step_simulation
Advance physics simulations by specified timesteps to calculate positions, velocities, and collision states of rigid bodies.
Instructions
Step the simulation forward in time.
Advances the physics simulation by running the integrator for N steps.
Returns the complete state of all bodies after stepping.
Args:
sim_id: Simulation ID
steps: Number of timesteps to simulate. Default 1.
Example: steps=600 with dt=0.016 = 9.6 seconds of simulation
dt: Optional timestep override (seconds). If None, uses config default.
Returns:
SimulationStepResponse containing:
- sim_id: Simulation identifier
- time: Current simulation time in seconds
- bodies: List of all body states with positions, velocities, contacts
Tips for LLMs:
- Each body state includes position, orientation (quaternion), velocities
- contacts array shows active collisions with impulse magnitudes
- For real-time preview: steps=1, call repeatedly
- For final result: steps=1000+, call once
- Large step counts may timeout - limit to ~10,000 steps per call
Example:
# Simulate 10 seconds at 60 FPS
result = await step_simulation(
sim_id=sim_id,
steps=600 # 600 steps × 0.016s = 9.6s
)
for body in result.bodies:
print(f"{body.id}: position={body.position}")Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| sim_id | Yes | ||
| steps | No | ||
| dt | No |