fun things

main-old.js

@@ -0,0 +1,104 @@
+function clamp(min, val, max) {
+    if (val < min) {
+        val = min;
+    }
+    if (val > max) {
+        val = max;
+    }
+    return val;
+}
+
+const scrollchecks = () => {
+    var el = document.getElementById("header");
+    el.style.backgroundPositionY = 50 + (document.documentElement.scrollTop/el.scrollHeight) / 2 * 100 + "%";
+    Array.from(document.getElementsByClassName("scrolly")).forEach(el => {
+        let box = el.getBoundingClientRect();
+        if (box.bottom < 0 || box.top >= window.innerHeight) {
+            el.classList.add("scrolly-out");
+            el.classList.remove("scrolly-in");
+            el.classList.remove("scrolly-onedge");
+        }
+        else {
+            el.classList.remove("scrolly-out");
+            el.classList.add("scrolly-in");
+            el.classList.add("scrolly-entered");
+            if (box.top <= 0 || box.bottom >= window.innerHeight) {
+                el.classList.add("scrolly-onedge");
+            }
+            else {
+                el.classList.remove("scrolly-onedge");
+            }
+        }
+        if (box.top + box.height / 2 <= window.innerHeight / 2) {
+            el.classList.add("scrolly-tophalf");
+            el.classList.remove("scrolly-bottomhalf");
+        }
+        else {
+            el.classList.remove("scrolly-tophalf");
+            el.classList.add("scrolly-bottomhalf");
+        }
+    });
+    var perc = clamp(0, document.getElementById("outer").scrollTop / (window.innerHeight / 2), 1);
+    document.querySelector("#headin > h1").style.fontSize = 2 + 4 * (1 - perc) + "em";
+    document.querySelector("#links").style.opacity = perc;
+    //document.querySelector("#carousel").style.opacity = perc;
+};
+window.addEventListener("scroll", scrollchecks);
+window.addEventListener("scrollend", scrollchecks);
+window.addEventListener("wheel", scrollchecks);
+window.addEventListener("resize", scrollchecks);
+window.addEventListener("load", scrollchecks);
+window.addEventListener("touchmove", scrollchecks);
+setInterval(scrollchecks, 250); // Computers are fast and scrolling in JavaScript is dumb. Shoot me.
+var gallery_position = 0;
+var last_cycle = window.performance.now();
+var GALLERYSPEED = -100;
+var oldTouch = undefined;
+
+document.getElementById("carousel-inner").addEventListener("wheel", (evt) => {
+    GALLERYSPEED = (-evt.deltaX + evt.deltaY) * 100;
+    evt.preventDefault();
+});
+
+document.getElementById("carousel-inner").addEventListener("touchmove", (evt) => {
+    var tuch = evt.touches[0];
+    if (oldTouch) {
+        GALLERYSPEED = -(oldTouch.pageX - tuch.pageX) * 100;
+    }
+    oldTouch = tuch;
+});
+
+document.getElementById("carousel-inner").addEventListener("touchend", () => {
+    oldTouch = undefined;
+});
+
+function main() {
+    var elapsed_time = window.performance.now() - last_cycle;
+    last_cycle += elapsed_time;
+    requestAnimationFrame(main);
+    var el = document.getElementById("carousel-inner");
+    if (getComputedStyle(el).getPropertyValue("--do-scroll") == "yes" && !oldTouch) {
+        GALLERYSPEED = -100;
+    }
+    else {
+        GALLERYSPEED *= Math.pow(0.1, elapsed_time / 1000)
+    }
+    gallery_position += GALLERYSPEED * elapsed_time / 1000;
+    if (gallery_position > 0) {
+        var hammer = el.lastChild;
+        el.removeChild(hammer);
+        var smol = el.scrollWidth;
+        el.insertBefore(hammer, el.firstChild);
+        gallery_position -= (el.scrollWidth - smol);
+    }
+    if (gallery_position < -(el.scrollWidth - window.innerWidth)) {
+        var hammer = el.firstChild;
+        el.removeChild(hammer);
+        var smol = el.scrollWidth;
+        el.appendChild(hammer);
+        gallery_position += (el.scrollWidth - smol);
+    }
+    el.style.transform = "translate(" + gallery_position + "px, 0)";
+}
+
+main();