Draw the curve.
Watch the chapter follow.
A visual arc editor for the emotional shape of every chapter. Drop keyframes, name the moments — then let the engine write into them.
How it works
the curveDrop points. Name the emotion.
Place keyframes at any beat in the chapter. Each keyframe has a position (the intensity value) and a mood label — "creeping dread", "quiet triumph", "numb dissociation". The curve is drawn between your keyframes.
You're not writing sentences. You're drawing the emotional shape of a chapter — and the generation engine lives inside that shape.
The engine reads the curve.
When a chapter is generated, the engine receives the trajectory as context. Scene pacing, sentence rhythm, word choice, the types of details the POV character notices — all of it bends toward the emotional intensity you drew.
A flat valley reads as numbness. A sharp peak reads as overwhelm. A slow descent reads as loss. Draw what you mean; the prose will mean it too.
Use cases
how writers use itPer-chapter curves
The most common use: draw a unique curve for each chapter, reflecting its specific emotional story. A tense interrogation scene. A quiet reconciliation. A chapter that starts calm and ends in chaos.
Arc-level trajectories
Zoom out. Draw a trajectory for a whole arc — five, ten, twenty chapters — and let each chapter's curve be derived from its position on the larger arc. Build toward a climax over many chapters.
Mood presets
Not sure where to start? Apply a named preset — "three-act tension", "dark night of the soul", "comedy of errors" — then adjust. Presets are the starting shape; your keyframe edits are the refinement.
Regenerate with a new curve
Regenerate the same chapter with a different curve and compare. Same events, different emotional shape. This is how you find the version of a scene that says what you mean — by drawing it first.
Works best alongside
related featuresDraw your first curve
adventurer planMood Trajectories are available from the Adventurer plan. Start with a free account, build your world, then upgrade when you're ready to steer the feeling.