Commit 4e89a0c2 authored by Grant's avatar Grant
Browse files

fix issue with blank frames if section has no pixels

parent 0f37fa67

.env→.env.example

+0 −0

File moved.

View file

.gitignore

+2 −1
Original line number Diff line number Diff line
@@ -2,3 +2,4 @@ data 
frames

node_modules

out.mp4

.env
 
 No newline at end of file

src/index.ts

+1 −1
Original line number Diff line number Diff line
@@ -42,7 +42,7 @@ client.connect().then(async () => { 


  const start = startDate.getTime();

  const end = endDate.getTime();

  const framesPerWorker = Math.floor((end - start) / WORKER_COUNT);

  const framesPerWorker = Math.floor((end - start) / (WORKER_COUNT - 1));

  const frameStartIncrement = Math.floor(framesPerWorker / MS_PER_FRAME);

  const framesToGenerate = Math.floor((end - start) / MS_PER_FRAME);

  console.log(framesToGenerate + " frames need to be generated");

src/render_worker.ts

+19 −6
Original line number Diff line number Diff line
@@ -33,6 +33,8 @@ type Pixel = { 
};



let workerId: number;

let assigned = false;

let workerStart: Date; // date the worker should start at



const database = client.connect();
@@ -42,6 +44,14 @@ parentPort?.on("message", (msg: Message) => { 
      workerId = msg.workerId;

      break;

    case "assignment": {

      if (assigned) {

        log("I RECEIVED ANOTHER ASSIGNMENT, THIS SHOULDN'T HAPPEN");

        return;

      }

      assigned = true;



      workerStart = new Date(msg.start);



      database.then(async () => {

        const start = Date.now();

        const framesToGenerate = (msg.end - msg.start) / msg.step;
@@ -98,15 +108,18 @@ const generateFrame = async (frameId: number, pixels: Pixel[]) => { 
      prevFrame.height

    );

  } else {

    // check if pixels are needing to be drawn, if not we can skip

    let startTime: Date;



    if (pixels.length > 0) {

      startTime = new Date(pixels[0].date);

    } else {

      startTime = workerStart;

    }



    // no previous frame exists, guess we will have to load from the database

      const previousPixels = await query.existingPixelsBeforeTime(

        new Date(pixels[0].date)

      );

    const previousPixels = await query.existingPixelsBeforeTime(startTime);

    pixels = [...dbPixelsToLog(previousPixels.rows), ...pixels];

  }

  }



  const pixelScale = [

    OUTPUT_SIZE[0] / CANVAS_SIZE[0],