commit a747c84af891489131874af2d15f74dd8b56ceea
Author: lapin <serprev.z@gmail.com>
Date:   Fri Oct 9 17:18:04 2020 +0200

    one particle with prevous path but bugged

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2ddc9cf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+# java binary
+application.linux-arm64/
+application.linux-armv6hf/
+application.linux32/
+application.linux64/
+
+#vim temporaty file
+.*.sw*
+
+#procesing autosave
+*.autosave
diff --git a/LaserOut.pde b/LaserOut.pde
new file mode 100644
index 0000000..13e9902
--- /dev/null
+++ b/LaserOut.pde
@@ -0,0 +1,74 @@
+
+public	void	processing_draw_line(Point[] line)
+{
+	int	i;
+	Point	p1, p2;
+
+	for (i = 0; i < line.length - 1; i++)
+	{
+		p1 = line[i];
+		p2 = line[i + 1];
+
+//		println("  print seg:", p1.x, p1.y, p2.x, p2.y);
+		stroke(p1.r, p1.g, p1.b);
+		line(p1.x, p1.y, p2.x, p2.y);
+	}
+}
+
+public	class	LaserOut
+{
+	String	laser_out;
+	boolean	is_empty;
+	boolean	is_printing;
+
+	LaserOut(boolean printing)
+	{
+		laser_out = new String();
+		laser_out += "[";
+		is_empty = true;
+		is_printing = printing;
+	}
+
+	LaserOut()
+	{
+		laser_out = new String();
+		laser_out += "[";
+		is_empty = true;
+		is_printing = true;
+	}
+
+	void	print_frame()
+	{
+		// to terminate json array
+		laser_out += "]";
+		if (is_printing)
+			println(laser_out);
+
+		// flush the string, prepar for next frame
+		laser_out = "";
+		laser_out += "[";
+		is_empty = true;
+	}
+	
+	void	add_line(Point[] line)
+	{
+		if (is_empty)
+			is_empty = false;
+		else
+		{
+			laser_out += ", ";
+		}
+
+		// on met un point noir quoi qu'il arrive
+		laser_out +=  "[" + str(line[0].x) + ", " + str(line[0].y) + ", 0]";
+		for (int i = 0; i < line.length; i++)
+		{
+			laser_out += ", [" + str(line[i].x) + ", " + str(line[i].y) + ", " + str(line[i].col) + "]";
+		}
+		laser_out +=  ", [" + str(line[line.length - 1].x) + ", " + str(line[line.length - 1].y) + ", 0]";
+
+		processing_draw_line(line); // On pourait rajouter une condition si un paraetre est activer
+	}
+}
+
+
diff --git a/Point.pde b/Point.pde
new file mode 100644
index 0000000..7fbfe39
--- /dev/null
+++ b/Point.pde
@@ -0,0 +1,32 @@
+public	class	Point
+{
+	public	int	x;
+	public	int	y;
+
+	public	int	r;
+	public	int	g;
+	public	int	b;
+
+	public	int col;
+
+
+	Point(int in_x, int in_y, int c)
+	{
+		x = in_x;
+		y = in_y;
+		r = (c >> 16) & 0xFF;
+		g = (c >>  8) & 0xFF;
+		b = (c >>  0) & 0xFF;
+		col = c;
+	}
+
+	Point(int in_x, int in_y, int col_r, int col_g, int col_b)
+	{
+		x = in_x;
+		y = in_y;
+		r = col_r & 0xFF;
+		g = col_g & 0xFF;
+		b = col_b & 0xFF;
+		col = (r & 0xFF) << 16| ((g & 0xFF) << 8) | ((b & 0xFF));
+	}
+}
diff --git a/atractor.pde b/atractor.pde
new file mode 100644
index 0000000..526b087
--- /dev/null
+++ b/atractor.pde
@@ -0,0 +1,45 @@
+// il y aura 10 attractor, plus on ne fera pas
+	
+public	class	Attractor
+{
+	PVector		pos;
+	float		weight;
+	boolean		is_active;	
+
+	float		circle_radius;
+	int			col;
+	int			circle_pt;
+
+	Attractor(){
+		pos = new PVector(0, 0, 0);
+		is_active = false;
+		weight = 30;
+
+		circle_radius = 20;
+		col = getColInt(0, 0, 50);
+		circle_pt = 10;
+	}
+
+	void	draw(){
+		if (is_active){
+			if (att_stdout)
+				laser_frame.add_line(create_circle(pos.x, pos.y, circle_radius, circle_pt, col));
+			else
+				processing_draw_line(create_circle(pos.x, pos.y, circle_radius, circle_pt, col));
+		}
+	}
+
+	// we need to remap position from the leap motion
+	void	update_pos(PVector p){
+		pos.x = ( p.x - 0) * 1;
+		pos.y = (70. - p.z) * (800.0 / 70.0);
+		is_active = true;
+	}
+
+
+
+//	void	update_position(float px, float py){
+//		pos.x = px;
+//		pos.y = py;
+//	}
+}
diff --git a/mini_leap.pde b/mini_leap.pde
new file mode 100644
index 0000000..73b1100
--- /dev/null
+++ b/mini_leap.pde
@@ -0,0 +1,117 @@
+import de.voidplus.leapmotion.*;
+
+// ======================================================
+// Table of Contents:
+// ├─ 1. Callbacks
+// ├─ 2. Hand
+// ├─ 3. Arms
+// ├─ 4. Fingers
+// ├─ 5. Bones
+// ├─ 6. Tools
+// └─ 7. Devices
+// ======================================================
+
+
+LeapMotion leap;
+LaserOut	laser_frame;
+int			hand_id;
+Attractor[]	attractors = new Attractor[10];
+Particle[] particles = new Particle[1];
+
+PVector min_pos;
+PVector max_pos;
+
+boolean	att_stdout;
+
+void setup() {
+	size(800, 500);
+	background(0);
+	// ...
+
+	leap = new LeapMotion(this);
+
+	att_stdout = false;
+	boolean print_stdout = false;
+	laser_frame = new LaserOut(print_stdout);
+
+	// init_attractors	
+	for (int i = 0; i < attractors.length; i++){
+		attractors[i] = new Attractor();
+	}
+	for (int i = 0; i < particles.length; i++){
+		particles[i] = new Particle(200); // number of previous position drawn
+
+	}
+}
+
+void	disable_attractors(){
+	for (Attractor att : attractors){
+		att.is_active = false;
+	}
+}
+
+void	draw_attractors(){
+	for (Attractor att : attractors){
+		if (att.is_active)
+			att.draw();
+	}
+}
+
+void	draw_particles(){	
+	for (Particle p : particles){
+		p.draw();
+	}
+}
+
+void	particles_update_position(){
+	for (Particle p : particles){
+		p.update_position(attractors);
+	}
+}
+
+void draw() {
+	background(50);
+	// ...
+
+	int fps = leap.getFrameRate();
+	int i = 0;
+	int	att_id;
+
+	for (Hand hand : leap.getHands ()) {
+		if (i >= 2)
+		{
+			println("\n\n\n\t\t !! MORE THAN 2 hands isn't implemented");
+			continue;
+		}
+
+		// --------------------------------------------------
+		// Drawing
+//		hand.draw();
+		
+		// update attractors position and draw
+		att_id = i * 5 + 0; // 5 => number of finger
+		PVector	pos  = hand.getIndexFinger().getPositionOfJointDip();
+		attractors[att_id].update_pos(pos);
+
+	i++;
+  }
+
+	particles_update_position();
+	draw_attractors();
+	draw_particles();	
+	laser_frame.print_frame(); // print frame on stdout
+}
+
+
+//		println("finger_pos:", pos);
+
+//	//	println("---");
+//		int j = 0;
+//		for (Finger finger : hand.getFingers()) {
+//	
+//			// update attractors position and draw
+//			att_id = i * 5 + j; // 5 => number of finger
+//			PVector	pos  = finger.getPosition();
+//			attractors[att_id].update_pos(pos);
+//			j++;
+//		}
diff --git a/particle.pde b/particle.pde
new file mode 100644
index 0000000..0869e39
--- /dev/null
+++ b/particle.pde
@@ -0,0 +1,97 @@
+class	Particle{
+	PVector		pos;
+	PVector		speed;
+	int			col;
+
+	int			circular_nb;
+	int			circular_id;		// the id in the circular buffer
+	PVector[]	circular_pos;
+	boolean		draw_previous;
+
+
+	// pour pouvoir faire les trainer il faudrait retenir les position precedente
+	// avoir un beffer tournant
+	// retenir l'index actuel
+
+
+	void	init_circular(int nb_previous, boolean previous_drawing){
+		draw_previous = previous_drawing;
+		circular_nb = nb_previous;
+		circular_id = 0;
+		circular_pos = new PVector[circular_nb];
+		for (int i = 0; i < circular_pos.length; i++){
+			circular_pos[i] = new PVector(pos.x, pos.y, 0);
+		}
+	}
+
+	void	init_particle(){
+		pos = new PVector(random(50, 750), random(50, 70));
+		speed = new PVector(0, 0, 0);
+		col = getColInt(255, 255, 255);
+
+	}
+
+	Particle(){
+		init_particle();
+		init_circular(1, false);
+	}
+
+	Particle(int nb_previous){
+		init_particle();
+		init_circular(nb_previous, true);
+	}
+
+	void	update_position(Attractor[] attractors){
+		for	(Attractor att : attractors){
+			if (!att.is_active)
+				continue;
+			PVector d = vecSub(att.pos, pos);
+			float	dist = sqrt(d.x * d.x + d.y * d.y);
+			float	factor = att.weight * 1.0 / (dist + 10);
+
+			normalize(d);
+
+			speed.x += d.x * factor;
+			speed.y += d.y * factor;
+
+			float	cross = cross_product(getNormalized(speed), d);
+			float	slow_distance = 0.2;
+			// limitation de l'eloignement
+			if (cross < 0){
+				speed.x *= 1.0 - (slow_distance * abs(cross));
+				speed.y *= 1.0 - (slow_distance * abs(cross));
+			}
+
+			pos.x += speed.x;
+			pos.y += speed.y;
+
+			circular_id = (circular_id + 1) % circular_pos.length;
+			circular_pos[circular_id].x = float(int(pos.x));
+			circular_pos[circular_id].y = float(int(pos.y));
+		}
+	}
+
+	void	draw(){
+		//println("hello im drowing:", pos);
+		if (draw_previous){
+			int		id;
+			Point[]	previous_pos = new Point[circular_pos.length];
+			for (int i = 0; i < circular_pos.length; i++){
+				id = (circular_id - i + circular_pos.length) % circular_pos.length;
+				previous_pos[i] = new Point(int(circular_pos[i].x), int(circular_pos[id].y), getColInt(0, 255, 0));
+			}
+			//println("plop");
+			laser_frame.add_line(previous_pos);
+		}
+		else
+			laser_frame.add_line(create_point(pos, getColInt(0, 255, 0)));
+	}
+}
+
+Point[]	create_point(PVector pos, int col){
+	Point[]	point = new Point[2];
+	
+	point[0] = new Point(int(pos.x), int(pos.y), col);
+	point[1] = new Point(int(pos.x+1), int(pos.y+1), col);
+	return point;
+}
diff --git a/utils.pde b/utils.pde
new file mode 100644
index 0000000..8813d2a
--- /dev/null
+++ b/utils.pde
@@ -0,0 +1,85 @@
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
+Point[] create_circle(float center_x, float center_y, float radius, int nb_point, int col){
+	Point[]	line = new Point[nb_point + 1];
+	float	px, py, factor;
+
+	for (int i = 0; i < line.length; i++){
+		factor = float(i) / float(line.length - 1);
+		px = center_x + radius * cos(factor * TWO_PI);
+		py = center_y + radius * sin(factor * TWO_PI);
+		line[i] = new Point(int(px), int(py), col);
+	}
+	return (line);	
+}
+
+int		getColInt(int r, int g, int b){
+	int	col;
+
+	col = ((r & 0xFF) << 16) | ((g & 0xFF) << 8) | ((b & 0xFF));
+	return (col);
+}
+
+public void showFields(Object o) {
+   Class<?> clazz = o.getClass();
+
+   println("private fileds");
+   for(Field field : clazz.getDeclaredFields()) {
+       //you can also use .toGenericString() instead of .getName(). This will
+       //give you the type information as well.
+
+       println("\t", field.getName());
+   }
+
+   System.out.println("inherited fileds");
+   for(Field field : clazz.getFields()) {
+       //you can also use .toGenericString() instead of .getName(). This will
+       //give you the type information as well.
+       println("\t", field.getName());
+   }
+}
+
+public void showMethodes(Object o) {
+   Class<?> clazz = o.getClass();
+
+   System.out.println("private methode");
+   for(Method method : clazz.getDeclaredMethods()) {
+       println("\t", method.getName());
+   }
+
+   System.out.println("private methode");
+   for(Method method : clazz.getMethods()) {
+       println("\t", method.getName());
+   }
+}
+
+PVector		vecSub(PVector a, PVector b){
+	PVector	diff = new PVector();
+
+	diff.x = a.x - b.x;
+	diff.y = a.y - b.y;
+	diff.z = a.z - b.z;
+	return diff;
+}
+
+void		normalize(PVector p){
+	float	norme;
+
+	norme = sqrt(p.x * p.x + p.y * p.y + p.z * p.z);
+	p.x /= norme;
+	p.y /= norme;
+	p.z /= norme;
+}
+
+PVector		getNormalized(PVector v){
+	PVector res = new PVector(v.x, v.y, v.z);
+	
+	normalize(res);
+	return (res);
+}
+
+
+float	cross_product(PVector a, PVector b){
+	return (a.x*b.x + a.y*b.y + a.z*b.z);
+}