//
//  Vector2.m
//  XNI
//
//  Created by Matej Jan on 9.9.10.
//  Copyright 2010 Retronator. All rights reserved.
//

#import "Vector2.h"

#import "Retronator.Xni.Framework.h"

@implementation Vector2

// CONSTRUCTORS

- (id) initWithX:(float)x y:(float)y {
    if (self = [super init]) {
        data = Vector2Make(x, y);
    }
    return self;
}

- (id) initWithVector2Struct: (Vector2Struct*)vectorData {
    if (self = [super init]) {
        data = *vectorData;
    }
    return self;
}

- (id) initWithVector2: (Vector2*)vector {
    return [self initWithVector2Struct:vector.data];  
}

- (id) initWithCoder:(NSCoder *)aDecoder {
    return [self initWithX:[aDecoder decodeFloatForKey:@"x"] y:[aDecoder decodeFloatForKey:@"y"]];
}

- (void)encodeWithCoder:(NSCoder *)aCoder {
    [aCoder encodeFloat:data.x forKey:@"x"];
    [aCoder encodeFloat:data.y forKey:@"y"];
}

+ (Vector2*) vectorWithX:(float)x y:(float)y{
    return [[[Vector2 alloc] initWithX:x y:y] autorelease];
}

+ (Vector2*) vectorWithStruct: (Vector2Struct*)vectorData {
    return [[[Vector2 alloc] initWithVector2Struct:vectorData] autorelease];
}

+ (Vector2*) vectorWithVector: (Vector2*)vector {
    return [[[Vector2 alloc] initWithVector2:vector] autorelease];
}

// PROPERTIES

- (float) x {return data.x;}
- (void) setX:(float)value {data.x = value;}

- (float) y {return data.y;}
- (void) setY:(float)value {data.y = value;}

- (Vector2Struct*) data {return &data;}

// METHODS

+ (Vector2*) normalize:(Vector2*)value {
    Vector2Struct resultData = *value.data;
    Vector2Normalize(&resultData);
    return [Vector2 vectorWithStruct:&resultData];
}

+ (Vector2*) negate:(Vector2*)value {
    Vector2Struct resultData = *value.data;
    Vector2Negate(&resultData);
    return [Vector2 vectorWithStruct:&resultData];    
}

+ (Vector2*) add:(Vector2*)value1 to:(Vector2*)value2 {
    Vector2Struct resultData;
    Vector2Add(value1.data, value2.data, &resultData);
    return [Vector2 vectorWithStruct:&resultData];
}

+ (Vector2*) subtract:(Vector2*)value1 by:(Vector2*)value2 {
    Vector2Struct resultData;
    Vector2Subtract(value1.data, value2.data, &resultData);
    return [Vector2 vectorWithStruct:&resultData];    
}

+ (Vector2*) multiply:(Vector2*)value by:(float)scalar {
    Vector2Struct resultData;
    Vector2Multiply(value.data, scalar, &resultData);
    return [Vector2 vectorWithStruct:&resultData];    
}

+ (float) dotProductOf:(Vector2*)value1 with:(Vector2*)value2 {
    return Vector2DotProduct(value1.data, value2.data);
}

+ (Vector2*) transform:(Vector2*)value with:(Matrix*)matrix {
    Vector2Struct resultData;
    Vector2Transform(value.data, matrix.data, &resultData);
    return [Vector2 vectorWithStruct:&resultData];
}

+ (Vector2*) transformNormal:(Vector2*)value with:(Matrix*)matrix {
    Vector2Struct resultData;
    Vector2TransformNormal(value.data, matrix.data, &resultData);
    return [Vector2 vectorWithStruct:&resultData];
}

+ (Vector2*) lerp:(Vector2*)value1 to:(Vector2*)value2 by:(float)amount {
    Vector2Struct resultData;
    Vector2Lerp(value1.data, value2.data, amount, &resultData);
    return [Vector2 vectorWithStruct:&resultData];    
}


- (float) length {
    return Vector2Length(self.data);
}

- (float) lengthSquared {
    return Vector2LengthSquared(self.data);
}

- (Vector2*) normalize {
    Vector2Normalize(&data);
    return self;
}
- (Vector2*) negate {
    Vector2Negate(&data);
    return self;
}

- (Vector2*) set:(Vector2 *)value {
	data = *value.data;
	return self;
}

- (Vector2*) add:(Vector2*)value {
    Vector2Add(self.data, value.data, self.data);
    return self;
}

- (Vector2*) subtract:(Vector2*)value {
    Vector2Subtract(self.data, value.data, self.data);
    return self;
}

- (Vector2*) multiplyBy:(float)scalar {
    Vector2Multiply(self.data, scalar, self.data);
    return self;
}

- (Vector2*) transformWith:(Matrix*)matrix {
    Vector2Transform(self.data, matrix.data, self.data);
    return self;
}

- (Vector2*) transformNormalWith:(Matrix*)matrix {
    Vector2TransformNormal(self.data, matrix.data, self.data);
    return self;
}

- (id) copyWithZone:(NSZone *)zone {
	return [[Vector2 allocWithZone:zone] initWithVector2Struct:&data];
}

- (BOOL) equals:(Vector2*)vector {
	if (!vector) return NO;
	return vector.data->x == data.x && vector.data->y == data.y;
}

- (BOOL) isEqual:(id)object {
    if ([object isKindOfClass:[Vector2 class]]) {
        return [self equals:object];
    }
    return NO;
}

- (NSString *) description {
    return [NSString stringWithFormat:@"Vector(%f, %f)", data.x, data.y];
}

// Constants

+ (Vector2*) zero {return [Vector2 vectorWithX:0 y:0];}
+ (Vector2*) one {return [Vector2 vectorWithX:1 y:1];}
+ (Vector2*) unitX {return [Vector2 vectorWithX:1 y:0];}
+ (Vector2*) unitY {return [Vector2 vectorWithX:0 y:1];}

@end