# MetalPerformanceShaders Structures ## Topics ### Structures [`MPSAxisAlignedBoundingBox`](/documentation/MetalPerformanceShaders/MPSAxisAlignedBoundingBox-c.struct) An axis-aligned bounding box. [`MPSCustomKernelArgumentCount`](/documentation/MetalPerformanceShaders/MPSCustomKernelArgumentCount) A structure that contains the number of destination, source, and broadcaset textures used by a custom kernel. [`MPSCustomKernelInfo`](/documentation/MetalPerformanceShaders/MPSCustomKernelInfo) [`MPSCustomKernelSourceInfo`](/documentation/MetalPerformanceShaders/MPSCustomKernelSourceInfo) [`MPSDimensionSlice`](/documentation/MetalPerformanceShaders/MPSDimensionSlice) [`MPSImageCoordinate`](/documentation/MetalPerformanceShaders/MPSImageCoordinate) [`MPSImageRegion`](/documentation/MetalPerformanceShaders/MPSImageRegion) [`MPSIntegerDivisionParams`](/documentation/MetalPerformanceShaders/MPSIntegerDivisionParams) Parameters that define the parts of a division operation. [`MPSIntersectionDistance`](/documentation/MetalPerformanceShaders/MPSIntersectionDistance) An intersection result that contains the distance from the ray origin to the intersection point. [`MPSIntersectionDistancePrimitiveIndex`](/documentation/MetalPerformanceShaders/MPSIntersectionDistancePrimitiveIndex) An intersection result that contains the distance from the ray origin to the intersection point, and the index of the intersected primitive. [`MPSIntersectionDistancePrimitiveIndexBufferIndex`](/documentation/MetalPerformanceShaders/MPSIntersectionDistancePrimitiveIndexBufferIndex) [`MPSIntersectionDistancePrimitiveIndexBufferIndexCoordinates`](/documentation/MetalPerformanceShaders/MPSIntersectionDistancePrimitiveIndexBufferIndexCoordinates) [`MPSIntersectionDistancePrimitiveIndexBufferIndexInstanceIndex`](/documentation/MetalPerformanceShaders/MPSIntersectionDistancePrimitiveIndexBufferIndexInstanceIndex) [`MPSIntersectionDistancePrimitiveIndexBufferIndexInstanceIndexCoordinates`](/documentation/MetalPerformanceShaders/MPSIntersectionDistancePrimitiveIndexBufferIndexInstanceIndexCoordinates) [`MPSIntersectionDistancePrimitiveIndexCoordinates`](/documentation/MetalPerformanceShaders/MPSIntersectionDistancePrimitiveIndexCoordinates) An intersection result that contains the origin-intersection distance, intersected primitive index, and intersection point coordinates. [`MPSIntersectionDistancePrimitiveIndexInstanceIndex`](/documentation/MetalPerformanceShaders/MPSIntersectionDistancePrimitiveIndexInstanceIndex) An intersection result that contains the origin-intersection distance, and intersected primitive and instance indices. [`MPSIntersectionDistancePrimitiveIndexInstanceIndexCoordinates`](/documentation/MetalPerformanceShaders/MPSIntersectionDistancePrimitiveIndexInstanceIndexCoordinates) An intersection result that contains the origin-intersection distance, intersected primitive and instance indices, and intersection point coordinates. [`MPSMatrixCopyOffsets`](/documentation/MetalPerformanceShaders/MPSMatrixCopyOffsets) A description of matrix copy operations. [`MPSMatrixOffset`](/documentation/MetalPerformanceShaders/MPSMatrixOffset) A description of row and column offsets into a matrix. [`MPSNDArrayOffsets`](/documentation/MetalPerformanceShaders/MPSNDArrayOffsets) [`MPSNDArraySizes`](/documentation/MetalPerformanceShaders/MPSNDArraySizes) [`MPSPackedFloat3`](/documentation/MetalPerformanceShaders/MPSPackedFloat3-c.struct) A packed three-element vector. [`MPSRayOriginDirection`](/documentation/MetalPerformanceShaders/MPSRayOriginDirection) A 3D ray with an origin and a direction. [`MPSRayOriginMaskDirectionMaxDistance`](/documentation/MetalPerformanceShaders/MPSRayOriginMaskDirectionMaxDistance) A 3D ray with an origin, a direction, and a mask to filter out intersections. [`MPSRayOriginMinDistanceDirectionMaxDistance`](/documentation/MetalPerformanceShaders/MPSRayOriginMinDistanceDirectionMaxDistance) A 3D ray with an origin, a direction, and an intersection distance range from the origin. [`MPSRayPackedOriginDirection`](/documentation/MetalPerformanceShaders/MPSRayPackedOriginDirection) [`MPSStateTextureInfo`](/documentation/MetalPerformanceShaders/MPSStateTextureInfo) An encapsulation of a texture’s dimensions, format, type, and usage. --- 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)