MaxwellHair

CextensionManager* extensionManager = CextensionManager::instance();
CgeometryProceduralExtension* geomProcExtension = extensionManager->createGeometryProceduralExtension( "MaxwellHair" );
//Get the extension container. When using this method of getting the container,
//nearly all parameters have default values, and there is no need to explicitly set them.
MXparamList* hairParams = geomProcExtension->getExtensionData();
CextensionManager* extensionManager = CextensionManager::instance();
CgeometryProceduralExtension* geomProcExtension = extensionManager->createGeometryProceduralExtension( "MaxwellHair" );
//Get the extension container. When using this method of getting the container,
//nearly all parameters have default values, and there is no need to explicitly set them.
MXparamList* hairParams = geomProcExtension->getExtensionData();
 
//Fill the required data, let's create a couple of hairs with three points each
//If the first hair had two points and the third three points, numPointsPerHair would be an 
//array with two elements, i.e., numPointsPerHair[ 0 ] = 2; and numPointsPerHair[ 1 ] = 3;
int numHairs = 2;
int numPointsPerHair = 3;
hairParams->setByteArray( "HAIR_GUIDES_COUNT", ( unsigned char* )&numHairs, sizeof( int ) );
hairParams->setByteArray( "HAIR_GUIDES_POINT_COUNT", ( unsigned char* )&numPointsPerHair, 1*sizeof( int ) );
float *points = new float[ numHairs*numPointsPerHair*3 ];

//First hair guide
points[ 0 ] = 0.0;points[ 1 ] = 0.0;points[ 2 ] = 0.0;
points[ 3 ] = 0.0;points[ 4 ] = 1.0;points[ 5 ] = 0.0;
points[ 6 ] = 0.0;points[ 7 ] = 2.0;points[ 8 ] = 1.0;

//Second hair guide
points[ 9 ] = 1.0;points[ 10 ] = 0.0;points[ 11 ] = 0.0;
points[ 12 ] = 1.0;points[ 13 ] = 1.0;points[ 14 ] = 0.0;
points[ 15 ] = 2.0;points[ 16 ] = 2.0;points[ 17 ] = 0.0;
hairParams->setFloatArray( "HAIR_POINTS", points, numHairs*numPointsPerHair*3 );


//Tip and root radius
double root = 0.1;

hairParams->setDouble( "Root Radius", &root );
double tip = 0.04;

hairParams->setDouble( "Tip Radius", &tip );


//Add the procedural object to the scene
Cmaxwell::Cobject obj = scene->createGeometryProceduralObject( "My two hairs", hairParams );
 
//Let´s add a uv channel...
dword uvIndex; //returned uv channel index. Use this index in the texture map properties to access its uvs
byte isOk = obj.addChannelUVW( uvIndex ); // uvIndex will be set to the actual uv channel number of the object.
//...and set it to a custom UV generator, 0, in this case,lengthwise U
obj.generateCustomUVW( uvIndex, 0 );
 
//Now assign a material and set the first BSDF reflectance0º color a texture driven by uv channel 'uvIndex'
//This uv channel, since it is a one-valued channel, stores its value in the U coordinate....
 

int numHairs = 2;
hairParams->setByteArray( "HAIR_GUIDES_COUNT", ( unsigned char* )&numHairs, sizeof( int ) );

int numHairs = 2;
int numPointsPerHair[ 2 ];
numPointsPerHair[ 0 ] = 2; and numPointsPerHair[ 1 ] = 3;
hairParams->setByteArray( "HAIR_GUIDES_POINT_COUNT", ( unsigned char* )numPointsPerHair, numHairs*sizeof( int ) );

int numHairs = 2;
int numPointsPerHair = 3;
float *points = new float[ numHairs*numPointsPerHair*3 ];
//First hair
points[ 0 ] = 0.0;points[ 1 ] = 0.0;points[ 2 ] = 0.0;
points[ 3 ] = 0.0;points[ 4 ] = 1.0;points[ 5 ] = 0.0;
points[ 6 ] = 0.0;points[ 7 ] = 2.0;points[ 8 ] = 1.0;

//Second hair
points[ 9 ] = 1.0;points[ 10 ] = 0.0;points[ 11 ] = 0.0;
points[ 12 ] = 1.0;points[ 13 ] = 1.0;points[ 14 ] = 0.0;
points[ 15 ] = 2.0;points[ 16 ] = 2.0;points[ 17 ] = 0.0;
hairParams->setFloatArray( "HAIR_POINTS", points, numHairs*numPointsPerHair*3 );

//Tip and root radius
double root = 0.1;

hairParams->setDouble( "Root Radius", &root );

double tip = 0.04;
hairParams->setDouble( "Tip Radius", &tip );

byte flag = 1;
extParam->setByteArray( "HAIR_FLAG_ROOT_UVS, &flag, 1 );

int numHairs = 3;
float uv[ 2*3 ];
uv[0] = 0.0; uv[1] = 0.0; 
uv[2] = 0.3; uv[3] = 0.2; 
uv[4] = 0.1; uv[5] = 0.99; 

extParam->setFloatArray( "HAIR_ROOT_UVS", uv, 2*numHairs );

byte flag = 1;
extParam->setByteArray( "HAIR_FLAG_VERTEX_COLORS", &flag, 1 );

int numHairs = 2;
int numPointsPerHair = 3;
float rgb[ 3*2*3 ];
rgb[ 0 ] = 0.1; rgb[ 1 ] = 0.6; rgb[ 2 ] = 0.1;
rgb[ 3 ] = 0.5; rgb[ 4 ] = 0.2; rgb[ 5 ] = 0.4;
rgb[ 6 ] = 0.0; rgb[ 7 ] = 0.6; rgb[ 8 ] = 0.9;

rgb[ 9 ] = 0.8; rgb[ 10 ] = 0.3; rgb[ 11 ] = 0.0;
rgb[ 12 ] = 0.2; rgb[ 13 ] = 0.5; rgb[ 14 ] = 0.8;
rgb[ 15 ] = 0.1; rgb[ 16 ] = 0.1; rgb[ 17 ] = 0.6;

extParam->setFloatArray( "HAIR_VERTEX_COLORS", rgb, 3*2*3 );