433 lines
18 KiB
C++
433 lines
18 KiB
C++
// -*-c++-*-
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#include "ReaderWriterVRML2.h"
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#include <complex>
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#if defined(_MSC_VER)
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# pragma warning(disable: 4250)
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# pragma warning(disable: 4290)
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# pragma warning(disable: 4800)
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#endif
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#include <openvrml/vrml97node.h>
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#include <openvrml/common.h>
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#include <openvrml/node.h>
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#include <openvrml/node_ptr.h>
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#include <openvrml/field.h>
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#include <osg/CullFace>
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osg::ref_ptr<osg::Geometry> ReaderWriterVRML2::convertVRML97Box(openvrml::vrml97_node::box_node* vrml_box) const
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{
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const openvrml::vec3f& size = static_cast<const openvrml::sfvec3f&>(vrml_box->field("size")).value;
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osg::Vec3 halfSize(size[0] * 0.5f, size[1] * 0.5f, size[2] * 0.5f);
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BoxLibrary::const_iterator it = m_boxLibrary.find(halfSize);
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if (it != m_boxLibrary.end())
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{
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return (*it).second.get();
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}
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osg::ref_ptr<osg::Geometry> osg_geom = new osg::Geometry();
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osg::ref_ptr<osg::Vec3Array> osg_vertices = new osg::Vec3Array();
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osg::ref_ptr<osg::Vec2Array> osg_texcoords = new osg::Vec2Array();
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osg::ref_ptr<osg::Vec3Array> osg_normals = new osg::Vec3Array();
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osg::ref_ptr<osg::DrawArrays> box = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
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osg_vertices->push_back(osg::Vec3(-halfSize[0], halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], -halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], -halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], -halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], -halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], -halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], -halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], -halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], -halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], -halfSize[1], halfSize[2]));
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osg_vertices->push_back(osg::Vec3(-halfSize[0], -halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], -halfSize[1], -halfSize[2]));
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osg_vertices->push_back(osg::Vec3(halfSize[0], -halfSize[1], halfSize[2]));
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for (int i = 0; i != 6; ++i)
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{
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osg_texcoords->push_back(osg::Vec2(0.0f, 1.0f));
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osg_texcoords->push_back(osg::Vec2(0.0f, 0.0f));
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osg_texcoords->push_back(osg::Vec2(1.0f, 0.0f));
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osg_texcoords->push_back(osg::Vec2(1.0f, 1.0f));
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}
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osg_normals->push_back(osg::Vec3(0.0f, 0.0f, 1.0f));
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osg_normals->push_back(osg::Vec3(0.0f, 0.0f, -1.0f));
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osg_normals->push_back(osg::Vec3(1.0f, 0.0f, 0.0f));
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osg_normals->push_back(osg::Vec3(-1.0f, 0.0f, 0.0f));
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osg_normals->push_back(osg::Vec3(0.0f, 1.0f, 0.0f));
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osg_normals->push_back(osg::Vec3(0.0f, -1.0f, 0.0f));
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box->setCount(osg_vertices->size());
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osg_geom->addPrimitiveSet(box.get());
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osg_geom->setVertexArray(osg_vertices.get());
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osg_geom->setTexCoordArray(0, osg_texcoords.get());
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osg_geom->setNormalArray(osg_normals.get());
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osg_geom->setNormalBinding(osg::Geometry::BIND_PER_PRIMITIVE);
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osg_geom->getOrCreateStateSet()->setAttributeAndModes(new osg::CullFace(osg::CullFace::BACK));
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m_boxLibrary[halfSize] = osg_geom;
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return osg_geom.get();
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}
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osg::ref_ptr<osg::Geometry> ReaderWriterVRML2::convertVRML97Sphere(openvrml::vrml97_node::sphere_node* vrml_sphere) const
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{
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float radius = static_cast<const openvrml::sffloat&>(vrml_sphere->field("radius")).value;
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SphereLibrary::const_iterator it = m_sphereLibrary.find(radius);
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if (it != m_sphereLibrary.end())
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{
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return (*it).second.get();
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}
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osg::ref_ptr<osg::Geometry> osg_geom = new osg::Geometry();
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osg::ref_ptr<osg::Vec3Array> osg_vertices = new osg::Vec3Array();
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osg::ref_ptr<osg::Vec2Array> osg_texcoords = new osg::Vec2Array();
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osg::ref_ptr<osg::Vec3Array> osg_normals = new osg::Vec3Array();
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unsigned int numSegments = 40;
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unsigned int numRows = 20;
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const float thetaDelta = 2.0f * float(osg::PI) / float(numSegments);
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const float texCoordSDelta = 1.0f / float(numSegments);
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const float phiDelta = float(osg::PI) / float(numRows);
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const float texCoordTDelta = 1.0f / float(numRows);
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float phi = -0.5f * float(osg::PI);
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float texCoordT = 0.0f;
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osg::ref_ptr<osg::DrawArrayLengths> sphere = new osg::DrawArrayLengths(osg::PrimitiveSet::QUAD_STRIP);
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for (unsigned int i = 0; i < numRows; ++i, phi += phiDelta, texCoordT += texCoordTDelta)
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{
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std::complex<float> latBottom = std::polar(1.0f, phi);
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std::complex<float> latTop = std::polar(1.0f, phi + phiDelta);
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std::complex<float> eBottom = latBottom * radius;
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std::complex<float> eTop = latTop * radius;
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float theta = 0.0f;
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float texCoordS = 0.0f;
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for (unsigned int j = 0; j < numSegments; ++j, theta += thetaDelta, texCoordS += texCoordSDelta)
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{
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std::complex<float> n = -std::polar(1.0f, theta);
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osg_normals->push_back(osg::Vec3(latTop.real() * n.imag(), latTop.imag(), latTop.real() * n.real()));
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osg_normals->push_back(osg::Vec3(latBottom.real() * n.imag(), latBottom.imag(), latBottom.real() * n.real()));
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osg_texcoords->push_back(osg::Vec2(texCoordS, texCoordT + texCoordTDelta));
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osg_texcoords->push_back(osg::Vec2(texCoordS, texCoordT));
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osg_vertices->push_back(osg::Vec3(eTop.real() * n.imag(), eTop.imag(), eTop.real() * n.real()));
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osg_vertices->push_back(osg::Vec3(eBottom.real() * n.imag(), eBottom.imag(), eBottom.real() * n.real()));
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}
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osg_normals->push_back(osg::Vec3(0.0f, latTop.imag(), -latTop.real()));
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osg_normals->push_back(osg::Vec3(0.0f, latBottom.imag(), -latBottom.real()));
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osg_texcoords->push_back(osg::Vec2(1.0f, texCoordT + texCoordTDelta));
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osg_texcoords->push_back(osg::Vec2(1.0f, texCoordT));
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osg_vertices->push_back(osg::Vec3(0.0f, eTop.imag(), -eTop.real()));
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osg_vertices->push_back(osg::Vec3(0.0f, eBottom.imag(), -eBottom.real()));
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sphere->push_back(numSegments * 2 + 2);
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}
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osg_geom->addPrimitiveSet(sphere.get());
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osg_geom->setVertexArray(osg_vertices.get());
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osg_geom->setTexCoordArray(0, osg_texcoords.get());
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osg_geom->setNormalArray(osg_normals.get());
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osg_geom->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
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osg_geom->getOrCreateStateSet()->setAttributeAndModes(new osg::CullFace(osg::CullFace::BACK));
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m_sphereLibrary[radius] = osg_geom;
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return osg_geom.get();
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}
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osg::ref_ptr<osg::Geometry> ReaderWriterVRML2::convertVRML97Cone(openvrml::vrml97_node::cone_node* vrml_cone) const
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{
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float height = static_cast<const openvrml::sffloat&>(vrml_cone->field("height")).value;
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float radius = static_cast<const openvrml::sffloat&>(vrml_cone->field("bottomRadius")).value;
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bool bottom = static_cast<const openvrml::sfbool&>(vrml_cone->field("bottom")).value;
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bool side = static_cast<const openvrml::sfbool&>(vrml_cone->field("side")).value;
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QuadricKey key(height, radius, bottom, side, false);
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ConeLibrary::const_iterator it = m_coneLibrary.find(key);
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if (it != m_coneLibrary.end())
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{
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return (*it).second.get();
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}
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osg::ref_ptr<osg::Geometry> osg_geom = new osg::Geometry();
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osg::ref_ptr<osg::Vec3Array> osg_vertices = new osg::Vec3Array();
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osg::ref_ptr<osg::Vec2Array> osg_texcoords = new osg::Vec2Array();
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osg::ref_ptr<osg::Vec3Array> osg_normals = new osg::Vec3Array();
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unsigned int numSegments = 40;
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const float thetaDelta = 2.0f * float(osg::PI) / float(numSegments);
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float topY = height * 0.5f;
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float bottomY = height * -0.5f;
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if (side)
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{
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osg::ref_ptr<osg::DrawArrays> side = new osg::DrawArrays(osg::PrimitiveSet::QUAD_STRIP);
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const float texCoordDelta = 1.0f / float(numSegments);
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float theta = 0.0f;
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float texCoord = 0.0f;
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for (unsigned int i = 0; i < numSegments; ++i, theta += thetaDelta, texCoord += texCoordDelta)
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{
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std::complex<float> n = -std::polar(1.0f, theta);
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std::complex<float> e = n * radius;
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osg::Vec3 normal(n.imag() * height, radius, n.real() * height);
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normal.normalize();
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osg_normals->push_back(normal);
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osg_normals->push_back(normal);
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osg_texcoords->push_back(osg::Vec2(texCoord, 1.0f));
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osg_texcoords->push_back(osg::Vec2(texCoord, 0.0f));
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osg_vertices->push_back(osg::Vec3(0.0f, topY, 0.0f));
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osg_vertices->push_back(osg::Vec3(e.imag(), bottomY, e.real()));
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}
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// do last point by hand to ensure no round off errors.
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osg::Vec3 normal(0.0f, radius, -height);
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normal.normalize();
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osg_normals->push_back(normal);
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osg_normals->push_back(normal);
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osg_texcoords->push_back(osg::Vec2(1.0f, 1.0f));
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osg_texcoords->push_back(osg::Vec2(1.0f, 0.0f));
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osg_vertices->push_back(osg::Vec3(0.0f, topY, 0.0f));
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osg_vertices->push_back(osg::Vec3(0.0f, bottomY, -radius));
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side->setCount(osg_vertices->size());
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osg_geom->addPrimitiveSet(side.get());
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}
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if (bottom)
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{
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osg::ref_ptr<osg::DrawArrays> bottom = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_FAN);
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size_t first = osg_vertices->size();
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bottom->setFirst(first);
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float theta = 0.0f;
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for (unsigned int i = 0; i < numSegments; ++i, theta += thetaDelta)
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{
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std::complex<float> n = -std::polar(1.0f, theta);
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std::complex<float> e = n * radius;
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osg_normals->push_back(osg::Vec3(0.0f, -1.0f, 0.0f));
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osg_texcoords->push_back(osg::Vec2(0.5f - 0.5f * n.imag(), 0.5f + 0.5f * n.real()));
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osg_vertices->push_back(osg::Vec3(-e.imag(), bottomY, e.real()));
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}
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// do last point by hand to ensure no round off errors.
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osg_normals->push_back(osg::Vec3(0.0f, -1.0f, 0.0f));
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osg_texcoords->push_back(osg::Vec2(0.5f, 0.0f));
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osg_vertices->push_back(osg::Vec3(0.0f, bottomY, -radius));
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bottom->setCount(osg_vertices->size() - first);
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osg_geom->addPrimitiveSet(bottom.get());
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}
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osg_geom->setVertexArray(osg_vertices.get());
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osg_geom->setTexCoordArray(0, osg_texcoords.get());
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osg_geom->setNormalArray(osg_normals.get());
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osg_geom->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
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osg_geom->getOrCreateStateSet()->setAttributeAndModes(new osg::CullFace(osg::CullFace::BACK));
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m_coneLibrary[key] = osg_geom;
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return osg_geom.get();
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}
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osg::ref_ptr<osg::Geometry> ReaderWriterVRML2::convertVRML97Cylinder(openvrml::vrml97_node::cylinder_node* vrml_cylinder) const
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{
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float height = static_cast<const openvrml::sffloat&>(vrml_cylinder->field("height")).value;
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float radius = static_cast<const openvrml::sffloat&>(vrml_cylinder->field("radius")).value;
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bool bottom = static_cast<const openvrml::sfbool&>(vrml_cylinder->field("bottom")).value;
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bool side = static_cast<const openvrml::sfbool&>(vrml_cylinder->field("side")).value;
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bool top = static_cast<const openvrml::sfbool&>(vrml_cylinder->field("top")).value;
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QuadricKey key(height, radius, bottom, side, top);
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CylinderLibrary::const_iterator it = m_cylinderLibrary.find(key);
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if (it != m_cylinderLibrary.end())
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{
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return (*it).second.get();
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}
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osg::ref_ptr<osg::Geometry> osg_geom = new osg::Geometry();
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osg::ref_ptr<osg::Vec3Array> osg_vertices = new osg::Vec3Array();
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osg::ref_ptr<osg::Vec2Array> osg_texcoords = new osg::Vec2Array();
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osg::ref_ptr<osg::Vec3Array> osg_normals = new osg::Vec3Array();
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unsigned int numSegments = 40;
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const float thetaDelta = 2.0f * float(osg::PI) / float(numSegments);
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float topY = height * 0.5f;
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float bottomY = height * -0.5f;
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if (side)
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{
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osg::ref_ptr<osg::DrawArrays> side = new osg::DrawArrays(osg::PrimitiveSet::QUAD_STRIP);
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const float texCoordDelta = 1.0f / float(numSegments);
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float theta = 0.0f;
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float texCoord = 0.0f;
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for (unsigned int i = 0; i < numSegments; ++i, theta += thetaDelta, texCoord += texCoordDelta)
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{
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std::complex<float> n = -std::polar(1.0f, theta);
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std::complex<float> e = n * radius;
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osg::Vec3 normal(n.imag(), 0.0f, n.real());
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osg_normals->push_back(normal);
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osg_normals->push_back(normal);
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osg_texcoords->push_back(osg::Vec2(texCoord, 1.0f));
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osg_texcoords->push_back(osg::Vec2(texCoord, 0.0f));
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osg_vertices->push_back(osg::Vec3(e.imag(), topY, e.real()));
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osg_vertices->push_back(osg::Vec3(e.imag(), bottomY, e.real()));
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}
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// do last point by hand to ensure no round off errors.
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osg::Vec3 normal(0.0f, 0.0f, -1.0f);
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osg_normals->push_back(normal);
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osg_normals->push_back(normal);
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osg_texcoords->push_back(osg::Vec2(1.0f, 1.0f));
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osg_texcoords->push_back(osg::Vec2(1.0f, 0.0f));
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osg_vertices->push_back(osg::Vec3(0.0f, topY, -radius));
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osg_vertices->push_back(osg::Vec3(0.0f, bottomY, -radius));
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side->setCount(osg_vertices->size());
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osg_geom->addPrimitiveSet(side.get());
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}
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if (bottom)
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{
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osg::ref_ptr<osg::DrawArrays> bottom = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_FAN);
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size_t first = osg_vertices->size();
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bottom->setFirst(first);
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float theta = 0.0f;
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for (unsigned int i = 0; i < numSegments; ++i, theta += thetaDelta)
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{
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std::complex<float> n = -std::polar(1.0f, theta);
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std::complex<float> e = n * radius;
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osg_normals->push_back(osg::Vec3(0.0f, -1.0f, 0.0f));
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osg_texcoords->push_back(osg::Vec2(0.5f - 0.5f * n.imag(), 0.5f + 0.5f * n.real()));
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osg_vertices->push_back(osg::Vec3(-e.imag(), bottomY, e.real()));
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}
|
|
|
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// do last point by hand to ensure no round off errors.
|
|
|
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osg_normals->push_back(osg::Vec3(0.0f, -1.0f, 0.0f));
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osg_texcoords->push_back(osg::Vec2(0.5f, 0.0f));
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osg_vertices->push_back(osg::Vec3(0.0f, bottomY, -radius));
|
|
|
|
bottom->setCount(osg_vertices->size() - first);
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|
osg_geom->addPrimitiveSet(bottom.get());
|
|
}
|
|
|
|
if (top)
|
|
{
|
|
osg::ref_ptr<osg::DrawArrays> top = new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_FAN);
|
|
|
|
size_t first = osg_vertices->size();
|
|
top->setFirst(first);
|
|
|
|
float theta = 0.0f;
|
|
|
|
for (unsigned int i = 0; i < numSegments; ++i, theta += thetaDelta)
|
|
{
|
|
std::complex<float> n = -std::polar(1.0f, theta);
|
|
std::complex<float> e = n * radius;
|
|
|
|
osg_normals->push_back(osg::Vec3(0.0f, 1.0f, 0.0f));
|
|
osg_texcoords->push_back(osg::Vec2(0.5f + 0.5f * n.imag(), 0.5f - 0.5f * n.real()));
|
|
osg_vertices->push_back(osg::Vec3(e.imag(), topY, e.real()));
|
|
}
|
|
|
|
// do last point by hand to ensure no round off errors.
|
|
|
|
osg_normals->push_back(osg::Vec3(0.0f, 1.0f, 0.0f));
|
|
osg_texcoords->push_back(osg::Vec2(0.5f, 1.0f));
|
|
osg_vertices->push_back(osg::Vec3(0.0f, topY, -radius));
|
|
|
|
top->setCount(osg_vertices->size() - first);
|
|
osg_geom->addPrimitiveSet(top.get());
|
|
}
|
|
|
|
osg_geom->setVertexArray(osg_vertices.get());
|
|
osg_geom->setTexCoordArray(0, osg_texcoords.get());
|
|
osg_geom->setNormalArray(osg_normals.get());
|
|
osg_geom->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
|
|
|
|
osg_geom->getOrCreateStateSet()->setAttributeAndModes(new osg::CullFace(osg::CullFace::BACK));
|
|
|
|
m_cylinderLibrary[key] = osg_geom;
|
|
|
|
return osg_geom.get();
|
|
}
|