#include "testApp.h"


//--------------------------------------------------------------
void testApp::setup(){	
	
	ofSetVerticalSync(true);
	ofSetFrameRate(60);
	ofBackground(0, 0, 0);
	
	setRandScreenPos();
	unsigned int num_particles = 500;
	
	for (int i = 0; i < num_particles; i++){
		// position
		float pos_x = mRandPosX;
		float pos_y = mRandPosY;
		float pos_z = 0;
		
		// velocity
		float vel_x = 0;
		float vel_y = 0;
		float vel_z = 0;
		
		// force (circular force ..?)
		float theta = (i / (float) num_particles) * TWO_PI;
		float magnitude = ofRandom(0.1, 3.0);
		float frc_x = cos(theta) * magnitude;
		float frc_y = sin(theta) * magnitude;
		float frc_z = 0;
	
		particle particleNeue;
		particleNeue.init(
			pos_x, pos_y, pos_z,
			vel_x, vel_y, vel_z,
			frc_x, frc_y, frc_z
		);
		
		particles.push_back(particleNeue);
	}
	
	// timer for firing works
	mTimer = 0;
	
}

//--------------------------------------------------------------
void testApp::update(){	
	for (int i = 0; i < particles.size(); i++){
		particles[i].resetForce();
		particles[i].addDampin();
		particles[i].update();
	}
	
	mTimer++;
	if (100 == mTimer){
		restart();
		mTimer = 0;
	}	
	sprintf(debugTxt,
		"timer: %i",
		mTimer
	);
}

//--------------------------------------------------------------
void testApp::restart(){
	setRandScreenPos();
	
	for (int i = 0; i < particles.size(); i++){
		particles[i].rebegin();
		
		// position
		float pos_x = mRandPosX;
		float pos_y = mRandPosY;
		float pos_z = 0;
		
		// velocity
		float vel_x = 0;
		float vel_y = 0;
		float vel_z = 0;
		
		
		// force (circular force ..?)
		float theta = (i / (float) particles.size()) * TWO_PI;
		float magnitude = ofRandom(0.1, 3.0);
		float frc_x = cos(theta) * magnitude;
		float frc_y = sin(theta) * magnitude;
		float frc_z = 0;
		
		particles[i].init(
			pos_x, pos_y, pos_z,
			vel_x, vel_y, vel_z,
			frc_x, frc_y, frc_z
		);
	}
}

//--------------------------------------------------------------
void testApp::draw(){
	ofSetColor(0x333333);
	ofDrawBitmapString(debugTxt, 40, 40);

	for (int i = 0; i < particles.size(); i++){
		particles[i].draw();
	}

}

//--------------------------------------------------------------
void testApp::setRandScreenPos(){
	mRandPosX = ofRandom(50, ofGetWidth()-50);
	mRandPosY = ofRandom(50, ofGetHeight()-50);
}