diff options
Diffstat (limited to 'offapi/com/sun/star/geometry/Matrix2D.idl')
-rw-r--r-- | offapi/com/sun/star/geometry/Matrix2D.idl | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/offapi/com/sun/star/geometry/Matrix2D.idl b/offapi/com/sun/star/geometry/Matrix2D.idl new file mode 100644 index 000000000000..2011ba0b2353 --- /dev/null +++ b/offapi/com/sun/star/geometry/Matrix2D.idl @@ -0,0 +1,93 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2008 by Sun Microsystems, Inc. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: Matrix2D.idl,v $ + * $Revision: 1.5 $ + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ +#ifndef __com_sun_star_geometry_Matrix2D_idl__ +#define __com_sun_star_geometry_Matrix2D_idl__ + +module com { module sun { module star { module geometry { + +/** This structure defines a 2 by 2 matrix.<p> + + This constitutes a linear mapping of a point in 2D to another + point in 2D.<p> + + The matrix defined by this structure constitutes a linear + mapping of a point in 2D to another point in 2D. In contrast to + the <type>com.sun.star.geometry.AffineMatrix2D</type>, this + matrix does not include any translational components.<p> + + A linear mapping, as performed by this matrix, can be written out + as follows, where <code>xs</code> and <code>ys</code> are the source, and + <code>xd</code> and <code>yd</code> the corresponding result coordinates: + + <code> + xd = m00*xs + m01*ys; + yd = m10*xs + m11*ys; + </code><p> + + Thus, in common matrix language, with M being the + <type>Matrix2D</type> and vs=[xs,ys]^T, vd=[xd,yd]^T two 2D + vectors, the linear mapping is written as + vd=M*vs. Concatenation of transformations amounts to + multiplication of matrices, i.e. a scaling, given by S, + followed by a rotation, given by R, is expressed as vd=R*(S*vs) in + the above notation. Since matrix multiplication is associative, + this can be shortened to vd=(R*S)*vs=M'*vs. Therefore, a set of + consecutive transformations can be accumulated into a single + Matrix2D, by multiplying the current transformation with the + additional transformation from the left.<p> + + 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.<p> + + @since OOo 2.0.0 + */ +struct Matrix2D +{ + /// The top, left matrix entry. + double m00; + + /// The top, right matrix entry. + double m01; + + /// The bottom, left matrix entry. + double m10; + + /// The bottom, right matrix entry. + double m11; +}; + +}; }; }; }; + +#endif |