From ed5640d8b587fbcfed7dd7967f3de04b37a76f26 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:06:44 +0200 Subject: Adding upstream version 4:7.4.7. Signed-off-by: Daniel Baumann --- offapi/com/sun/star/geometry/AffineMatrix2D.idl | 87 +++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 offapi/com/sun/star/geometry/AffineMatrix2D.idl (limited to 'offapi/com/sun/star/geometry/AffineMatrix2D.idl') diff --git a/offapi/com/sun/star/geometry/AffineMatrix2D.idl b/offapi/com/sun/star/geometry/AffineMatrix2D.idl new file mode 100644 index 000000000..1d7df6fc0 --- /dev/null +++ b/offapi/com/sun/star/geometry/AffineMatrix2D.idl @@ -0,0 +1,87 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ +#ifndef __com_sun_star_geometry_AffineMatrix2D_idl__ +#define __com_sun_star_geometry_AffineMatrix2D_idl__ + +module com { module sun { module star { module geometry { + +/** This structure defines a 2 by 3 affine matrix.

+ + The matrix defined by this structure constitutes an affine mapping + of a point in 2D to another point in 2D. The last line of a + complete 3 by 3 matrix is omitted, since it is implicitly assumed + to be [0,0,1].

+ + An affine mapping, as performed by this matrix, can be written out + as follows, where xs and ys are the source, and + xd and yd the corresponding result coordinates: + + + xd = m00*xs + m01*ys + m02; + yd = m10*xs + m11*ys + m12; +

+ + Thus, in common matrix language, with M being the + AffineMatrix2D and vs=[xs,ys]^T, vd=[xd,yd]^T two 2D + vectors, the affine transformation is written as + vd=M*vs. Concatenation of transformations amounts to + multiplication of matrices, i.e. a translation, given by T, + followed by a rotation, given by R, is expressed as vd=R*(T*vs) in + the above notation. Since matrix multiplication is associative, + this can be shortened to vd=(R*T)*vs=M'*vs. Therefore, a set of + consecutive transformations can be accumulated into a single + AffineMatrix2D, by multiplying the current transformation with the + additional transformation from the left.

+ + Due to this transformational approach, all geometry data types are + points in abstract integer or real coordinate spaces, without any + physical dimensions attached to them. This physical measurement + units are typically only added when using these data types to + render something onto a physical output device, like a screen or a + printer, Then, the total transformation matrix and the device + resolution determine the actual measurement unit.

+ + @since OOo 2.0 + */ +struct AffineMatrix2D +{ + /// The top, left matrix entry. + double m00; + + /// The top, middle matrix entry. + double m01; + + /// The top, right matrix entry. + double m02; + + /// The bottom, left matrix entry. + double m10; + + /// The bottom, middle matrix entry. + double m11; + + /// The bottom, right matrix entry. + double m12; +}; + +}; }; }; }; + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ -- cgit v1.2.3