在 3D 个几何体上投射和接收阴影

通常，某些 3D 文件格式可以在几何图形 (如 FBX) 中存储与阴影相关的设置。使用 Aspose.3D for .NET，开发人员可以通过从光源的视点映射阴影来渲染图像。图像质量取决于光源、仰角和相机与几何对象之间的距离。

投射并接收阴影

默认情况下，场景中的所有对象都会从光源投射阴影。开发人员还可以在对象表面中的每个对象的基础上接收阴影。此代码示例揭示了如何设置光和相机对象的位置。它还创建了一个平面，并放置了具有不同颜色和阴影设置的三个对象。

所有几何都有 CastShadows = true 和 ReceiveShadows=true，红色框和圆环的阴影投射到平面上，红色框不会接收阴影，蓝色框不会投射阴影。

编程示例

此代码示例在 3D 个几何图形上投射和接收阴影。

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

                Scene scene = new Scene();
                Camera camera = new Camera();
                camera.NearPlane = 0.1;
                scene.RootNode.CreateChildNode("camera", camera);
                Light light;
                scene.RootNode.CreateChildNode("light", light = new Light()
                {
                    NearPlane = 0.1,
                    CastShadows = true,
                    Color = new Vector3(Color.White)
                }).Transform.Translation = new Vector3(9.4785, 5, 3.18);
                light.LookAt = Vector3.Origin;
                light.Falloff = 90;

                // Create a plane
                Node plane = scene.RootNode.CreateChildNode("plane", new Plane(20, 20));
                plane.Material = new PhongMaterial() { DiffuseColor = new Vector3(Color.DarkOrange) };
                plane.Transform.Translation = new Vector3(0, 0, 0);

                // Create a torus for casting shadows
                Mesh m = (new Torus("", 1, 0.4, 20, 20, Math.PI * 2)).ToMesh();
                Node torus = scene.RootNode.CreateChildNode("torus", m);
                torus.Material = new PhongMaterial() { DiffuseColor = new Vector3(Color.Cornsilk) };
                torus.Transform.Translation = new Vector3(2, 1, 1);

                { 
                    // Create a blue box don't cast shadows
                    m = (new Box()).ToMesh();
                    m.CastShadows = false;
                    Node box = scene.RootNode.CreateChildNode("box", m);
                    box.Material = new PhongMaterial() { DiffuseColor = new Vector3(Color.Blue) };
                    box.Transform.Translation = new Vector3(2, 1, -1);
                }
                {
                    // Create a red box that don't receive shadow but cast shadows
                    m = (new Box()).ToMesh();
                    m.ReceiveShadows = false;
                    Node box = scene.RootNode.CreateChildNode("box", m);
                    box.Material = new PhongMaterial() { DiffuseColor = new Vector3(Color.Red) };
                    box.Transform.Translation = new Vector3(-2, 1, 1);
                }
                camera.ParentNode.Transform.Translation = new Vector3(10, 10, 10);
                camera.LookAt = Vector3.Origin;
                ImageRenderOptions opt = new ImageRenderOptions() { EnableShadows = true };
                scene.Render(camera, "CastAndReceiveShadow_out.png", new Size(1024, 1024), ImageFormat.Png, opt);

渲染结果