ObjFW  Check-in [1e550fabe3]

/**
 * @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 Transforms the specified 3D vector according to the matrix.
 *
 * As multiplying a 4x4 matrix with a 3D vector is not defined, this extends
 * the 3D vector to a 4D vector with its `w` value being set to 0 and just
 * discards the `w` value of the resulting 4D vector for the returned 3D
 * vector. This allows reducing the number number of calculations performed and
 * is mostly useful for 3D graphics.
 *
 * @param vector The 3D vector to transform
 * @return The transformed 3D vector
 */
- (OFVector3D)transformedVector3D: (OFVector3D)vector;
@end

OF_ASSUME_NONNULL_END

	    matrix->_values[10] * copy[14] +
	    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];
}

- (OFVector3D)transformedVector3D: (OFVector3D)vector
{
	return OFMakeVector3D(
	    _values[0] * vector.x + _values[4] * vector.y +
	    _values[8] * vector.z,
	    _values[1] * vector.x + _values[5] * vector.y +
	    _values[9] * vector.z,
	    _values[2] * vector.x + _values[6] * vector.y +
	    _values[10] * vector.z);
}

- (OFString *)description
{
	return [OFString stringWithFormat:
	    @"<OFMatrix4x4: {\n"
	    @"\t%g %g %g %g\n"
	    @"\t%g %g %g %g\n"

static OFString *const module = @"OFMatrix4x4Tests";

@implementation TestsAppDelegate (OFMatrix4x4Tests)
- (void)matrix4x4Tests
{
	void *pool = objc_autoreleasePoolPush();
	OFMatrix4x4 *matrix, *matrix2;
	OFVector3D vec3;

	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(@"-[transformedVector3D:]",
	    R((vec3 = [matrix transformedVector3D: OFMakeVector3D(1, 2, 3)])) &&
	    vec3.x == 14 && vec3.y == 38 && vec3.z == 62)

	objc_autoreleasePoolPop(pool);
}
@end