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step() template<typename FirstValueType, typename... RemainingValueTypes> auto step ( int32_t frames ) -> tween_value_t Advances or rewinds the animation by a frame delta. Moves the tween forward (positive) or backward (negative) by the specified number of frames. Clamped to valid frame range. Triggers event::step listeners. Parameters frames Number of frames to move (negative values step backward) Returns Interpolated value at the new frame auto t = tweeny::from(0).to(100).during(100U).build(); t.step(10); // Advance 10 frames (value: 10) t.step(5); // Advance 5 more frames (value: 15) t.step(-3); // Rewind 3 frames (value: 12)