Mad Pod Racing - Puzzle Discussion

Puzzles
#167

Why am i unable to use arrays in c++?

#169

TYPO: In the description, one of the bullet points says


  • The thrust value of a pod is it’s acceleration and must be between 0 and 100.

It should say its acceleration (without the apostrophe).

2 Likes
#170

Someone can explain me how the nextCheckpointAngle is calculated?

1 Like
#171

Look up a trig function called ATan2. Depending on your language of choice, it might be a built-in function.

#172

Is nextCheckpointAngle the arctangent between my pod direction and checkpoint direction?

#173

Hello,

J’adore ce challenge il n’est pas trop compliquĂ© mais je n’ai toujours pas trouvĂ© quelle est la formule pour prevoir la position du pod aprĂšs un coup.
Si j’ai en entrĂ©e la position du pod X,Y, un angle A et une vitesse V et que ma sortie est : TX,TY Thrust quelle est ma position finale?

Quelqu’un connait la formule svp?

#174

Can you tell me how can I train my neural network? I don’t know how to train it because i don’t have a game on my computer?

#175

No hint? What does the thrust mean?and the NextCheckpointangle?

2 Likes
#176

Hi SE. I notice you’re programming in C++. Do all languages get access to the same libraries? (at the higher levels). Or do some languages (eg Python, C++, Java) get better libraries?

#177

How can I use boost?
I did as I was told↓
thrust = BOOST;

#178

Output the word BOOST where you would ordinarily output the numeric thrust value.

#179

Pod angle input is incorrect the first turns.
I always get -1:
3427 6718 0 0 -1 1

Obviously, my pod thinks it’s turned the wrong way, and doesn’t accelerate until I start getting correct data at turn 4.

#180

You can turn as far as you want on the first turn, so the initial input angle doesn’t matter.

#181

Still, the value is incorrect.
My bot doesn’t know what turn it is, and trusts the input to be correct every turn. Of course I could work around this but it doesn’t seem right


#182

There isn’t a value that would be correct - the pod doesn’t actually have an angle at that point. The angles are always 0-359 on later turns, so you probably should handle -1 as a special case.

#183

I see, it makes sense that initial angle is decided after my first output.

What confused me was the input showed -1 while the graphical representation showed a rotated pod.
I realize now that my output is handled before the graphics are drawn. Thanks!

#184

It worked! thank you!!

#185

I think the solution for that you need to optimize your program and, try to inspect things as well.

#186

Debug mode currently does not show the shield effect. It be nice if this can be patched in as I am doing all my programming/testing with debug mode enabled.

Would it also be possible to change the colors? I got issues with read an can not see the red line of the enemy in debug mode. :slight_smile:

Love the game, really a lot of fun!

Can someone tell me what the difference between the circle outline is in debug mode, and my graphical race pod?
The position I get through the input stream the one of the outline, but the game visualizes and shows another position, possible future position.
Which one is used to do collision on?

1 Like
#187

Hi, I’m stuck on the use of BOOST, it puts me " invalid input. Expected ‘x y power’ but found ‘5497 7525 1431652838 9710’ ".
I don’t know how to do it if you could help me.

> #include <stdlib.h>
> #include <stdio.h>
> #include <string.h>
> #include <stdbool.h>

> /**
>  * Auto-generated code below aims at helping you parse
>  * the standard input according to the problem statement.
>  **/
> int main()
> {
>     // game loop
>     
>     while (1) {
>         
>         int x;
>         int y;
>         int nextCheckpointX; // x position of the next check point
>         int nextCheckpointY; // y position of the next check point
>         int nextCheckpointDist; // distance to the next checkpoint
>         int nextCheckpointAngle; // angle between your pod orientation and the direction of the next checkpoint
>         scanf("%d%d%d%d%d%d", &x, &y, &nextCheckpointX, &nextCheckpointY, &nextCheckpointDist, &nextCheckpointAngle);
>         int opponentX;
>         int opponentY;
>         scanf("%d%d", &opponentX, &opponentY);
>         int vit;
>         bool boost = true ;
>         // Write an action using printf(). DON'T FORGET THE TRAILING \n
>         // To debug: fprintf(stderr, "Debug messages...\n");
>         
>         if((boost == true) && (nextCheckpointAngle == 0) && (nextCheckpointDist > 6000 ))
>         {
>          vit = "BOOST";
>          boost = false;
>         }
>         else if(nextCheckpointAngle>90 || nextCheckpointAngle<-90)
>         {
>             vit=0;
>         }
>         else
>         {
>             vit=100;
>         }
>       
>         // You have to output the target position
>         // followed by the power (0 <= thrust <= 100)
>         // i.e.: "x y thrust"
>         printf("%d %d %d %d\n", nextCheckpointX, nextCheckpointY,vit,nextCheckpointDist);
>     }

>     return 0;
> }