void readMaterials(ObjFile* file, FILE* f)
{
rewind(f);
char line[MAX_STRING_LENGTH];
char* tline;
// first material is a default material
initMaterial(&file->materials[0]);
file->numMaterials = 1;
while (NULL != fgets(line, MAX_STRING_LENGTH, f))
{
tline = trimBeginning(line);
char name[MAX_STRING_LENGTH];
// read in the material name
if (strstr(tline, "newmtl") == tline)
{
file->numMaterials++;
// initialize the new material
initMaterial(&file->materials[file->numMaterials - 1]);
// copy the name from the tline
if (sscanf(tline, "newmtl %s", name) == 1)
{
strcpy(file->materials[file->numMaterials - 1].name, name);
}
}
// read in ambient
if (strstr(tline, "Ka") == tline)
{
ObjVector3F ambient;
int n = sscanf(
tline,
"Ka %f %f %f",
&ambient.x,
&ambient.y,
&ambient.z
);
if (n == 3)
{
file->materials[file->numMaterials - 1].ambient = ambient;
}
}
// read diffuse
if (strstr(tline, "Kd") == tline)
{
ObjVector3F diffuse;
int n = sscanf(
tline,
"Kd %f %f %f",
&diffuse.x,
&diffuse.y,
&diffuse.z
);
if (n == 3)
{
file->materials[file->numMaterials - 1].diffuse = diffuse;
}
}
// read specular
if (strstr(tline, "Ks") == tline)
{
ObjVector3F specular;
int n = sscanf(
tline,
"Ks %f %f %f",
&specular.x,
&specular.y,
&specular.z
);
if (n == 3)
{
file->materials[file->numMaterials - 1].specular = specular;
}
}
// read shininess
if (strstr(tline, "Ns") == tline)
{
float shininess;
if (sscanf(tline, "Ns %f", &shininess) == 1)
{
file->materials[file->numMaterials - 1].shininess = shininess;
}
}
// read ambient tex
if (strstr(tline, "map_Ka") == tline)
{
char name[MAX_STRING_LENGTH];
if (sscanf(tline, "map_Ka %s", name) == 1)
{
strcpy(
file->materials[file->numMaterials - 1].ambientTex,
name
);
}
}
// read diffuse tex
if (strstr(tline, "map_Kd") == tline)
{
char name[MAX_STRING_LENGTH];
if (sscanf(tline, "map_Kd %s", name) == 1)
{
strcpy(
file->materials[file->numMaterials - 1].diffuseTex,
name
);
}
}
// read specular tex
if (strstr(tline, "map_Ks") == tline)
{
char name[MAX_STRING_LENGTH];
if (sscanf(tline, "map_Ks %s", name) == 1)
{
strcpy(
file->materials[file->numMaterials - 1].specularTex,
name
);
}
}
}
}
std::string& trim(std::string& inputString) {
trimEnd(inputString);
trimBeginning(inputString);
return inputString;
}
