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/*
* Modification History
*
* 2004-June-14 Jason Rohrer
* Created.
*
* 2004-June-15 Jason Rohrer
* Added a function for getting a blended control point.
*
* 2004-June-22 Jason Rohrer
* Fixed algorithmic errors in linear blend function.
*/
#include "ParameterizedObject.h"
ParameterizedObject::ParameterizedObject( FILE *inFILE, char *outError ) {
SimpleVector<ParameterSpaceControlPoint *> *controlPoints =
new SimpleVector<ParameterSpaceControlPoint*>();
SimpleVector<double> *controlPointParameterAnchors =
new SimpleVector<double>();
// keep reading parameter anchors and control points until we
// can read no more
char readError = false;
while( !readError ) {
// read the parameter space anchor
double anchor = 0;
int numRead = fscanf( inFILE, "%lf", &anchor );
if( numRead != 1 ) {
readError = true;
}
else {
// read the control point
ObjectParameterSpaceControlPoint *point =
new ObjectParameterSpaceControlPoint( inFILE,
&readError );
if( !readError ) {
controlPointParameterAnchors->push_back( anchor );
controlPoints->push_back( point );
}
else {
delete point;
}
}
}
mNumControlPoints = controlPoints->size();
mControlPoints = controlPoints->getElementArray();
mControlPointParameterAnchors =
controlPointParameterAnchors->getElementArray();
delete controlPoints;
delete controlPointParameterAnchors;
if( mNumControlPoints >= 2 ) {
*outError = false;
}
else {
// we didn't read enough control points
*outError = true;
}
}
SimpleVector<DrawableObject *> *ParameterizedObject::getDrawableObjects(
double inParameter, double *outRotationRate ) {
// blend the two points, using the distance to weight them
ObjectParameterSpaceControlPoint *blendedPoint =
getBlendedControlPoint( inParameter );
if( blendedPoint != NULL ) {
SimpleVector<DrawableObject*> *drawableObjects =
blendedPoint->getDrawableObjects();
*outRotationRate = blendedPoint->getRotationRate();
delete blendedPoint;
return drawableObjects;
}
else {
printf( "Error: no control points in object space.\n" );
*outRotationRate = 0;
return NULL;
}
}
ObjectParameterSpaceControlPoint *ParameterizedObject::getBlendedControlPoint(
double inParameter ) {
// cast result of super-class function call and return it
return (ObjectParameterSpaceControlPoint*)
ParameterizedSpace::getBlendedControlPoint( inParameter );
}
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