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function compute()
{
/*
* Get framerate, start frame, and end frame from corresponding elements
* Double check they all have a value
*/
const fps = parseInt(document.getElementById("framerate").value);
const sframe = document.getElementById("startobj").value;
const eframe = document.getElementById("endobj").value;
if (typeof (sframe) === "undefined" || typeof (eframe) === "undefined"
|| typeof (fps) === "undefined")
return;
const frames = (eframe - sframe) * fps;
const s = Math.round(frames / fps * 1000) / 1000;
/* Show the time and mod message in the DOM */
const ftime = time_format(s);
const mod_message = `Mod Note: Retimed (Start Frame: ${sframe * fps}, End Frame: ${
eframe * fps}, FPS: ${fps}, Total Time: ${ftime})`;
document.getElementById("time").value = ftime;
document.getElementById("mod_message").disabled = false;
document.getElementById("mod_message").innerText = mod_message;
document.getElementById("mod_message_button").disabled = false;
}
/* Convert seconds to human readable time */
function time_format(t)
{
const h = ~~(t / 3600);
const m = ~~((t % 3600) / 60);
const s = ~~t % 60;
let ret = "";
if (h > 0)
ret += h + ":" + (m < 10 ? "0" : "");
ret += m + ":" + (s < 10 ? "0" : "");
ret += s;
/* Milliseconds */
const st = t.toString();
if (!isNaN(t) && st.indexOf(".") != -1)
ret += "." + st.split(".")[1];
return ret;
}
/* Allow user to copy mod message to clipboard */
function copy_mod_message()
{
const text_area = document.getElementById("mod_message");
text_area.focus();
text_area.select();
document.execCommand("copy");
}
/* If framerate is invalid, show an error message and disable start and end frame fields */
const check_fps =
(event) => {
if (event.target.value === "" || parseInt(event.target.value) <= 0
|| isNaN(parseInt(event.target.value))) {
document.getElementById("framerate")
.setCustomValidity("Please enter a valid framerate.");
document.getElementById("framerate").reportValidity();
document.getElementById("startobj").disabled = true;
document.getElementById("endobj").disabled = true;
document.getElementById("compute_button").disabled = true;
} else {
document.getElementById("startobj").disabled = false;
document.getElementById("endobj").disabled = false;
document.getElementById("compute_button").disabled = false;
}
}
/* Get current frame from input field (either start time or end time) */
const parse_time = (event) => {
let inptext_frame = (JSON.parse(event.target.value)).lct;
if (typeof inptext_frame !== "undefined") {
const fps = parseInt(document.getElementById("framerate").value);
const frame_from_obj = (t, fps) => Math.floor(t * fps) / fps;
const fframe = frame_from_obj(inptext_frame, fps);
document.getElementById(event.target.id).value = `${fframe}`;
}
}
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