void MeshData::generateTangents() {
int pos_attr, uv_attr, len, n;
float r, *pos, *uv, *tan, *bitan;
vec3 pos_d1, pos_d2, uv_d1, uv_d2;
pos_attr = getAttributeIndex("position");
uv_attr = getAttributeIndex("texcoord");
if (pos_attr < 0) {
#ifndef PLG_RELEASE
dprintf(2, "error: can't generateTangents() without position attribute\n");
#endif
return;
}
if (uv_attr < 0) {
#ifndef PLG_RELEASE
dprintf(2, "error: can't generateTangents() without texcoord attribute\n");
#endif
return;
}
pos = getVertex(pos_attr, 0);
uv = getVertex(uv_attr, 0);
len = getVertexCount() / 3;
tan = (float *) malloc(len * 9 * sizeof(float));
bitan = (float *) malloc(len * 9 * sizeof(float));
for (n = 0; n < len; n ++) {
vec3_sub(&pos_d1, (vec3 *) (pos + n * 9 + 3), (vec3 *) (pos + n * 9));
vec3_sub(&pos_d2, (vec3 *) (pos + n * 9 + 6), (vec3 *) (pos + n * 9));
uv_d1.d[0] = uv[n * 6 + 2] - uv[n * 6 + 0];
uv_d1.d[1] = uv[n * 6 + 3] - uv[n * 6 + 1];
uv_d2.d[0] = uv[n * 6 + 4] - uv[n * 6 + 0];
uv_d2.d[1] = uv[n * 6 + 5] - uv[n * 6 + 1];
r = 1.0f / (uv_d1.d[0] * uv_d2.d[1] - uv_d1.d[1] * uv_d2.d[0]);
tan[n * 9 + 0] = (pos_d1.d[0] * uv_d2.d[1] - pos_d2.d[0] * uv_d1.d[1]) * r;
tan[n * 9 + 1] = (pos_d1.d[1] * uv_d2.d[1] - pos_d2.d[1] * uv_d1.d[1]) * r;
tan[n * 9 + 2] = (pos_d1.d[2] * uv_d2.d[1] - pos_d2.d[2] * uv_d1.d[1]) * r;
tan[n * 9 + 6] = tan[n * 9 + 3] = tan[n * 9 + 0];
tan[n * 9 + 7] = tan[n * 9 + 4] = tan[n * 9 + 1];
tan[n * 9 + 8] = tan[n * 9 + 5] = tan[n * 9 + 2];
bitan[n * 9 + 0] = (pos_d2.d[0] * uv_d1.d[0] - pos_d1.d[0] * uv_d2.d[0]) * r;
bitan[n * 9 + 1] = (pos_d2.d[1] * uv_d1.d[0] - pos_d1.d[1] * uv_d2.d[0]) * r;
bitan[n * 9 + 2] = (pos_d2.d[2] * uv_d1.d[0] - pos_d1.d[2] * uv_d2.d[0]) * r;
bitan[n * 9 + 6] = bitan[n * 9 + 3] = bitan[n * 9 + 0];
bitan[n * 9 + 7] = bitan[n * 9 + 4] = bitan[n * 9 + 1];
bitan[n * 9 + 8] = bitan[n * 9 + 5] = bitan[n * 9 + 2];
}
addTangents(tan, len * 9);
addBitangents(bitan, len * 9);
}
inline CGoGNCodeType AttributeContainer::getTypeCode(const std::string& attribName) const
{
unsigned int index = getAttributeIndex(attribName) ;
if(index == UNKNOWN)
return CGoGNUNKNOWNTYPE ;
return m_tableAttribs[index]->getTypeCode();
}
void AttributeContainer::addAttribute(const std::string& attribName, const std::string& nametype, unsigned int index)
{
// first check if attribute already exist
if (attribName != "")
{
unsigned int i = getAttributeIndex(attribName) ;
if (i != UNKNOWN)
return ;
}
// create the new attribute
AttributeMultiVector<T>* amv = new AttributeMultiVector<T>(attribName, nametype);
m_tableAttribs[index] = amv;
amv->setOrbit(m_orbit) ;
amv->setIndex(index) ;
// generate a name for the attribute if no one was given
if (attribName == "")
{
std::stringstream ss;
ss << "unknown" << m_nbUnknown++;
amv->setName(ss.str());
}
// update the memory cost of a line
m_lineCost += sizeof(T) ;
// resize the new attribute so that it has the same size than others
amv->setNbBlocks(uint32(m_holesBlocks.size())) ;
m_nbAttributes++;
}
inline AttributeMultiVectorGen* AttributeContainer::getVirtualDataVector(const std::string& attribName)
{
unsigned int index = getAttributeIndex(attribName) ;
if(index == UNKNOWN)
return NULL ;
else
return m_tableAttribs[index];
}
const char* XmlElement::getAttributeValue(const char* name) {
int index = getAttributeIndex(name);
if (index < 0) {
return "";
}
return getAttributeValue(index).getBase();
}
const ModelAttribute *ModelClassifier::getAttribute(const std::string &name) const
{
ModelAttribute *attr = nullptr;
size_t index = getAttributeIndex(name);
if(index != NoIndex)
{
attr = mAttributes[index].get();
}
return attr;
}
AttributeMultiVector<T>* AttributeContainer::getDataVector(const std::string& attribName)
{
unsigned int index = getAttributeIndex(attribName) ;
if(index == UNKNOWN)
return NULL ;
AttributeMultiVector<T>* atm = dynamic_cast<AttributeMultiVector<T>*>(m_tableAttribs[index]);
assert((atm != NULL) || !"getDataVector: wrong type");
return atm;
}
AttributeMultiVector<T>* AttributeContainer::addAttribute(const std::string& attribName)
{
// first check if attribute already exist
unsigned int index ;
if (attribName != "")
{
index = getAttributeIndex(attribName) ;
if (index != UNKNOWN)
{
std::cout << "attribute " << attribName << " already found.." << std::endl ;
return NULL ;
}
}
// create the new attribute
std::string typeName = nameOfType(T()) ;
AttributeMultiVector<T>* amv = new AttributeMultiVector<T>(attribName, typeName) ;
if(!m_freeIndices.empty())
{
index = m_freeIndices.back() ;
m_freeIndices.pop_back() ;
m_tableAttribs[index] = amv ;
}
else
{
index = uint32(m_tableAttribs.size()) ;
m_tableAttribs.push_back(amv) ;
}
amv->setOrbit(m_orbit) ;
amv->setIndex(index) ;
// generate a name for the attribute if no one was given
if (attribName == "")
{
std::stringstream ss ;
ss << "unknown" << m_nbUnknown++ ;
amv->setName(ss.str()) ;
}
// update the memory cost of a line
m_lineCost += sizeof(T) ;
// resize the new attribute so that it has the same size than others
amv->setNbBlocks(uint32(m_holesBlocks.size())) ;
m_nbAttributes++ ;
return amv ;
}
void CPUSideTriangleMesh::generatePhongNormals()
{
assert( haveFaceNormals() && haveSmoothingGroups() && "Mesh should have smoothing groups - use generateSmoothingGroups");
// vertex normals
math::vector_of_vector3f normals(attributeArrays[0].count);
// vertex normals indices
std::vector<unsigned> indices(indicesArrays[0].indices.get(), indicesArrays[0].indices.get() + indicesArrays[0].count);
// vertex smoothing groups
std::vector<int> vertexSMGroup(attributeArrays[0].count, -1);
// average normals against faces sharing same smoothing group
for (size_t iFace = 0; iFace < faceNormals.size(); ++iFace)
{
for (size_t iVertInd = iFace * 3; iVertInd < iFace * 3 + 3; ++iVertInd)
{
unsigned iVert = indices[iVertInd];
if (vertexSMGroup[iVert] == -1)
{
vertexSMGroup[iVert] = get_first_nonzero_bit(smoothingGroups[iFace]);
normals[iVert] = faceNormals[iFace];
}
else if ( (smoothingGroups[iFace] != 0) && (smoothingGroups[iFace] & (1 << (vertexSMGroup[iVert] - 1))) ) {
normals[iVert] += faceNormals[iFace];
}
else
{
indices[iVertInd] = normals.size();
normals.push_back(faceNormals[iFace]);
vertexSMGroup.push_back( get_first_nonzero_bit(smoothingGroups[iFace]) );
}
}
}
// normalize all
for (size_t i = 0; i<normals.size(); ++i) {
normals[i] = math::normalize(normals[i]);
}
// find attribute slot for normals
int normalAttrIndex = getAttributeIndex("normal");
if (normalAttrIndex == -1) {
normalAttrIndex = getFreeAttributeIndex();
}
assert(normalAttrIndex != -1 && "No free slot for normals");
// setup normals
setAttributes("normal", normalAttrIndex, 3, normals.size(), sgl::FLOAT, &normals[0]);
setIndices(normalAttrIndex, indices.size(), &indices[0]);
}
void Type::addAttribute(TypeAttribute attrib)
{
//Raises an error if the attribute has an empty name or null type
if(attrib.getName().isEmpty() || attrib.getType()==PgSQLType::null)
throw Exception(ERR_INS_INV_TYPE_ATTRIB,__PRETTY_FUNCTION__,__FILE__,__LINE__);
//Raises an error if the passed attribute has the same type as the defining type (this)
else if(PgSQLType::getUserTypeIndex(this->getName(true), this) == !attrib.getType())
throw Exception(Exception::getErrorMessage(ERR_USER_TYPE_SELF_REFERENCE).arg(this->getName(true)),
ERR_USER_TYPE_SELF_REFERENCE,__PRETTY_FUNCTION__,__FILE__,__LINE__);
//Raises an error when the attribute already exists
else if(getAttributeIndex(attrib.getName()) >= 0)
throw Exception(ERR_INS_DUPLIC_ITEMS,__PRETTY_FUNCTION__,__FILE__,__LINE__);
type_attribs.push_back(attrib);
setCodeInvalidated(true);
}
void MeshData::getBoundingBox(float dst[6]) {
uint attr, n, flags[6] = {0};
float* cur;
attr = getAttributeIndex("position");
if (attr < 0) {
dprintf(2, "error: can't getBoundingBox() without position attribute\n");
return;
}
for (n = 0; n < getVertexCount(); n++) {
cur = getVertex(attr, n);
if (!flags[0] || cur[0] < dst[0]) {
flags[0] = 1;
dst[0] = cur[0];
}
if (!flags[1] || cur[0] > dst[1]) {
flags[1] = 1;
dst[1] = cur[0];
}
if (!flags[2] || cur[1] < dst[2]) {
flags[2] = 1;
dst[2] = cur[1];
}
if (!flags[3] || cur[1] > dst[3]) {
flags[3] = 1;
dst[3] = cur[1];
}
if (!flags[4] || cur[2] < dst[4]) {
flags[4] = 1;
dst[4] = cur[2];
}
if (!flags[5] || cur[2] > dst[5]) {
flags[5] = 1;
dst[5] = cur[2];
}
}
}
void MeshData::generateNormals() {
int attr, len;
vec3 nf, e1, e2, *p0, *p1, *p2;
float *cur, *dst, *normals;
attr = getAttributeIndex("position");
if (attr < 0) {
#ifndef PLG_RELEASE
dprintf(2, "error: can't generateNormals() without position attribute\n");
#endif
return;
}
len = getVertexCount() * 3;
normals = (float *) malloc(len * sizeof(float));
dst = normals;
cur = getVertex(attr, 0);
while (dst < normals + len) {
p0 = (vec3 *) &cur[0],
p1 = (vec3 *) &cur[3];
p2 = (vec3 *) &cur[6];
vec3_sub(&e1, p1, p2);
vec3_sub(&e2, p2, p0);
vec3_normalize(&e1);
vec3_normalize(&e2);
vec3_cross(&nf, &e1, &e2);
memcpy(dst + 0, &nf, sizeof(vec3));
memcpy(dst + 3, &nf, sizeof(vec3));
memcpy(dst + 6, &nf, sizeof(vec3));
cur += 9;
dst += 9;
}
addNormals(normals, len);
}
bool AttributeContainer::removeAttribute(const std::string& attribName)
{
unsigned int index = getAttributeIndex(attribName) ;
if (index == UNKNOWN)
{
std::cerr << "removeAttribute by name: attribute not found (" << attribName << ")"<< std::endl ;
return false ;
}
// delete the attribute
delete m_tableAttribs[index] ;
m_tableAttribs[index] = NULL ;
if (index == m_tableAttribs.size() - 1)
m_tableAttribs.pop_back() ;
else
m_freeIndices.push_back(index) ;
--m_nbAttributes ;
m_lineCost -= sizeof(T);
return true ;
}
//-----------------------------------------------------------------------
bool GLSLESProgramCommon::isAttributeValid(VertexElementSemantic semantic, uint index)
{
return getAttributeIndex(semantic, index) != NOT_FOUND_CUSTOM_ATTRIBUTES_INDEX;
}
//-----------------------------------------------------------------------
bool GLSLLinkProgram::isAttributeValid(VertexElementSemantic semantic, uint index)
{
return mValidAttributes.find(getAttributeIndex(semantic, index)) != mValidAttributes.end();
}
int XmlElement::hasAttribute(const char* name) {
return getAttributeIndex(name) + 1;
}
