awesome-attractor/projectors/Normalizer.cpp

#include "Normalizer.hpp"

#pragma mark -
#pragma mark memory

Normalizer::Normalizer(unsigned int dimension) : Projector(dimension, dimension) {
	ready = false;

	try {
		allocate();
	} catch (std::exception& e) {
		LogError("Couldn't construct Normalizer (Projector): %s\n", e.what());
		deallocate();
	}
}

Normalizer::~Normalizer() {
	//dtor
}

void Normalizer::allocate(){
	range_min = new double[outputDimension];
	range_max = new double[outputDimension];
	offset = new double[outputDimension]
}

void Normalizer::deallocate(){
	delete[] range_min;
	range_min = 0;
	delete[] range_max;
	range_max = 0;
	delete[] offset;
	offset = 0;
}

#pragma mark -
#pragma mark plot

void Normalizer::project(const double * point) {
	projectedPoint[0] = point[0]*factor + offset[0];
	projectedPoint[1] = point[1]*factor + offset[1];
	projectedPoint[2] = point[2]*factor + offset[2];

	if(!ready){
		static unsigned int state = 0;

		switch(state) {
		case 0:
			init_range();
			state = kUpdate;
			break;
		case 20000:
			finish_range();
			ready = true;
			break;
		default:
			update_range();
			break;
		}
	}
}

#pragma mark -
#pragma mark setting up

void Projector::init_range() {
	for ( unsigned int i = 0; i < intern_dim; i++ ) {
		range_min[i] = range_max[i] = project_point[i];
	}
}

void Projector::update_range() {
	for ( unsigned int i = 0; i < intern_dim; i++ ) {
		if ( project_point[i] < range_min[i] ) {
			range_min[i] = project_point[i];
		} else if ( project_point[i] > range_max[i] ) {
			range_max[i] = project_point[i];
		}
	}
}

void Projector::finish_range() {
	factor = 2.0 / (range_max[0] - range_min[0]);
	for ( unsigned int i = 1; i < intern_dim; i++ ) {
		double dist = range_max[i] - range_min[i];
		if ( factor * dist > 2.0 ) {
			factor = 2.0 / dist;
			//teh_size = canvas->size[i];
			LogDebug("Crap for dimension %d\n", i);
		}
	}

	for ( unsigned int i = 0; i < intern_dim; i++ ) {
		offset[i] = -0.5*factor*(range_min[i] + range_max[i]);
	}
}