KRMaterial::KRMaterial(KRContext &context, const char *szName) : KRResource(context, szName) {
m_name = szName;
m_pAmbientMap = NULL;
m_pDiffuseMap = NULL;
m_pSpecularMap = NULL;
m_pNormalMap = NULL;
m_pReflectionMap = NULL;
m_pReflectionCube = NULL;
m_ambientColor = KRVector3::Zero();
m_diffuseColor = KRVector3::One();
m_specularColor = KRVector3::One();
m_reflectionColor = KRVector3::Zero();
m_tr = (GLfloat)1.0f;
m_ns = (GLfloat)0.0f;
m_ambientMap = "";
m_diffuseMap = "";
m_specularMap = "";
m_normalMap = "";
m_reflectionMap = "";
m_reflectionCube = "";
m_ambientMapOffset = KRVector2(0.0f, 0.0f);
m_specularMapOffset = KRVector2(0.0f, 0.0f);
m_diffuseMapOffset = KRVector2(0.0f, 0.0f);
m_ambientMapScale = KRVector2(1.0f, 1.0f);
m_specularMapScale = KRVector2(1.0f, 1.0f);
m_diffuseMapScale = KRVector2(1.0f, 1.0f);
m_reflectionMapOffset = KRVector2(0.0f, 0.0f);
m_reflectionMapScale = KRVector2(1.0f, 1.0f);
m_alpha_mode = KRMATERIAL_ALPHA_MODE_OPAQUE;
}
KRVector2 KRVector3::yy() const
{
return KRVector2(y,y);
}
KRVector2 KRVector3::yx() const
{
return KRVector2(y,x);
}
KRVector2 KRVector3::xz() const
{
return KRVector2(x,z);
}
KRVector2 KRVector3::xy() const
{
return KRVector2(x,y);
}
KRVector2 KRVector3::xx() const
{
return KRVector2(x,x);
}
KRVector2 KRVector2::Max() {
return KRVector2(std::numeric_limits<float>::max());
}
KRVector2 KRVector2::operator *(const float v) const {
return KRVector2(x * v, y * v);
}
KRVector2 KRVector2::operator /(const float v) const {
float inv_v = 1.0f / v;
return KRVector2(x * inv_v, y * inv_v);
}
KRVector2 KRVector2::operator -(const KRVector2& b) const {
return KRVector2(x - b.x, y - b.y);
}
KRVector2 KRVector2::operator -() const {
return KRVector2(-x, -y);
}
KRVector2 KRVector2::operator +(const KRVector2& b) const {
return KRVector2(x + b.x, y + b.y);
}
KRVector2 KRVector2::One() {
return KRVector2(1.0f);
}
KRVector2 KRVector2::Zero() {
return KRVector2(0.0f);
}
KRVector2 KRVector3::yz() const
{
return KRVector2(y,z);
}
KRVector2 KRVector3::zy() const
{
return KRVector2(z,y);
}
KRVector2 KRVector3::zx() const
{
return KRVector2(z,x);
}
KRVector2 KRVector3::zz() const
{
return KRVector2(z,z);
}
std::vector<KRResource *> KRResource::LoadObj(KRContext &context, const std::string& path)
{
std::vector<KRResource *> resources;
KRMesh *new_mesh = new KRMesh(context, KRResource::GetFileBase(path));
resources.push_back(new_mesh);
KRMesh::mesh_info mi;
std::vector<std::string> material_names_t;
KRDataBlock data;
char szSymbol[500][256];
int *pFaces = NULL;
vector<KRMesh::pack_material *> m_materials;
if(data.load(path)) {
// -----=====----- Get counts -----=====-----
int cVertexData = 0;
int cFaces = 1;
int cMaterialFaceStart = 1;
char *pScan = (char *)data.getStart();
char *pEnd = (char *)data.getEnd();
while(pScan < pEnd) {
// Scan through whitespace
while(pScan < pEnd && (*pScan == ' ' || *pScan == '\t' || *pScan == '\r' || *pScan == '\n')) {
pScan++;
}
if(*pScan == '#') {
// Line is a comment line
// Scan to the end of the line
while(pScan < pEnd && *pScan != '\r' && *pScan != '\n') {
pScan++;
}
} else {
int cSymbols = 0;
while(pScan < pEnd && *pScan != '\n' && *pScan != '\r') {
char *pDest = szSymbol[cSymbols++];
while(pScan < pEnd && *pScan != ' ' && *pScan != '\n' && *pScan != '\r') {
*pDest++ = *pScan++;
}
*pDest = '\0';
// Scan through whitespace, but don't advance to next line
while(pScan < pEnd && (*pScan == ' ' || *pScan == '\t')) {
pScan++;
}
}
if(strcmp(szSymbol[0], "v") == 0) {
// Vertex (v)
} else if(strcmp(szSymbol[0], "vt") == 0) {
// Vertex Texture UV Coordinate (vt)
} else if(strcmp(szSymbol[0], "vn") == 0) {
// Vertex Normal (vn)
} else if(strcmp(szSymbol[0], "f") == 0) {
// Face (f)
int cFaceVertexes = (cSymbols - 3) * 3; // 3 vertexes per triangle. Triangles have 4 symbols. Quads have 5 symbols and generate two triangles.
cVertexData += cFaceVertexes;
cFaces += cFaceVertexes * 3 + 1; // Allocate space for count of vertices, Vertex Index, Texture Coordinate Index, and Normal Index
} else if(strcmp(szSymbol[0], "usemtl") == 0) {
// Use Material (usemtl)
if(cMaterialFaceStart - cFaces > 0) {
cFaces++;
}
material_names_t.push_back(std::string(szSymbol[1]));
}
}
}
// -----=====----- Populate vertexes and faces -----=====-----
int *pFaces = (int *)malloc(sizeof(int *) * (cFaces + 1));
assert(pFaces != NULL);
std::vector<KRVector3> indexed_vertices;
std::vector<KRVector2> indexed_uva;
std::vector<KRVector3> indexed_normals;
int *pFace = pFaces;
int *pMaterialFaces = pFace++;
*pMaterialFaces = 0;
// --------
pScan = (char *)data.getStart();
while(pScan < pEnd) {
// Scan through whitespace
while(pScan < pEnd && (*pScan == ' ' || *pScan == '\t' || *pScan == '\r' || *pScan == '\n')) {
pScan++;
}
if(*pScan == '#') {
// Line is a comment line
// Scan to the end of the line
while(pScan < pEnd && *pScan != '\r' && *pScan != '\n') {
pScan++;
}
} else {
int cSymbols = 0;
while(pScan < pEnd && *pScan != '\n' && *pScan != '\r') {
char *pDest = szSymbol[cSymbols++];
while(pScan < pEnd && *pScan != ' ' && *pScan != '\n' && *pScan != '\r') {
*pDest++ = *pScan++;
}
*pDest = '\0';
// Scan through whitespace, but don't advance to next line
while(pScan < pEnd && (*pScan == ' ' || *pScan == '\t')) {
pScan++;
}
}
if(strcmp(szSymbol[0], "v") == 0) {
// Vertex (v)
float x, y, z;
char *pChar = szSymbol[1];
x = strtof(pChar, &pChar);
pChar = szSymbol[2];
y = strtof(pChar, &pChar);
pChar = szSymbol[3];
z = strtof(pChar, &pChar);
indexed_vertices.push_back(KRVector3(x,y,z));
} else if(strcmp(szSymbol[0], "vt") == 0) {
// Vertex Texture UV Coordinate (vt)
char *pChar = szSymbol[1];
float u,v;
u = strtof(pChar, &pChar);
pChar = szSymbol[2];
v = strtof(pChar, &pChar);
indexed_uva.push_back(KRVector2(u,v));
} else if(strcmp(szSymbol[0], "vn") == 0) {
// Vertex Normal (vn)
float x,y,z;
char *pChar = szSymbol[1];
x = strtof(pChar, &pChar);
pChar = szSymbol[2];
y = strtof(pChar, &pChar);
pChar = szSymbol[3];
z = strtof(pChar, &pChar);
indexed_normals.push_back(KRVector3(x,y,z));
} else if(strcmp(szSymbol[0], "f") == 0) {
// Face (f)
int cFaceVertices = cSymbols - 1;
*pFace++ = cFaceVertices;
for(int iSymbol=1; iSymbol < cSymbols; iSymbol++) {
char *pChar = szSymbol[iSymbol];
if(*pChar == '.' || (*pChar >= '0' && *pChar <= '9')) {
*pFace++ = strtol(pChar, &pChar, 10) - 1; // Vertex Index
if(*pChar == '/') {
pChar++;
if(*pChar == '/') {
*pFace++ = -1;
} else {
*pFace++ = strtol(pChar, &pChar, 10) - 1; // Texture Coordinate Index
}
} else {
*pFace++ = -1;
}
if(*pChar == '/') {
pChar++;
if(*pChar == '/') {
*pFace++ = -1;
} else {
*pFace++ = strtol(pChar, &pChar, 10) - 1; // Normal Index
}
} else {
*pFace++ = -1;
}
while(*pChar == '/') {
pChar++;
strtol(pChar, &pChar, 10);
}
}
}
} else if(strcmp(szSymbol[0], "usemtl") == 0) {
// Use Material (usemtl)
if(pFace - pMaterialFaces > 1) {
*pMaterialFaces = pFace - pMaterialFaces - 1;
pMaterialFaces = pFace++;
}
}
}
}
*pMaterialFaces = pFace - pMaterialFaces - 1;
*pFace++ = 0;
int iVertex = 0;
std::vector<std::string>::iterator material_itr = material_names_t.begin();
KRMesh::pack_material *pMaterial = new KRMesh::pack_material();
pMaterial->start_vertex = iVertex;
pMaterial->vertex_count = 0;
memset(pMaterial->szName, 256, 0);
if(material_itr < material_names_t.end()) {
strncpy(pMaterial->szName, (*material_itr++).c_str(), 256);
}
m_materials.push_back(pMaterial);
pFace = pFaces;
while(*pFace != 0 && iVertex < cVertexData) {
pMaterial->start_vertex = iVertex;
int *pMaterialEndFace = pFace + *pFace++;
while(pFace < pMaterialEndFace && iVertex < cVertexData) {
int cFaceVertexes = *pFace;
KRVector3 firstFaceVertex;
KRVector3 prevFaceVertex;
KRVector3 firstFaceNormal;
KRVector3 prevFaceNormal;
KRVector2 firstFaceUva;
KRVector2 prevFaceUva;
for(int iFaceVertex=0; iFaceVertex < cFaceVertexes; iFaceVertex++) {
if(iFaceVertex > 2) {
// There have already been 3 vertices. Now we need to split the quad into a second triangle composed of the 1st, 3rd, and 4th vertices
iVertex+=2;
mi.vertices.push_back(firstFaceVertex);
mi.uva.push_back(firstFaceUva);
mi.normals.push_back(firstFaceNormal);
mi.vertices.push_back(prevFaceVertex);
mi.uva.push_back(prevFaceUva);
mi.normals.push_back(prevFaceNormal);
}
KRVector3 vertex = indexed_vertices[pFace[iFaceVertex*3+1]];
KRVector2 new_uva;
if(pFace[iFaceVertex*3+2] >= 0) {
new_uva = indexed_uva[pFace[iFaceVertex*3+2]];
}
KRVector3 normal;
if(pFace[iFaceVertex*3+3] >= 0){
KRVector3 normal = indexed_normals[pFace[iFaceVertex*3+3]];
}
mi.vertices.push_back(vertex);
mi.uva.push_back(new_uva);
mi.normals.push_back(normal);
if(iFaceVertex==0) {
firstFaceVertex = vertex;
firstFaceUva = new_uva;
firstFaceNormal = normal;
}
prevFaceVertex = vertex;
prevFaceUva = new_uva;
prevFaceNormal = normal;
iVertex++;
}
pFace += cFaceVertexes * 3 + 1;
}
pMaterial->vertex_count = iVertex - pMaterial->start_vertex;
if(*pFace != 0) {
pMaterial = new KRMesh::pack_material();
pMaterial->start_vertex = iVertex;
pMaterial->vertex_count = 0;
memset(pMaterial->szName, 256, 0);
if(material_itr < material_names_t.end()) {
strncpy(pMaterial->szName, (*material_itr++).c_str(), 256);
}
m_materials.push_back(pMaterial);
}
}
for(int iMaterial=0; iMaterial < m_materials.size(); iMaterial++) {
KRMesh::pack_material *pNewMaterial = m_materials[iMaterial];
if(pNewMaterial->vertex_count > 0) {
mi.material_names.push_back(std::string(pNewMaterial->szName));
mi.submesh_starts.push_back(pNewMaterial->start_vertex);
mi.submesh_lengths.push_back(pNewMaterial->vertex_count);
}
delete pNewMaterial;
}
// TODO: Bones not yet supported for OBJ
// std::vector<std::string> bone_names;
// std::vector<KRMat4> bone_bind_poses;
// std::vector<std::vector<int> > bone_indexes;
// std::vector<std::vector<float> > bone_weights;
//
// std::vector<__uint16_t> vertex_indexes;
// std::vector<std::pair<int, int> > vertex_index_bases;
mi.format = KRMesh::KRENGINE_MODEL_FORMAT_TRIANGLES;
new_mesh->LoadData(mi, true, false);
}
if(pFaces) {
free(pFaces);
}
return resources;
}
KRVector2 KRVector2::Normalize(const KRVector2 &v) {
float inv_magnitude = 1.0f / sqrtf(v.x * v.x + v.y * v.y);
return KRVector2(v.x * inv_magnitude, v.y * inv_magnitude);
}