AssetPostprocessor.OnPreprocessCameraDescription(CameraDescription,Camera, AnimationClip[])

参数

说明

将此函数添加到子类以在从模型导入器导入相机时接收通知。

仅当 ModelImporter.importCameras 为真时，Unity 才调用此函数。此函数让您在模型导入过程中控制相机属性和动画。CameraDescription 结构包含从导入文件中的所有相机数据。您可以使用它填充相机、其 GameObject 和动画剪辑。

// The following code example shows how Unity uses this function to set up a perspective camera from an imported FBX file.


using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using UnityEditor.AssetImporters;

public class SetupCameraFromCameraDescription : AssetPostprocessor
{
    void OnPreprocessCameraDescription(CameraDescription description, Camera camera, AnimationClip[] clips)
    {
        var modelImporter = assetImporter as ModelImporter;
        var globalScale = modelImporter.globalScale;

        description.TryGetProperty("NearPlane", out float nearPlane);
        description.TryGetProperty("FarPlane", out float farPlane);
        description.TryGetProperty("ApertureMode", out int apertureMode);
        description.TryGetProperty("FilmWidth", out float filmWidth);
        description.TryGetProperty("FilmHeight", out float filmHeight);
        description.TryGetProperty("FocalLength", out float focalLength);

        if (nearPlane >= 0)
            camera.nearClipPlane = nearPlane * globalScale;
        if (farPlane >= 0)
            camera.farClipPlane = farPlane * globalScale;

        float fov = 0;
        switch (apertureMode)
        {
            case 0:
                description.TryGetProperty("FieldOfViewY", out fov);
                camera.fieldOfView = fov;
                break;
            case 1:
                description.TryGetProperty("FieldOfView", out float alphaH);
                alphaH /= 2;
                float focal = (filmWidth * 25.4f) / 2 / Mathf.Tan(alphaH * Mathf.Deg2Rad);
                float alphaV = Mathf.Atan((filmHeight * 25.4f) / 2 / focal) * Mathf.Rad2Deg;
                camera.fieldOfView = alphaV * 2;
                break;
            case 2:
                description.TryGetProperty("FieldOfView", out fov);
                camera.fieldOfView = fov;
                break;
            case 3:

                if (focalLength != .0f)
                {
                    float apertureWidth = filmHeight * 25.4f;
                    fov = Mathf.Atan((apertureWidth / focalLength) * 0.5f) * 2.0f * Mathf.Rad2Deg;
                }
                break;
        }

        camera.fieldOfView = fov;
    }
}