MatrixX3f Surface::compute_normals(const MatrixX3f& rr, const MatrixX3i& tris)
{
printf("\tcomputing normals\n");
// first, compute triangle normals
MatrixX3f r1(tris.rows(),3); MatrixX3f r2(tris.rows(),3); MatrixX3f r3(tris.rows(),3);
for(qint32 i = 0; i < tris.rows(); ++i)
{
r1.row(i) = rr.row(tris(i, 0));
r2.row(i) = rr.row(tris(i, 1));
r3.row(i) = rr.row(tris(i, 2));
}
MatrixX3f x = r2 - r1;
MatrixX3f y = r3 - r1;
MatrixX3f tri_nn(x.rows(),y.cols());
tri_nn.col(0) = x.col(1).cwiseProduct(y.col(2)) - x.col(2).cwiseProduct(y.col(1));
tri_nn.col(1) = x.col(2).cwiseProduct(y.col(0)) - x.col(0).cwiseProduct(y.col(2));
tri_nn.col(2) = x.col(0).cwiseProduct(y.col(1)) - x.col(1).cwiseProduct(y.col(0));
// Triangle normals and areas
MatrixX3f tmp = tri_nn.cwiseProduct(tri_nn);
VectorXf normSize = tmp.rowwise().sum();
normSize = normSize.cwiseSqrt();
for(qint32 i = 0; i < normSize.size(); ++i)
if(normSize(i) != 0)
tri_nn.row(i) /= normSize(i);
MatrixX3f nn = MatrixX3f::Zero(rr.rows(), 3);
for(qint32 p = 0; p < tris.rows(); ++p)
{
Vector3i verts = tris.row(p);
for(qint32 j = 0; j < verts.size(); ++j)
nn.row(verts(j)) = tri_nn.row(p);
}
tmp = nn.cwiseProduct(nn);
normSize = tmp.rowwise().sum();
normSize = normSize.cwiseSqrt();
for(qint32 i = 0; i < normSize.size(); ++i)
if(normSize(i) != 0)
nn.row(i) /= normSize(i);
return nn;
}
void LabelView::initializeGL(QGLPainter *painter)
{
// in the constructor construct a builder on the stack
QGLBuilder builder;
float fac = 10.0f;
builder << QGL::Faceted;
m_pSceneNodeBrain = builder.currentNode();
builder.pushNode();
// Collor palette
qint32 index;
QSharedPointer<QGLMaterialCollection> palette = builder.sceneNode()->palette(); // register color palette within the root node
//
// Build each hemisphere in its separate node
//
for(qint32 h = 0; h < 2; ++h)
{
builder.newNode();//create new hemisphere node
{
MatrixX3i tris;
MatrixX3f rr = m_surfSet[h].rr();
builder.pushNode();
//
// Create each ROI in its own node
//
for(qint32 k = 0; k < m_qListLabels.size(); ++k)
{
//check if label hemi fits current hemi
if(m_qListLabels[k].hemi != h)
continue;
//Ggenerate label tri information
tris = m_qListLabels[k].selectTris(m_surfSet[h]);
// add new ROI node when current ROI node is not empty
if(builder.currentNode()->count() > 0)
builder.newNode();
QGeometryData t_GeometryDataTri;
MatrixXf t_TriCoords(3,3*tris.rows());
for(qint32 i = 0; i < tris.rows(); ++i)
{
t_TriCoords.col(i*3) = rr.row( tris(i,0) ).transpose();
t_TriCoords.col(i*3+1) = rr.row( tris(i,1) ).transpose();
t_TriCoords.col(i*3+2) = rr.row( tris(i,2) ).transpose();
}
t_TriCoords *= fac;
t_GeometryDataTri.appendVertexArray(QArray<QVector3D>::fromRawData( reinterpret_cast<const QVector3D*>(t_TriCoords.data()), t_TriCoords.cols() ));
//
// If triangles are available.
//
if (t_GeometryDataTri.count() > 0)
{
//
// Add triangles to current node
//
builder.addTriangles(t_GeometryDataTri);
//
// Colorize ROI
//
QGLMaterial *t_pMaterialROI = new QGLMaterial();
int r, g, b;
r = m_qListRGBAs[k][0];
g = m_qListRGBAs[k][1];
b = m_qListRGBAs[k][2];
t_pMaterialROI->setColor(QColor(r,g,b,200));
// t_pMaterialROI->setEmittedLight(QColor(100,100,100,255));
// t_pMaterialROI->setSpecularColor(QColor(10,10,10,20));
index = palette->addMaterial(t_pMaterialROI);
builder.currentNode()->setMaterialIndex(index);
}
}
}
// Go one level up
builder.popNode();
}
// Go one level up
builder.popNode();
// Optimze current scene for display and calculate lightning normals
m_pSceneNode = builder.finalizedSceneNode();
m_pSceneNode->setParent(this);
//
// Create light models
//
m_pLightModel = new QGLLightModel(this);
m_pLightModel->setAmbientSceneColor(Qt::white);
m_pLightModel->setViewerPosition(QGLLightModel::LocalViewer);
m_pLightModel = new QGLLightModel(this);
m_pLightParametersScene = new QGLLightParameters(this);
m_pLightParametersScene->setPosition(QVector3D(0.0f, 0.0f, 3.0f));
painter->setMainLight(m_pLightParametersScene);
simCount = 0;
//
// Set stereo type
//
if (m_bStereo) {
this->setStereoType(QGLView::RedCyanAnaglyph);
camera()->setEyeSeparation(0.4f);
m_pCameraFrontal->setEyeSeparation(0.1f);
}
}
CustomMesh::CustomMesh(const MatrixX3f &tMatVert, const MatrixX3f tMatNorm, const MatrixX3i &tMatTris, const Vector3f &tVecOffset)
: Qt3DRender::QGeometryRenderer()
, m_iNumVert(tMatVert.rows())
{
Qt3DRender::QGeometry* customGeometry = new Qt3DRender::QGeometry(this);
m_pVertexDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, customGeometry);//QSharedPointer<Qt3DRender::QBuffer>(new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, customGeometry));
m_pNormalDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, customGeometry);//QSharedPointer<Qt3DRender::QBuffer>(new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, customGeometry));
m_pColorDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, customGeometry);//QSharedPointer<Qt3DRender::QBuffer>(new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, customGeometry));
m_pIndexDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::IndexBuffer, customGeometry);//QSharedPointer<Qt3DRender::QBuffer>(new Qt3DRender::QBuffer(Qt3DRender::QBuffer::IndexBuffer, customGeometry));
//Fill vertexBuffer with data which hold the vertices, normals and colors
QByteArray vertexBufferData;
vertexBufferData.resize(tMatVert.rows() * 3 * (int)sizeof(float));
float *rawVertexArray = reinterpret_cast<float *>(vertexBufferData.data());
QByteArray normalBufferData;
normalBufferData.resize(tMatVert.rows() * 3 * (int)sizeof(float));
float *rawNormalArray = reinterpret_cast<float *>(normalBufferData.data());
QByteArray colorBufferData;
colorBufferData.resize(tMatVert.rows() * 3 * (int)sizeof(float));
float *rawColorArray = reinterpret_cast<float *>(colorBufferData.data());
int idxVert = 0;
int idxNorm = 0;
int idxColor = 0;
for(int i = 0; i<tMatVert.rows(); i++) {
//Vertex
rawVertexArray[idxVert++] = tMatVert(i,0) + tVecOffset(0);
rawVertexArray[idxVert++] = tMatVert(i,1) + tVecOffset(1);
rawVertexArray[idxVert++] = tMatVert(i,2) + tVecOffset(2);
//Normal
rawNormalArray[idxNorm++] = tMatNorm(i,0);
rawNormalArray[idxNorm++] = tMatNorm(i,1);
rawNormalArray[idxNorm++] = tMatNorm(i,2);
//Color (this is the default color and will be used until the updateVertColor function was called)
rawColorArray[idxColor++] = 0.5f;
rawColorArray[idxColor++] = 0.2f;
rawColorArray[idxColor++] = 0.2f;
}
//Fill indexBufferData with data which holds the triangulation information (faces/tris)
QByteArray indexBufferData;
indexBufferData.resize(tMatTris.rows() * 3 * (int)sizeof(uint));
uint *rawIndexArray = reinterpret_cast<uint *>(indexBufferData.data());
int idxTris = 0;
for(int i = 0; i<tMatTris.rows(); i++) {
//Faces/Tris
rawIndexArray[idxTris++] = tMatTris(i,0);
rawIndexArray[idxTris++] = tMatTris(i,1);
rawIndexArray[idxTris++] = tMatTris(i,2);
}
//Set data to buffers
m_pVertexDataBuffer->setData(vertexBufferData);
m_pNormalDataBuffer->setData(normalBufferData);
m_pColorDataBuffer->setData(colorBufferData);
m_pIndexDataBuffer->setData(indexBufferData);
// Attributes
Qt3DRender::QAttribute *positionAttribute = new Qt3DRender::QAttribute();
positionAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
positionAttribute->setBuffer(m_pVertexDataBuffer);
positionAttribute->setDataType(Qt3DRender::QAttribute::Float);
positionAttribute->setDataSize(3);
positionAttribute->setByteOffset(0);
positionAttribute->setByteStride(3 * sizeof(float));
positionAttribute->setCount(tMatVert.rows());
positionAttribute->setName(Qt3DRender::QAttribute::defaultPositionAttributeName());
Qt3DRender::QAttribute *normalAttribute = new Qt3DRender::QAttribute();
normalAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
normalAttribute->setBuffer(m_pNormalDataBuffer);
normalAttribute->setDataType(Qt3DRender::QAttribute::Float);
normalAttribute->setDataSize(3);
normalAttribute->setByteOffset(0);
normalAttribute->setByteStride(3 * sizeof(float));
normalAttribute->setCount(tMatVert.rows());
normalAttribute->setName(Qt3DRender::QAttribute::defaultNormalAttributeName());
Qt3DRender::QAttribute *colorAttribute = new Qt3DRender::QAttribute();
colorAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
colorAttribute->setBuffer(m_pColorDataBuffer);
colorAttribute->setDataType(Qt3DRender::QAttribute::Float);
colorAttribute->setDataSize(3);
colorAttribute->setByteOffset(0);
colorAttribute->setByteStride(3 * sizeof(float));
colorAttribute->setCount(tMatVert.rows());
colorAttribute->setName(Qt3DRender::QAttribute::defaultColorAttributeName());
Qt3DRender::QAttribute *indexAttribute = new Qt3DRender::QAttribute();
indexAttribute->setAttributeType(Qt3DRender::QAttribute::IndexAttribute);
indexAttribute->setBuffer(m_pIndexDataBuffer);
indexAttribute->setDataType(Qt3DRender::QAttribute::UnsignedInt);
indexAttribute->setDataSize(1);
indexAttribute->setByteOffset(0);
indexAttribute->setByteStride(0);
indexAttribute->setCount(tMatTris.rows());
customGeometry->addAttribute(positionAttribute);
customGeometry->addAttribute(normalAttribute);
customGeometry->addAttribute(colorAttribute);
customGeometry->addAttribute(indexAttribute);
this->setInstanceCount(1);
this->setBaseVertex(0);
this->setBaseInstance(0);
this->setPrimitiveType(Qt3DRender::QGeometryRenderer::Triangles);
this->setGeometry(customGeometry);
this->setPrimitiveCount(tMatTris.rows()*3);
}