bool TextBase::computeMatrix(osg::Matrix& matrix, osg::State* state) const
{
if (state && (_characterSizeMode!=OBJECT_COORDS || _autoRotateToScreen))
{
osg::Matrix modelview = state->getModelViewMatrix();
osg::Matrix projection = state->getProjectionMatrix();
matrix.makeTranslate(-_offset);
osg::Matrix rotate_matrix;
if (_autoRotateToScreen)
{
osg::Matrix temp_matrix(modelview);
temp_matrix.setTrans(0.0f,0.0f,0.0f);
rotate_matrix.invert(temp_matrix);
}
matrix.postMultRotate(_rotation);
if (_characterSizeMode!=OBJECT_COORDS)
{
osg::Matrix M(rotate_matrix);
M.postMultTranslate(_position);
M.postMult(modelview);
osg::Matrix& P = projection;
// compute the pixel size vector.
// pre adjust P00,P20,P23,P33 by multiplying them by the viewport window matrix.
// here we do it in short hand with the knowledge of how the window matrix is formed
// note P23,P33 are multiplied by an implicit 1 which would come from the window matrix.
// Robert Osfield, June 2002.
int width = 1280;
int height = 1024;
const osg::Viewport* viewport = state->getCurrentViewport();
if (viewport)
{
width = static_cast<int>(viewport->width());
height = static_cast<int>(viewport->height());
}
// scaling for horizontal pixels
float P00 = P(0,0)*width*0.5f;
float P20_00 = P(2,0)*width*0.5f + P(2,3)*width*0.5f;
osg::Vec3 scale_00(M(0,0)*P00 + M(0,2)*P20_00,
M(1,0)*P00 + M(1,2)*P20_00,
M(2,0)*P00 + M(2,2)*P20_00);
// scaling for vertical pixels
float P10 = P(1,1)*height*0.5f;
float P20_10 = P(2,1)*height*0.5f + P(2,3)*height*0.5f;
osg::Vec3 scale_10(M(0,1)*P10 + M(0,2)*P20_10,
M(1,1)*P10 + M(1,2)*P20_10,
M(2,1)*P10 + M(2,2)*P20_10);
float P23 = P(2,3);
float P33 = P(3,3);
float pixelSizeVector_w = M(3,2)*P23 + M(3,3)*P33;
float pixelSizeVert=(_characterHeight*sqrtf(scale_10.length2()))/(pixelSizeVector_w*0.701f);
float pixelSizeHori=(_characterHeight/getCharacterAspectRatio()*sqrtf(scale_00.length2()))/(pixelSizeVector_w*0.701f);
// avoid nasty math by preventing a divide by zero
if (pixelSizeVert == 0.0f)
pixelSizeVert= 1.0f;
if (pixelSizeHori == 0.0f)
pixelSizeHori= 1.0f;
if (_glyphNormalized)
{
osg::Vec3 scaleVec(_characterHeight/getCharacterAspectRatio(), _characterHeight, _characterHeight);
matrix.postMultScale(scaleVec);
}
if (_characterSizeMode==SCREEN_COORDS)
{
float scale_font_vert=_characterHeight/pixelSizeVert;
float scale_font_hori=_characterHeight/getCharacterAspectRatio()/pixelSizeHori;
if (P10<0)
scale_font_vert=-scale_font_vert;
matrix.postMultScale(osg::Vec3f(scale_font_hori, scale_font_vert, scale_font_hori));
}
else if (pixelSizeVert>getFontHeight())
{
float scale_font = getFontHeight()/pixelSizeVert;
matrix.postMultScale(osg::Vec3f(scale_font, scale_font, scale_font));
}
}
if (_autoRotateToScreen)
{
matrix.postMult(rotate_matrix);
}
matrix.postMultTranslate(_position);
}
else if (!_rotation.zeroRotation())
{
matrix.makeTranslate(-_offset);
if (_glyphNormalized)
{
osg::Vec3 scaleVec(_characterHeight/getCharacterAspectRatio(), _characterHeight, _characterHeight);
matrix.postMultScale(scaleVec);
}
matrix.postMultRotate(_rotation);
matrix.postMultTranslate(_position);
// OSG_NOTICE<<"New Need to rotate "<<matrix<<std::endl;
}
else
{
matrix.makeTranslate(-_offset);
if (_glyphNormalized)
{
osg::Vec3 scaleVec(_characterHeight/getCharacterAspectRatio(), _characterHeight, _characterHeight);
matrix.postMultScale(scaleVec);
}
matrix.postMultTranslate(_position);
}
if (_matrix!=matrix)
{
_matrix = matrix;
const_cast<TextBase*>(this)->dirtyBound();
}
return true;
}
bool AntiSquish::computeUnSquishedMatrix(osg::Matrix& unsquished) const
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock( _cacheLock );
osg::NodePathList nodePaths = getParentalNodePaths();
if (nodePaths.empty()) return false;
osg::NodePath np = nodePaths.front();
if (np.empty()) return false;
// Remove the last node which is the anti squish node itself.
np.pop_back();
// Get the accumulated modeling matrix.
const osg::Matrix localToWorld = osg::computeLocalToWorld(np);
// reuse cached value
if ( !_cacheDirty && _cacheLocalToWorld==localToWorld )
{
unsquished = _cache;
return true;
}
osg::Vec3d t, s;
osg::Quat r, so;
localToWorld.decompose(t, r, s, so);
// Let's take an average of the scale.
double av = (s[0] + s[1] + s[2])/3.0;
s[0] = av; s[1] = av; s[2]=av;
if (av == 0)
return false;
//
// Final Matrix: [-Pivot][SO]^[S][SO][R][T][Pivot][LOCALTOWORLD]^[position]
// OR [SO]^[S][SO][R][T][LOCALTOWORLD]^
//
if (_usePivot)
{
unsquished.postMultTranslate(-_pivot);
osg::Matrix tmps, invtmps;
so.get(tmps);
if (!invtmps.invert(tmps))
return false;
//SO^
unsquished.postMult(invtmps);
//S
unsquished.postMultScale(s);
//SO
unsquished.postMult(tmps);
//R
unsquished.postMultRotate(r);
//T
unsquished.postMultTranslate(t);
osg::Matrix invltw;
if (!invltw.invert(localToWorld))
return false;
// LTW^
unsquished.postMult( invltw );
// Position
if (_usePosition)
unsquished.postMultTranslate(_position);
else
unsquished.postMultTranslate(_pivot);
}
else
{
osg::Matrix tmps, invtmps;
so.get(tmps);
if (!invtmps.invert(tmps))
return false;
unsquished.postMult(invtmps);
unsquished.postMultScale(s);
unsquished.postMult(tmps);
unsquished.postMultRotate(r);
unsquished.postMultTranslate(t);
osg::Matrix invltw;
if (!invltw.invert(localToWorld))
return false;
unsquished.postMult( invltw );
}
if (unsquished.isNaN())
return false;
_cache = unsquished;
_cacheLocalToWorld = localToWorld;
_cacheDirty = false;
//As Transform::computeBounde calls us without a node-path it relies on
//The cache. Hence a new _cache affects the bound.
const_cast<AntiSquish*>(this)->dirtyBound();
return true;
}
bool TextBase::computeMatrix(osg::Matrix& matrix, osg::State* state) const
{
if (state && (_characterSizeMode!=OBJECT_COORDS || _autoRotateToScreen))
{
osg::Matrix modelview = state->getModelViewMatrix();
osg::Matrix projection = state->getProjectionMatrix();
osg::Matrix temp_matrix(modelview);
temp_matrix.setTrans(0.0,0.0,0.0);
osg::Matrix rotate_matrix;
rotate_matrix.invert(temp_matrix);
matrix.makeTranslate(-_offset);
matrix.postMultRotate(_rotation);
if (_characterSizeMode!=OBJECT_COORDS)
{
typedef osg::Matrix::value_type value_type;
value_type width = 1280.0;
value_type height = 1024.0;
const osg::Viewport* viewport = state->getCurrentViewport();
if (viewport)
{
width = static_cast<value_type>(viewport->width());
height = static_cast<value_type>(viewport->height());
}
osg::Matrix mvpw = rotate_matrix * osg::Matrix::translate(_position) * modelview * projection * osg::Matrix::scale(width/2.0, height/2.0, 1.0);
osg::Vec3d origin = osg::Vec3d(0.0, 0.0, 0.0) * mvpw;
osg::Vec3d left = osg::Vec3d(1.0, 0.0, 0.0) * mvpw - origin;
osg::Vec3d up = osg::Vec3d(0.0, 1.0, 0.0) * mvpw - origin;
// compute the pixel size vector.
value_type length_x = left.length();
value_type scale_x = length_x>0.0 ? 1.0/length_x : 1.0;
value_type length_y = up.length();
value_type scale_y = length_y>0.0 ? 1.0/length_y : 1.0;
if (_glyphNormalized)
{
osg::Vec3 scaleVec(_characterHeight/getCharacterAspectRatio(), _characterHeight, _characterHeight);
matrix.postMultScale(scaleVec);
}
if (_characterSizeMode==SCREEN_COORDS)
{
matrix.postMultScale(osg::Vec3(scale_x, scale_y, scale_x));
}
else
{
value_type pixelSizeVert = _characterHeight / scale_y;
// avoid nasty math by preventing a divide by zero
if (pixelSizeVert == 0.0)
pixelSizeVert = 1.0;
if (pixelSizeVert>getFontHeight())
{
value_type scale_font = getFontHeight()/pixelSizeVert;
matrix.postMultScale(osg::Vec3f(scale_font, scale_font, scale_font));
}
}
}
if (_autoRotateToScreen)
{
matrix.postMult(rotate_matrix);
}
matrix.postMultTranslate(_position);
}
else if (!_rotation.zeroRotation())
{
matrix.makeTranslate(-_offset);
if (_glyphNormalized)
{
osg::Vec3 scaleVec(_characterHeight/getCharacterAspectRatio(), _characterHeight, _characterHeight);
matrix.postMultScale(scaleVec);
}
matrix.postMultRotate(_rotation);
matrix.postMultTranslate(_position);
// OSG_NOTICE<<"New Need to rotate "<<matrix<<std::endl;
}
else
{
matrix.makeTranslate(-_offset);
if (_glyphNormalized)
{
osg::Vec3 scaleVec(_characterHeight/getCharacterAspectRatio(), _characterHeight, _characterHeight);
matrix.postMultScale(scaleVec);
}
matrix.postMultTranslate(_position);
}
if (_matrix!=matrix)
{
_matrix = matrix;
const_cast<TextBase*>(this)->dirtyBound();
}
return true;
}