ObjFW  Check-in [3e4ed4e59f]

 * @brief Mulitplies the receiver with the specified matrix on the left side
 *	  and the receiver on the right side.
 *
 * @param matrix The matrix to multiply the receiver with
 */
- (void)multiplyWithMatrix: (OFMatrix4x4 *)matrix;

/**
 * @brief Translates the matrix with the specified 3D vector.
 *
 * @param vector The vector to translate the matrix with
 */
- (void)translateWithVector3D: (OFVector3D)vector;

/**
 * @brief Scales the matrix with the specified 3D vector.
 *
 * @param vector The vector to scale the matrix with
 */
- (void)scaleWithVector3D: (OFVector3D)vector;

/**
 * @brief Transforms the specified point in 3D space according to the matrix.
 *
 * @param point The point to transform
 * @return The transformed point
 */
- (OFVector3D)transformedPoint3D: (OFVector3D)point;
@end

OF_ASSUME_NONNULL_END

	    matrix->_values[14] * copy[15];
	_values[15] = matrix->_values[3] * copy[12] +
	    matrix->_values[7] * copy[13] +
	    matrix->_values[11] * copy[14] +
	    matrix->_values[15] * copy[15];
}

- (void)translateWithVector3D: (OFVector3D)vector
{
	OFMatrix4x4 *translation = [[OFMatrix4x4 alloc] initWithValues:
	    (float [16]){
		1, 0, 0, 0,
		0, 1, 0, 0,
		0, 0, 1, 0,
		vector.x, vector.y, vector.z, 1
	    }];
	[self multiplyWithMatrix: translation];
	[translation release];
}

- (void)scaleWithVector3D: (OFVector3D)vector
{
	OFMatrix4x4 *scale = [[OFMatrix4x4 alloc] initWithValues:
	    (float [16]){
		vector.x, 0, 0, 0,
		0, vector.y, 0, 0,
		0, 0, vector.z, 0,
		0, 0, 0, 1
	    }];
	[self multiplyWithMatrix: scale];
	[scale release];
}

- (OFVector3D)transformedPoint3D: (OFVector3D)point
{
	return OFMakeVector3D(
	    _values[0] * point.x + _values[4] * point.y +
	    _values[8] * point.z + _values[12],
	    _values[1] * point.x + _values[5] * point.y +
	    _values[9] * point.z + _values[13],
	    _values[2] * point.x + _values[6] * point.y +
	    _values[10] * point.z + _values[14]);
}

	if (!OFEqualSizes(rect1.size, rect2.size))
		return false;

	return true;
}

/**
 * @struct OFVector3D OFObject.h ObjFW/OFObject.h
 *
 * @brief A vector in 3D space.
 */
typedef struct OF_BOXABLE {
	/** The x coordinate of the vector */
	float x;
	/** The y coordinate of the vector */
	float y;
	/** The z coordinate of the vector */
	float z;
} OFVector3D;

/**
 * @brief Creates a new OFVector3D.
 *
 * @param x The x coordinate of the vector
 * @param y The x coordinate of the vector
 * @param z The z coordinate of the vector
 * @return An OFVector3D with the specified coordinates
 */
static OF_INLINE OFVector3D OF_CONST_FUNC
OFMakeVector3D(float x, float y, float z)
{
	OFVector3D vector = { x, y, z };

	return vector;
}

/**
 * @brief Returns whether the two vectors are equal.
 *
 * @param vector1 The first vector for the comparison
 * @param vector2 The second vectors for the comparison
 * @return Whether the two vectors are equal
 */
static OF_INLINE bool
OFEqualVectors3D(OFVector3D vector1, OFVector3D vector2)
{
	if (vector1.x != vector2.x)
		return false;

	if (vector1.y != vector2.y)
		return false;

	if (vector1.z != vector2.z)
		return false;

	return true;
}

/**
 * @brief Adds the specified byte to the hash.

static OFString *const module = @"OFMatrix4x4Tests";

@implementation TestsAppDelegate (OFMatrix4x4Tests)
- (void)matrix4x4Tests
{
	void *pool = objc_autoreleasePoolPush();
	OFMatrix4x4 *matrix, *matrix2;
	OFVector3D point;

	TEST(@"+[identityMatrix]",
	    memcmp([[OFMatrix4x4 identityMatrix] values], (float [16]){
		1, 0, 0, 0,
		0, 1, 0, 0,
		0, 0, 1, 0,
		0, 0, 0, 1

	    [matrix2 isEqual: [OFMatrix4x4 matrixWithValues: (float [16]){
		 9000, 20200, 31400, 42600,
		10000, 22800, 35600, 48400,
		11000, 25400, 39800, 54200,
		12000, 28000, 44000, 60000
	    }]])

	TEST(@"[-translateWithVector3D:]",
	    R(matrix2 = [OFMatrix4x4 identityMatrix]) &&
	    R([matrix2 translateWithVector3D: OFMakeVector3D(1, 2, 3)]) &&
	    R(point = [matrix2 transformedPoint3D: OFMakeVector3D(2, 3, 4)]) &&
	    point.x == 3 && point.y == 5 && point.z == 7)

	TEST(@"-[scaleWithVector3D:]",
	    R([matrix2 scaleWithVector3D: OFMakeVector3D(-1, 0.5, 2)]) &&
	    R(point = [matrix2 transformedPoint3D: OFMakeVector3D(2, 3, 4)]) &&
	    point.x == -3 && point.y == 2.5 && point.z == 14)

	TEST(@"-[transformedPoint3D:]",
	    R((point = [matrix transformedPoint3D: OFMakeVector3D(1, 2, 3)])) &&
	    point.x == 18 && point.y == 46 && point.z == 74)

	objc_autoreleasePoolPop(pool);
}
@end