Auto-growing line not showing – need help debugging

Questions
1

I want to implement a line that grows progressively over time, but it’s not displaying and I’m not sure why.

2

Hello,

I see 2 problems here :

  • You set the first version of the GreasedLine with an empty array (which I guess is triggering the error logger.ts:107 BJS - [11:45:41]: Setting vertex data kind 'position' with an empty array). You should at least fill the first points just before the first drawLine call :
for (let i = 0; i < growthSpeed; i++) {
    currentRenderedPoints.push(fullPathPoints[currentPointIndex]);
    currentPointIndex++;
}
  • For the color in the drawLine I don’t get you logic here :
for (let i = 0; i < maxPointsLength; i++) {
    if (i < maxPointsLength / 2) {
        colors.push(color1);
    } else {
        colors.push(color2);
    }
}

First, in this loop i<maxPointsLength is always true. Second, If you want a bi-color line, you can indeed feed a colors list, but make sure that the color and point list is the same size. Here you are feeding a full colors list with a partial point list, which is not right