bool slFileObj::Load() {
Reset();
ScenePtr = mScene;
FILE* infile = fopen(mFilename, "r");
FileLineNumber = 0;
if (!infile) {
fprintf(stderr, "LoadObjFile: Unable to open file: %s\n", mFilename);
return false;
}
char inbuffer[1026];
while (true) {
if (!fgets(inbuffer, 1026, infile)) {
fclose(infile);
PrintCmdNotSupportedErrors(stderr);
return true;
}
FileLineNumber++;
char* findStart = Preparse(inbuffer);
if (findStart == 0 || (*findStart) == '#') {
continue; //Ignore if a comment or a blank line
}
bool parseErrorOccurred = false;
char theCommand[17];
int scanCode = sscanf(inbuffer, "%16s", theCommand);
if (scanCode != 1) {
parseErrorOccurred = true;
}
int cmdNum = GetCommandNumber(theCommand);
if (cmdNum == -1) {
AddUnsupportedCmd(theCommand);
continue;
}
char* args = ScanForSecondField(findStart);
bool ok = true;
switch (cmdNum) {
case 0: //'v' command
{
vec4* vertData = Vertices.Add();
ok = ReadVectorR4Hg(args, vertData);
}
break;
case 1: //"vt" command
{
vec2* texData = TextureCoords.Add();
ok = ReadTexCoords(args, texData);
}
break;
case 2: //The 'f' command
{
ok = ProcessFace(args , mDefaultMat);
}
break;
case 3: //'l' command
UnsupportedLines();
break;
default:
parseErrorOccurred = true;
break;
}
if (!ok) {
parseErrorOccurred = true;
}
}
}
bool NffFileLoader::Load( const char* filename, SceneDescription& theScene )
{
Reset();
ScenePtr = &theScene;
FILE* infile = fopen( filename, "r" );
FileLineNumber = 0;
if ( !infile ) {
fprintf(stderr, "LoadNffFile: Unable to open file: %s\n", filename);
return false;
}
const Material* curMaterial = &Material::Default;
// Information for view ("v") command
int viewCmdStatus = false; // True if currently handling a "v" command
VectorR3 viewPos;
VectorR3 lookAtPos;
VectorR3 upVector;
double fovy; // Field of view angle (in radians)
int screenWidth, screenHeight;
double hither;
char inbuffer[1026];
while ( true ) {
if ( !fgets( inbuffer, 1026, infile ) ) {
if ( viewCmdStatus ) {
SetCameraViewInfo( theScene.GetCameraView(),
viewPos, lookAtPos, upVector, fovy,
screenWidth, screenHeight, hither );
}
fclose( infile );
PrintCmdNotSupportedErrors(stderr);
return true;
}
FileLineNumber++;
char *findStart = PreparseNff( inbuffer );
if ( findStart==0 ) {
// Ignore if a comment or a blank line
if ( viewCmdStatus ) {
SetCameraViewInfo( theScene.GetCameraView(),
viewPos, lookAtPos, upVector, fovy,
screenWidth, screenHeight, hither );
viewCmdStatus = false;
}
continue;
}
bool parseErrorOccurred = false;
char theCommand[17];
int scanCode = sscanf( inbuffer, "%16s", theCommand );
if ( scanCode!=1 ) {
parseErrorOccurred = true;
}
int cmdNum = GetCommandNumber( theCommand );
if ( cmdNum==-1 ) {
AddUnsupportedCmd( theCommand );
continue;
}
if ( viewCmdStatus && cmdNum<8 ) {
SetCameraViewInfo( theScene.GetCameraView(),
viewPos, lookAtPos, upVector, fovy,
screenWidth, screenHeight, hither );
viewCmdStatus = false;
}
char* args = ObjFileLoader::ScanForSecondField( findStart );
bool ok = true;
switch ( cmdNum ) {
case 0: // 'v' command
viewCmdStatus = true;
break;
case 1: // 'b' command - background color
{
VectorR3 bgColor;
scanCode = sscanf( args, "%lf %lf %lf", &(bgColor.x), &(bgColor.y), &(bgColor.z) );
if ( scanCode!=3 ) {
ok = false;
break;
}
theScene.SetBackGroundColor( bgColor );
}
break;
case 2: // 'l' command - positional light
{
VectorR3 lightPos, lightColor;
scanCode = sscanf( args, "%lf %lf %lf %lf %lf %lf",
&(lightPos.x), &(lightPos.y), &(lightPos.z),
&(lightColor.x), &(lightColor.y), &(lightColor.z) );
if ( scanCode==3 || scanCode==6 ) {
Light* aLight = new Light();
aLight->SetPosition( lightPos );
if ( scanCode==6 ) {
aLight->SetColor( lightColor );
}
theScene.AddLight( aLight );
}
else {
ok = false;
}
}
break;
case 3: // 'f' command - material properties
{
VectorR3 color; // Material color
double Kd, Ks; // Diffuse and specular components
double shininess;
double transmission; // Transmission coefficient
double indexOfRefraction;
scanCode = sscanf( args, "%lf %lf %lf %lf %lf %lf %lf %lf",
&color.x, &color.y, &color.z, &Kd, &Ks,
&shininess, &transmission, &indexOfRefraction );
if ( scanCode==8 ) {
Material* mat = new Material();
theScene.AddMaterial( mat ); // theScene can take of deleting this material
mat->SetColorAmbientDiffuse( Kd*color );
mat->SetColorSpecular( Ks*color );
mat->SetShininess( shininess );
if ( transmission>0.0 ) {
mat->SetColorTransmissive( transmission, transmission, transmission );
mat->SetIndexOfRefraction( indexOfRefraction );
}
curMaterial = mat;
}
else {
ok = false;
}
}
break;
case 4: // 'c' command - cylinder or cone or truncated cone
{
VectorR3 baseCenter;
VectorR3 topCenter;
double baseRadius;
double topRadius;
scanCode = sscanf( args, "%lf %lf %lf %lf %lf %lf %lf %lf",
&baseCenter.x, &baseCenter.y, &baseCenter.z, &baseRadius,
&topCenter.x, &topCenter.y, &topCenter.z, &topRadius );
if ( scanCode==8 ) {
ProcessConeCylNFF( baseCenter, baseRadius, topCenter, topRadius );
}
else {
ok = false;
}
}
case 5: // 's' command - sphere
{
VectorR3 sphereCenter;
double radius;
scanCode = sscanf( args, "%lf %lf %lf %lf", &sphereCenter.x, &sphereCenter.y, &sphereCenter.z, &radius );
if ( scanCode==4 && radius>0.0 ) {
ViewableSphere* vs = new ViewableSphere( sphereCenter, radius, curMaterial );
theScene.AddViewable( vs );
}
else {
ok = false;
}
}
break;
case 7: // 'pp' command - normals will be ignored
UnsupportedNormals();
// Fall thru to 'p' command.
case 6: // 'p' command
{
int numVerts;
const int maxNumVerts = 256;
scanCode = sscanf( args, "%d", &numVerts );
if (scanCode!=1 || numVerts<3 ) {
ok = false;
}
else if ( numVerts>maxNumVerts ) {
UnsupportedTooManyVerts( maxNumVerts );
}
else {
ProcessFaceNFF( numVerts, curMaterial, infile );
}
}
break;
case 8: // 'from' command
{
scanCode = sscanf( args, "%lf %lf %lf", &(viewPos.x), &(viewPos.y), &(viewPos.z) );
if ( scanCode!=3 || !viewCmdStatus ) {
ok = false;
viewCmdStatus = false;
}
break;
}
case 9: // 'lookat' command
{
scanCode = sscanf( args, "%lf %lf %lf", &(lookAtPos.x), &(lookAtPos.y), &(lookAtPos.z) );
if ( scanCode!=3 || !viewCmdStatus ) {
ok = false;
viewCmdStatus = false;
}
break;
}
case 10: // 'up' command
{
scanCode = sscanf( args, "%lf %lf %lf", &(upVector.x), &(upVector.y), &(upVector.z) );
if ( scanCode!=3 || !viewCmdStatus ) {
ok = false;
viewCmdStatus = false;
}
break;
}
case 11: // 'angle' command
{
scanCode = sscanf( args, "%lf", &fovy );
if ( scanCode!=1 || !viewCmdStatus ) {
ok = false;
viewCmdStatus = false;
}
else {
fovy *= PI/180.0; // Convert to radians
}
break;
}
case 12: // 'hither' command
{
scanCode = sscanf( args, "%lf", &hither );
if ( scanCode!=1 || !viewCmdStatus ) {
ok = false;
viewCmdStatus = false;
}
break;
}
case 13: // 'resolution' command
{
scanCode = sscanf( args, "%d %d", &screenWidth, &screenHeight );
if ( scanCode!=2 || !viewCmdStatus ) {
ok = false;
viewCmdStatus = false;
}
break;
}
default:
parseErrorOccurred = true;
ok = false;
break;
}
if ( !ok ) {
fprintf(stderr, "Parse error in NFF file, line %ld: %40s.\n", FileLineNumber, inbuffer );
parseErrorOccurred = true;
}
}
}