# Model I/O Enumerations ## Topics ### Enumerations [`enum MDLCameraProjection`](/documentation/ModelIO/MDLCameraProjection) Options for camera projection styles, used by the [`projection`](/documentation/ModelIO/MDLCamera/projection) property. [`enum MDLGeometryType`](/documentation/ModelIO/MDLGeometryType) Types of geometric primitives for rendering a submesh, used by the [`geometryType`](/documentation/ModelIO/MDLSubmesh/geometryType) property. [`enum MDLIndexBitDepth`](/documentation/ModelIO/MDLIndexBitDepth) Options for the size of integer data in a submesh’s index buffer, used by the [`indexType`](/documentation/ModelIO/MDLSubmesh/indexType) property. [`enum MDLLightType`](/documentation/ModelIO/MDLLightType) Options for the shape and style of illumination provided by a light, used by the [`lightType`](/documentation/ModelIO/MDLLight/lightType) property. [`enum MDLMaterialFace`](/documentation/ModelIO/MDLMaterialFace) [`enum MDLMaterialMipMapFilterMode`](/documentation/ModelIO/MDLMaterialMipMapFilterMode) Modes for sampling textures at sizes between mipmap levels, used by the [`mipFilter`](/documentation/ModelIO/MDLTextureFilter/mipFilter) property. [`enum MDLMaterialPropertyType`](/documentation/ModelIO/MDLMaterialPropertyType) Options for the data type of a material property, used by the [`type`](/documentation/ModelIO/MDLMaterialProperty/type) property. [`enum MDLMaterialSemantic`](/documentation/ModelIO/MDLMaterialSemantic) Options for the semantic use of a material property’s value in rendering a particular surface appearance; used by the [`semantic`](/documentation/ModelIO/MDLMaterialProperty/semantic) property. [`enum MDLMaterialTextureFilterMode`](/documentation/ModelIO/MDLMaterialTextureFilterMode) Modes for sampling textures at coordinates between texels, used by the [`minFilter`](/documentation/ModelIO/MDLTextureFilter/minFilter) and [`magFilter`](/documentation/ModelIO/MDLTextureFilter/magFilter) properties. [`enum MDLMaterialTextureWrapMode`](/documentation/ModelIO/MDLMaterialTextureWrapMode) Modes for sampling textures at coordinates outside the texture bounds, used by the [`sWrapMode`](/documentation/ModelIO/MDLTextureFilter/sWrapMode), [`tWrapMode`](/documentation/ModelIO/MDLTextureFilter/tWrapMode), and [`rWrapMode`](/documentation/ModelIO/MDLTextureFilter/rWrapMode) properties. [`enum MDLMeshBufferType`](/documentation/ModelIO/MDLMeshBufferType) Options for the content of a mesh buffer, used by the [`type`](/documentation/ModelIO/MDLMeshBuffer/type) property and by [`MDLMeshBufferAllocator`](/documentation/ModelIO/MDLMeshBufferAllocator) methods for creating buffers. [`enum MDLProbePlacement`](/documentation/ModelIO/MDLProbePlacement) Options affecting automatic placement of light probes in a scene, used with the [`placeLightProbes(withDensity:heuristic:using:)`](/documentation/ModelIO/MDLAsset/placeLightProbes(withDensity:heuristic:using:)) method. [`enum MDLTextureChannelEncoding`](/documentation/ModelIO/MDLTextureChannelEncoding) Options for the data size and type of texel channel values, used by the [`channelEncoding`](/documentation/ModelIO/MDLTexture/channelEncoding) property. [`enum MDLVertexFormat`](/documentation/ModelIO/MDLVertexFormat) Descriptions of the data size and layout for a vertex attribute, used by the [`format`](/documentation/ModelIO/MDLVertexAttribute/format) property. [`enum MDLAnimatedValueInterpolation`](/documentation/ModelIO/MDLAnimatedValueInterpolation) [`enum MDLDataPrecision`](/documentation/ModelIO/MDLDataPrecision) [`enum MDLTransformOpRotationOrder`](/documentation/ModelIO/MDLTransformOpRotationOrder) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)