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Xenkoで3Dモデルの輪郭線を描画する
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| using System; | |
| using System.Collections.Generic; | |
| using System.Linq; | |
| using System.Text; | |
| using System.Threading.Tasks; | |
| using SiliconStudio.Core.Mathematics; | |
| using SiliconStudio.Xenko.Input; | |
| using SiliconStudio.Xenko.Engine; | |
| using SiliconStudio.Xenko.Rendering; | |
| using SiliconStudio.Xenko.Rendering.Materials; | |
| using SiliconStudio.Xenko.Rendering.Materials.ComputeColors; | |
| namespace MyGame | |
| { | |
| // Xenko 2.1.0.3で動作を確認 | |
| // MaterialPassを使用 | |
| // | |
| // ModelComponentを持ってるEntityに追加して使用する | |
| // スペースキーで輪郭線有り無しを切り替える | |
| public class OutlineScript : SyncScript | |
| { | |
| // 輪郭線が表示されてるかどうか | |
| public bool IsOutlined = true; | |
| // 輪郭線の色 | |
| public Color4 Color = new Color4(0f, 1f, 0f, 1f); | |
| // 輪郭線の大きさ | |
| public float Intensity = 0.01f; | |
| // 表示切替用のキー | |
| public Keys SwitchKey = Keys.Space; | |
| private ModelComponent modelComponent; | |
| private Material outlineMaterial; | |
| // 色と大きさを指定して輪郭線用のマテリアルを作成 | |
| private Material CreateOutlineMaterial(Color4 color, float intensity) | |
| { | |
| var materialDescriptor = new MaterialDescriptor | |
| { | |
| Attributes = new MaterialAttributes | |
| { | |
| Displacement = new MaterialDisplacementMapFeature | |
| { | |
| DisplacementMap = new ComputeFloat(1f), | |
| Intensity = new ComputeFloat(intensity), | |
| ScaleAndBias = true, | |
| Stage = DisplacementMapStage.Vertex, | |
| }, | |
| DiffuseModel = new MaterialDiffuseLambertModelFeature(), | |
| Diffuse = new MaterialDiffuseMapFeature | |
| { | |
| DiffuseMap = new ComputeColor(color), | |
| }, | |
| CullMode = SiliconStudio.Xenko.Graphics.CullMode.Front, | |
| }, | |
| }; | |
| return Material.New(GraphicsDevice, materialDescriptor); | |
| } | |
| // 輪郭線の大きさを変更 | |
| private void SetDisplacementIntensityValue(ParameterCollection parameters, float value) | |
| { | |
| // Parameters.Set(MaterialKeys.DisplacementIntensityValue, value)ではうまくいかない(?) | |
| var keyInfo = parameters.ParameterKeyInfos.Where(k => k.Key.Name == "Material.DisplacementValue.i3").First(); | |
| Buffer.BlockCopy(BitConverter.GetBytes(value), 0, parameters.DataValues, keyInfo.Offset, sizeof(float)); | |
| } | |
| public override void Start() | |
| { | |
| var intensity = IsOutlined ? Intensity: 0f; | |
| modelComponent = Entity.Get<ModelComponent>(); | |
| outlineMaterial = CreateOutlineMaterial(Color, intensity); | |
| foreach (var m in modelComponent.Model.Materials) | |
| { | |
| m.Material.Passes.Add(new MaterialPass(outlineMaterial.Passes[0].Parameters) | |
| { | |
| PassIndex = 1, | |
| BlendState = null, | |
| TessellationMethod = XenkoTessellationMethod.None, | |
| IsLightDependent = true, | |
| HasTransparency = false, | |
| CullMode = SiliconStudio.Xenko.Graphics.CullMode.Front, | |
| }); | |
| } | |
| } | |
| public override void Update() | |
| { | |
| if (Input.IsKeyPressed(SwitchKey)) | |
| { | |
| IsOutlined = !IsOutlined; | |
| var value = IsOutlined ? Intensity: 0f; | |
| foreach (var m in modelComponent.Model.Materials) | |
| { | |
| SetDisplacementIntensityValue(m.Material.Passes[1].Parameters, value); | |
| } | |
| } | |
| } | |
| } | |
| } |
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