DeltaSeconds()

const Math::Types::Fxp & SRL::Timer::DeltaSeconds ( )

inlinestaticnoexcept

Frame delta time in seconds (fixed-point 16.16).

Pre-calculated each frame by Core::Synchronize(). Represents the time elapsed between the current frame and the previous frame, in seconds.

Range:

• Typical 60fps: ~0.0167 seconds (16.7ms)
• Typical 30fps: ~0.0333 seconds (33.3ms)
• Fxp limit: 32767 seconds (~9.1 hours)

Hardware vs Fxp Limit:

The hardware timer can track up to ~673 days, but DeltaSeconds returns Fxp which has a hard limit of 32767. For game frames this is never an issue.

Usage:

Use for frame-rate independent animation, physics updates, and game logic. Multiply by velocity values to get distance traveled this frame.

// Move object at constant speed regardless of frame rate
Fxp speed = 100.0;  // 100 units per second
position = position + speed * Timer::DeltaSeconds();

See also

DeltaMilliseconds() for millisecond precision