+++ /dev/null
-/* === S Y N F I G ========================================================= */
-/*! \file matrix.h
-** \brief Matrix definitions for 2D affine transformations
-**
-** $Id$
-**
-** \legal
-** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-** Copyright (c) 2008 Carlos López
-**
-** This package is free software; you can redistribute it and/or
-** modify it under the terms of the GNU General Public License as
-** published by the Free Software Foundation; either version 2 of
-** the License, or (at your option) any later version.
-**
-** This package 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
-** General Public License for more details.
-** \endlegal
-*/
-/* ========================================================================= */
-
-/* === S T A R T =========================================================== */
-
-#ifndef __SYNFIG_MATRIX_H
-#define __SYNFIG_MATRIX_H
-
-/* === H E A D E R S ======================================================= */
-
-#include "angle.h"
-#include "real.h"
-#include "vector.h"
-#include <math.h>
-
-/* === M A C R O S ========================================================= */
-
-
-#ifdef WIN32
-#include <float.h>
-#ifndef isnan
-extern "C" { int _isnan(double x); }
-#define isnan _isnan
-#endif
-#endif
-
-// For some reason isnan() isn't working on macosx any more.
-// This is a quick fix.
-#if defined(__APPLE__) && !defined(SYNFIG_ISNAN_FIX)
-#ifdef isnan
-#undef isnan
-#endif
-inline bool isnan(double x) { return x != x; }
-inline bool isnan(float x) { return x != x; }
-#define SYNFIG_ISNAN_FIX 1
-#endif
-
-
-/* === T Y P E D E F S ===================================================== */
-
-/* === C L A S S E S & S T R U C T S ======================================= */
-
-namespace synfig {
-
-/*! \class Matrix
-** \todo writeme
-*/
-class Matrix
-{
-public:
- typedef Real value_type;
-
-private:
- //! The matrix array
- value_type m00, m01, m02;
- value_type m10, m11, m12;
- value_type m20, m21, m22;
- // Index convention
- // 00 01 02
- // 10 11 12
- // 20 21 22
- // vectors are premultiplied when the matrix transformation is applied
- // we consider the vectors as [1]x[3] arrays.
- // [1]x[3] * [3]x[3] = [1]x[3]
- // vector * matrix = vector
- // In affine transformation matrixes the values of
- // m02=0, m12=0 and m22=1 for non projective transformations.
-
-public:
- //!Deafult constructor makes a identity matrix
- Matrix() {
- m00=1.0; m01=0.0; m02=0.0;
- m10=0.0; m11=1.0; m12=0.0;
- m20=0.0; m21=0.0; m22=1.0;
- }
-
- //!Constructor from Angle create a rotate matrix
- Matrix(const Angle &a){
- (*this).set_rotate(a);
- }
- //!set_identity member. Set an identity matrix
- Matrix &
- set_identity(){
- m00=1.0; m01=0.0; m02=0.0;
- m10=0.0; m11=1.0; m12=0.0;
- m20=0.0; m21=0.0; m22=1.0;
- return (*this);
- }
- //!set_scale member fucntion. Sets a scale matrix
- //! @param sx Scale by X axis
- //! @param sy Scale by Y axis
- //! @return A matrix reference filled with the sx, sy values
- Matrix &
- set_scale(const value_type &sx, const value_type &sy){
- m00=sx; m01=0.0; m02=0.0;
- m10=0.0; m11=sy; m12=0.0;
- m20=0.0; m21=0.0; m22=1.0;
- return (*this);
- }
- //!set_rotate member function. Sets a rotate matrix
- //! @param a Rotation angle counterclock wise
- //! @return A matrix reference filled with the proper rotation parameters
- Matrix &
- set_rotate(const Angle &a){
- value_type c(Angle::cos(a).get());
- value_type s(Angle::sin(a).get());
- m00= c; m01=s; m02=0.0;
- m10=-1.0*s; m11=c; m12=0.0;
- m20=0.0; m21=0.0; m22=1.0;
- return (*this);
- }
- //!traslate member function. Sets a translate matrix
- //! @param t Vector that defines the translation
- //! @return A matrix reference filled with the proper translation parameters
- Matrix &
- set_translate(const Vector &t){
- m00=1.0; m01=0.0; m02=0.0;
- m10=0.0; m11=1.0; m12=0.0;
- m20=t[0]; m21=t[1]; m22=1.0;
- return (*this);
- }
-
- //!get_transformed member function.
- //! @param v 2D Vector to transform
- //! @return The Vector result
- Vector
- get_transformed(const Vector &v){
- return Vector(v[0]*m00+v[1]*m10+m20,v[0]*m01+v[1]*m11+m21);
- }
-
- //! operator *. Multiplication of one matrix by other
- //! @param rhs the right hand side of the multiplication operation
- //! @return the resulting multiplication matrix
- Matrix
- operator *(const Matrix &rhs){
- Matrix ret;
- ret.m00=m00*rhs.m00 + m01*rhs.m10 + m02*rhs.m20;
- ret.m01=m00*rhs.m01 + m01*rhs.m11 + m02*rhs.m21;
- ret.m02=m00*rhs.m02 + m01*rhs.m12 + m02*rhs.m22;
-
- ret.m10=m10*rhs.m00 + m11*rhs.m10 + m12*rhs.m20;
- ret.m11=m10*rhs.m01 + m11*rhs.m11 + m12*rhs.m21;
- ret.m12=m10*rhs.m02 + m11*rhs.m12 + m12*rhs.m22;
-
- ret.m20=m20*rhs.m00 + m21*rhs.m10 + m22*rhs.m20;
- ret.m21=m20*rhs.m01 + m21*rhs.m11 + m22*rhs.m21;
- ret.m22=m20*rhs.m02 + m21*rhs.m12 + m22*rhs.m22;
- return ret;
- }
-
- //! operator *=. Multiplication and assign of one matrix by a number
- //! @param rhs the number to multiply by
- //! @return the modifed resulting multiplicated by number matrix
- Matrix
- operator *=(const value_type &rhs){
- m00*=rhs;
- m01*=rhs;
- m02*=rhs;
-
- m10*=rhs;
- m11*=rhs;
- m12*=rhs;
-
- m20*=rhs;
- m21*=rhs;
- m22*=rhs;
- return *this;
- }
-
- //! operator +=. Sum and assign of two matrixes
- //! @param rhs the matrix to sum
- //! @return modified matrix with the summed matrix
- Matrix
- operator +=(const Matrix &rhs){
- m00+=rhs.m00;
- m01+=rhs.m01;
- m02+=rhs.m02;
-
- m10+=rhs.m10;
- m11+=rhs.m11;
- m12+=rhs.m12;
-
- m20+=rhs.m20;
- m21+=rhs.m21;
- m22+=rhs.m22;
- return *this;
- }
-
- //! operator *. Multiplication of one matrix by a number
- //! @param rhs the number to multiply by
- //! @return the resulting multiplicated by number matrix
- Matrix
- operator *(const value_type &rhs){
- return Matrix(*this)*=rhs;
- }
-
- //! operator +=. Sum and assign of two matrixes
- //! @param rhs the matrix to sum
- //! @return modified matrix with the summed matrix
- Matrix
- operator +(const Matrix &rhs){
- return Matrix(*this)+=rhs;
- }
-
-};
-
-}; // END of namespace synfig
-
-#endif
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