//===========================================================================
//                                     FLOCKING - 1000 CANVAS RENDERED AGENTS
//                                            Version 11/3D - Multiple Timers
//                                                            25 November 2010
//
//                                   EVERYTHING RUNS MORE SLOWLY IN WINDOWS 7
//
//   This application automatically expands to the size of the display:
//      Form1->AutoSize = NOT false;
//      Form1->BorderStyle = bsNone;
//      Form1 and PaintBox1 sizes are set to MonitorHeight and MonitorWidth.
//
//   Since the standard Windows controls do not appear:
//      Event handlers must be created to execute Form1->Close().
//      A PopUp Menu is used to show and hide the controls.
//
//   To make the application run with continuously varying parameters:
//      Nine timers control the positions of ten TrackBars.
//      The suspect population timer has been disabled.*
//
//                                     *Access Violations occur unpredictably
//===========================================================================

// optimize by not computing z when not required
// need option to make agents smaller as a function of depth

#include <vcl.h>
#include <math.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;

#define POP 1000          // maximum population   // still violation if 800

// ====================================================== VARIABLES & CLASSES

int depth = 100;

bool stop = true;
bool move = false;
bool anAgentHasBeenChosen = false;
bool fixCursorXY = false;
bool timers = false;
bool anaglyph = false;

// for throwing an agent
double downX, downY;
double upX, upY;
double downUpX, downUpY;
double timeUp, timeDown;
double timeDownUp;
double weightedAveDirection;
double tangent;
double sumXdistancesFromMe, sumYdistancesFromMe, sumZdistancesFromMe;
double weightedAveSumXdistances, weightedAveSumYdistances, weightedAveSumZdistances;
double xDistanceFromMe, yDistanceFromMe, zDistanceFromMe;
double ave_abs_dX, ave_abs_dY;
double weightedAveVelocity, sum_dH, my_H;
double noiseX, noiseY;
int variance;
double directionVariance;

int iterations;
int delay = 0;
int i;
int dist, chosen;
int pop = 500;                     // running population <= POP
int lastPop = 100;
int rule = 0;
int radius = 20;
int neighbors;
int independence = 20;
int cursorX, cursorY, cursorZ;
int monitorWidth = 900;
int monitorHeight = 900;

TColor back = clBlack;
TColor fore = clWhite;
TColor userColor = clWhite;          // user chosen color
TColor dynaColor = clWhite;          // dynamically chosen color
TColor defaultColor = clWhite;


//--------------------------------------------------- Color Ramp Version 2008
TColor colorRamp(int part, int whole)
{
	if (whole == 0) whole++;               // prevent divide by zero
	int pixelDistanceAlongEdges = (part * 1792) / whole;
	int red, green, blue;
	// Which edge of the color cube are we on?
	if (pixelDistanceAlongEdges < 256) {        // from BLACK to BLUE
		red = 0; green = 0; blue = pixelDistanceAlongEdges;
	}
	else if (pixelDistanceAlongEdges < 512) {   // from BLUE to CYAN
		red = 0; green = pixelDistanceAlongEdges - 256; blue = 255;
	}
	else if (pixelDistanceAlongEdges < 768) {   // from CYAN to GREEN
		red = 0; green = 255; blue = 255 - (pixelDistanceAlongEdges - 512);
	}
	else if (pixelDistanceAlongEdges < 1024) {  // from GREEN to YELLOW
		red = (pixelDistanceAlongEdges - 768); green = 255; blue = 0;
	}
	else if (pixelDistanceAlongEdges < 1280) {  // from YELLOW to RED
		red = 255; green= 255-(pixelDistanceAlongEdges - 1024); blue = 0;
	}
	else if (pixelDistanceAlongEdges < 1536) {  // from RED to MAGENTA
		red = 255; green= 0; blue = pixelDistanceAlongEdges - 1280;
	}
	else {                                     // from MAGENTA to WHITE
		red = 255; green = pixelDistanceAlongEdges - 1537; blue = 255;
	}
	return static_cast<TColor>(RGB(red, green, blue));
}

// this is a description of an abstract class called "agents"
class agentClass {
	public:
		double x, y, z ;
		double dx, dy, dz;
		double dxx, dyy, dzz;

		TPoint twoDPoints[3];
		TPoint threeDPoints[3];

		TColor color;
		float height, width;
		int seeking;

		void erase (void) {       // size is dependent upon speed
//			twoDPoints[0].x = x + dx * 10;
//			twoDPoints[0].y = y + dy * 10;
//			twoDPoints[1].x = x - dx * 10 + 4 * dy;
//			twoDPoints[1].y = y - dy * 10 - 4 * dx;
//			twoDPoints[2].x = x - dx * 10 - 4 * dy;
//			twoDPoints[2].y = y - dy * 10 + 4 * dx;
			if (anaglyph) {                                     // 3d
				Form1->PaintBox1->Canvas->Pen->Color = back;
				Form1->PaintBox1->Canvas->Brush->Color = back;
				Form1->PaintBox1->Canvas->Brush->Style = bsSolid; //bsClear;
//				Form1->PaintBox1->Canvas->Brush->Color = clBlack;
//				Form1->PaintBox1->Canvas->Brush->Style = bsCross;
				Form1->PaintBox1->Canvas->Polygon(twoDPoints, 2);
				Form1->PaintBox1->Canvas->Polygon(threeDPoints, 2);
			}
			else {                                              // 2d
				Form1->PaintBox1->Canvas->Pen->Color = back;
				Form1->PaintBox1->Canvas->Brush->Color = back;
				Form1->PaintBox1->Canvas->Brush->Style = bsSolid;  //////////////////////////////////////
				Form1->PaintBox1->Canvas->Polygon(twoDPoints, 2);
			}
		}

		void draw (void) {         // size is dependent upon speed
			twoDPoints[0].x = x + dx * 10;
			twoDPoints[0].y = y + dy * 10;
			twoDPoints[1].x = x - dx * 10 + 4 * dy;
			twoDPoints[1].y = y - dy * 10 - 4 * dx;
			twoDPoints[2].x = x - dx * 10 - 4 * dy;
			twoDPoints[2].y = y - dy * 10 + 4 * dx;

			if (!anaglyph) {                                            // 2d
				if (Form1->RadioGroupColor->ItemIndex == 0) {  // your color
					dynaColor = color;
				}
				if (Form1->RadioGroupColor->ItemIndex == 1) { // by speed
					dynaColor = colorRamp(velocity() * 300, 1000);
				}
				if (Form1->RadioGroupColor->ItemIndex == 2) { // by location
					dynaColor = colorRamp(x + y, monitorWidth * 1.8);
				}
				if (Form1->RadioGroupColor->ItemIndex == 3) { // by neighbors
					dynaColor = colorRamp(neighbors + 5, 30);
				}
				Form1->PaintBox1->Canvas->Brush->Color = dynaColor;
				Form1->PaintBox1->Canvas->Polygon(twoDPoints, 2);
			}
			else {                                                      // 3d

				threeDPoints[0].x = x + dx * 10 +
					(monitorHeight / 2 - z)/ depth;
				threeDPoints[0].y = y + dy * 10;
				threeDPoints[1].x = x - dx * 10 + 4 * dy +
					(monitorHeight / 2 - z) / depth;
				threeDPoints[1].y = y - dy * 10 - 4 * dx;
				threeDPoints[2].x = x - dx * 10 - 4 * dy +
					(monitorHeight / 2 - z) / depth;
				threeDPoints[2].y = y - dy * 10 + 4 * dx;

				Form1->PaintBox1->Canvas->Pen->Color = clRed;
				Form1->PaintBox1->Canvas->Brush->Style = bsClear;
//				Form1->PaintBox1->Canvas->Brush->Color = clRed;
//				Form1->PaintBox1->Canvas->Brush->Style = bsCross;
				Form1->PaintBox1->Canvas->Polygon(twoDPoints, 2);
				Application->ProcessMessages();
				Form1->PaintBox1->Canvas->Pen->Color = clAqua;
				Form1->PaintBox1->Canvas->Brush->Style = bsClear;
//				Form1->PaintBox1->Canvas->Brush->Color = clAqua;
//				Form1->PaintBox1->Canvas->Brush->Style = bsCross;
				Form1->PaintBox1->Canvas->Polygon(threeDPoints, 2);
			}

			if (Form1->RadioGroupTrail->ItemIndex == 2) {  // trails?
				Form1->PaintBox1->Canvas->Pen->Color = dynaColor;
				Application->ProcessMessages();
			}
			else Form1->PaintBox1->Canvas->Pen->Color = clBlack;


		}

		void shrink (void) {
			erase();
			// needs code for Polygon
			draw();
		}

		void grow (void) {
			erase();
			// needs code for Polygon
			draw();
		}

		void move (void) {
			x += dx;
			y += dy;
			if (anaglyph) z += dz;
			if (Form1->RadioGroupSpace->ItemIndex == 0) {         // Bounce
				if ((x > monitorWidth) || (x < 0)) {             // was 885, 155
					dx = -dx;
				}
				if ((y > monitorHeight) || (y < 0)) {
					dy = -dy;
				}
				if (anaglyph && (z > monitorHeight || z < 0)) {
					dz = -dz;
				}
			}
			else {                                                // Wrap
				if (x > monitorWidth) x = 0;               // was 895, 5
				if (x < 0) x = monitorWidth;
				if (y > monitorHeight) y = 0;
				if (y < 0) y = monitorHeight;
				if (anaglyph && (z > monitorHeight)) z = 0;
				if (anaglyph && (z < 0)) z = monitorHeight;
            }
			draw();
		}

		double velocity (void) {        // is a function of dy, dx
			double temp = sqrt(pow(dx, 2) + pow(dy, 2));
			//if (anaglyph) temp = sqrt(pow(temp, 2) + pow(dz, 2));
			return temp;
		}

		double direction (void) {
			if (dx == 0) dx = .00001;
			return atan2(dy, dx);
        }
};

agentClass agent[POP];     // creates an array "agent" of type "agentClass"

// ================================================================ FUNCTIONS

int mv (int i) {
	if (i < 0) i = pop;
	if (i < pop) i = 0;
	return i;
}

void reset (void) {
	//Form1->PaintBox1->Refresh();
	Form1->PaintBox1->Canvas->Refresh();
	// get depth for 3d
	if (anaglyph) depth = Form1->TrackBarDepth->Position;
	iterations = 0;
	for (int i = 0; i < pop; i++) {
		agent[i].erase();
		agent[i].height = 10;
		agent[i].width = 10;
		agent[i].seeking = random(pop);
		//agent[i].color = defaultColor;
		//agent[i].direction =  0; //double(i) / 3;   computed from dy, dx
		agent[i].x = random(monitorWidth) - 1; //random(890) + 5;   // in a 900 x 900 world
		agent[i].y = random(monitorHeight) - 1; //random(890) + 5;   // in a 900 x 900 world
		agent[i].z = random(monitorHeight) - 1; //random(890) + 5;   // in a 900 x 900 world
		agent[i].dy = double(random(100) - 50) / 25.00;    // -2 to +2
		agent[i].dx = double(random(100) - 50) / 25.00;    // -2 to +2
		agent[i].dz = double(random(100) - 50) / 25.00;    // -2 to +2
		agent[i].draw();
		if (rule == 5) {
			if (i % 4 == 0) agent[i].color = clAqua;
			if (i % 4 == 1) agent[i].color = clFuchsia;
			if (i % 4 == 2) agent[i].color = clYellow;
			if (i % 4 == 3) agent[i].color = clWhite;
		}
		else agent[i].color = clWhite;
	}
}

void initialize (void) {
	for (int i = 0; i < POP; i++) {
		agent[i].erase();
		agent[i].height = 10;
		agent[i].width = 10;
		agent[i].color = defaultColor;
		//agent[i].direction = 0;  // double(i) / 3;     computed from dy, dx
		agent[i].x = random(monitorWidth) - 1;
		agent[i].y = random(monitorHeight) - 1;
		agent[i].z = random(monitorHeight) - 1;
		agent[i].dy = double(random(100) - 50) / 25.00;    // -2 to +2
		agent[i].dx = double(random(100) - 50) / 25.00;    // -2 to +2
		agent[i].dz = double(random(100) - 50) / 25.00;    // -2 to +2
		agent[i].draw();
	}
	Form1->TrackBarSpeed->Position = Form1->TrackBarSpeed->Max;
}
int nneighbor (int me) {           // suspect
	int nn;
	int minDist = 10000;
	for (int i = 0; i < pop; i++) {
		if (i == me) continue;                        // don't count yourself

		dist = sqrt(                             // true Pythagorean distance
			pow((agent[i].x - agent[me].x), 2) +
			pow((agent[i].y - agent[me].y), 2)
		);
		if (anaglyph) {
			dist = sqrt(
				pow((agent[i].z - agent[me].z), 2) +
				pow(dist, 2)
			);
		}

//		dist = abs(agent[i].x - agent[me].x);              // square shortcut
//		if (dist > abs(agent[i].y - agent[me].y)) {
//			dist = abs(agent[i].y - agent[me].y);}
//		if (anaglyph && (dist > abs(agent[i].z - agent[me].z))) {
//			dist = abs(agent[i].z - agent[me].z);}

		if (dist < minDist) {
			minDist = dist; nn = i;}
	}
	return nn;
}

void averageInRadius (int me) {    // square or cubic distance
	neighbors = 0;
	sumXdistancesFromMe = 0;
	sumYdistancesFromMe = 0;
	sumZdistancesFromMe = 0;
	sum_dH = 0;
	xDistanceFromMe = 0;
	yDistanceFromMe = 0;
	zDistanceFromMe = 0;
	for (int i = 0; i < pop; i++) {    // look at everyone else
		if (i == me) continue;         // but skip me
		xDistanceFromMe = abs(agent[i].x - agent[me].x);
		yDistanceFromMe = abs(agent[i].y - agent[me].y);
		zDistanceFromMe = abs(agent[i].z - agent[me].z);
		if ((xDistanceFromMe < radius) && (yDistanceFromMe < radius)
			&& (zDistanceFromMe < radius)) {
				neighbors++;
				sumXdistancesFromMe += agent[i].dx;
				sumYdistancesFromMe += agent[i].dy;
				sumZdistancesFromMe += agent[i].dz;
		}
	}
}

void step (void) {

		for (int i = 0; i < pop; i++) {

			// draw trails or not
			if (Form1->RadioGroupTrail->ItemIndex == 0) {
				agent[i].erase();
			}

			// adopt nearest neighbors direction and speed
			if (rule == 1) {
				agent[i].dx = agent[nneighbor(i)].dx;
				agent[i].dy = agent[nneighbor(i)].dy;
			}

			// adopt weighted average direction and speed of those
			// within a square radius           // always a cube!!!
			if (rule == 2) {
				averageInRadius(i);    // look around

				// add all x & y components
				weightedAveSumXdistances =
					(independence * agent[i].dx + sumXdistancesFromMe)
					/ (neighbors + independence);
				weightedAveSumYdistances =
					(independence * agent[i].dy + sumYdistancesFromMe)
					/ (neighbors + independence);
				weightedAveSumZdistances =
					(independence * agent[i].dz + sumZdistancesFromMe)
					/ (neighbors + independence);
				if (weightedAveSumXdistances == 0)
					weightedAveSumXdistances = .00001;
				if (weightedAveSumYdistances == 0)
					weightedAveSumYdistances = .00001;
				if (weightedAveSumZdistances == 0)
					weightedAveSumZdistances = .00001;

				// compute noise
				directionVariance = 0.001 * ((random(variance + 1)) - 0.5 * variance);
				weightedAveDirection = atan2(weightedAveSumYdistances,
					weightedAveSumXdistances) + directionVariance;

				my_H = agent[i].velocity();
				weightedAveVelocity = (independence * my_H + sum_dH)
					/ (neighbors + independence);
				agent[i].dx = my_H * cos(weightedAveDirection);
				agent[i].dy = my_H * sin(weightedAveDirection);
				//agent[i].dz = my_H * sin(weightedAveDirection);
			}

			// flock to cursor (flee from cursor is less interesting)

			if (rule == 3) {

				sumXdistancesFromMe = cursorX - agent[i].x;
				sumYdistancesFromMe = cursorY - agent[i].y;
				sumZdistancesFromMe = cursorZ - agent[i].z;

				weightedAveSumXdistances =
					(independence * agent[i].dx + sumXdistancesFromMe)
					/ (independence);
				weightedAveSumYdistances =
					(independence * agent[i].dy + sumYdistancesFromMe)
					/ (independence);
				weightedAveSumZdistances =
					(independence * agent[i].dz + sumZdistancesFromMe)
					/ (independence);
				if (weightedAveSumXdistances == 0)
					weightedAveSumXdistances = .00001;
				if (weightedAveSumYdistances == 0)
					weightedAveSumYdistances = .00001;
				if (weightedAveSumZdistances == 0)
					weightedAveSumZdistances = .00001;

				// compute noise
				directionVariance = 0.001 * ((random(variance + 1)) - 0.5 * variance);
				weightedAveDirection = atan2(weightedAveSumYdistances,
					weightedAveSumXdistances) + directionVariance;
				my_H = agent[i].velocity();
				weightedAveVelocity = (independence * my_H + sum_dH)
					/ (neighbors + independence);
				agent[i].dx = my_H * cos(weightedAveDirection);
				agent[i].dy = my_H * sin(weightedAveDirection);
			}

			// flee from cursor
			if (rule == 4) {

				sumXdistancesFromMe =  agent[i].x - cursorX;
				sumYdistancesFromMe =  agent[i].y - cursorY;

				weightedAveSumXdistances =
					(independence * agent[i].dx + sumXdistancesFromMe)
					/ (independence);
				weightedAveSumYdistances =
					(independence * agent[i].dy + sumYdistancesFromMe)
					/ (independence);
				if (weightedAveSumXdistances == 0)
					weightedAveSumXdistances = .00001;
				if (weightedAveSumYdistances == 0)
					weightedAveSumYdistances = .00001;

				// compute noise
				directionVariance = 0.001 * ((random(variance + 1)) - 0.5 * variance);
				weightedAveDirection = atan2(weightedAveSumYdistances,
					weightedAveSumXdistances) + directionVariance;
				my_H = agent[i].velocity();
				weightedAveVelocity = (independence * my_H + sum_dH)
					/ (neighbors + independence);
				agent[i].dx = my_H * cos(weightedAveDirection);
				agent[i].dy = my_H * sin(weightedAveDirection);
			}

			// assimilate
			if (rule == 5) {
				// agent[i].dx = agent[nneighbor(i)].dx;
				// agent[i].dy = agent[nneighbor(i)].dy;
				if (agent[i].color == clAqua) agent[nneighbor(i)].color = clAqua;
				if (agent[i].color == clFuchsia) agent[nneighbor(i)].color = clFuchsia;
				if (agent[i].color == clYellow) agent[nneighbor(i)].color = clYellow;
				if (agent[i].color == clWhite) agent[nneighbor(i)].color = clWhite;
			}

			// seek random other
			if (rule == 6) {
				sumXdistancesFromMe = agent[agent[i].seeking].x - agent[i].x;
				sumYdistancesFromMe = agent[agent[i].seeking].y - agent[i].y;
				sumZdistancesFromMe = agent[agent[i].seeking].z - agent[i].z;

				weightedAveSumXdistances =
					(independence * agent[i].dx + sumXdistancesFromMe)
					/ (independence);
				weightedAveSumYdistances =
					(independence * agent[i].dy + sumYdistancesFromMe)
					/ (independence);
				weightedAveSumZdistances =
					(independence * agent[i].dz + sumZdistancesFromMe)
					/ (independence);
				if (weightedAveSumXdistances == 0)
					weightedAveSumXdistances = .00001;
				if (weightedAveSumYdistances == 0)
					weightedAveSumYdistances = .00001;
				if (weightedAveSumZdistances == 0)
					weightedAveSumZdistances = .00001;

				// compute noise
				directionVariance = 0.001 * ((random(variance + 1)) - 0.5 * variance);
				weightedAveDirection = atan2(weightedAveSumYdistances,
					weightedAveSumXdistances) + directionVariance;
				my_H = agent[i].velocity();
				weightedAveVelocity = (independence * my_H + sum_dH)
					/ (neighbors + independence);
				agent[i].dx = my_H * cos(weightedAveDirection);
				agent[i].dy = my_H * sin(weightedAveDirection);
			}

			// follow in line, seek in order
			if (rule == 7) {
				sumXdistancesFromMe = agent[mv(i+1)].x - agent[i].x;
				sumYdistancesFromMe = agent[mv(i+1)].y - agent[i].y;
				sumZdistancesFromMe = agent[mv(i+1)].z - agent[i].z;

				weightedAveSumXdistances =
					(independence * agent[i].dx + sumXdistancesFromMe)
					/ (independence);
				weightedAveSumYdistances =
					(independence * agent[i].dy + sumYdistancesFromMe)
					/ (independence);
				weightedAveSumZdistances =
					(independence * agent[i].dz + sumZdistancesFromMe)
					/ (independence);
				if (weightedAveSumXdistances == 0)
					weightedAveSumXdistances = .00001;
				if (weightedAveSumYdistances == 0)
					weightedAveSumYdistances = .00001;
				if (weightedAveSumZdistances == 0)
					weightedAveSumZdistances = .00001;

				// compute noise
				directionVariance = 0.001 * ((random(variance + 1)) - 0.5 * variance);
				weightedAveDirection = atan2(weightedAveSumYdistances,
					weightedAveSumXdistances) + directionVariance;
				my_H = agent[i].velocity();
				weightedAveVelocity = (independence * my_H + sum_dH)
					/ (neighbors + independence);
				agent[i].dx = my_H * cos(weightedAveDirection);
				agent[i].dy = my_H * sin(weightedAveDirection);
			}

			agent[i].move();
		}
		Sleep(delay);
}

void refresh (void) {
	Form1->PaintBox1->Refresh();
	for (int i = 0; i < pop; i++) {
		agent[i].draw();
	}
}

void run (void) {
	stop = false;
	Form1->EditStart->Text = Time();
	while (stop == false) {
		Application->ProcessMessages();

		// get depth for 3d
		if (anaglyph) depth = Form1->TrackBarDepth->Position;
		iterations++;
		step();

	}
}

// ==========================================================================
// =========================================================== EVENT HANDLERS
// ==========================================================================

//---------------------------------------------------------- FORM CONSTRUCTOR
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{
	DoubleBuffered = true;
	// MakeFullyVisible();
	// See also Screen->Height, Width
	// See also Monitor->Height, Width

	monitorHeight = Monitor->Height;
	Form1->Height = monitorHeight;
	Form1->PaintBox1->Height = monitorHeight;

	monitorWidth = Monitor->Width;
	Form1->Width = monitorWidth;
	Form1->PaintBox1->Width = monitorWidth;

	randomize();
	initialize();
	Form1->PaintBox1->Canvas->Pen->Width = 1;
}

//----------------------------------------------------------------- SHOW FORM
void __fastcall TForm1::FormShow(TObject *Sender)
{
	refresh();
}

//------------------------------------------------------------- ACTIVATE FORM
void __fastcall TForm1::FormActivate(TObject *Sender)
{
	refresh();
}

//---------------------------------------------------------------- RUN BUTTON
void __fastcall TForm1::ButtonRunClick(TObject *Sender)
{
	run();
}

//--------------------------------------------------------------- STEP BUTTON
void __fastcall TForm1::ButtonStepClick(TObject *Sender)
{
	stop = true;
	step();
}

//--------------------------------------------------------------- STOP BUTTON
void __fastcall TForm1::ButtonStopClick(TObject *Sender)
{
	stop = true;
}

//-------------------------------------------------------------- RESET BUTTON
void __fastcall TForm1::ButtonResetClick(TObject *Sender)
{
	reset();
	Form1->Refresh();
}

//-------------------------------------------------------------  CLOSE BUTTON
void __fastcall TForm1::ButtonCloseClick(TObject *Sender)
{
	Form1->Close();
}

//------------------------------------------------------------- SHRINK BUTTON
void __fastcall TForm1::ButtonShrinkClick(TObject *Sender)
{
	for (int i = 0; i < pop; i++) {
		agent[i].shrink();
	}
}

//--------------------------------------------------------------- GROW BUTTON
void __fastcall TForm1::ButtonGrowClick(TObject *Sender)
{
	for (int i = 0; i < pop; i++) {
		agent[i].grow();
	}
}

//--------------------------------------------------------- TRAIL RADIO GROUP
void __fastcall TForm1::RadioGroupTrailClick(TObject *Sender)
{
	Form1->Refresh();	
}

//---------------------------------------------------------------------------
void __fastcall TForm1::PaintBox1MouseDown(TObject *Sender, TMouseButton Button,
      TShiftState Shift, int X, int Y)
{
	if (Button == 0) {              // set, unset, cursor X and Y
		fixCursorXY = !fixCursorXY; // clicks alternate between fixed & moving
		if (fixCursorXY == true) {
			cursorX = X;
			cursorY = Y;
			cursorZ = monitorHeight / 2;
		}
	}

	// Button 1 is reserved for the Popup Menu

	if (Button == 2) {                 // allow user to color an agent
		// a chosen agent is the nearest agent no farther away from its radius
		int shortestDistance = 1000;

		for (i = 0; i < pop; i++) {
			int distance = abs(X - agent[i].x) + abs(Y - agent[i].y);
			if (distance < shortestDistance) {
				shortestDistance = distance;
				chosen = i;
			}
		}
		if( shortestDistance < agent[chosen].width / 2)  {
			agent[chosen].color = userColor;
			agent[chosen].draw();
		}
	}
}

//---------------------------------------------------------------------------
void __fastcall TForm1::PaintBox1MouseMove(TObject *Sender, TShiftState Shift,
	  int X, int Y)
{
	if (fixCursorXY == false) {
		cursorX = X;            // useful for some rules
		cursorY = Y;
	}
}

//---------------------------------------------------------------------------
void __fastcall TForm1::ButtonSelectColorClick(TObject *Sender)
{
	if(Form1->ColorDialog1->Execute()) {
		userColor = ColorDialog1->Color;
		Form1->ShapeColor->Brush->Color = userColor;
	}
}

//---------------------------------------------------------------------------
void __fastcall TForm1::TrackBarSpeedChange(TObject *Sender)
{
	delay = TrackBarSpeed->Max - TrackBarSpeed->Position;
}

//---------------------------------------------------------------------------
void __fastcall TForm1::TrackBarPopulationChange(TObject *Sender)
{
	lastPop = pop;  // remember previous population
	pop = TrackBarPopulation->Position;
	Form1->EditPop->Text = pop;
	if (pop < lastPop)   // if new pop smaller, erase excess agents
		Form1->PaintBox1->Refresh();
	reset();
}

//---------------------------------------------------------------------------
void __fastcall TForm1::RadioGroupRulesClick(TObject *Sender)
{
	rule = RadioGroupRules->ItemIndex;
	for (int i = 0; i < pop; i++) {
		if (rule == 5) {
			if (i % 4 == 0) agent[i].color = clAqua;
			if (i % 4 == 1) agent[i].color = clFuchsia;
			if (i % 4 == 2) agent[i].color = clYellow;
			if (i % 4 == 3) agent[i].color = clWhite;
		}
		else agent[i].color = clWhite;
	}
}

//---------------------------------------------------------------------------
void __fastcall TForm1::TrackBarRadiusChange(TObject *Sender)
{
	radius = TrackBarRadius->Position;
	Form1->EditRadius->Text = radius;

	Form1->ShapeRed->Height = radius;
	Form1->ShapeRed->Width = radius;
	Form1->ShapeRed->Left = (850 + (monitorHeight / 2 + radius) / depth);
	Form1->ShapeCyan->Left = (850 + (monitorHeight / 2 - radius) / depth);
	//(monitorHeight / 2 - z) / depth
	Form1->ShapeCyan->Height = radius;
	Form1->ShapeCyan->Width = radius;
	step();
}

//---------------------------------------------------------------------------
void __fastcall TForm1::TrackBarIndependenceChange(TObject *Sender)
{
	independence = TrackBarIndependence->Position;
	Form1->EditStubbornness->Text = independence;
}

//---------------------------------------------------------------------------
void __fastcall TForm1::TrackBarVarianceChange(TObject *Sender)
{
	variance = TrackBarVariance->Position;
	Form1->EditVariance->Text = variance;
}

//---------------------------------------------- ON / OFF RADIO GROUP TIMERS
void __fastcall TForm1::RadioGroupTimersClick(TObject *Sender)
{
	timers = !timers;
	cursorX = random(monitorWidth - 10);
	cursorY = random(monitorHeight - 10);
	if (timers == true) {
		Form1->TimerColor->Enabled = true;
		Form1->TimerRules->Enabled = true;
		Form1->TimerRadius->Enabled = true;
		Form1->TimerIndependence->Enabled = true;
		Form1->TimerVariance->Enabled = true;
		Form1->TimerReset->Enabled = true;
		Form1->TimerTrails->Enabled = true;
		Form1->TimerCursor->Enabled = true;
		Form1->TimerPopulation->Enabled = true;
		Form1->TimerOneSecond->Enabled = true;
	}
	else {
		Form1->TimerColor->Enabled = false;
		Form1->TimerRules->Enabled = false;
		Form1->TimerRadius->Enabled = false;
		Form1->TimerIndependence->Enabled = false;
		Form1->TimerVariance->Enabled = false;
		Form1->TimerReset->Enabled = false;
		Form1->TimerTrails->Enabled = false;
		Form1->TimerCursor->Enabled = false;
		Form1->TimerPopulation->Enabled = false;
		Form1->TimerOneSecond->Enabled = false;
	}
}

//--------------------------------------------------------------- COLOR TIMER
void __fastcall TForm1::TimerColorTimer(TObject *Sender)
{
	Form1->RadioGroupColor->ItemIndex = random(3) + 1;
}

//--------------------------------------------------------------- RULES TIMER
void __fastcall TForm1::TimerRulesTimer(TObject *Sender)
{
	Form1->RadioGroupRules->ItemIndex = random(3) + 1;
}

//-------------------------------------------------------------- RADIUS TIMER
void __fastcall TForm1::TimerRadiusTimer(TObject *Sender)
{
	Form1->TrackBarRadius->Position = random(100);
}

//-------------------------------------------------------- INDEPENDENCE TIMER
void __fastcall TForm1::TimerIndependenceTimer(TObject *Sender)
{
	Form1->TrackBarIndependence->Position = random(2000) + 1;
}

//------------------------------------------------------------ VARIANCE TIMER
void __fastcall TForm1::TimerVarianceTimer(TObject *Sender)
{
	Form1->TrackBarVariance->Position = random(200);
}

//--------------------------------------------------------------- RESET TIMER
void __fastcall TForm1::TimerResetTimer(TObject *Sender)
{
	reset();
}

//------------------------------------------------------------- TRAILS TIMER
void __fastcall TForm1::TimerTrailsTimer(TObject *Sender)
{
	Form1->RadioGroupTrail->ItemIndex = random(3);
}

//------------------------------------------------------------- CURSOR TIMER
void __fastcall TForm1::TimerCursorTimer(TObject *Sender)
{
	cursorX = random(monitorWidth - 20) + 10;
	cursorY = random(monitorHeight - 20) + 10;
}

//--------------------------------------------------------- POPULATION TIMER
void __fastcall TForm1::TimerPopulationTimer(TObject *Sender)
{
	Form1->TrackBarPopulation->Position = 100 + random(800);
	// Access Violation if pop < 100
}

//--------------------------------------------------------- ONE SECOND TIMER
void __fastcall TForm1::TimerOneSecondTimer(TObject *Sender)
{
	Form1->EditEnd->Text = Time();
}

//---------------------------------------------------------------------------



//----------------------------------------------------------- EXIT POPUP MENU
void __fastcall TForm1::Exit1Click(TObject *Sender)
{
	run();
}

//----------------------------------------------------------- EXIT POPUP MENU
void __fastcall TForm1::Run1Click(TObject *Sender)
{
	stop = true;
	step();
}

//----------------------------------------------------------- EXIT POPUP MENU
void __fastcall TForm1::Step1Click(TObject *Sender)
{
	stop = true;
}

//----------------------------------------------------------- EXIT POPUP MENU
void __fastcall TForm1::Exit2Click(TObject *Sender)
{
	Form1->Close();
}

//----------------------------------------------------------- EXIT POPUP MENU
void __fastcall TForm1::Visible1Click(TObject *Sender)
{
	Form1->GroupBoxControls->Visible = true;
}

//----------------------------------------------------------- EXIT POPUP MENU
void __fastcall TForm1::Hidden1Click(TObject *Sender)
{
	Form1->GroupBoxControls->Visible = false;
}

//---------------------------------------------------------------------------

void __fastcall TForm1::RadioGroupColorClick(TObject *Sender)
{
	for (int i = 0; i < pop; i++) {
		agent[i].erase();
	}
	if (RadioGroupColor->ItemIndex == 4) anaglyph = true;
	else anaglyph = false;
}
//---------------------------------------------------------------------------


void __fastcall TForm1::TrackBarDepthChange(TObject *Sender)
{
	depth = TrackBarDepth->Position;

	Form1->ShapeRed->Height = radius;
	Form1->ShapeRed->Width = radius;
	Form1->ShapeRed->Left = (850 + (monitorHeight / 2 + radius) / depth);
	Form1->ShapeCyan->Left = (850 + (monitorHeight / 2 - radius) / depth);
	//(monitorHeight / 2 - z) / depth
	Form1->ShapeCyan->Height = radius;
	Form1->ShapeCyan->Width = radius;
	step();

}
//---------------------------------------------------------------------------

void __fastcall TForm1::RadioGroupPenWidthClick(TObject *Sender)
{
	if (RadioGroupPenWidth->ItemIndex == 0)
		Form1->PaintBox1->Canvas->Pen->Width = 1;
	if (RadioGroupPenWidth->ItemIndex == 1)
		Form1->PaintBox1->Canvas->Pen->Width = 2;
	if (RadioGroupPenWidth->ItemIndex == 2)
		Form1->PaintBox1->Canvas->Pen->Width = 3;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::ButtonEqualizeSpeedClick(TObject *Sender)
{
	for (int i = 0; i < POP; i++) {
		agent[i].dy = double(random(10) - 5) / 2.00;    // -2 to +2
		agent[i].dx = double(random(10) - 5) / 2.00;    // -2 to +2
		agent[i].dz = double(random(10) - 5) / 2.00;    // -2 to +2
    }
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Reset1Click(TObject *Sender)
{
	reset();
	Form1->Refresh();
}
//---------------------------------------------------------------------------

void __fastcall TForm1::ClearScreen1Click(TObject *Sender)
{
	Form1->Refresh();
}
//---------------------------------------------------------------------------