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# Scene Binary Format (SCN1)
Binary format for 3D scenes exported from Blender.
## File Layout
- **Extension:** `.bin` or `.scene`
- **Endianness:** Little Endian
- **Structure:** Header + Object Blocks
## Format Specification
```cpp
// Header (16 bytes)
struct Header {
char magic[4]; // "SCN1"
uint32_t num_objects;
uint32_t num_cameras; // Reserved
uint32_t num_lights; // Reserved
};
// Object Block (repeated num_objects times)
struct ObjectBlock {
char name[64]; // UTF-8, null-padded
uint32_t type; // ObjectType enum
vec3 position; // 12 bytes
quat rotation; // 16 bytes (x, y, z, w)
vec3 scale; // 12 bytes
vec4 color; // 16 bytes (r, g, b, a)
uint32_t mesh_len; // Mesh name length (N)
char mesh_name[N]; // If N > 0
float mass;
float restitution;
uint32_t is_static; // 0=Dynamic, 1=Static
};
```
### Object Types
```cpp
enum class ObjectType {
CUBE = 0, SPHERE = 1, PLANE = 2, TORUS = 3,
BOX = 4, SKYBOX = 5, MESH = 6
};
```
## Asset Resolution
Mesh names (e.g., "MESH_CUBE") resolve to runtime `AssetId` via `GetAssetIdByName`.
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