/*

 Copyright (C) 2014 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

         Utility for loading OBJ model files

 */

#import <Foundation/Foundation.h>

#define AAPLOBJModelObjectDefaultKey    @"AAPLOBJModelObjectDefaultKey"

#define AAPLOBJModelGroupDefaultKey     @"AAPLOBJModelGroupDefaultKey"

typedef enum _AAPLObjVertexAttributeType

{

    AAPLObjVertexAttributeTypePosition = 0,

    AAPLObjVertexAttributeTypeNormal,

    AAPLObjVertexAttributeTypeColor,

    AAPLObjVertexAttributeTypeTexcoord0,

    AAPLObjVertexAttributeTypeTexcoord1,

    AAPLObjVertexAttributeTypeTangent,

    AAPLObjVertexAttributeTypeBitangent,

} AAPLObjVertexAttributeType;

@class AAPLOBJModelGroup;

@class AAPLObjVertexAttribute;

@class AAPLObjMaterial;

@class AAPLObjMaterialUsage;

#pragma mark -

#pragma mark AAPLOBJModel

#pragma mark -

@interface AAPLOBJModel : NSObject

- (id)initWithContentsOfFile:(NSString *)inputFilePath computeTangentSpace:(BOOL)computeTangentSpace normalizeNormals:(BOOL)normalizeNormals;

@property (readonly) size_t vertexDataAllocElementSize;

// A copy of the file path passed into initWithContentsOfFile

@property (readonly) NSString *filePath;

// An array of strings.

@property (readonly) NSArray *comments;

// An array of all the AAPLObjMaterials found during parsing

@property (readonly) NSArray *materials;

@property (readonly) NSData *vertexData;

// An array of AAPLObjVertexAttributes

@property (readonly) NSArray *vertexDataAttributes;

// A dictionary whose values are a dictionary of 'objects'. Each object dictionary contains a set of one or more groups

// whose type are AAPLOBJModelGroup objects.

//

// The objects member always contains the default 'object' object for the key, AAPLOBJModelObjectDefaultKey.

// Groups without objects will be stored here.

//

// Every object dictionary will contain the default 'group' object for the key, AAPLOBJModelGroupDefaultKey.

// Definitions without groups will be stored here.

@property (readonly) NSDictionary *objects;

@end

#pragma mark -

#pragma mark AAPLOBJModelGroup

#pragma mark -

@interface AAPLOBJModelGroup : NSObject

{

@public

    NSString *name;

    NSData *indexData;

    void *indexDataInternal;

    size_t bytesPerIndex;

    size_t indexCount;

    NSMutableArray *materialUsages;

    int *rawFaceData;

    size_t rawFaceDataAllocElementSize;

    int currentRawFaceIndex;

    int actualRawFaceVertexCount;

}

@property (readonly) NSString *name;

@property (readonly) NSData *indexData;

@property (readonly) size_t bytesPerIndex;

@property (readonly) size_t indexCount;

// An array of AAPLObjMaterialUsage objects

@property (readonly) NSArray *materialUsages;

@end

#pragma mark -

#pragma mark AAPLObjVertexAttribute

#pragma mark -

@interface AAPLObjVertexAttribute : NSObject

{

@public

    AAPLObjVertexAttributeType indexType;

    int size;

    size_t stride;

    size_t offset;

}

@property (readonly) AAPLObjVertexAttributeType indexType;

@property (readonly) int size;

@property (readonly) size_t stride;

@property (readonly) size_t offset;

@end

#pragma mark -

#pragma mark AAPLObjMaterial

#pragma mark -

@interface AAPLObjMaterial : NSObject

{

@public

    NSString *name;

    NSValue *ambientColor;

    float ambientColorArray[3];

    NSValue *diffuseColor;

    float diffuseColorArray[3];

    NSValue *specularColor;

    float specularColorArray[3];

    NSNumber *specularExponent;

    NSNumber *indexOfRefraction;

    NSNumber *illuminationModel;

    NSNumber *dissolve;

    NSNumber *transparency;

    NSValue *transmissionFilter;

    float transmissionFilterArray[3];

    NSString *ambientMapName;

    NSString *diffuseMapName;

    NSString *specularMapName;

    NSString *bumpMapName;

}

@property (readonly) NSString *name; // newmtl

@property (readonly) NSValue *ambientColor; // Ka, pointer to array of 3 floats

@property (readonly) NSValue *diffuseColor; // Kd, pointer to array of 3 floats

@property (readonly) NSValue *specularColor; // Ks, pointer to array of 3 floats

@property (readonly) NSNumber *specularExponent; // Ns, float from 0 to 1000

@property (readonly) NSNumber *indexOfRefraction; // Ni, float from 0.001 to 10

@property (readonly) NSNumber *illuminationModel; // illum, int from 0 to 10

@property (readonly) NSNumber *dissolve; // d, float from 0.0 to 1.0

@property (readonly) NSNumber *transparency; // Tr, float from 0.0 to 1.0

@property (readonly) NSValue *transmissionFilter; // Tf, pointer to array of 3 floats

@property (readonly) NSString *ambientMapName; // map_Ka

@property (readonly) NSString *diffuseMapName; // map_Kd

@property (readonly) NSString *specularMapName; // map_Ks

@property (readonly) NSString *bumpMapName; // map_bump

@end

#pragma mark -

#pragma mark AAPLObjMaterialUsage

#pragma mark -

@interface AAPLObjMaterialUsage : NSObject

{

@public

    NSString *name;

    AAPLObjMaterial *material;

    NSRange indexRange;

}

@property (readonly) NSString *name;

@property (readonly) AAPLObjMaterial *material;

@property (readonly) NSRange indexRange;

@end