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Implement texture download system and entity parsing tests

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Co-authored-by: MayaTheShy <117858929+MayaTheShy@users.noreply.github.com>
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2025-11-17 00:15:44 +00:00
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docs/ENTITY_TROUBLESHOOTING.md Normal file
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# Entity Troubleshooting Guide
## Overview
This guide helps diagnose issues with entity rendering and reception in Starworld.
## Debug Logging
Starworld provides comprehensive debug logging controlled by environment variables. Enable these to diagnose entity-related issues:
### Available Debug Flags
```bash
# Enable entity packet debugging (shows packet structure and content)
export STARWORLD_DEBUG_ENTITY_PACKETS=1
# Enable entity lifecycle tracking (shows creation/update/deletion)
export STARWORLD_DEBUG_ENTITY_LIFECYCLE=1
# Enable general network packet debugging
export STARWORLD_DEBUG_NETWORK=1
```
### Example Usage
```bash
# Enable all debugging for maximum visibility
export STARWORLD_DEBUG_ENTITY_PACKETS=1
export STARWORLD_DEBUG_ENTITY_LIFECYCLE=1
export STARWORLD_DEBUG_NETWORK=1
# Run with authentication
./build/starworld --auth --overte=127.0.0.1:40104
# Or run in simulation mode to test rendering
export STARWORLD_SIMULATE=1
./build/starworld
```
## Common Issues
### 1. Entities Not Appearing
**Symptoms:**
- Domain connection succeeds
- DomainList packet received
- No EntityData packets received
- No entities visible in VR
**Diagnostic Steps:**
1. **Enable entity debugging:**
```bash
export STARWORLD_DEBUG_ENTITY_PACKETS=1
export STARWORLD_DEBUG_ENTITY_LIFECYCLE=1
./build/starworld --overte=127.0.0.1:40104
```
2. **Check EntityQuery transmission:**
Look for log lines like:
```
[OverteClient] Sent EntityQuery to entity-server (192.168.1.100:40102, 35 bytes, seq=5)
```
3. **Verify EntityServer address:**
The DomainList reply should contain an EntityServer entry:
```
[OverteClient] Assignment client 0: type=0 (EntityServer)
```
4. **Check for EntityData packets:**
Look for:
```
[OverteClient] Received EntityData packet (XXX bytes)
[OverteClient] Entity added: EntityName (id=12345)
```
**Common Causes:**
- **No EntityServer running:** Domain server may not have an entity server configured
- **Anonymous connection limitation:** Some domains restrict entity data for anonymous users
- **Network/firewall issues:** EntityServer may be on a different port/address that's blocked
- **HMAC verification issue:** Server rejecting sourced packets (see NETWORK_PROTOCOL_INVESTIGATION.md)
**Solutions:**
- Try authenticated connection: `./build/starworld --auth`
- Verify domain server has entity-server running
- Check firewall rules for UDP port (typically domain UDP port)
- Test with simulation mode to verify rendering works: `export STARWORLD_SIMULATE=1`
### 2. Entities Received But Not Rendered
**Symptoms:**
- EntityData packets received and logged
- Entity count increases
- No visual models appear in VR
**Diagnostic Steps:**
1. **Check entity counts:**
Look for lifecycle logging:
```
[OverteClient/Lifecycle] Total entities: 5, Update queue: 5
```
2. **Verify entity properties:**
With `STARWORLD_DEBUG_ENTITY_LIFECYCLE=1`:
```
[OverteClient] Entity added: Chair (id=12345)
Type: 3
Position: (1.5, 0.0, -2.0)
Dimensions: (0.5, 0.5, 0.5)
Model: https://example.com/models/chair.glb
```
3. **Check for zero dimensions:**
Entities with zero dimensions are skipped:
```
[bridge/reify] Skipping node 12345 (zero dimensions)
```
4. **Verify model loading:**
Check bridge logs for model loading:
```
[bridge/reify] Loading 3D model for node 12345 from URL: ...
[bridge/reify] Using downloaded model: /home/user/.cache/starworld/models/abc123.glb
```
**Common Causes:**
- **Zero dimensions:** Entity has dimensions (0, 0, 0)
- **Missing primitive models:** Cache directory `~/.cache/starworld/primitives/` is empty
- **Model download failure:** HTTP download failed or URL is invalid
- **Stardust bridge not loaded:** Bridge library failed to load or initialize
**Solutions:**
- Generate primitive models:
```bash
blender --background --python tools/blender_export_simple.py
```
- Check cache directories exist:
```bash
ls -la ~/.cache/starworld/primitives/
ls -la ~/.cache/starworld/models/
```
- Verify bridge is loaded:
```
[StardustBridge] Rust bridge present: libstardust_bridge.so
```
### 3. Connection Drops After 11-18 Seconds
**Symptoms:**
- Initial connection succeeds
- DomainList received
- Connection killed after 11-18 seconds
- Error: "Node killed by domain server (silent node)"
**Cause:**
This is a known HMAC verification issue on the server side. See [docs/NETWORK_PROTOCOL_INVESTIGATION.md](NETWORK_PROTOCOL_INVESTIGATION.md) for detailed analysis.
**Workaround:**
Currently under investigation. The client implementation is correct; the issue is server-side configuration.
### 4. Entity Colors Not Applied
**Symptoms:**
- Entities appear with default/white color
- Entity color logged but not visible
**Cause:**
Color tinting is not yet implemented. The StardustXR asteroids Model element doesn't currently expose material manipulation APIs.
**Current State:**
- Entity colors are parsed from packets ✅
- Colors stored in entity structure ✅
- Colors propagated to Rust bridge ✅
- Colors logged in debug mode ✅
- Colors applied to model materials ❌ (TODO)
**Expected Logs:**
```
[bridge/reify] Node 12345 has color tint: RGBA(1.00, 0.00, 0.00, 1.00) - NOT YET APPLIED
```
### 5. Textures Not Applied
**Symptoms:**
- Entities show model geometry but no textures
- Texture URL logged but not visible
**Current State:**
- Texture URLs parsed from packets ✅
- Texture download system implemented ✅
- HTTP/HTTPS texture downloads cached ✅
- Textures passed to bridge ✅
- Textures applied to materials ❌ (Depends on StardustXR API)
**Expected Logs:**
```
[StardustBridge] Texture downloaded: https://example.com/texture.jpg -> /home/user/.cache/starworld/models/xyz789.jpg
[bridge/reify] Node 12345 has texture URL: /home/user/.cache/starworld/models/xyz789.jpg - NOT YET APPLIED
```
## Testing Entity Rendering
### Simulation Mode
Test entity rendering without connecting to a server:
```bash
export STARWORLD_SIMULATE=1
export STARWORLD_BRIDGE_PATH=/home/runner/work/Starworld/Starworld/bridge/target/release
./build/starworld
```
This creates three test entities:
- Red cube (Box type, 0.2m)
- Green sphere (Sphere type, 0.15m)
- Blue suzanne (Model type, 0.25m)
### Unit Tests
Run the test harness to verify packet parsing:
```bash
cd build
./starworld-tests
```
Expected output:
```
[TEST] Protocol signature hex=eb1600e798dc5e03c755a968dc16b7fc
[TEST] Entity packet structure: 75 bytes
ALL TESTS PASS
```
## Log Analysis
### Successful Entity Reception
```
[OverteClient] Connected to domain server
[OverteClient] DomainList received
[OverteClient] Assignment client 0: type=0 (EntityServer) at 192.168.1.100:40102
[OverteClient] Sent EntityQuery to entity-server (192.168.1.100:40102, 35 bytes, seq=3)
[OverteClient] Received EntityData packet (523 bytes)
[OverteClient] Entity added: Chair (id=12345)
[OverteClient/Lifecycle] Total entities: 1, Update queue: 1
[bridge/reify] Reifying 1 nodes
[bridge/reify] Loading 3D model for node 12345 from URL: https://example.com/chair.glb
[StardustBridge] Model downloaded: https://example.com/chair.glb -> /home/user/.cache/starworld/models/abc123.glb
```
### Failed Entity Reception
```
[OverteClient] Connected to domain server
[OverteClient] DomainList received
[OverteClient] No EntityServer found in assignment clients
[OverteClient] Sent EntityQuery to domain-server (192.168.1.100:40104, 35 bytes, seq=3)
[OverteClient] (No EntityData packets received)
[OverteClient/Lifecycle] Total entities: 0, Update queue: 0
```
## Environment Variables Reference
| Variable | Default | Description |
|----------|---------|-------------|
| `STARWORLD_SIMULATE` | `0` | Enable simulation mode (1=on) |
| `STARWORLD_DEBUG_ENTITY_PACKETS` | `0` | Log entity packet contents |
| `STARWORLD_DEBUG_ENTITY_LIFECYCLE` | `0` | Log entity creation/updates |
| `STARWORLD_DEBUG_NETWORK` | `0` | Log all network packets |
| `STARWORLD_BRIDGE_PATH` | `./bridge/target/debug` | Path to Rust bridge library |
| `OVERTE_UDP_PORT` | from URL | Override UDP domain server port |
## Getting Help
If you encounter issues not covered here:
1. Enable all debug logging
2. Capture full output to a file:
```bash
export STARWORLD_DEBUG_ENTITY_PACKETS=1
export STARWORLD_DEBUG_ENTITY_LIFECYCLE=1
./build/starworld --overte=127.0.0.1:40104 2>&1 | tee debug.log
```
3. Check existing documentation:
- [NETWORK_PROTOCOL_INVESTIGATION.md](NETWORK_PROTOCOL_INVESTIGATION.md) - Connection issues
- [ENTITY_RENDERING_ENHANCEMENTS.md](ENTITY_RENDERING_ENHANCEMENTS.md) - Rendering details
- [DEVELOPER_GUIDE.md](DEVELOPER_GUIDE.md) - Build and development
4. File an issue with:
- Debug log output
- Domain server address/version
- Expected vs actual behavior
- Steps to reproduce

27
src/StardustBridge.cpp
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@@ -229,6 +229,33 @@ bool StardustBridge::setNodeModel(NodeId id, const std::string& modelUrl) {
bool StardustBridge::setNodeTexture(NodeId id, const std::string& textureUrl) {
auto it = m_nodes.find(id);
if (it == m_nodes.end()) return false;
// Check if URL is HTTP(S) - if so, download via ModelCache (also works for textures!)
if (textureUrl.substr(0, 7) == "http://" || textureUrl.substr(0, 8) == "https://") {
// Request download from ModelCache (cache handles all file types)
ModelCache::instance().requestModel(
textureUrl,
[this, id](const std::string& url, bool success, const std::string& localPath) {
if (success && m_fnSetTexture) {
std::cout << "[StardustBridge] Texture downloaded: " << url << " -> " << localPath << std::endl;
m_fnSetTexture(id, localPath.c_str());
} else if (!success) {
std::cerr << "[StardustBridge] Failed to download texture: " << url << std::endl;
}
},
[id](const std::string& url, size_t bytesReceived, size_t bytesTotal) {
// Optional: log download progress
if (bytesTotal > 0 && bytesReceived % 1024 == 0) { // Log every 1KB to reduce spam
float percent = (bytesReceived * 100.0f) / bytesTotal;
std::cout << "[StardustBridge] Downloading texture for node " << id << ": "
<< percent << "% (" << bytesReceived << "/" << bytesTotal << " bytes)" << std::endl;
}
}
);
return true; // Download initiated, will complete asynchronously
}
// Direct URL (file://, data:, etc.) - pass through to bridge
if (m_fnSetTexture) {
return m_fnSetTexture(id, textureUrl.c_str()) == 0;
}

82
tests/TestHarness.cpp
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@@ -92,6 +92,88 @@ int main(){
}
}
// Test 4: Entity packet structure validation
{
// Simulate a simple EntityAdd packet structure:
// [type:u8][id:u64][name:null-terminated][position:3xf32][rotation:4xf32][dimensions:3xf32][model_url:null-terminated][texture_url:null-terminated][color:3xf32][entity_type:u8]
std::vector<uint8_t> entityPacket;
// Packet type (0x10 = ENTITY_ADD)
entityPacket.push_back(0x10);
// Entity ID (uint64): 12345
uint64_t entityId = 12345;
for (int i = 0; i < 8; i++) {
entityPacket.push_back((entityId >> (i * 8)) & 0xFF);
}
// Name: "TestEntity\0"
std::string name = "TestEntity";
entityPacket.insert(entityPacket.end(), name.begin(), name.end());
entityPacket.push_back(0); // null terminator
// Position: (1.0, 2.0, 3.0) as 3 floats
float pos[3] = {1.0f, 2.0f, 3.0f};
for (int i = 0; i < 3; i++) {
uint8_t* bytes = reinterpret_cast<uint8_t*>(&pos[i]);
entityPacket.insert(entityPacket.end(), bytes, bytes + 4);
}
// Rotation: identity quaternion (0,0,0,1) as 4 floats
float rot[4] = {0.0f, 0.0f, 0.0f, 1.0f};
for (int i = 0; i < 4; i++) {
uint8_t* bytes = reinterpret_cast<uint8_t*>(&rot[i]);
entityPacket.insert(entityPacket.end(), bytes, bytes + 4);
}
// Dimensions: (0.5, 0.5, 0.5) as 3 floats
float dims[3] = {0.5f, 0.5f, 0.5f};
for (int i = 0; i < 3; i++) {
uint8_t* bytes = reinterpret_cast<uint8_t*>(&dims[i]);
entityPacket.insert(entityPacket.end(), bytes, bytes + 4);
}
// Model URL: empty
entityPacket.push_back(0);
// Texture URL: empty
entityPacket.push_back(0);
// Color: (1.0, 0.0, 0.0) red as 3 floats
float color[3] = {1.0f, 0.0f, 0.0f};
for (int i = 0; i < 3; i++) {
uint8_t* bytes = reinterpret_cast<uint8_t*>(&color[i]);
entityPacket.insert(entityPacket.end(), bytes, bytes + 4);
}
// Entity type: 1 (Box)
entityPacket.push_back(1);
std::cout << "[TEST] Entity packet structure: " << entityPacket.size() << " bytes" << std::endl;
// Validate minimum size
size_t minExpectedSize = 1 + 8 + 11 + 12 + 16 + 12 + 1 + 1 + 12 + 1; // = 75 bytes
if (entityPacket.size() != minExpectedSize) {
std::cerr << "[FAIL] Entity packet size mismatch: got " << entityPacket.size()
<< " expected " << minExpectedSize << "\n";
++failures;
}
// Validate packet type
if (entityPacket[0] != 0x10) {
std::cerr << "[FAIL] Entity packet type mismatch\n";
++failures;
}
// Validate entity ID
uint64_t readId = 0;
std::memcpy(&readId, &entityPacket[1], 8);
if (readId != entityId) {
std::cerr << "[FAIL] Entity ID mismatch: got " << readId << " expected " << entityId << "\n";
++failures;
}
}
if (failures == 0) {
std::cout << "ALL TESTS PASS" << std::endl;
return 0;