/*
* Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#import "OF4x4Matrix.h"
#import "OFString.h"
static const float identityValues[16] = {
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
};
static OF4x4Matrix *identity;
@implementation OF4x4Matrix
+ (void)initialize
{
if (self != [OF4x4Matrix class])
return;
identity = [[OF4x4Matrix alloc] initWithValues: identityValues];
}
+ (OF4x4Matrix *)identity
{
return identity;
}
+ (instancetype)matrixWithValues: (const float [16])values
{
return [[[self alloc] initWithValues: values] autorelease];
}
- (instancetype)initWithValues: (const float [16])values
{
self = [super init];
memcpy(_values, values, 16 * sizeof(float));
return self;
}
- (float *)values
{
return _values;
}
- (bool)isEqual: (OF4x4Matrix *)matrix
{
if (![matrix isKindOfClass: [OF4x4Matrix class]])
return false;
return (memcmp(_values, matrix->_values, 16 * sizeof(float)) == 0);
}
- (unsigned long)hash
{
unsigned long hash;
OFHashInit(&hash);
for (size_t i = 0; i < 16; i++)
OFHashAddHash(&hash, OFFloatToRawUInt32(_values[i]));
OFHashFinalize(&hash);
return hash;
}
- (void)transpose
{
float copy[16];
memcpy(copy, _values, 16 * sizeof(float));
_values[1] = copy[4];
_values[2] = copy[8];
_values[3] = copy[12];
_values[4] = copy[1];
_values[6] = copy[9];
_values[7] = copy[13];
_values[8] = copy[2];
_values[9] = copy[6];
_values[11] = copy[14];
_values[12] = copy[3];
_values[13] = copy[7];
_values[14] = copy[11];
}
- (OFString *)description
{
return [OFString stringWithFormat:
@"<OF4x4Matrix: {\n"
@"\t%g %g %g %g\n"
@"\t%g %g %g %g\n"
@"\t%g %g %g %g\n"
@"\t%g %g %g %g\n"
@"}>",
_values[0], _values[4], _values[8], _values[12],
_values[1], _values[5], _values[9], _values[13],
_values[2], _values[6], _values[10], _values[14],
_values[3], _values[7], _values[11], _values[15]];
}
@end