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<script lang="ts">
import type { FileData } from "@gradio/client";
import { BlockLabel, IconButton } from "@gradio/atoms";
import { File, Download, Undo } from "@gradio/icons";
import { add_new_model, reset_camera_position } from "./utils";
import { onMount } from "svelte";
import * as BABYLON from "babylonjs";
import * as BABYLON_LOADERS from "babylonjs-loaders";
import type { I18nFormatter } from "@gradio/utils";
import { dequal } from "dequal";
export let value: FileData | null;
export let clear_color: [number, number, number, number] = [0, 0, 0, 0];
export let label = "";
export let show_label: boolean;
export let i18n: I18nFormatter;
export let zoom_speed = 1;
export let pan_speed = 1;
// alpha, beta, radius
export let camera_position: [number | null, number | null, number | null] = [
null,
null,
null
];
let current_settings = { camera_position, zoom_speed, pan_speed };
$: {
if (
BABYLON_LOADERS.OBJFileLoader != undefined &&
!BABYLON_LOADERS.OBJFileLoader.IMPORT_VERTEX_COLORS
) {
BABYLON_LOADERS.OBJFileLoader.IMPORT_VERTEX_COLORS = true;
}
}
let canvas: HTMLCanvasElement;
let scene: BABYLON.Scene;
let engine: BABYLON.Engine | null;
let mounted = false;
onMount(() => {
engine = new BABYLON.Engine(canvas, true);
window.addEventListener("resize", () => {
engine?.resize();
});
mounted = true;
});
$: ({ path } = value || {
path: undefined
});
$: canvas && mounted && path && dispose();
function dispose(): void {
if (scene && !scene.isDisposed) {
scene.dispose();
engine?.stopRenderLoop();
engine?.dispose();
engine = null;
engine = new BABYLON.Engine(canvas, true);
window.addEventListener("resize", () => {
engine?.resize();
});
}
if (engine !== null) {
scene = add_new_model(
canvas,
scene,
engine,
value,
clear_color,
camera_position,
zoom_speed,
pan_speed
);
}
}
function handle_undo(): void {
reset_camera_position(scene, camera_position, zoom_speed, pan_speed);
}
$: {
if (
scene &&
(!dequal(current_settings.camera_position, camera_position) ||
current_settings.zoom_speed !== zoom_speed ||
current_settings.pan_speed !== pan_speed)
) {
reset_camera_position(scene, camera_position, zoom_speed, pan_speed);
current_settings = { camera_position, zoom_speed, pan_speed };
}
}
</script>
<BlockLabel
{show_label}
Icon={File}
label={label || i18n("3D_model.3d_model")}
/>
{#if value}
<div class="model3D">
<div class="buttons">
<IconButton Icon={Undo} label="Undo" on:click={() => handle_undo()} />
<a
href={value.url}
target={window.__is_colab__ ? "_blank" : null}
download={window.__is_colab__ ? null : value.orig_name || value.path}
>
<IconButton Icon={Download} label={i18n("common.download")} />
</a>
</div>
<canvas bind:this={canvas} />
</div>
{/if}
<style>
.model3D {
display: flex;
position: relative;
width: var(--size-full);
height: var(--size-full);
}
canvas {
width: var(--size-full);
height: var(--size-full);
object-fit: contain;
overflow: hidden;
}
.buttons {
display: flex;
position: absolute;
top: var(--size-2);
right: var(--size-2);
justify-content: flex-end;
gap: var(--spacing-sm);
z-index: var(--layer-5);
}
</style>
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