feat(rapier2d): 新增Rapier2D WASM绑定包

packages/rapier2d/scripts/gen-src.mjs

@@ -0,0 +1,125 @@
+/**
+ * Generate 2D-specific source code from rapier.js source.
+ * 从 rapier.js 源码生成 2D 专用代码。
+ *
+ * This script:
+ * 1. Copies TypeScript source from rapier.js/src.ts
+ * 2. Removes #if DIM3 ... #endif blocks (keeps only 2D code)
+ * 3. Overwrites raw.ts and init.ts with 2D-specific versions
+ */
+
+import { readFileSync, writeFileSync, readdirSync, mkdirSync, cpSync, existsSync, renameSync } from 'fs';
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const packageRoot = join(__dirname, '..');
+const rapierRoot = join(packageRoot, '..', '..', 'thirdparty', 'rapier.js');
+const srcTsDir = join(rapierRoot, 'src.ts');
+const src2dDir = join(rapierRoot, 'rapier-compat', 'src2d');
+const outputDir = join(packageRoot, 'src');
+
+// Check if rapier.js exists
+if (!existsSync(srcTsDir)) {
+    console.error(`Error: rapier.js source not found at ${rapierRoot}`);
+    console.error('Please clone https://github.com/esengine/rapier.js.git to thirdparty/rapier.js');
+    process.exit(1);
+}
+
+/**
+ * Remove #if DIM3 ... #endif blocks from source code
+ */
+function removeDim3Blocks(content) {
+    // Remove lines between #if DIM3 and #endif (inclusive)
+    const lines = content.split('\n');
+    const result = [];
+    let skipDepth = 0;
+
+    for (const line of lines) {
+        const trimmed = line.trim();
+
+        if (trimmed.startsWith('//#if DIM3') || trimmed.startsWith('// #if DIM3')) {
+            skipDepth++;
+            continue;
+        }
+
+        if (skipDepth > 0 && (trimmed.startsWith('//#endif') || trimmed.startsWith('// #endif'))) {
+            skipDepth--;
+            continue;
+        }
+
+        if (skipDepth === 0) {
+            // Also remove #if DIM2 and its #endif (but keep the content)
+            if (trimmed.startsWith('//#if DIM2') || trimmed.startsWith('// #if DIM2')) {
+                continue;
+            }
+            if (trimmed.startsWith('//#endif') || trimmed.startsWith('// #endif')) {
+                continue;
+            }
+            result.push(line);
+        }
+    }
+
+    return result.join('\n');
+}
+
+/**
+ * Process a single TypeScript file
+ */
+function processFile(srcPath, destPath) {
+    const content = readFileSync(srcPath, 'utf-8');
+    const processed = removeDim3Blocks(content);
+    writeFileSync(destPath, processed);
+}
+
+/**
+ * Recursively copy and process directory
+ */
+function processDirectory(srcDir, destDir) {
+    mkdirSync(destDir, { recursive: true });
+
+    const entries = readdirSync(srcDir, { withFileTypes: true });
+
+    for (const entry of entries) {
+        const srcPath = join(srcDir, entry.name);
+        const destPath = join(destDir, entry.name);
+
+        if (entry.isDirectory()) {
+            processDirectory(srcPath, destPath);
+        } else if (entry.name.endsWith('.ts')) {
+            processFile(srcPath, destPath);
+            console.log(`Processed: ${entry.name}`);
+        }
+    }
+}
+
+// Main
+console.log('Generating 2D source code...');
+console.log(`Source: ${srcTsDir}`);
+console.log(`Output: ${outputDir}`);
+
+// Step 1: Copy and process src.ts directory
+processDirectory(srcTsDir, outputDir);
+
+// Step 2: Overwrite with 2D-specific files (raw.ts, init.ts)
+if (existsSync(src2dDir)) {
+    const entries = readdirSync(src2dDir, { withFileTypes: true });
+    for (const entry of entries) {
+        if (entry.isFile() && entry.name.endsWith('.ts')) {
+            const srcPath = join(src2dDir, entry.name);
+            const destPath = join(outputDir, entry.name);
+            cpSync(srcPath, destPath);
+            console.log(`Overwrote: ${entry.name} (2D-specific)`);
+        }
+    }
+}
+
+// Step 3: Rename rapier.ts to index.ts
+const rapierTs = join(outputDir, 'rapier.ts');
+const indexTs = join(outputDir, 'index.ts');
+if (existsSync(rapierTs)) {
+    renameSync(rapierTs, indexTs);
+    console.log('Renamed: rapier.ts -> index.ts');
+}
+
+console.log('Done!');