a

1 files changed, 154 insertions, 0 deletions

diff --git a/viewer/resources.ts b/viewer/resources.ts
new file mode 100644
index 0000000..0340e31
--- /dev/null
+++ b/viewer/resources.ts
@@ -0,0 +1,154 @@
+
+export class Resource<T> {
+    constructor(public hash: Uint8Array) { }
+    toString() {
+        return Array.from(this.hash)
+            .map(e => e.toString(16).padStart(2, "0"))
+            .join("")
+    }
+    async download_raw() {
+        const res = await fetch(`http://127.0.0.1:28556/${this.toString()}`)
+        if (!res.ok) throw new Error("aaaa");
+        return await res.bytes()
+    }
+}
+
+export function read_res_table(buffer: Uint8Array, cb: (key: string, value: Uint8Array) => void) {
+    const view = new DataView(buffer.buffer)
+    let p = 0
+    while (p < view.byteLength) {
+        const key_len = view.getInt16(p, true)
+        p += 2
+        const value_len = view.getInt16(p, true)
+        p += 2
+        const key = String.fromCharCode(...buffer.slice(p, p + key_len))
+        p += key_len
+        const value = buffer.slice(p, p + value_len)
+        p += value_len
+        cb(key, value)
+    }
+}
+
+function get_vec3(b: Uint8Array): Vec3 {
+    const k = new DataView(b.buffer)
+    return {
+        x: k.getFloat32(0, true),
+        y: k.getFloat32(4, true),
+        z: k.getFloat32(8, true),
+    }
+}
+function get_aabb(b: Uint8Array): AABB {
+    return {
+        min: get_vec3(b.slice(0, 12)),
+        max: get_vec3(b.slice(12, 24))
+    }
+}
+
+export async function get_respackentry(r: Resource<RespackEntry>): Promise<RespackEntry> {
+    console.log(`load respackentry ${r}`);
+    const buf = await r.download_raw();
+    const o: RespackEntry = {}
+    read_res_table(buf, (key, value) => {
+        switch (key) {
+            case "c_spatial_index":
+                o.c_spatial_index = new Resource(value)
+                break
+            default:
+        }
+    });
+    return o
+}
+export async function get_spatialindex(r: Resource<SpatialIndex>): Promise<SpatialIndex> {
+    // console.log(`load spatialindex ${r}`);
+    const buf = await r.download_raw();
+    const o: SpatialIndex = { child: [] }
+    read_res_table(buf, (key, value) => {
+        switch (key) {
+            case "prefab":
+                o.prefab = new Resource(value)
+                break
+            case "child":
+                o.child.push([
+                    get_aabb(value.slice(0, 24)),
+                    new Resource(value.slice(24, 56))
+                ])
+                break
+            default:
+        }
+    });
+    return o
+}
+export async function get_prefab(r: Resource<Prefab>): Promise<Prefab> {
+    console.log(`load prefab ${r}`);
+    const buf = await r.download_raw();
+    const o: Prefab = { graphics: [] }
+    read_res_table(buf, (key, value) => {
+        switch (key) {
+            case "graphics":
+                o.graphics.push([undefined as unknown as Affine3, new Resource(value.slice(48, 80))])
+                break
+            default:
+        }
+    });
+    return o
+}
+export async function get_graphics_part(r: Resource<GraphicsPart>): Promise<GraphicsPart> {
+    console.log(`load graphics ${r}`);
+    return new GraphicsPart(await r.download_raw())
+}
+
+export interface Vec3 { x: number, y: number, z: number }
+export interface AABB { min: Vec3, max: Vec3 }
+export interface Mat3 { x: Vec3, y: Vec3, z: Vec3 }
+export interface Affine3 { basis: Mat3, origin: Vec3 }
+
+export interface SpatialIndex {
+    level?: number
+    prefab?: Resource<undefined>
+    child: [AABB, Resource<undefined>][]
+}
+export interface RespackEntry {
+    c_spatial_index?: Resource<SpatialIndex>
+}
+export interface Prefab {
+    graphics: [Affine3, Resource<GraphicsPart>][]
+}
+export class GraphicsPart {
+    commands: GraphicsCommand[] | undefined
+    constructor(public buffer: Uint8Array) { }
+
+    read(): GraphicsCommand[] {
+        if (this.commands) return this.commands
+
+        const out: GraphicsCommand[] = []
+        let p = 0
+        while (p < this.buffer.length) {
+            const step = this.buffer[p + 0]
+            const kind = this.buffer[p + 1]
+            p += 2
+            if (kind == 0) {
+                if (step == 0) out.push({ no_fill: true })
+                else if (step == 1) out.push({ fill: this.buffer[p + 0] })
+                else throw new Error("bbb");
+            } else if (kind == 1) {
+                if (step == 0) out.push({ no_stroke: true })
+                else if (step == 1) out.push({ stroke: this.buffer[p + 0] })
+                else throw new Error("ccc");
+            }
+            else throw new Error("aaa");
+
+            p += step
+        }
+
+        this.commands = out
+        return out
+    }
+}
+
+export interface GraphicsCommand {
+    no_fill?: true,
+    fill?: number,
+    no_stroke?: true
+    stroke?: number
+    point?: Vec3
+}
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