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// Shave and a Haircut
// (c) 2019 Epic Games
// US Patent 6720962
// Callback functions (shave calls you)
#include <maya/MStringArray.h>
#include <maya/MFnField.h>
#include <maya/MDagPath.h>
#include <maya/MItSelectionList.h>
#include <maya/MVector.h>
#include <maya/MVectorArray.h>
#include <maya/MPoint.h>
#include <maya/MPointArray.h>
#include <maya/MFloatPoint.h>
#include "shaveGlobals.h"
extern "C"
{
//#ifndef _SHAVESDK_CALLBACK_
//#define _SHAVESDK_CALLBACK_
//
extern float SHAVEapply_texture( CURVEINFO * ci, VERT rest_root_worldpos, unsigned long shaveINSTID, int parm, float inbound_value )
{
// this function callback gives you the opportunity to apply external texture to any/every
// channel in shave
// CURVEINFO contains all kinds of basis information
// rest_root_worldpos is the world coord for the hair's root in the rest position
// shaveINSTID contains the ID you burned the restMEM (at creation) that's
// being rendered
// parm tells you which channel is being evaluated from SHAVEPARMS
// this function is called during rendering
// inbound contains the param value as evaluated internally (slider * weight * texture)
// do something to inbound value here before it's returned
return ( inbound_value );
}
// this needs to be here as well, but you won't be using it
// the 'MAYA' in the name is due to back compatibility with a MAYAShave version
extern void MAYAexternal_forces( VERT * lastpos, VERT * velocity )
{
MStringArray fieldList;
MStatus stat;
MDagPath dagPath;
MSelectionList list;
MFnField field;
int fieldCount = 0;
MGlobal::executeCommand( "ls -dag -type field", fieldList );
MPoint p( lastpos->x, lastpos->y, lastpos->z );
MVector v( velocity->x, velocity->y, velocity->z );
MPointArray pointArray;
pointArray.append( p );
MVectorArray forces;
MVectorArray velocityArray;
velocityArray.append( v );
MDoubleArray massArray;
fieldCount = fieldList.length( );
for( int i = 0; i < fieldCount; i++ )
{
list.add( fieldList[i] );
}
MItSelectionList listIter( list );
for( fieldList.reset( ); !fieldList.isDone( ); fieldList.next( ) )
{
fieldList.getDagPath( dagPath );
field.setObject( dagPath );
stat = field.getForceAtPoint( pointArray, velocityArray, massArray, forces, NULL );
}
// forces are worldspace vectors
velocity->x += forces[0].x * 0.01;
velocity->y += forces[0].y * 0.01;
velocity->z += forces[0].z * 0.01;
}
// this is an illumination callback (see docs)
extern VERT SHAVEapply_illumination( int LIGHTID, VERT wpos, VERT vector, VERT color )
{
// this function is now obsolete!!
// ranges are 0.0 - 1.0 (return isn't clipped until after shading)
// modify or replace 'color' - it contains light info for current test before
// shave shadows are applied
return ( color );
}
extern void SHAVEapply_illuminationWF( int LIGHTID, WFTYPE * samples )
{
// ranges are 0.0 - 1.0 (return isn't clipped until after shading)
// modify or replace 'samples->color' - it contains light info for current test before
// shave shadows are applied
// samples->v is the position
// samples->totalverts is the total number of points
}
extern float SHAVEapply_falloff( int lightNUM, VERT pos, float cone )
{
return ( cone );
}
// this is a callback for applying atmospherics/depth cueing
extern VERT SHAVEapply_atmosphere( VERT wpos, VERT inbound_color )
{
// range = 0.0 - 255.0 (shave will clip out of bound returns)
// do your tint here based on wpos
// ie - make it really bright :
// inbound_color.x*=3.0f;
// inbound_color.y*=3.0f;
// inbound_color.z*=3.0f;
return ( inbound_color );
}
//#endif
extern void SHAVEcoord_convertTOSHAVE( VERT * in )
{
}
extern void SHAVEcoord_convertFROMSHAVE( VERT * in )
{
}
};
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