void drawLamp(RtPoint position, RtFloat height) {
/* Draw the base of the lamp */
RiTransformBegin();
RiTranslate(position[0], position[1] + 1, position[2]);
RiRotate(90.0, 1.0, 0.0, 0.0);
RiDisk(0.0, 4.0, 360.0, RI_NULL);
RiCylinder(4.0, 0.0, 1.0, 360.0, RI_NULL);
RiTransformEnd();
/* Draw the stem of the lamp */
RiTransformBegin();
RiTranslate(position[0], position[1] + height + 1, position[2]);
RiRotate(90.0, 1.0, 0.0, 0.0);
RiCylinder(0.5, 0.0, height, 360.0, RI_NULL);
RiTransformEnd();
/* Draw the bell shaped part of the lamp */
RiTransformBegin();
RiTranslate(position[0], position[1] + height + 3, position[2]);
RiRotate(100, 1.0, 0, 0);
RiRotate(45, 0, 1.0, 0);
RiParaboloid(4, 0, 6, 360, RI_NULL);
RiTransformEnd();
}
int Renderer::preview( const std::string& fileName, const liqPreviewShaderOptions& options )
{
CM_TRACE_FUNC("Renderer::preview("<<fileName<<","<<options.shaderNodeName<<")");
std::string shaderFileName;
liqShader currentShader;
MObject shaderObj;
MString shader_type_TempForRefactoring;// [2/14/2012 yaoyansi]
if ( options.fullShaderPath )
{
// a full shader path was specified
//cout <<"[liquid] got full path for preview !"<<endl;
//shaderFileName = const_cast<char*>(options.shaderNodeName);
std::string tmp( options.shaderNodeName );
currentShader.setShaderFileName(tmp.substr( 0, tmp.length() - 4 ) );
if ( options.type == "surface" ){
assert(0&&"we should use currentShader.shader_type_ex = \"surface\"");
//currentShader.shader_type = SHADER_TYPE_SURFACE;// [2/14/2012 yaoyansi]
shader_type_TempForRefactoring = "surface";
}else if ( options.type == "displacement" ){
assert(0&&"we should use currentShader.shader_type_ex = \"displacement\"");
//currentShader.shader_type = SHADER_TYPE_DISPLACEMENT;// [2/14/2012 yaoyansi]
shader_type_TempForRefactoring = "displacement";
}
//cout <<"[liquid] options.shaderNodeName = " << options.shaderNodeName << endl;
//cout <<"[liquid] options.type = "<<options.type<<endl;
}
else
{
// a shader node was specified
MSelectionList shaderNameList;
shaderNameList.add( options.shaderNodeName.c_str() );
shaderNameList.getDependNode( 0, shaderObj );
if( shaderObj == MObject::kNullObj )
{
MGlobal::displayError( std::string( "Can't find node for " + options.shaderNodeName ).c_str() );
RiEnd();
return 0;
}
currentShader = liqShader( shaderObj );
shader_type_TempForRefactoring = currentShader.shader_type_ex;
shaderFileName = currentShader.getShaderFileName();
}
MFnDependencyNode assignedShader( shaderObj );
// Get the Pathes in globals node
MObject globalObjNode;
MString liquidShaderPath = "",liquidTexturePath = "",liquidProceduralPath = "";
MStatus status;
MSelectionList globalList;
// get the current project directory
MString MELCommand = "workspace -q -rd";
MString MELReturn;
MGlobal::executeCommand( MELCommand, MELReturn );
MString liquidProjectDir = MELReturn;
status = globalList.add( "liquidGlobals" );
if ( globalList.length() > 0 )
{
status.clear();
status = globalList.getDependNode( 0, globalObjNode );
MFnDependencyNode globalNode( globalObjNode );
liquidGetPlugValue( globalNode, "shaderPath", liquidShaderPath, status);
liquidGetPlugValue( globalNode, "texturePath", liquidTexturePath, status);
liquidGetPlugValue( globalNode, "proceduralPath", liquidProceduralPath, status);
}
if( fileName.empty() )
{
RiBegin_liq( NULL );
#ifdef DELIGHT
//RtPointer callBack( progressCallBack );
//RiOption( "statistics", "progresscallback", &callBack, RI_NULL );
#endif
}
else {
liquidMessage2(messageInfo,"preview rib file: [%s]", fileName.c_str());
RiBegin_liq( (RtToken)fileName.c_str() );
}
std::string liquidHomeDir = liquidSanitizeSearchPath( getEnvironment( "LIQUIDHOME" ) );
std::string shaderPath( "&:@:.:~:" + liquidHomeDir + "/lib/shaders" );
std::string texturePath( "&:@:.:~:" + liquidHomeDir + "/lib/textures" );
std::string proceduralPath( "&:@:.:~:" + liquidHomeDir + "/lib/shaders" );
std::string projectDir = std::string( liquidSanitizeSearchPath( liquidProjectDir ).asChar() );
if ( liquidProjectDir != "")
{
shaderPath += ":" + projectDir;
texturePath += ":" + projectDir;
proceduralPath += ":" + projectDir;
}
if ( liquidShaderPath != "" )
shaderPath += ":" + std::string( liquidSanitizeSearchPath( parseString( liquidShaderPath, false ) ).asChar());
if ( liquidTexturePath != "" )
texturePath += ":" + std::string( liquidSanitizeSearchPath( parseString( liquidTexturePath, false) ).asChar());
if ( liquidProceduralPath != "" )
proceduralPath += ":" + std::string( liquidSanitizeSearchPath( parseString( liquidProceduralPath, false) ).asChar());
RtString list( const_cast< RtString >( shaderPath.c_str() ) );
RiOption( "searchpath", "shader", &list, RI_NULL );
RtString texPath( const_cast< RtString >( texturePath.c_str() ) );
if( texPath[ 0 ] )
RiOption( "searchpath","texture", &texPath, RI_NULL );
RtString procPath( const_cast< RtString >( proceduralPath.c_str() ) );
if( procPath[ 0 ] )
RiOption( "searchpath","procedural", &procPath, RI_NULL );
RiShadingRate( ( RtFloat )options.shadingRate );
RiPixelSamples( options.pixelSamples, options.pixelSamples );
#ifdef PRMAN
if ( MString( "PRMan" ) == liqglo.liquidRenderer.renderName )
RiPixelFilter( RiCatmullRomFilter, 4., 4. );
#elif defined( DELIGHT )
if ( MString( "3Delight" ) == liqglo.liquidRenderer.renderName )
RiPixelFilter( RiSeparableCatmullRomFilter, 4., 4. );
// RiPixelFilter( RiMitchellFilter, 4., 4.);
#else
RiPixelFilter( RiCatmullRomFilter, 4., 4. );
#endif
RiFormat( ( RtInt )options.displaySize, ( RtInt )options.displaySize, 1.0 );
if( options.backPlane )
{
RiDisplay( const_cast< RtString >( options.displayName.c_str() ),
const_cast< RtString >( options.displayDriver.c_str() ), RI_RGB, RI_NULL );
}
else
{ // Alpha might be useful
RiDisplay( const_cast< RtString >( options.displayName.c_str() ),
const_cast< RtString >( options.displayDriver.c_str() ), RI_RGBA, RI_NULL );
}
RtFloat fov( 22.5 );
RiProjection( "perspective", "fov", &fov, RI_NULL );
RiTranslate( 0, 0, 2.75 );
RiExposure(1, currentShader.m_previewGamma);
RtInt visible = 1;
RtString transmission = "transparent";
RiAttribute( "visibility", ( RtToken ) "camera", &visible, RI_NULL );
RiAttribute( "visibility", ( RtToken ) "trace", &visible, RI_NULL );
// RiAttribute( "visibility", ( RtToken ) "transmission", ( RtPointer ) &transmission, RI_NULL );
RiWorldBegin();
RiReverseOrientation();
RiTransformBegin();
RiRotate( -90., 1., 0., 0. );
RiCoordinateSystem( "_environment" );
RiTransformEnd();
RtLightHandle ambientLightH, directionalLightH;
RtFloat intensity;
intensity = 0.05 * (RtFloat)options.previewIntensity;
ambientLightH = RiLightSource( "ambientlight", "intensity", &intensity, RI_NULL );
intensity = 0.9 * (RtFloat)options.previewIntensity;
RtPoint from;
RtPoint to;
from[0] = -1.; from[1] = 1.5; from[2] = -1.;
to[0] = 0.; to[1] = 0.; to[2] = 0.;
RiTransformBegin();
RiRotate( 55., 1, 0, 0 );
RiRotate( 30., 0, 1, 0 );
directionalLightH = RiLightSource( "liquiddistant", "intensity", &intensity, RI_NULL );
RiTransformEnd();
intensity = 0.2f * (RtFloat)options.previewIntensity;
from[0] = 1.3f; from[1] = -1.2f; from[2] = -1.;
RiTransformBegin();
RiRotate( -50., 1, 0, 0 );
RiRotate( -40., 0, 1, 0 );
directionalLightH = RiLightSource( "liquiddistant", "intensity", &intensity, RI_NULL );
RiTransformEnd();
RiAttributeBegin();
//ymesh omit this section, because liqShader::writeRibAttributes() do this work in that branch
//I don't use liqShader::writeRibAttributes(), so I use this section. -yayansi
float displacementBounds = 0.;
liquidGetPlugValue( assignedShader, "displacementBound", displacementBounds, status);
if ( displacementBounds > 0. )
{
RtString coordsys = "shader";
RiArchiveRecord( RI_COMMENT, "ymesh omit this section, because liqShader::writeRibAttributes do this work in that branch" );
RiAttribute( "displacementbound", "coordinatesystem", &coordsys, RI_NULL );
RiAttribute( "displacementbound", "sphere", &displacementBounds, "coordinatesystem", &coordsys, RI_NULL );
}
//LIQ_GET_SHADER_FILE_NAME( shaderFileName, options.shortShaderName, currentShader );
// output shader space
MString shadingSpace;
liquidGetPlugValue( assignedShader, "shaderSpace", shadingSpace, status);
if ( shadingSpace != "" )
{
RiTransformBegin();
RiCoordSysTransform( (char*) shadingSpace.asChar() );
}
RiTransformBegin();
// Rotate shader space to make the preview more interesting
RiRotate( 60., 1., 0., 0. );
RiRotate( 60., 0., 1., 0. );
RtFloat scale( 1.f / ( RtFloat )options.objectScale );
RiScale( scale, scale, scale );
if ( shader_type_TempForRefactoring=="surface" || shader_type_TempForRefactoring=="shader"/*currentShader.shader_type == SHADER_TYPE_SURFACE || currentShader.shader_type == SHADER_TYPE_SHADER */ ) // [2/14/2012 yaoyansi]
{
RiColor( currentShader.rmColor );
RiOpacity( currentShader.rmOpacity );
//cout << "Shader: " << shaderFileName << endl;
if ( options.fullShaderPath )
RiSurface( (RtToken)shaderFileName.c_str(), RI_NULL );
else
{
liqShader liqAssignedShader( shaderObj );
liqAssignedShader.forceAs = SHADER_TYPE_SURFACE;
liqAssignedShader.write();
}
}
else if ( shader_type_TempForRefactoring=="displacement"/*currentShader.shader_type == SHADER_TYPE_DISPLACEMENT*/ ) // [2/14/2012 yaoyansi]
{
RtToken Kd( "Kd" );
RtFloat KdValue( 1. );
#ifdef GENERIC_RIBLIB
// !!! current ribLib has wrong interpretation of RiSurface parameters
RiSurface( "plastic", Kd, &KdValue, RI_NULL );
#else
RiSurface( "plastic", &Kd, &KdValue, RI_NULL );
#endif
if ( options.fullShaderPath )
RiDisplacement( (RtToken)shaderFileName.c_str(), RI_NULL );
else
{
liqShader liqAssignedShader( shaderObj );
liqAssignedShader.forceAs = SHADER_TYPE_DISPLACEMENT;
liqAssignedShader.write();
}
}
RiTransformEnd();
if ( shadingSpace != "" )
RiTransformEnd();
switch( options.primitiveType )
{
case CYLINDER:
{
RiReverseOrientation();
RiScale( 0.95, 0.95, 0.95 );
RiRotate( 60., 1., 0., 0. );
RiTranslate( 0., 0., -0.05 );
RiCylinder( 0.5, -0.3, 0.3, 360., RI_NULL );
RiTranslate( 0., 0., 0.3f );
RiTorus( 0.485, 0.015, 0., 90., 360., RI_NULL );
RiDisk( 0.015, 0.485, 360., RI_NULL );
RiTranslate( 0., 0., -0.6 );
RiTorus( 0.485, 0.015, 270., 360., 360., RI_NULL );
RiReverseOrientation();
RiDisk( -0.015, 0.485, 360., RI_NULL );
break;
}
case TORUS:
{
RiRotate( 45., 1., 0., 0. );
RiTranslate( 0., 0., -0.05 );
RiReverseOrientation();
RiTorus( 0.3f, 0.2f, 0., 360., 360., RI_NULL );
break;
}
case PLANE:
{
RiScale( 0.5, 0.5, 0.5 );
RiReverseOrientation();
static RtPoint plane[4] = {
{ -1., 1., 0. },
{ 1., 1., 0. },
{ -1., -1., 0. },
{ 1., -1., 0. }
};
RiPatch( RI_BILINEAR, RI_P, (RtPointer) plane, RI_NULL );
break;
}
case TEAPOT:
{
RiTranslate( 0.06f, -0.18f, 0. );
RiRotate( -120., 1., 0., 0. );
RiRotate( 130., 0., 0., 1. );
RiScale( 0.2f, 0.2f, 0.2f );
RiArchiveRecord( RI_VERBATIM, "Geometry \"teapot\"" );
break;
}
case CUBE:
{
/* Lovely cube with rounded corners and edges */
RiScale( 0.35f, 0.35f, 0.35f );
RiRotate( 60., 1., 0., 0. );
RiRotate( 60., 0., 0., 1. );
RiTranslate( 0.11f, 0., -0.08f );
RiReverseOrientation();
static RtPoint top[ 4 ] = { { -0.95, 0.95, -1. }, { 0.95, 0.95, -1. }, { -0.95, -0.95, -1. }, { 0.95, -0.95, -1. } };
RiPatch( RI_BILINEAR, RI_P, ( RtPointer ) top, RI_NULL );
static RtPoint bottom[ 4 ] = { { 0.95, 0.95, 1. }, { -0.95, 0.95, 1. }, { 0.95, -0.95, 1. }, { -0.95, -0.95, 1. } };
RiPatch( RI_BILINEAR, RI_P, ( RtPointer ) bottom, RI_NULL );
static RtPoint right[ 4 ] = { { -0.95, -1., -0.95 }, { 0.95, -1., -0.95 }, { -0.95, -1., 0.95 }, { 0.95, -1., 0.95 } };
RiPatch( RI_BILINEAR, RI_P, ( RtPointer ) right, RI_NULL );
static RtPoint left[ 4 ] = { { 0.95, 1., -0.95 }, { -0.95, 1., -0.95 }, { 0.95, 1., 0.95 }, { -0.95, 1., 0.95 } };
RiPatch( RI_BILINEAR, RI_P, ( RtPointer ) left, RI_NULL );
static RtPoint front[ 4 ] = { {-1., 0.95, -0.95 }, { -1., -0.95, -0.95 }, { -1., 0.95, 0.95 }, { -1., -0.95, 0.95 } };
RiPatch( RI_BILINEAR, RI_P, ( RtPointer ) front, RI_NULL );
static RtPoint back[ 4 ] = { { 1., -0.95, -0.95 }, { 1., 0.95, -0.95 }, { 1., -0.95, 0.95 }, { 1., 0.95, 0.95 } };
RiPatch( RI_BILINEAR, RI_P, ( RtPointer ) back, RI_NULL );
RiTransformBegin();
RiTranslate( 0.95, 0.95, 0. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( 0.95, -0.95, 0. );
RiRotate( -90., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( -0.95, 0.95, 0. );
RiRotate( 90., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( -0.95, -0.95, 0. );
RiRotate( 180., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( 0., 0., 0.95 );
RiTransformBegin();
RiTransformBegin();
RiTranslate( 0.95, 0.95, 0. );
RiSphere( 0.05, 0., 0.05, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( 0.95, -0.95, 0. );
RiRotate( -90., 0., 0., 1. );
RiSphere( 0.05, 0., 0.05, 90., RI_NULL );
RiTransformEnd();
RiRotate( 180., 0., 0., 1. );
RiTransformBegin();
RiTranslate( 0.95, 0.95, 0. );
RiSphere( 0.05, 0., 0.05, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( 0.95, -0.95, 0. );
RiRotate( -90., 0., 0., 1. );
RiSphere( 0.05, 0., 0.05, 90., RI_NULL );
RiTransformEnd();
RiTransformEnd();
RiRotate( 90., 1., 0., 0. );
RiTransformBegin();
RiTranslate( 0.95, 0., 0. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( -0.95, 0., 0. );
RiRotate( 90., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiRotate( 90., 0., 1., 0. );
RiTransformBegin();
RiTranslate( 0.95, 0., 0. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( -0.95, 0., 0. );
RiRotate( 90., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformEnd();
RiTransformBegin();
RiTranslate( 0., 0., -0.95 );
RiTransformBegin();
RiTransformBegin();
RiTranslate( 0.95, 0.95, 0. );
RiSphere( 0.05, -0.05, 0., 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( 0.95, -0.95, 0. );
RiRotate( -90., 0., 0., 1. );
RiSphere( 0.05, -0.05, 0., 90., RI_NULL );
RiTransformEnd();
RiRotate( 180., 0., 0., 1. );
RiTransformBegin();
RiTranslate( 0.95, 0.95, 0. );
RiSphere( 0.05, -0.05, 0., 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( 0.95, -0.95, 0. );
RiRotate( -90., 0., 0., 1. );
RiSphere( 0.05, -0.05, 0., 90., RI_NULL );
RiTransformEnd();
RiTransformEnd();
RiRotate( 90., 1., 0., 0. );
RiTransformBegin();
RiTranslate( -0.95, 0., 0. );
RiRotate( 180., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( 0.95, 0., 0. );
RiRotate( -90., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiRotate( 90., 0., 1., 0. );
RiTransformBegin();
RiTranslate( 0.95, 0., 0. );
RiRotate( -90., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformBegin();
RiTranslate( -0.95, 0., 0. );
RiRotate( 180., 0., 0., 1. );
RiCylinder( 0.05, -0.95, 0.95, 90., RI_NULL );
RiTransformEnd();
RiTransformEnd();
break;
}
case CUSTOM:
{
//cout <<"custom : "<<options.customRibFile<<endl;
if ( fileExists( options.customRibFile.c_str() ) )
{
RiReadArchive( const_cast< RtToken >( options.customRibFile.c_str() ), NULL, RI_NULL );
}
break;
}
case SPHERE:
default:
{
RiRotate( 60., 1., 0., 0. );
RiReverseOrientation();
RiSphere( 0.5, -0.5, 0.5, 360., RI_NULL );
break;
}
}
RiAttributeEnd();
/*
* Backplane
*/
if( options.backPlane )
{
if ( options.customBackplane.empty() )
{
RiAttributeBegin();
RiScale( 0.91, 0.91, 0.91 );
if( MString("displacement")==shader_type_TempForRefactoring/*SHADER_TYPE_DISPLACEMENT == currentShader.shader_type*/ ) // [2/14/2012 yaoyansi]
{
RtColor bg = { 0.698, 0.698, 0. };
RiColor( bg );
} else
RiSurface( const_cast< RtToken >( options.backPlaneShader.c_str() ), RI_NULL );
static RtPoint backplane[4] = {
{ -1., 1., 2. },
{ 1., 1., 2. },
{ -1., -1., 2. },
{ 1., -1., 2. }
};
RiPatch( RI_BILINEAR, RI_P, (RtPointer) backplane, RI_NULL );
RiAttributeEnd();
}
else
{
if ( fileExists( options.customBackplane.c_str() ) )
{
RiAttributeBegin();
RiScale( 1., 1., -1. );
RiReadArchive( const_cast< RtString >( options.customBackplane.c_str() ), NULL, RI_NULL );
RiAttributeEnd();
}
}
}
RiWorldEnd();
/* this caused maya to hang up under windoof - Alf
#ifdef _WIN32
// Wait until the renderer is done
while( !fileFullyAccessible( options.displayName.c_str() ) );
#endif
*/
RiEnd();
if(liqglo.m_logMsgFlush)
{
fflush( NULL );
}
}
void drawPencil() {
RtColor pink = {1.0, 0.5, 0.5};
RtColor silver = {0.7, 0.7, 0.7};
RtColor yellow = {1.0, 0.7, 0.0};
RtColor tan = {0.9, 0.8, 0.5};
RtColor black = {0.1, 0.1, 0.1};
RtPoint pencilSide[4] = {{-4.0, 0.1, -0.1}, {-4.0, 0.1, 0.1}, {4.0, 0.1, 0.1}, {4.0, 0.1, -0.1}};
RiColor(yellow);
RiSurface("paintedmatte", RI_NULL);
/* Draw all six sides of a pencil, each 8.0"x0.2" in size */
RiPolygon(4, RI_P, pencilSide, RI_NULL);
RiRotate(60.0, 1.0, 0.0, 0.0);
RiPolygon(4, RI_P, pencilSide, RI_NULL);
RiRotate(60.0, 1.0, 0.0, 0.0);
RiPolygon(4, RI_P, pencilSide, RI_NULL);
RiRotate(60.0, 1.0, 0.0, 0.0);
RiPolygon(4, RI_P, pencilSide, RI_NULL);
RiRotate(60.0, 1.0, 0.0, 0.0);
RiPolygon(4, RI_P, pencilSide, RI_NULL);
RiRotate(60.0, 1.0, 0.0, 0.0);
RiPolygon(4, RI_P, pencilSide, RI_NULL);
/* Draw the eraser */
RiTransformBegin();
RiTranslate(4.2, 0.0, 0.0);
/* Draw the metal part around the eraser */
RiTransformBegin();
RiTranslate(-0.2, 0.0, 0.0);
RiRotate(-90.0, 0.0, 1.0, 0.0);
RiColor(silver);
RiSurface("metal", RI_NULL);
RiCylinder(0.15, 0.0, 0.3, 360.0, RI_NULL);
RiTransformEnd();
RiRotate(-90.0, 0.0, 1.0, 0.0);
RiColor(pink);
RiSurface("matte", RI_NULL);
RiDisk(0.0, 0.15, 360, RI_NULL);
RiCylinder(0.15, 0.0, 0.2, 360, RI_NULL);
RiTransformEnd();
RiColor(tan);
RiSurface("matte", RI_NULL);
/* Draw the exposed wood part at the bottom of the pencil */
RiTranslate(-4.0, 0.0, 0.0);
RiTransformBegin();
RiRotate(-90.0, 0.0, 1.0, 0.0);
RiCone(1.0, 0.15, 360, RI_NULL);
RiTransformEnd();
/* Draw the lead of the pencil */
RiTranslate(-0.7, 0.0, 0.0);
RiRotate(-90.0, 0.0, 1.0, 0.0);
RiColor(black);
RiCone(0.3, 0.05, 360, RI_NULL);
}