Need help.. (Arraylist, PVector) getting the distance between vertices from Arraylist and vertex of sphere

anak_itik

Need help.. (Arraylist, PVector) getting the distance between vertices from Arraylist and vertex of sphere

in Contributed Library Questions • 1 month ago

Hi there,

I want to get the distance between vertices from Arraylist and vertex of a sphere. So there will be multiple distance value to the sphere. I've tried some of the tips from this forum but i didn't get the correct distance value.

In my codes, I'm trying to get the distance between "b0.p"(which is an arraylist of vertices from Bone class) and "pos"(variable that holds the "s0.getPosition()", which is the vertex of the sphere). The reason I'm trying to get the distance is because I want to set a rule to change the color of the sphere should the distance between "b0.p" and "pos" is equal or less than the sphere radius ("s0.sR" is the variable for the sphere radius).

here are the obj file and mtl file accompanying it

OBJ file

mtl file for the obj file

here are the codes

**the bold lines are the one i'm stuck and got confused

**the long dash seperates the classes code

import remixlab.proscene.*;
import saito.objloader.*;
import java.util.HashMap;
Scene scene;
ArrayList bones;
ArrayList stems;
Button2D button1, button2;
int myColor;
Bone b0;
Stem s0;
float d;
float e;
void setup() {
size(800, 600, P3D);
scene = new Scene(this);
scene.setShortcut('f', Scene.KeyboardAction.DRAW_FRAME_SELECTION_HINT);
button1 = new ClickButton(scene, new PVector(10,10), "+", 32, true, true);
button2 = new ClickButton(scene, new PVector((10 + button1.myWidth + 5), 10), "-", 32, false, false);
scene.setGridIsDrawn(true);
scene.setCameraType(Camera.Type.ORTHOGRAPHIC);
scene.setRadius(150);
scene.showAll();
b0 = new Bone(this, "femur.model");
s0 = new Stem();
myColor = 125;
bones = new ArrayList();
addBone();
myColor = 130;
stems = new ArrayList();
addStem();
}
void draw() {
background(0);
lights();
button1.display();
button2.display();
//get cood of objfile vertices
b0.cood();
// println(b0.p);
//get the radius of sphere ftom Stem class
s0.sphereRadius();
// println(s0.sR);
//get the vertex of sphere from Stem class
PVector pos = s0.getPosition();
// println(pos);
for (int i = 0; i < bones.size(); i++) {
Bone b0 = (Bone) bones.get(i);
b0.draw(true);
}
for (int j = 0; j <stems.size(); j++) {
Stem s0 = (Stem) stems.get(j);
s0.draw(true);
}
}
void addBone() {
b0 = new Bone(this, "femur.model");
bones.add(b0);
}
void removeBone() {
if(bones.size()>0) {
scene.removeFromMouseGrabberPool(((Bone)bones.get(0)).iFrame);
bones.remove(0);
}
}
void addStem() {
s0 = new Stem();
stems.add(s0);
}
void removeStem() {
if(stems.size()>0) {
scene.removeFromMouseGrabberPool(((Stem)stems.get(0)).iFrame);
stems.remove(0);
}
}
--------------------------------------------------------------
public class Bone {
InteractiveFrame iFrame;
float w, h, d;
int c;
float px, py, pz;
float rx, ry, rz;
int col;
Object femur;
ArrayList <PVector> p;
Bone(PApplet _applet, String model_name) {
iFrame = new InteractiveFrame(scene);
setSize();
setColor();
setPosition();
col = color(255);
femur = new Object(_applet, "Femurtest2.obj");
// femur.model.scale(500);
}
public void draw() {
draw(false);
}
public void draw(boolean drawAxis) {
pushMatrix();
pushStyle();
iFrame.applyTransformation(); //optimum
if(drawAxis) scene.drawAxis(max(w,h,d)*1.3f);
noStroke();
if (iFrame.grabsMouse()){
fill(255, 0, 0);
}
else {
fill(getColor());
}
femur.model.draw();
popMatrix();
}
public void cood(){
p = new ArrayList <PVector> ();
p = femur.list;
}
// sets size randomly
public void setSize() {
w = random(10, 40);
h = random(10, 40);
d = random(10, 40);
}
public void setSize(float myW, float myH, float myD) {
w=myW; h=myH; d=myD;
}
public int getColor() {
return c;
}
// sets color randomly
public void setColor() {
c = color(random(0, 255), random(0, 255), random(0, 255));
}
public void setColor(int myC) {
c = myC;
}
public PVector getPosition() {
return iFrame.position();
}
// sets position randomly
public void setPosition() {
float low = -100;
float high = 100;
iFrame.setPosition(new PVector(random(low, high), random(low, high), random(low, high)));
}
public void setPosition(PVector pos) {
iFrame.setPosition(pos);
}
public Quaternion getOrientation() {
return iFrame.orientation();
}
public void setOrientation(PVector v) {
PVector to = PVector.sub(v, iFrame.position());
iFrame.setOrientation(new Quaternion(new PVector(0,1,0), to));
}
}
------------------------------------------------------------
public class Button2D extends MouseGrabber {
String myText;
PFont myFont;
int myWidth;
int myHeight;
PVector position;
Button2D(Scene scn, PVector p, int fontSize) {
this(scn, p, "", fontSize);
}
Button2D(Scene scn, PVector p, String t, int fontSize) {
super(scn);
position = p;
myText = t;
myFont = createFont("FFScala", fontSize);
textFont(myFont);
textMode(SCREEN);
textAlign(CENTER);
setText(t);
}
void setText(String text) {
myText = text;
myWidth = (int) textWidth(myText);
myHeight = (int) (textAscent() + textDescent());
}
void display() {
pushStyle();
if(grabsMouse())
fill(255);
else
fill(100);
text(myText, position.x, position.y, myWidth, myHeight);
popStyle();
}
void checkIfGrabsMouse(int x, int y, Camera camera) {
// Rectangular activation area
setGrabsMouse( (position.x <= x ) && ( x <= position.x + myWidth ) && (position.y <= y ) && ( y <= position.y + myHeight ) );
}
}
----------------------------------------------------------------
public class ClickButton extends Button2D {
boolean addBone;
boolean addStem;
public ClickButton(Scene scn, PVector p, String t, int fontSize, boolean addB, boolean addS) {
super(scn, p, t, fontSize);
addBone = addB;
addStem = addS;
}
void mouseClicked(Scene.Button button, int numberOfClicks, Camera camera) {
if(numberOfClicks == 1) {
if(addBone)
addBone();
else
removeBone();
if(addStem)
addStem();
else
removeStem();
}
}
}
----------------------------------------
public class Stem {
InteractiveFrame iFrame;
float w, h, d;
int c;
float px, py, pz;
float rx, ry, rz;
int col;
int sphereRadius = 10;
int sR;
Stem() {
iFrame = new InteractiveFrame(scene);
setSize();
setColor();
setPosition();
col = color(255);
}
public void draw() {
draw(false);
}
public void draw(boolean drawAxis) {
pushMatrix();
pushStyle();
iFrame.applyTransformation(); //optimum
if(drawAxis) scene.drawAxis(max(w,h,d)*1.3f);
noStroke();
if (iFrame.grabsMouse()){
fill(255, 0, 0);
}
else {
fill(getColor());
}
sphere(sphereRadius);
popMatrix();
}
public void hitColor(){
col = color(0, 255,0);
}
public void sphereRadius(){
sR = sphereRadius;
}
// sets size randomly
public void setSize() {
w = random(10, 40);
h = random(10, 40);
d = random(10, 40);
}
public void setSize(float myW, float myH, float myD) {
w=myW; h=myH; d=myD;
}
public int getColor() {
return c;
}
// sets color randomly
public void setColor() {
c = color(0, 0, 255);
}
public void setColor(int myC) {
c = myC;
}
public PVector getPosition() {
return iFrame.position();
}
// sets position randomly
public void setPosition() {
float low = -100;
float high = 100;
iFrame.setPosition(new PVector(random(low, high), random(low, high), random(low, high)));
}
public void setPosition(PVector pos) {
iFrame.setPosition(pos);
}
public Quaternion getOrientation() {
return iFrame.orientation();
}
public void setOrientation(PVector v) {
PVector to = PVector.sub(v, iFrame.position());
iFrame.setOrientation(new Quaternion(new PVector(0,1,0), to));
}
}
----------------------------------------------
import saito.objloader.*;
// A wrapper for a the OBJModel object
class Object
{
OBJModel model;
ArrayList <PVector> list;
Object(PApplet _applet, String model_name)
{
model = new OBJModel(_applet, model_name, "relative", POLYGON);
model.enableDebug();
model.translateToCenter();
// model.disableMaterial();
model.scale(500);
list = new ArrayList <PVector> ();
for (int i=0; i<model.getVertexCount(); i++) {
list.add(model.getVertex(i));
}
}
}

Replies(3)

amnon.owed

Re: Need help.. (Arraylist, PVector) getting the distance between vertices from Arraylist and vertex of sphere

1 month ago

Your code does not handle data very neatly. But something like this...

boolean withinRange() {
for (PVector p : b0.p) {
// println( p.dist(pos) );
if ( p.dist(pos) < s0.sR ) {
return true;
}
}
return false;
}

anak_itik

Re: Need help.. (Arraylist, PVector) getting the distance between vertices from Arraylist and vertex of sphere

1 month ago

thank you for the help.. i'm a newbie in this.. could you help me on how to make my code handle the data properly?

amnon.owed

Re: Need help.. (Arraylist, PVector) getting the distance between vertices from Arraylist and vertex of sphere

1 month ago

I suppose a good way to learn is by looking at some of the more elaborate examples that come with Processing and on OpenProcessing. Then you can see how these examples handle things. Many of them use a similar coding style that features separating methods/data in relevant classes. For example: File > Examples > Books > Nature of Code (regardless of the content of the examples, you can see all of them have a very clear and readable coding style that makes them much easier to understand and change).

Top Reply