Problem with Javascript project - Project Fishtank – Khan Academy Help Center

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Shaan

10 september 2016 17:59

I am working on Project Fishtank in "Intro to JS: Drawing & Animations". I am having problems getting past steps 2 and 3 (calling functions). I am not able to move the fish around because all my fish end up on top of each other in the same location instead of being spread out in different locations. Here is what I have so far:

background(89, 216, 255);

var centerX = 200;
var centerY = 100;
var bodyLength = 118;
var bodyHeight = 74;
var bodyColor = color(162, 0, 255);

noStroke();
fill(bodyColor);
// body
ellipse(centerX, centerY, bodyLength, bodyHeight);
// tail
var tailWidth = bodyLength/4;
var tailHeight = bodyHeight/2;
triangle(centerX-bodyLength/2, centerY,
centerX-bodyLength/2-tailWidth, centerY-tailHeight,
centerX-bodyLength/2-tailWidth, centerY+tailHeight);
// eye
fill(33, 33, 33);
ellipse(centerX+bodyLength/4, centerY, bodyHeight/5, bodyHeight/5);

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6 opmerkingen

Rudolf Petzolt

11 september 2016 11:10
0

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You have to change centerX and centerY either by a loop or with help of centerX / centerY = random(50, 350) by example.
Shaan

14 september 2016 23:08
0

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Thanks! I tried that but it still is not working. Do you have any more tips or suggestions. Do you know if there is any other way to get assistance on Khan Academy?
Shaan

14 september 2016 23:19
0

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Here is exactly what I did for the "random" requirement:

var centerX= random(50, 350);
var centerY = random(50, 350);

When I do this, the fish all appear on top of each other in the same location so it looks like there is only one fish even though we tried drawing 3-4 fish
Benjamin Clements

14 september 2016 23:22
0

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Make sure that you don't have the background call inside your drawFish function which would clear the screen of everything else... just evaluated a year old project with that issue (and yes, I failed them for it lol, if they still care it's an easy fix if they don't then it doesn't matter).
Shaan

15 september 2016 00:08
0

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I got it! Thanks for the help!
Benjamin Clements

15 september 2016 00:22
0

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Great to hear that, best of luck to you in the future :)

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Problem with Javascript project - Project Fishtank

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