intersection question

Programming Questions

bmcnamara..

in Programming Questions • 1 year ago

I'm trying to change the color of a box on screen when a circle at mousex and mousey passes over it. my code runs but doesn't work. can anyone see where I'm going wrong?

boolean isTouching = false;
int blobRad = 80;
color col;
sonicBlock[] sonicBlocks = new sonicBlock[0];
Blob blob = new Blob();
int count = 100;
int numSamples = 0;
int grab = -1;
float time =0.0;
void setup() {
size(900, 600);
smooth();
float x = 30;
while (x < width) {
float y = 30;
while (y < height) {
makeNewsonicBlock(x, y, 25);
y = y + 60;
}
x = x + 60;
}
}
void draw() {
background(74, 147, 177);
if (mousePressed == true) {
selectsonicBlock();
if (grab>=0) {
sonicBlocks[grab].mouseMove();
//sonicBlocks[grab].ring();
}
}
for (int i = 0; i < count; i = i+1) {
sonicBlocks[i].display();
sonicBlocks[i].drag(.90);
//sonicBlocks[i].changeColor();
}
time+=.02;
blob.display();
if (isTouching = true){
col = color(31,52,75);
}
else{
col = color(44,149,171);
}
}
void mousePressed() {
}
void mouseReleased() {
grab = -1;
}
void selectsonicBlock() {
for (int i = 0; i < sonicBlocks.length; i ++) {
if (dist(sonicBlocks[i].posX, sonicBlocks[i].posY, mouseX, mouseY) < sonicBlocks[i].rad/2 ) {
grab = sonicBlocks[i].ID;
}
}
}
void touching(){
for (int i = 0; i < sonicBlocks.length; i ++){
if (dist(sonicBlocks[i].posX, sonicBlocks[i].posY, mouseX, mouseY) < blobRad + sonicBlocks[i].rad){
isTouching = true;
}
}
}
void makeNewsonicBlock(float x, float y, float rad) {
sonicBlock newsonicBlock = new sonicBlock(sonicBlocks.length, x, y, rad);
sonicBlocks = (sonicBlock[]) append(sonicBlocks, newsonicBlock);
}
void keyPressed() {
if (key == CODED) {
if (keyCode == UP) {
blobRad += 10;
}
else if (keyCode == DOWN) {
blobRad -=10;
}
if (blobRad >= 400) {
blobRad = 20;
}
}
}
class sonicBlock {
float posX;
float posY;
float speedX;
float speedY;
float rad;
int ID;
float dis;
sonicBlock(int objID, float tempposX, float tempposY, float tempRad) {
ID = objID;
posX = tempposX;
posY = tempposY;
rad = tempRad;
//dingdong = minim.loadSnippet(fileName);
}
void display() {
noStroke();
fill(col);
rectMode(CENTER);
rect(posX, posY, rad, rad);
}
/*void changeColor(){
if (isTouching = true){
col = color(31,52,75);
}
else{
col = color(44,149,171);
}
}*/
}
class Blob {
//ellipseMode(CENTER);
Blob() {
}
void display() {
fill(31, 52, 75, 60);
ellipse(mouseX, mouseY, blobRad, blobRad);
}
}

Replies(6)

calsign

Re: intersection question

1 year ago

isTouching = true
that doesn't work, you're assigning it to be true! Instead, use:
isTouching == true

If there's anything more than that, I can't find out because I cannot run your code.

tfguy44

Re: intersection question

1 year ago

You never call touching()!

bmcnamara..

Re: intersection question

1 year ago

calsign, thanks for the quick response. i tried what you suggested, still doesn't work - here's all the code:

boolean isTouching = false;
int blobRad = 80;
color col;
sonicBlock[] sonicBlocks = new sonicBlock[0];
Blob blob = new Blob();
int count = 100;
int numSamples = 0;
int grab = -1;
float time =0.0;
void setup() {
size(900, 600);
smooth();
float x = 30;
while (x < width) {
float y = 30;
while (y < height) {
makeNewsonicBlock(x, y, 25);
y = y + 60;
}
x = x + 60;
}
}
void draw() {
background(74, 147, 177);
if (mousePressed == true) {
selectsonicBlock();
if (grab>=0) {
sonicBlocks[grab].mouseMove();
//sonicBlocks[grab].ring();
}
}
for (int i = 0; i < count; i = i+1) {
sonicBlocks[i].display();
sonicBlocks[i].drag(.90);
//sonicBlocks[i].changeColor();
}
time+=.02;
blob.display();
}
void mousePressed() {
}
void mouseReleased() {
grab = -1;
}
void selectsonicBlock() {
for (int i = 0; i < sonicBlocks.length; i ++) {
if (dist(sonicBlocks[i].posX, sonicBlocks[i].posY, mouseX, mouseY) < sonicBlocks[i].rad/2 ) {
grab = sonicBlocks[i].ID;
}
}
}
void touching(){
for (int i = 0; i < sonicBlocks.length; i ++){
if (dist(sonicBlocks[i].posX, sonicBlocks[i].posY, mouseX, mouseY) < blobRad + sonicBlocks[i].rad){
isTouching = true;
}
}
}
void makeNewsonicBlock(float x, float y, float rad) {
sonicBlock newsonicBlock = new sonicBlock(sonicBlocks.length, x, y, rad);
sonicBlocks = (sonicBlock[]) append(sonicBlocks, newsonicBlock);
}
void keyPressed() {
if (key == CODED) {
if (keyCode == UP) {
blobRad += 10;
}
else if (keyCode == DOWN) {
blobRad -=10;
}
if (blobRad >= 400) {
blobRad = 20;
}
}
}
class sonicBlock {
float posX;
float posY;
float speedX;
float speedY;
float rad;
int ID;
float dis;
sonicBlock(int objID, float tempposX, float tempposY, float tempRad) {
ID = objID;
posX = tempposX;
posY = tempposY;
rad = tempRad;
//dingdong = minim.loadSnippet(fileName);
}
void display() {
noStroke();
fill(col);
rectMode(CENTER);
rect(posX, posY, rad, rad);
changeColor();
}
void changeColor(){
if (isTouching == true){
col = color(31,52,75);
}
else{
col = color(44,149,171);
}
}
void mouseMove() {
posX = mouseX;
posY = mouseY;
speedX = mouseX-pmouseX;
speedY = mouseY-pmouseY;
}
void drag(float drag) {
if (abs(speedX)>0.01 || abs(speedY)>0.01 ) {
speedX *= drag;
speedY *= drag;
posX = posX +speedX;
posY = posY +speedY;
if (posY < 0) posY = height;
if (posY > height) posY = 0;
if (posX < 0) posX = width;
if (posX > width) posX = 0;
}
}
/*void ring() {
if (!dingdong.isPlaying()) {
dingdong.rewind();
dingdong.play();
}
}*/
}
class Blob {
//ellipseMode(CENTER);
Blob() {
}
void display() {
fill(31, 52, 75, 60);
ellipse(mouseX, mouseY, blobRad, blobRad);
}
}

calsign

Re: intersection question

1 year ago

As tfguy44 said, you never call touching().

bmcnamara..

thanks for helping out guys, here I've changed touching() to a boolean and called it inside a for loop in the draw method, but the boxes take the first color value and don't change when they intersect with the blob.

again, help is much appreciated.

boolean isTouching = false;
int blobRad = 80;
color col;
sonicBlock[] sonicBlocks = new sonicBlock[0];
Blob blob = new Blob();
int count = 100;
int numSamples = 0;
int grab = -1;
float time =0.0;
void setup() {
size(900, 600);
smooth();
float x = 30;
while (x < width) {
float y = 30;
while (y < height) {
makeNewsonicBlock(x, y, 25);
y = y + 60;
}
x = x + 60;
}
}
void draw() {
background(74, 147, 177);
if (mousePressed == true) {
selectsonicBlock();
if (grab>=0) {
sonicBlocks[grab].mouseMove();
//sonicBlocks[grab].ring();
}
}
for (int i = 0; i < count; i = i+1) {
sonicBlocks[i].display();
sonicBlocks[i].drag(.90);
}
time+=.02;
blob.display();
for (int i = 0; i < count; i ++) {
if (touching()) {
col = color(31, 52, 75);
}
else if (!touching()) {
col = color(44, 149, 171);
}
}
}
void mousePressed() {
}
void mouseReleased() {
grab = -1;
}
void selectsonicBlock() {
for (int i = 0; i < sonicBlocks.length; i ++) {
if (dist(sonicBlocks[i].posX, sonicBlocks[i].posY, mouseX, mouseY) < sonicBlocks[i].rad/2 ) {
grab = sonicBlocks[i].ID;
}
}
}
boolean touching() {
for (int i = 0; i < sonicBlocks.length; i ++) {
if (dist(sonicBlocks[i].posX, sonicBlocks[i].posY, mouseX, mouseY) < blobRad + sonicBlocks[i].rad) {
isTouching = true;
}
}
return isTouching;
}
void makeNewsonicBlock(float x, float y, float rad) {
sonicBlock newsonicBlock = new sonicBlock(sonicBlocks.length, x, y, rad, col);
sonicBlocks = (sonicBlock[]) append(sonicBlocks, newsonicBlock);
}
void keyPressed() {
if (key == CODED) {
if (keyCode == UP) {
blobRad += 10;
}
else if (keyCode == DOWN) {
blobRad -=10;
}
if (blobRad >= 400) {
blobRad = 20;
}
}
}
class sonicBlock {
float posX;
float posY;
float speedX;
float speedY;
float rad;
int ID;
color c;
float dis;
sonicBlock(int objID, float tempposX, float tempposY, float tempRad, color _c) {
ID = objID;
posX = tempposX;
posY = tempposY;
rad = tempRad;
c = _c;
//dingdong = minim.loadSnippet(fileName);
}
void display() {
noStroke();
fill(col);
rectMode(CENTER);
rect(posX, posY, rad, rad);
//changeColor();
}
/* void changeColor(){
if (touching()){
col = color(31,52,75);
}
else{
col = color(44,149,171);
}
}*/
void mouseMove() {
posX = mouseX;
posY = mouseY;
speedX = mouseX-pmouseX;
speedY = mouseY-pmouseY;
}
void drag(float drag) {
if (abs(speedX)>0.01 || abs(speedY)>0.01 ) {
speedX *= drag;
speedY *= drag;
posX = posX +speedX;
posY = posY +speedY;
if (posY < 0) posY = height;
if (posY > height) posY = 0;
if (posX < 0) posX = width;
if (posX > width) posX = 0;
}
}
/*void ring() {
if (!dingdong.isPlaying()) {
dingdong.rewind();
dingdong.play();
}
}*/
}
class Blob {
//ellipseMode(CENTER);
Blob() {
}
void display() {
fill(31, 52, 75, 60);
ellipse(mouseX, mouseY, blobRad, blobRad);
}
}

calsign

Re: intersection question

1 year ago

Now, it appears that your logic is messed up - once touching is reported as true, it never changes back to be false.
Also, it appears that all of the blocks will change color at the same time...

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