Erfassen Sie die Ansicht von 3D Szene und Rendern zu einer Textur oder einem Fenster

Jede 3D Szene kann eine beliebige Anzahl von View ports umfassen. Mit Aspose.3D for .NET API können Entwickler einen oder mehrere View ports in einem einzigen Screenshot erfassen. Sie können es in der GUI-basierten .NET-Anwendung oder einem Bild rendern.

Erfassung und Rendern der Viewports der 3D-Szene

Die CreateRenderTexture-und CreateRenderWindow-Methoden, die von der RenderFactory-Klasse verfügbar gemacht werden, können verwendet werden, um ein neues Render ziel zu erstellen, das die Szene zu einer Textur oder einem Fenster macht.

Programmier probe

In diesem Code beispiel wird ein Viewport von 3D Scene erfasst und auf zwei verschiedene Arten wieder gegeben.

// For complete examples and data files, please go to https://github.com/aspose-3d/Aspose.3D-for-.NET

            // Load an existing 3D scene
            Scene scene = Scene.FromFile("scene.obj");
            // Create an instance of the camera
            Camera camera = new Camera();
            scene.RootNode.CreateChildNode("camera", camera).Transform.Translation = new Vector3(2, 44, 66);
            // Set the target
            camera.LookAt = new Vector3(50, 12, 0);
            // Create a light
            scene.RootNode.CreateChildNode("light", new Light() { Color = new Vector3(Color.White), LightType = LightType.Point }).Transform.Translation = new Vector3(26, 57, 43);

            // The CreateRenderer will create a hardware OpenGL-backend renderer
            // And some internal initializations will be done.
            // When the renderer left using the scope, the unmanaged hardware resources will also be disposed
            using (var renderer = Renderer.CreateRenderer())
            {
                renderer.EnableShadows = false;

                // Create a new render target that renders the scene to texture(s)
                // Use default render parameters
                // And one output targets
                // Size is 1024 x 1024
                // This render target can have multiple render output textures, but here we only need one output.
                // The other textures and depth textures are mainly used by deferred shading in the future.
                // But you can also access the depth texture through IRenderTexture.DepthTeture
                // Use CreateRenderWindow method to render in window, like:
                // Window = renderer.RenderFactory.CreateRenderWindow(new RenderParameters(), Handle);
                using (IRenderTexture rt = renderer.RenderFactory.CreateRenderTexture(new RenderParameters(), 1, 1024, 1024))
                {
                    // This render target has one viewport to render, the viewport occupies the 100% width and 100% height
                    Viewport vp = rt.CreateViewport(camera, new RelativeRectangle() { ScaleWidth = 1, ScaleHeight = 1 });
                    // Render the target and save the target texture to external file
                    renderer.Render(rt);
                    ((ITexture2D)rt.Targets[0]).Save(RunExamples.GetOutputFilePath("file-1viewports_out.png"), ImageFormat.Png);

                    // Now let's change the previous viewport only uses the half left side(50% width and 100% height)
                    vp.Area = new RelativeRectangle() { ScaleWidth = 0.5f, ScaleHeight = 1 };
                    // And create a new viewport that occupies the 50% width and 100% height and starts from 50%
                    // Both of them are using the same camera, so the rendered content should be the same
                    rt.CreateViewport(camera, new RelativeRectangle() { ScaleX = 0.5f, ScaleWidth = 0.5f, ScaleHeight = 1 });
                    // But this time let's increase the field of view of the camera to 90 degree so it can see more part of the scene
                    camera.FieldOfView = 90;
                    renderer.Render(rt);
                    ((ITexture2D)rt.Targets[0]).Save(RunExamples.GetOutputFilePath("file-2viewports_out.png"), ImageFormat.Png);
                }
            }