminate the scene

scene.RootNode.CreateChildNode(new Light() {LightType = LightType.Point}).Transform.Translation = new Vector3(-10, 7, -10);

scene.RootNode.CreateChildNode(new Light()

{

    Color = new Vector3(Color.CadetBlue)

}).Transform.Translation = new Vector3(49, 0, 49);



//create a renderer

using (var renderer = Renderer.CreateRenderer())

{

    //Create a cube map render target with depth texture, depth is required when rendering a scene.

    IRenderTexture rt = renderer.RenderFactory.CreateCubeRenderTexture(new RenderParameters(false), 512, 512);

    //a viewport is required on the render target

    rt.CreateViewport(cam, RelativeRectangle.FromScale(0, 0, 1, 1));

    renderer.Render(rt);

    //now lets get the cubemap texture

    ITextureCubemap cubemap = rt.Targets[0] as ITextureCubemap;

    //we can directly save each face to disk by specifing the file name

    CubeFaceData<string> fileNames = new CubeFaceData<string>()

    {

        Right = "right.png",

        Left = "left.png",

        Back = "back.png",

        Front = "front.png",

        Bottom = "bottom.png",

        Top = "top.png"

    };

    //and call Save method

    cubemap.Save(fileNames, ImageFormat.Png);

    //or we just need to use the render result in memory, we can save it to CubeFaceData<Bitmap>

    //CubeFaceData<Bitmap> bitmaps = new CubeFaceData<Bitmap>();

    //cubemap.Save(bitmaps);

    //bitmaps.Back.Save("back.bmp", ImageFormat.Bmp);

}