KSPCurveBuilder

A standalone Windows desktop application for editing and visualizing float curves, with support for saving and loading custom presets.

Based on Amazing Curve Editor by sarbian (c)2015 (https://github.com/sarbian)

Features

• Visual Curve Editing: Interactive graph with pan and zoom controls, now with cursor-aware zoom centering and hover tooltips.
• Direct Point Manipulation: Edit curve keys by typing in cells, click-dragging on cells (with Shift/Ctrl for +/- speed control), or dragging points directly on the graph. Right-click graph to add new points.
• Preset Management:
  • Built-in curve presets (Default, Linear, Ease In, Ease Out, Smooth Start).
  • Save, load, rename, and delete custom user presets.
• Data Portability: Copy and paste curve data as plain-text key strings for easy sharing.
• Tangent Smoothing: One-click button to automatically smooth curve tangents.
• Auto-Sort: Automatic sorting by time when enabled (default: on).
• Undo/Redo: Full history tracking for all editing operations.
• Enhanced Error Handling: User-friendly message boxes for validation failures.

Prerequisites

• .NET 10 Desktop Runtime (x64) or later.
• Windows 10/11.

Getting Started

Installation

1. Download the latest KSPCurveBuilder.zip from the Releases page.
2. Extract the ZIP file to a folder of your choice.
3. Run KSPCurveBuilder.exe.

Usage Guide

Basic Editing

1. Add Points: Click the "Add Node" button to insert a new key.
2. Edit Points: Modify values directly in the data grid or click and drag on cells vertically to smoothly drag values up/down.
3. Delete Points: Click the "X" button on a row in the data grid.
4. Pan Graph: Click and drag on the graph view.
5. Zoom Graph: Mouse-wheel zooms the graph view, click "Reset Zoom" to reset.

Working with Presets

• Load a Preset: Select a curve from the "Preset" dropdown menu.
• Save a Preset: Modify a curve, enter a name in the textbox above the dropdown, and click "Save".

Copy/Paste Curves

• Copy: The textbox at the bottom shows the curve data as key strings. Click the "Copy" button to copy this text.
• Paste: Pastes valid key data from the clipboard into the editor(eg. from ksp config files)

License and Attribution

This project is released under the GNU General Public License, version 2 (GPL-2.0).

Copyright Notice:

• Original concept and foundational code for KSPCurveBuilder based on Amazing Curve Editor © 2015 sarbian (https://github.com/sarbian).
• Modifications, reimplementation, and new code © 2026 DGerry83(https://github.com/DGerry83).

This standalone application is a significant reimplementation and extension of those original ideas.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html or the LICENSE file in this repository.