make a translated object collide with something [duplicate] - processing

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This question already has answers here:
Ball to Ball Collision - Detection and Handling
(15 answers)
Closed 2 years ago.
//Spielfeld Größe
int sizeX = 800;
int sizeY = 600;
//Robo Startposition
float roboX = sizeX/2;
float roboY = sizeY/2;
//Robo Speed
float speed = 0.03;
//Robo Acceleration
float accel = 0.05;
float x1;
float y1;
void setup() {
size(800, 600);
frameRate(60);
background(200);
}
void draw() {
background(200);
println("x " +x1);
println("y " +y1);
robo();
x1=screenX(roboX,roboX);
y1=screenY(roboY,roboY);
stopRobot();
object();
}
//Beschleunigung zurücksetzen
void mouseReleased() {
accel = 0.05;
}
void robo() {
rectMode(CENTER);
//RoboMovement
if(mousePressed){
float zielX = mouseX;
float moveX = zielX - roboX;
roboX += moveX * speed*accel;
float zielY = mouseY;
float moveY = zielY - roboY;
roboY += moveY * speed*accel;
//Beschleunigung am Anfang
if(accel< 1) {
accel += 0.05;
}
}
pushMatrix();
translate(roboX, roboY);
rotate(atan2(mouseY-roboY, mouseX-roboX));
rotate(radians(90));
//Hitbox
fill(0, 0);
stroke(160);
ellipse(0, 0, 78, 78);
noStroke();
//Track Connectors
fill(129, 29, 29);
rect(18, 12, 10, 8);
rect(18, -12, 10, 8);
rect(-18, 12, 10, 8);
rect(-18, -12, 10, 8);
//Robo Body
fill(63, 82, 21);
rect(0, 0, 13, 30);
ellipse(7, 15, 20, 20);
ellipse(-7, 15, 20, 20);
ellipse(7, -15, 20, 20);
ellipse(-7, -15, 20, 20);
rect(9, 0, 16, 23);
rect(0, 17, 20, 15);
rect(-9, 0, 16, 23);
rect(0, -17, 20, 15);
//Robo Body Details
fill(120);
ellipse(0, 0, 25, 25);
fill(60);
rect(0, -18, 6, 36);
rect(0, -36, 10, 5);
ellipse(0, 0, 20, 20);
fill(255, 0, 20);
ellipse(10, 18, 5, 5);
//Robo Tracks
//Right
fill(80);
rect(25, 0, 12, 34);
ellipse(24, 20, 10, 10);
ellipse(26, 20, 10, 10);
ellipse(24, -20, 10, 10);
ellipse(26, -20, 10, 10);
//Left
rect(-25, 0, 12, 34);
ellipse(-24, 20, 10, 10);
ellipse(-26, 20, 10, 10);
ellipse(-24, -20, 10, 10);
ellipse(-26, -20, 10, 10);
//Track Details
fill(140);
for (int i = -21; i< 22; i += 6) {
rect(25, i, 12, 2);
rect(-25, i, 12, 2);
}
popMatrix();
}
float [] [] bobject= new float [][] {{250, 250}, {500, 500}, {100, 100}};
void object() {
fill(255);
stroke(0);
circle(bobject[0][0], bobject[0][1], 20);
circle(bobject[1][0], bobject[1][1], 20);
circle(bobject[2][0], bobject[2][1], 20);
}
void stopRobot() {
if(dist(x1,y1,bobject[0][0],bobject[0][1])<=45){
speed=0;
if(mouseX<bobject[0][0]){
speed=0.03;}
if(mouseY>bobject[0][1]){
speed=0.03;}
}
if ( x1<=0+45) {
speed=0;
if (mouseX>=0) {
speed=0.03;
}
}
if ( x1>=width-45) {
speed=0;
if (mouseX<=width-45) {
speed=0.03;
}
}
if ( y1<=0+47) {
speed=0;
if (mouseY>=0+47) {
speed=0.03;
}
}
if ( y1>=height-45) {
speed=0;
if (mouseY<=height-45) {
speed=0.03;
}
}
}
This is the code, basically the idea is, that if the robot collides with the wall/objects it stops, independently from the position of the small circles.
Somehow i cant paste in the code so heres a link to the file
https://drive.google.com/drive/folders/1AvXQ2-stM-ubR38XSVG0zOaKvXHJTkC7?usp=sharing
If anybody could help me, that would be nice

Answer 1

The code was a Lil messy but I managed to make what you need, the first thing you need to do is to init the radius of the tank as a global variable so you can check your collision with it later. Secondly, its better to change your circles array by adding a 3rd value to store the radius, this way you can check the collision for multiple sized circles. Then I implemented a simple check collision method which checks for a given position (x,y) if the tank will collide with any of the circles. Lastly what you need to do is to store the tank position right before moving it, then check if the new position actually collides with any circle, if it does, you will need to stop the tank and put it back to the previous place. I hope my explanations made sense, here is the final code:
//Spielfeld Größe
int sizeX = 800;
int sizeY = 600;
//Robo Startposition
float roboX = sizeX/2;
float roboY = sizeY/2;
//Robo Speed
float speed = 0.03;
float robotRadius = 78;
//Robo Acceleration
float accel = 0.05;
float x1;
float y1;
void setup() {
size(800, 600);
frameRate(60);
background(200);
}
void draw() {
background(200);
println("x " +x1);
println("y " +y1);
robo();
x1=screenX(roboX,roboX);
y1=screenY(roboY,roboY);
object();
}
//Beschleunigung zurücksetzen
void mouseReleased() {
accel = 0.05;
}
void robo() {
rectMode(CENTER);
//RoboMovement
if(mousePressed){
//save robot position before moving it
float saveX = roboX;
float saveY = roboY;
float zielX = mouseX;
float moveX = zielX - roboX;
roboX += moveX * speed*accel;
float zielY = mouseY;
float moveY = zielY - roboY;
roboY += moveY * speed*accel;
//check if its colliding after moving it
if(checkCollision(roboX,roboY))
{
//in case the tank collide, put the robot baack and make acc = 0
accel = 0;
roboX = saveX;
roboY = saveY;
}
//Beschleunigung am Anfang
if(accel< 1) {
accel += 0.05;
}
}
pushMatrix();
translate(roboX, roboY);
rotate(atan2(mouseY-roboY, mouseX-roboX));
rotate(radians(90));
//Hitbox
fill(0, 0);
stroke(160);
ellipse(0, 0, robotRadius, robotRadius);
noStroke();
//Track Connectors
fill(129, 29, 29);
rect(18, 12, 10, 8);
rect(18, -12, 10, 8);
rect(-18, 12, 10, 8);
rect(-18, -12, 10, 8);
//Robo Body
fill(63, 82, 21);
rect(0, 0, 13, 30);
ellipse(7, 15, 20, 20);
ellipse(-7, 15, 20, 20);
ellipse(7, -15, 20, 20);
ellipse(-7, -15, 20, 20);
rect(9, 0, 16, 23);
rect(0, 17, 20, 15);
rect(-9, 0, 16, 23);
rect(0, -17, 20, 15);
//Robo Body Details
fill(120);
ellipse(0, 0, 25, 25);
fill(60);
rect(0, -18, 6, 36);
rect(0, -36, 10, 5);
ellipse(0, 0, 20, 20);
fill(255, 0, 20);
ellipse(10, 18, 5, 5);
//Robo Tracks
//Right
fill(80);
rect(25, 0, 12, 34);
ellipse(24, 20, 10, 10);
ellipse(26, 20, 10, 10);
ellipse(24, -20, 10, 10);
ellipse(26, -20, 10, 10);
//Left
rect(-25, 0, 12, 34);
ellipse(-24, 20, 10, 10);
ellipse(-26, 20, 10, 10);
ellipse(-24, -20, 10, 10);
ellipse(-26, -20, 10, 10);
//Track Details
fill(140);
for (int i = -21; i< 22; i += 6) {
rect(25, i, 12, 2);
rect(-25, i, 12, 2);
}
popMatrix();
}
//added a 3rd value to the circles array to store the radius
float [][] bobject= new float [][] {{250, 250, 20}, {500, 500, 20}, {100, 100, 20}};
void object() {
fill(255);
stroke(0);
for(int i=0; i<bobject.length; i++)
{
circle(bobject[i][0], bobject[i][1], bobject[i][2]);
}
}
//deleted stopRobot method
//created a method to check weather a specific place has a collision with a circle
boolean checkCollision(float x, float y)
{
//for every circle in the array, check weather the distance between it and the given tank position is lower than both radius sumed ( which means they collide )
for(int i=0; i<bobject.length; i++)
{
if(dist(x,y,bobject[i][0],bobject[i][1])< (robotRadius + bobject[i][2])/2)
return true;
}
return false;
}
feel free to ask in comment if you don't understand any part