#Iteration problem?

30 messages · Page 1 of 1 (latest)

surreal hemlock
#

my code:

      for (int x = 0; x < pyramidVectors[level].length; x++) {
        for (int y = 0; y < pyramidVectors[level].length; y++) {
          pyramidVectors[level][x][y] = new PVector(x + (-2* PYRAMID_SIZE) + level, y + (-2* PYRAMID_SIZE) + level, level + (-1 * PYRAMID_SIZE));
          if (pyramidVectors[level][x][y].getX() == 0 && pyramidVectors[level][x][y].getY() == 0 && pyramidVectors[level][x][y].getZ() == 0) {
            pyramidVectors[level][x][y] = null;
          } 
          
        }
      }
    }```

sets `pyramidVectors[level][x][y]` to `null` whenever the loop encounters a `pyramidVectors[level][x][y]` where `level + x` = 6,

however the following code:
```public static void printVectorList() {
    for (int level = 0; level < pyramidLevels; level++) {
      for (int x = 0; x < pyramidVectors[level].length; x++) {
        for (int y = 0; y < pyramidVectors[level].length; y++) {
          
          if (pyramidVectors[level][x][y]!= null) {
            System.out.println("["+level+"]"+"["+x+"]"+"["+y+"]\n"+pyramidVectors[level][x][y]);
          }

          if (pyramidVectors[level][x][y]== null) {
            System.out.println("["+level+"]"+"["+x+"]"+"["+y+"]\n(null)");
          }
          
        }
      }
    }
  }```

is able to correctly print each vector... what gives?

Attached is the print output of the second function with the format:
```[level][x][y]
(x,y,z)```
📎 message.txt
pastel haloBOT
#

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odd bison
#

how is this related to generics..?

surreal hemlock
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i honestly thought generics was like a generic question

odd bison
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either way they aren't relevant to this question yeah, but you can check them out later (or now) if you want

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anyways

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i don't see anything that says level + x == 6 there

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your if checks if all the coords are 0, which would happen if x + level = 2 * PYRAMID_SIZE and y + level = 2 * PYRAMID_SIZE and level = PYRAMID_SIZE, so only when x = y = level i think
are you sure that's being reached?

surreal hemlock
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[0,0,0] is reached

odd bison
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is PYRAMID_SIZE 0 though?

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what's PYRAMID_SIZE?

surreal hemlock
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PYRAMID_SIZE = 3

odd bison
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and what's pyramidLevels, and pyramidVectors[level].length?

surreal hemlock
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pyramid vectors is a 3 dimensional array with pyramidVectors[0][13][13], pyramidVectors[1][11][11] up to pyramidVectors[7][1][1]

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so the broken function attempts to iterate through the 3 dimensional array

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but also I think you might be right in that [1][1][1] is missing from the printed list

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i haven no clue why that specific list index would not be accessed though

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actually [1][1][1] appears, nvm

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the only problem is that when level + x = 2* PYRAMID_SIZE, the PVector is set to null

odd bison
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wait isn't that what you wanted

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im confused

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what's the intended behavior

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(sec brb)

surreal hemlock
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the intended behavior for the misfunctioning for loop is that all indices are given a PVector with coordinates (x - (2 **PYRAMID_SIZE) + level, y - (2*PYRAMID_SIZE) + level, z - PYRAMID_SIZE)

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(x,y,z) format

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however the problem is that indices where Level + x = 6 are set as a null vector

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for example, [0][6][0] should be (0,-6,-3) for PYRAMID_SIZE = 3

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note that the list indices are technically [z][x][y] but the vectors are (x,y,z)