Unity使用FBXSDK 读取模型注意事项

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本文最后更新于2020年8月2日 10:46，如果文章内容失效，请反馈给我们，谢谢！

坐标系的转换

	FbxAxisSystem unityAxisSystem(FbxAxisSystem::eYAxis, FbxAxisSystem::eParityOdd, FbxAxisSystem::eRightHanded);
	if (sceneAxisSystem != unityAxisSystem)
		unityAxisSystem.ConvertScene(lScene);

FbxAxisSystem unityAxisSystem(FbxAxisSystem::eYAxis, FbxAxisSystem::eParityOdd, FbxAxisSystem::eRightHanded);

if (sceneAxisSystem != unityAxisSystem)

unityAxisSystem.ConvertScene(lScene);

void FBXAMatixToUnityMatrix(FBXGameObject* kgo, FbxAMatrix globalMatrix)
{
	kgo->matrix&#91;0] = static_cast&lt;float>(globalMatrix.Double44()&#91;0]&#91;0]);
	kgo->matrix&#91;1] = static_cast&lt;float>(-globalMatrix.Double44()&#91;1]&#91;0]);
	kgo->matrix&#91;2] = static_cast&lt;float>(-globalMatrix.Double44()&#91;2]&#91;0]);
	kgo->matrix&#91;3] = static_cast&lt;float>(-globalMatrix.Double44()&#91;3]&#91;0]);

	kgo->matrix&#91;4] = static_cast&lt;float>(-globalMatrix.Double44()&#91;0]&#91;1]);
	kgo->matrix&#91;5] = static_cast&lt;float>(globalMatrix.Double44()&#91;1]&#91;1]);
	kgo->matrix&#91;6] = static_cast&lt;float>(globalMatrix.Double44()&#91;2]&#91;1]);
	kgo->matrix&#91;7] = static_cast&lt;float>(globalMatrix.Double44()&#91;3]&#91;1]);

	kgo->matrix&#91;8] = static_cast&lt;float>(-globalMatrix.Double44()&#91;0]&#91;2]);
	kgo->matrix&#91;9] = static_cast&lt;float>(globalMatrix.Double44()&#91;1]&#91;2]);
	kgo->matrix&#91;10] = static_cast&lt;float>(globalMatrix.Double44()&#91;2]&#91;2]);
	kgo->matrix&#91;11] = static_cast&lt;float>(globalMatrix.Double44()&#91;3]&#91;2]);

	kgo->matrix&#91;12] = static_cast&lt;float>(globalMatrix.Double44()&#91;0]&#91;3]);
	kgo->matrix&#91;13] = static_cast&lt;float>(globalMatrix.Double44()&#91;1]&#91;3]);
	kgo->matrix&#91;14] = static_cast&lt;float>(globalMatrix.Double44()&#91;2]&#91;3]);
	kgo->matrix&#91;15] = static_cast&lt;float>(globalMatrix.Double44()&#91;3]&#91;3]);
}

void FBXAMatixToUnityMatrix(FBXGameObject* kgo, FbxAMatrix globalMatrix)

{

kgo->matrix[0] = static_cast<float>(globalMatrix.Double44()[0][0]);

kgo->matrix[1] = static_cast<float>(-globalMatrix.Double44()[1][0]);

kgo->matrix[2] = static_cast<float>(-globalMatrix.Double44()[2][0]);

kgo->matrix[3] = static_cast<float>(-globalMatrix.Double44()[3][0]);

kgo->matrix[4] = static_cast<float>(-globalMatrix.Double44()[0][1]);

kgo->matrix[5] = static_cast<float>(globalMatrix.Double44()[1][1]);

kgo->matrix[6] = static_cast<float>(globalMatrix.Double44()[2][1]);

kgo->matrix[7] = static_cast<float>(globalMatrix.Double44()[3][1]);

kgo->matrix[8] = static_cast<float>(-globalMatrix.Double44()[0][2]);

kgo->matrix[9] = static_cast<float>(globalMatrix.Double44()[1][2]);

kgo->matrix[10] = static_cast<float>(globalMatrix.Double44()[2][2]);

kgo->matrix[11] = static_cast<float>(globalMatrix.Double44()[3][2]);

kgo->matrix[12] = static_cast<float>(globalMatrix.Double44()[0][3]);

kgo->matrix[13] = static_cast<float>(globalMatrix.Double44()[1][3]);

kgo->matrix[14] = static_cast<float>(globalMatrix.Double44()[2][3]);

kgo->matrix[15] = static_cast<float>(globalMatrix.Double44()[3][3]);

}

单位转换

	//转换为米

if (SceneSystemUnit != FbxSystemUnit::m)
	{
		const FbxSystemUnit::ConversionOptions lConversionOptions = {
			false, /* mConvertRrsNodes */
			true, /* mConvertAllLimits */
			true, /* mConvertClusters */
			true, /* mConvertLightIntensity */
			true, /* mConvertPhotometricLProperties */
			true /* mConvertCameraClipPlanes */
		};

		FbxSystemUnit::m.ConvertScene(lScene, lConversionOptions);
	}