FGFS-4.1/OpenSceneGraph
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Work in progress on perspective view dependant codes

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This commit is contained in:
Robert Osfield
2007-06-12 08:30:41 +00:00
parent f64e8b2a96
commit 3eb4c3baa6
1 changed files with 44 additions and 9 deletions
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53
src/osgSim/OverlayNode.cpp
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@@ -999,6 +999,7 @@ OverlayNode::OverlayData& OverlayNode::getOverlayData(osgUtil::CullVisitor* cv)
{
program->addShader(osg::Shader::readShaderFile(osg::Shader::VERTEX, vertexShaderFile));
}
#if 0
else
{
char vertexShaderSource[] =
@@ -1013,7 +1014,7 @@ OverlayNode::OverlayData& OverlayNode::getOverlayData(osgUtil::CullVisitor* cv)
osg::Shader* vertex_shader = new osg::Shader(osg::Shader::VERTEX, vertexShaderSource);
program->addShader(vertex_shader);
}
#endif
}
@@ -1294,8 +1295,6 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
osg::BoundingSphere bs = _overlaySubgraph->getBound();
// push the stateset.
cv->pushStateSet(overlayData._mainSubgraphStateSet.get());
@@ -1355,7 +1354,7 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
}
if (overlayData._geode.valid() && overlayData._geode->getNumDrawables()>0)
if (overlayData._geode.valid() && overlayData._geode->getNumDrawables()>18)
{
overlayData._geode->removeDrawables(0, 3);
}
@@ -1458,10 +1457,13 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
if (usePerspectiveShaders)
{
osg::notify(osg::NOTICE)<<"ratio = "<<ratio<<std::endl;
double original_width = max_side-min_side;
double minRatio = 0.01;
double minRatio = 0.;
if (ratio<minRatio) ratio = minRatio;
osg::notify(osg::NOTICE)<<" new ratio = "<<ratio<<std::endl;
double base_up = min_up - (max_up - min_up) * ratio / (1.0 - ratio);
double max_side_over_up = 0.0;
for(i=0; i< projectedVertices.size(); ++i)
@@ -1476,8 +1478,36 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
min_side = mid_side - max_half_width;
max_side = mid_side + max_half_width;
double new_width = max_side-min_side;
osg::notify(osg::NOTICE)<<" width ratio = "<<new_width/original_width<<std::endl;
osg::notify(osg::NOTICE)<<" near ratio = "<<ratio * new_width/original_width<<std::endl;
osg::notify(osg::NOTICE)<<" angle = "<<2.0*osg::RadiansToDegrees(atan(max_side_over_up))<<std::endl;
osg::Vec3d v000 = osg::Vec3d(-1.0, -1.0, -1.0) * inverseMVP;
osg::Vec3d v010 = osg::Vec3d(-1.0, 1.0, -1.0) * inverseMVP;
osg::Vec3d v100 = osg::Vec3d(1.0, -1.0, -1.0) * inverseMVP;
osg::Vec3d v110 = osg::Vec3d(1.0, 1.0, -1.0) * inverseMVP;
osg::Vec3d v001 = osg::Vec3d(-1.0, -1.0, 1.0) * inverseMVP;
osg::Vec3d v011 = osg::Vec3d(-1.0, 1.0, 1.0) * inverseMVP;
osg::Vec3d v101 = osg::Vec3d(1.0, -1.0, 1.0) * inverseMVP;
osg::Vec3d v111 = osg::Vec3d(1.0, 1.0, 1.0) * inverseMVP;
osg::Vec3d edgeBottomLeft = v001-v000;
osg::Vec3d edgeBottomRight = v101-v100;
osg::Vec3d edgeTopRight = v111-v110;
osg::Vec3d edgeTopLeft = v011-v010;
edgeBottomLeft.normalize();
edgeBottomRight.normalize();
edgeTopLeft.normalize();
edgeTopRight.normalize();
double frustumDiagonal = osg::RadiansToDegrees(acos(edgeBottomLeft * edgeBottomRight));
osg::notify(osg::NOTICE)<<" frustum base angle = "<<frustumDiagonal<<std::endl;
osg::notify(osg::NOTICE)<<"max_side_over_up = "<<max_side_over_up<<std::endl;
double y0 = -(1.0+ratio)/(1.0-ratio); // suspect
double inverse_one_minus_y0 = 1.0/(1-y0);
@@ -1485,16 +1515,22 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
overlayData._y0->set(static_cast<float>(y0));
overlayData._inverse_one_minus_y0->set(static_cast<float>(inverse_one_minus_y0));
osg::notify(osg::NOTICE)<<"y0 = "<<y0<<std::endl;
osg::notify(osg::NOTICE)<<"inverse_one_minus_y0 = "<<inverse_one_minus_y0<<std::endl;
//osg::notify(osg::NOTICE)<<"y0 = "<<y0<<std::endl;
//osg::notify(osg::NOTICE)<<"inverse_one_minus_y0 = "<<inverse_one_minus_y0<<std::endl;
overlayData._mainSubgraphStateSet->setAttribute(overlayData._mainSubgraphProgram.get());
osg::Matrixd projection;
projection.makeOrtho(min_side,max_side,min_up,max_up,-bs.radius(),bs.radius());
camera->setProjectionMatrix(projection);
}
else
{
overlayData._mainSubgraphStateSet->removeAttribute(osg::StateAttribute::PROGRAM);
camera->setProjectionMatrixAsOrtho(min_side,max_side,min_up,max_up,-bs.radius(),bs.radius());
}
@@ -1510,7 +1546,6 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
osg::notify(osg::NOTICE)<<" delta_up = "<<max_up-min_up<<std::endl;
osg::notify(osg::NOTICE)<<" delta_side = "<<max_side-min_side<<std::endl;
#endif
camera->setProjectionMatrixAsOrtho(min_side,max_side,min_up,max_up,-bs.radius(),bs.radius());
if (em)
{