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buster.test.ts
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/**
Miku-Legends-2
Copyright (C) 2024, DashGL Project
By Kion (kion@dashgl.com)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
import { test, expect } from "bun:test";
import { readFileSync } from "fs";
import ByteReader from '../src/ByteReader';
import buster from '../fixtures/buster.json';
import { Vector3, Matrix4 } from "three";
import { dwordString } from "../src/MeshReader";
import { encodeVertexBits } from "../src/MeshWriter";
const SCALE = 0.00125;
const RESTORE = 800;
const ROT = new Matrix4();
ROT.makeRotationX(Math.PI);
type MeshHeader = {
name: string;
triCount: number;
quadCount: number;
vertCount: number;
triOfs: number;
quadOfs: number;
vertOfs: number;
triShadowOfs: number;
quadShadowOfs: number;
}
test("Reading the strip offsets for the buster", () => {
const file = readFileSync(`./bin/PL00P000.BIN`);
const dat = file.subarray(0x30, 0x30 + 0x2b40);
const { buffer } = Buffer.from(dat);
const reader = new ByteReader(buffer as ArrayBuffer);
const BUSTER_OFS = 0x2220;
const names = ["40_LEFT_SHOULDER", "41_BUSTER", "42_BULLET_MAYBE"];
reader.seek(BUSTER_OFS);
const meshes: MeshHeader[] = [];
names.forEach((name) => {
const triCount = reader.readUInt8();
const quadCount = reader.readUInt8();
const vertCount = reader.readUInt8();
reader.seekRel(1);
const triOfs = reader.readUInt32();
const quadOfs = reader.readUInt32();
const vertOfs = reader.readUInt32();
const triShadowOfs = reader.readUInt32();
const quadShadowOfs = reader.readUInt32();
meshes.push({
name,
triCount,
quadCount,
vertCount,
triOfs,
quadOfs,
vertOfs,
triShadowOfs,
quadShadowOfs
})
});
expect(meshes).toEqual(buster);
});
test('Re-encoding the vertices read from the hair', () => {
const file = readFileSync(`./bin/PL00P000.BIN`);
const dat = file.subarray(0x30, 0x30 + 0x2b40);
const { buffer } = Buffer.from(dat);
const reader = new ByteReader(buffer as ArrayBuffer);
buster.map((mesh) => {
const { vertOfs, vertCount } = mesh;
reader.seek(vertOfs);
for (let i = 0; i < vertCount; i++) {
const VERTEX_MASK = 0x3ff; // 10 bits
const VERTEX_MSB = 0x200; // bit 9
const VERTEX_LOW = 0x1ff; // bits 0 - 8
const dwords = new Uint32Array(2);
// Read the vertex data
const dword = reader.readUInt32();
dwords[0] = dword;
const xBytes = (dword >> 0x00) & VERTEX_MASK;
const yBytes = (dword >> 0x0a) & VERTEX_MASK;
const zBytes = (dword >> 0x14) & VERTEX_MASK;
// Decode the vertex data
const xHigh = (xBytes & VERTEX_MSB) * -1;
const xLow = xBytes & VERTEX_LOW;
const yHigh = (yBytes & VERTEX_MSB) * -1;
const yLow = yBytes & VERTEX_LOW;
const zHigh = (zBytes & VERTEX_MSB) * -1;
const zLow = zBytes & VERTEX_LOW;
const x = xHigh + xLow
const y = yHigh + yLow
const z = zHigh + zLow
const vec3 = new Vector3(x, y, z);
vec3.multiplyScalar(SCALE);
vec3.applyMatrix4(ROT);
// Encode the vertex data
const v = vec3.clone();
v.applyMatrix4(ROT);
v.multiplyScalar(RESTORE);
v.x = Math.round(v.x)
v.y = Math.round(v.y)
v.z = Math.round(v.z)
v.x === -0 ? v.x = 0 : v.x = v.x;
v.y === -0 ? v.y = 0 : v.y = v.y;
v.z === -0 ? v.z = 0 : v.z = v.z;
const encodedx = encodeVertexBits(v.x);
const encodedy = encodeVertexBits(v.y);
const encodedz = encodeVertexBits(v.z);
// Check that the re-encoded vertex data matches the original
expect(encodedx).toEqual(xBytes);
expect(encodedy).toEqual(yBytes);
expect(encodedz).toEqual(zBytes);
// Check that the re-encoded vertex data matches the original
dwords[1] = encodedx | (encodedy << 0x0a) | (encodedz << 0x14)
expect(dwordString(dwords[1])).toEqual(dwordString(dwords[0]));
}
});
});
test('Re-encoding the tri read from the helmet', () => {
const file = readFileSync(`./bin/PL00P000.BIN`);
const dat = file.subarray(0x30, 0x30 + 0x2b40);
const { buffer } = Buffer.from(dat);
const reader = new ByteReader(buffer as ArrayBuffer);
const FACE_MASK = 0x7f;
const PIXEL_TO_FLOAT_RATIO = 0.00390625;
const PIXEL_ADJUSTMEST = 0.001953125;
buster.map((mesh) => {
const { triOfs, triCount } = mesh;
reader.seek(triOfs)
for (let i = 0; i < triCount; i++) {
const au = reader.readUInt8();
const av = reader.readUInt8();
const bu = reader.readUInt8();
const bv = reader.readUInt8();
const cu = reader.readUInt8();
const cv = reader.readUInt8();
reader.seekRel(2);
const dword = reader.readUInt32();
const materialIndex = ((dword >> 28) & 0x3);
const indexA = (dword >> 0x00) & FACE_MASK;
const indexB = (dword >> 0x07) & FACE_MASK;
const indexC = (dword >> 0x0e) & FACE_MASK;
const a = {
materialIndex,
index: indexA,
u: au * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
v: av * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
}
const b = {
materialIndex,
index: indexB,
u: bu * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
v: bv * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
}
const c = {
materialIndex,
index: indexC,
u: cu * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
v: cv * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
}
expect(Math.floor((a.u - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(au);
expect(Math.floor((a.v - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(av);
expect(Math.floor((b.u - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(bu);
expect(Math.floor((b.v - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(bv);
expect(Math.floor((c.u - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(cu);
expect(Math.floor((c.v - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(cv);
expect(indexA | (indexB << 7) | (indexC << 14) | (materialIndex << 28)).toEqual(dword);
}
});
});
test('Re-encoding the quad read from the helmet', () => {
const file = readFileSync(`./bin/PL00P000.BIN`);
const dat = file.subarray(0x30, 0x30 + 0x2b40);
const { buffer } = Buffer.from(dat);
const reader = new ByteReader(buffer as ArrayBuffer);
const FACE_MASK = 0x7f;
const PIXEL_TO_FLOAT_RATIO = 0.00390625;
const PIXEL_ADJUSTMEST = 0.001953125;
buster.map((mesh) => {
const { quadOfs, quadCount } = mesh;
reader.seek(quadOfs)
for (let i = 0; i < quadCount; i++) {
const au = reader.readUInt8();
const av = reader.readUInt8();
const bu = reader.readUInt8();
const bv = reader.readUInt8();
const cu = reader.readUInt8();
const cv = reader.readUInt8();
const du = reader.readUInt8();
const dv = reader.readUInt8();
const dword = reader.readUInt32();
const materialIndex = ((dword >> 28) & 0x3);
const indexA = dword & FACE_MASK;
const indexB = (dword >> 7) & FACE_MASK;
const indexC = (dword >> 14) & FACE_MASK;
const indexD = (dword >> 21) & FACE_MASK;
const a = {
materialIndex,
index: indexA,
u: au * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
v: av * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
}
const b = {
materialIndex,
index: indexB,
u: bu * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
v: bv * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
}
const c = {
materialIndex,
index: indexC,
u: cu * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
v: cv * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
}
const d = {
materialIndex,
index: indexC,
u: du * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
v: dv * PIXEL_TO_FLOAT_RATIO + PIXEL_ADJUSTMEST,
}
expect(Math.floor((a.u - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(au);
expect(Math.floor((a.v - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(av);
expect(Math.floor((b.u - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(bu);
expect(Math.floor((b.v - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(bv);
expect(Math.floor((c.u - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(cu);
expect(Math.floor((c.v - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(cv);
expect(Math.floor((d.u - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(du);
expect(Math.floor((d.v - PIXEL_ADJUSTMEST) / PIXEL_TO_FLOAT_RATIO)).toEqual(dv);
expect(indexA | (indexB << 7) | (indexC << 14) | (indexD << 21) | (materialIndex << 28)).toEqual(dword);
}
});
});