Cycle through rows of external file after interval of time has elapsed

Programming Questions

kpowe11

Cycle through rows of external file after interval of time has elapsed

in Programming Questions • 2 years ago

Hello,

I'm trying to cycle through an external file and draw points after an interval has passed.

Here is my code:

for (int row = 0; row < firstRowCount; row++) {
if(millis() > start + 200) {
float x = firstLocationTable.getFloat(row, 1) * 2 + 250; // column 1
float y = firstLocationTable.getFloat(row, 2) * 2 + 100; // column 2
ellipse(x, y, 3, 3);
fill(192, 150, 0, 10);
}
}

This works but loads all rows after the 200ms has passed instead of loading each row after 200ms has elapsed before moving the next row. Any help would be greatly appreciated. Thanks.

Replies(4)

amnon.owed

Re: Cycle through rows of external file after interval of time has elapsed

2 years ago

Based on the partial code, probably something like this.

int row; // global variable outside draw and setup
if(millis() > start && millis() % 200 == 0 && row < firstRowCount) {
row++;
float x = firstLocationTable.getFloat(row, 1) * 2 + 250; // column 1
float y = firstLocationTable.getFloat(row, 2) * 2 + 100; // column 2
ellipse(x, y, 3, 3);
fill(192, 150, 0, 10);
}

kpowe11

Re: Cycle through rows of external file after interval of time has elapsed

2 years ago

Thanks! The points do now flicker but they disappear almost as quickly as they appear. Is there a way to keep them drawn and have them accumulate on screen?

Sketch: