Scaling an animation in Maya's Graph Editor involves selecting the relevant keyframes and then using the scaling tools within the editor to adjust their timing and values. Here's a breakdown of the process:
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Open the Graph Editor: Go to Window > Animation Editors > Graph Editor.
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Select the Curves: In the Graph Editor, select the animation curves you want to scale. These curves represent the properties you've animated (e.g., Translate X, Rotate Y). You can select multiple curves simultaneously.
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Choose the Region Tool: In the Graph Editor toolbar, select the Region Tool. It typically looks like a square selection box.
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Select Keyframes: In the graph view area, drag the Region Tool to select the range of keyframes you want to scale. This will create a bounding box around the selected keyframes.
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Scale the Keyframes: You have two primary ways to scale:
- Time Scaling:
- Drag the handles on the sides of the selection box to compress or expand the time between the selected keyframes. Dragging inward compresses the animation; dragging outward expands it. This affects the timing of the animation.
- Value Scaling:
- Drag the handles on the top or bottom of the selection box to scale the values of the selected keyframes. Dragging upward increases the values; dragging downward decreases them. This affects the intensity or range of the animation.
- Time Scaling:
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Moving the Selected Region: You can drag the whole selected box to move the entire region of keyframes in time and/or value.
Tips for Scaling Animation in the Graph Editor:
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Pivot Point: Be aware of the scaling's pivot point. By default, it scales from the center of your selection. You might need to move keyframes manually before or after scaling for more precise control.
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Constraints: Consider any constraints or relationships in your scene. Scaling one curve might affect others.
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Undo Often: If you make a mistake, don't hesitate to use Edit > Undo.
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Absolute vs. Relative Scaling: The Graph Editor primarily offers a form of relative scaling. The scaling amount is relative to the center of the selected region. For absolute scaling (scaling by a specific numerical factor), you might consider using MEL scripting or Python scripting within Maya.
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Keyframe Tangents: Be mindful of how scaling affects the tangents of your keyframes. You might need to adjust the tangents manually to maintain smooth transitions.