problem with if statements

Programming Questions

bboyswitc..

in Programming Questions • 11 months ago

Hi guys,

i got a problem. i need a game sort of qual to snake. and i have my triangle and moving. but i use that in the draw.

so i need the balls to be in the void draw too. but if i give them a random they keep moving. if i declare it globally outside the voids. it starts with one position and thats good. but i want to go over the ball with the triangle and then it needs to dissappear and appear somewhere random on the screen. and let that dissappear again if I go over it with the triangle.

it also needs to fit in little squares of 40. so the triangle fits perfectly over the balls.

I already tried something but that didnt work out.

hope you guys can help me out.

here is my try:

int ballPos = round(random(0,amountOfSquares-1)) * SquareSize
boolean grab = false;
if(positionXTriangle == ballPos && positionYTriangle == ballPos && grab == false){
grab = true;
}
if(grab == false){
ellipse(ballPos,ballPos,40,40);
}
if(grab == true){
ellipse(random(0,width),random(0,height),40,40);
grab = false;
}

Replies(8)

Chrisir

Re: problem with if statements

11 months ago

look...

float [] ballFallX = new float [0];
float [] ballFallY = new float [0];
color [] ballFallColor = new color [0];
float ballspeed;
final int dia = 50;
float oneCell;
//
int aantalXcoordinaten = 10;
int aantalYcoordinaten = 10;
int hokjesGrootte = 40;
int windowHoogte = aantalYcoordinaten * hokjesGrootte;
int windowBreedte = aantalXcoordinaten * hokjesGrootte;
int startPosX = round(random(1, aantalXcoordinaten-2)) * hokjesGrootte + hokjesGrootte /2;
int startPosY = round(random(1, aantalYcoordinaten-2)) * hokjesGrootte + hokjesGrootte/2;
driehoek d; // the triangle
// ----------------------------------------
void setup() {
size(700, 700);
ballspeed=5;
oneCell = int ((width / dia));
for (int i=0; i<40; i++)
appendBall();
println(oneCell);
println(dia);
d = new driehoek(startPosX, startPosY);
} // func
//
void draw() {
background(0);
for (int i=0; i<ballFallX.length; i++) {
// fill (map(ballFallX[i], 0, width, 0, 255), 0, 111);
fill (ballFallColor[i]);
ellipse(ballFallX[i], ballFallY[i], dia, dia);
// println ("Here is the X array " +ballFallX[i]);
// ballFallY[i] += ballspeed;
// if (ballFallY[i]>=height-63) {
// removeItemFromArray( i );
// }
}
d.tekenKarel();
// tekenPiepballen();
}
//--------------------------------------------
// tools
void appendBall() {
ballFallX = append(ballFallX, int(random(oneCell))*dia);
ballFallY = append(ballFallY, int(random(oneCell))*dia);
ballFallColor = append(ballFallColor, color (random(0, 255), random(0, 255), random(0, 255)));
}
class driehoek {
float x, y;
float rot;
driehoek(float x, float y) {
this.x = x;
this.y = y;
}
void tekenKarel() {
fill(#FFFFFF);
pushMatrix();
translate(x, y);
rotate(rot);
triangle(-hokjesGrootte/2, hokjesGrootte/2, 0, -hokjesGrootte/2, hokjesGrootte/2, hokjesGrootte/2);
popMatrix();
}
}
// key input
void keyPressed() {
if (keyCode == UP && d.y > hokjesGrootte) {
d.rot= 0;
d.y -= hokjesGrootte;
d.rot= 0;
}
else if (keyCode == DOWN && d.y < height -hokjesGrootte) {
d.y += hokjesGrootte;
d.rot= PI;
}
else if (keyCode == RIGHT && d.x < width-hokjesGrootte) {
d.x += hokjesGrootte;
d.rot= PI*0.5;
}
else if (keyCode == LEFT && d.x > hokjesGrootte) {
d.x -= hokjesGrootte;
d.rot= PI*1.5;
}
}
/*
void tekenPiepballen(){
for(int i =0; i< 75; i++){
fill(random(255),random(255),random(255));
ellipse(startPosX,startPosY,40,40);
}
}
*/
/*
void removeItemFromArray( int i ) {
//
if (i!=ballFallX.length-1) {
ballFallX[i] = ballFallX[ballFallX.length-1];
ballFallY[i] = ballFallY[ballFallX.length-1];
}
// shorten
ballFallX = (float[]) shorten(ballFallX);
ballFallY = (float[]) shorten(ballFallY);
}
*/
//

bboyswitc..

Re: problem with if statements

11 months ago

nice! but do you know how i could fix my problem with if statements?

Chrisir

Re: problem with if statements

11 months ago

here...

float [] ballFallX = new float [0];
float [] ballFallY = new float [0];
color [] ballFallColor = new color [0];
//
// float ballspeed;
final int dia = 40;
float oneCell;
//
int aantalXcoordinaten = 10;
int aantalYcoordinaten = 10;
int hokjesGrootte = 40;
int windowHoogte = aantalYcoordinaten * hokjesGrootte;
int windowBreedte = aantalXcoordinaten * hokjesGrootte;
int startPosX = round(random(1, aantalXcoordinaten-2)) * hokjesGrootte + hokjesGrootte /2;
int startPosY = round(random(1, aantalYcoordinaten-2)) * hokjesGrootte + hokjesGrootte/2;
driehoek d; // the triangle
// ----------------------------------------
void setup() {
size(700, 700);
// ballspeed=5;
startPosX+=20;
startPosY+=20;
//
oneCell = ((width / dia));
for (int i=0; i<40; i++)
appendBall();
println(oneCell);
println(dia);
d = new driehoek(startPosX, startPosY);
} // func
//
void draw() {
background(0);
for (int i=0; i<ballFallX.length; i++) {
// fill (map(ballFallX[i], 0, width, 0, 255), 0, 111);
fill (ballFallColor[i]);
ellipse(ballFallX[i], ballFallY[i], dia, dia);
// println ("Here is the X array " +ballFallX[i]);
// ballFallY[i] += ballspeed;
// if (ballFallY[i]>=height-63) {
// removeItemFromArray( i );
// }
d.collision( ballFallX[i], ballFallY[i], i );
}
d.tekenKarel();
// tekenPiepballen();
}
//--------------------------------------------
// tools
void appendBall() {
ballFallX = append(ballFallX, int(random(oneCell))*dia);
ballFallY = append(ballFallY, int(random(oneCell))*dia);
ballFallColor = append(ballFallColor, color (random(0, 255), random(0, 255), random(0, 255)));
}
class driehoek {
float x, y;
float rot;
driehoek(float x, float y) {
this.x = x;
this.y = y;
}
void collision( float x_Ball, float y_Ball, int i ) {
if (x>x_Ball-dia/2 && x<x_Ball+dia/2 &&
y>y_Ball-dia/2 && y<y_Ball+dia/2) {
removeItemFromArray(i);
} // if
} // func
void tekenKarel() {
fill(#FFFFFF);
pushMatrix();
translate(x, y);
rotate(rot);
triangle(-hokjesGrootte/2, hokjesGrootte/2, 0, -hokjesGrootte/2, hokjesGrootte/2, hokjesGrootte/2);
popMatrix();
}
}
// key input
void keyPressed() {
if (keyCode == UP && d.y > hokjesGrootte) {
d.rot= 0;
d.y -= hokjesGrootte;
d.rot= 0;
}
else if (keyCode == DOWN && d.y < height -hokjesGrootte) {
d.y += hokjesGrootte;
d.rot= PI;
}
else if (keyCode == RIGHT && d.x < width-hokjesGrootte) {
d.x += hokjesGrootte;
d.rot= PI*0.5;
}
else if (keyCode == LEFT && d.x > hokjesGrootte) {
d.x -= hokjesGrootte;
d.rot= PI*1.5;
}
}
/*
void tekenPiepballen(){
for(int i =0; i< 75; i++){
fill(random(255),random(255),random(255));
ellipse(startPosX,startPosY,40,40);
}
}
*/
void removeItemFromArray( int i ) {
//
if (i!=ballFallX.length-1) {
ballFallX[i] = ballFallX[ballFallX.length-1];
ballFallY[i] = ballFallY[ballFallX.length-1];
ballFallColor[i]= ballFallColor[ballFallX.length-1];
}
// shorten
ballFallX = (float[]) shorten(ballFallX);
ballFallY = (float[]) shorten(ballFallY);
ballFallColor = (color[]) shorten(ballFallColor);
}
//

bboyswitc..

Re: problem with if statements

11 months ago

Woah! nice thats what i needed but i didnt read my assignment right and it needs to appear one after one. the same concept as snake but then with a triangle instead of a snake.

Chrisir

Re: problem with if statements

11 months ago

great!

I am sure you'll figure it out since you need to learn to program.

bboyswitc..

Re: problem with if statements

11 months ago

no, i wont :(

thats why i posted my problem on this forum

i tried it with if statements and i can make the circle dissappear but i cant get the circle to re-appear on the screen on another random position

Chrisir

Re: problem with if statements

11 months ago

you'll find it all in my latest program.

Chrisir

Re: problem with if statements

11 months ago

let me see ...

in my last Code

delete line 25:

for (int i=0; i<40; i++)

After line 65 insert

appendBall();

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