diff options
Diffstat (limited to 'basegfx/source/matrix/b2dhommatrix.cxx')
| -rw-r--r-- | basegfx/source/matrix/b2dhommatrix.cxx | 174 |
1 files changed, 27 insertions, 147 deletions
diff --git a/basegfx/source/matrix/b2dhommatrix.cxx b/basegfx/source/matrix/b2dhommatrix.cxx index 352113fa8ed3..a7777352effb 100644 --- a/basegfx/source/matrix/b2dhommatrix.cxx +++ b/basegfx/source/matrix/b2dhommatrix.cxx @@ -36,6 +36,9 @@ #include <hommatrixtemplate.hxx> #include <basegfx/tuple/b2dtuple.hxx> #include <basegfx/vector/b2dvector.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> + +/////////////////////////////////////////////////////////////////////////////// namespace basegfx { @@ -60,6 +63,17 @@ namespace basegfx { } + B2DHomMatrix::B2DHomMatrix(double f_0x0, double f_0x1, double f_0x2, double f_1x0, double f_1x1, double f_1x2) + : mpImpl( IdentityMatrix::get() ) // use common identity matrix, will be made unique with 1st set-call + { + mpImpl->set(0, 0, f_0x0); + mpImpl->set(0, 1, f_0x1); + mpImpl->set(0, 2, f_0x2); + mpImpl->set(1, 0, f_1x0); + mpImpl->set(1, 1, f_1x1); + mpImpl->set(1, 2, f_1x2); + } + B2DHomMatrix& B2DHomMatrix::operator=(const B2DHomMatrix& rMat) { mpImpl = rMat.mpImpl; @@ -81,6 +95,16 @@ namespace basegfx mpImpl->set(nRow, nColumn, fValue); } + void B2DHomMatrix::set3x2(double f_0x0, double f_0x1, double f_0x2, double f_1x0, double f_1x1, double f_1x2) + { + mpImpl->set(0, 0, f_0x0); + mpImpl->set(0, 1, f_0x1); + mpImpl->set(0, 2, f_0x2); + mpImpl->set(1, 0, f_1x0); + mpImpl->set(1, 1, f_1x1); + mpImpl->set(1, 2, f_1x2); + } + bool B2DHomMatrix::isLastLineDefault() const { return mpImpl->isLastLineDefault(); @@ -206,56 +230,9 @@ namespace basegfx if(!fTools::equalZero(fRadiant)) { double fSin(0.0); - double fCos(0.0); - - // is the rotation angle an approximate multiple of pi/2? - // If yes, force fSin/fCos to -1/0/1, to maintain - // orthogonality (which might also be advantageous for the - // other cases, but: for multiples of pi/2, the exact - // values _can_ be attained. It would be largely - // unintuitive, if a 180 degrees rotation would introduce - // slight roundoff errors, instead of exactly mirroring - // the coordinate system). - if( fTools::equalZero( fmod( fRadiant, F_PI2 ) ) ) - { - // determine quadrant - const sal_Int32 nQuad( - (4 + fround( 4/F_2PI*fmod( fRadiant, F_2PI ) )) % 4 ); - switch( nQuad ) - { - case 0: // -2pi,0,2pi - fSin = 0.0; - fCos = 1.0; - break; - - case 1: // -3/2pi,1/2pi - fSin = 1.0; - fCos = 0.0; - break; - - case 2: // -pi,pi - fSin = 0.0; - fCos = -1.0; - break; - - case 3: // -1/2pi,3/2pi - fSin = -1.0; - fCos = 0.0; - break; - - default: - OSL_ENSURE( false, - "B2DHomMatrix::rotate(): Impossible case reached" ); - } - } - else - { - // TODO(P1): Maybe use glibc's sincos here (though - // that's kinda non-portable...) - fSin = sin(fRadiant); - fCos = cos(fRadiant); - } + double fCos(1.0); + tools::createSinCosOrthogonal(fSin, fCos, fRadiant); Impl2DHomMatrix aRotMat; aRotMat.set(0, 0, fCos); @@ -474,104 +451,7 @@ namespace basegfx return true; } - -/* Old version: Used 3D decompose when shaer was involved and also a determinant test - (but only in that case). Keeping as comment since it also worked and to allow a - fallback in case the new version makes trouble somehow. Definitely missing in the 2nd - case is the sign correction for Y-Scale, this would need to be added following the above - pattern - - bool B2DHomMatrix::decompose(B2DTuple& rScale, B2DTuple& rTranslate, double& rRotate, double& rShearX) const - { - // when perspective is used, decompose is not made here - if(!mpImpl->isLastLineDefault()) - return false; - - // test for rotation and shear - if(fTools::equalZero(get(0, 1)) - && fTools::equalZero(get(1, 0))) - { - // no rotation and shear, direct value extraction - rRotate = rShearX = 0.0; - - // copy scale values - rScale.setX(get(0, 0)); - rScale.setY(get(1, 1)); - - // copy translation values - rTranslate.setX(get(0, 2)); - rTranslate.setY(get(1, 2)); - - return true; - } - else - { - // test if shear is zero. That's the case, if the unit vectors in the matrix - // are perpendicular -> scalar is zero - const ::basegfx::B2DVector aUnitVecX(get(0, 0), get(1, 0)); - const ::basegfx::B2DVector aUnitVecY(get(0, 1), get(1, 1)); - - if(fTools::equalZero(aUnitVecX.scalar(aUnitVecY))) - { - // no shear, direct value extraction - rShearX = 0.0; - - // calculate rotation - rShearX = 0.0; - rRotate = atan2(aUnitVecX.getY(), aUnitVecX.getX()); - - // calculate scale values - rScale.setX(aUnitVecX.getLength()); - rScale.setY(aUnitVecY.getLength()); - - // copy translation values - rTranslate.setX(get(0, 2)); - rTranslate.setY(get(1, 2)); - - return true; - } - else - { - // If determinant is zero, decomposition is not possible - if(0.0 == determinant()) - return false; - - // copy 2x2 matrix and translate vector to 3x3 matrix - ::basegfx::B3DHomMatrix a3DHomMat; - - a3DHomMat.set(0, 0, get(0, 0)); - a3DHomMat.set(0, 1, get(0, 1)); - a3DHomMat.set(1, 0, get(1, 0)); - a3DHomMat.set(1, 1, get(1, 1)); - a3DHomMat.set(0, 3, get(0, 2)); - a3DHomMat.set(1, 3, get(1, 2)); - - ::basegfx::B3DTuple r3DScale, r3DTranslate, r3DRotate, r3DShear; - - if(a3DHomMat.decompose(r3DScale, r3DTranslate, r3DRotate, r3DShear)) - { - // copy scale values - rScale.setX(r3DScale.getX()); - rScale.setY(r3DScale.getY()); - - // copy shear - rShearX = r3DShear.getX(); - - // copy rotate - rRotate = r3DRotate.getZ(); - - // copy translate - rTranslate.setX(r3DTranslate.getX()); - rTranslate.setY(r3DTranslate.getY()); - - return true; - } - } - } - - return false; - } */ - } // end of namespace basegfx +/////////////////////////////////////////////////////////////////////////////// // eof |