Spline Tools for Unity Splines

Overview Spline Tools adds a powerful Scene View toolbar overlay to Unity's built-in Spline system. Select any GameObject with a SplineContainer and the toolbar appears automatically, giving you instant access to a complete set of spline editing tools. The toolbar is organized into three groups: Tool Buttons that each open a dedicated overlay panel, Toggle Buttons that stay active regardless of the selected tool, and Action Buttons for quick-access to common workflows. Early Access Spline Tools is released as Early Access at a discount price. Features will be added and functionality will change depending on Feedback. Discount Everyone who supported me with any of these assets will get this asset at a discount: - World Building Bundle for MicroVerse - Genesis for MicroVerse - YAPP - Yet Another Prefab Painter Integrations These assets provide integrations for Spline Tools and are available at a discount. If you need them, buy Spline Tools for Unity Splines first, then the others to get the discount: - Spline Mask for Unity Splines Tool Buttons * Flow - Click-drag on surfaces to paint splines freehand. Supports tension control, auto/manual point reduction, extend and replace modes, closed loops, and surface layer filtering. Mesh paint supports painting on a mesh without collider requirement, ideal for Spline Mas. A river scan mode traces downhill paths across Unity Terrain in real time while you drag spline knots. A lake scan mode can be used to create a spline of the terrain contour around a transform's position. * Shape - Generate preset shapes including Line, Rectangle, Rounded Rectangle, Circle, Landscape (Perlin noise) and Race Track (procedural with self-intersection resolution). Pipette buttons pick dimensions from existing splines. Auto Apply for instant feedback. * Create - Derive new splines from existing ones. Create parallel offset copies, spline segments as curbs using curvature criteria, generate bounding box splines around GameObjects, compute the 2D convex hull, create a spline path through a list of selected gameobjects. Optional Align to Surface snapping. * Align - Snap knots to terrain or any surface via raycasting. Flatten along X, Y or Z using the selected knot's local axes. Configurable layer mask, ray distance, height offset and normal alignment. * Smooth - Curvature-aware relaxation that targets sharp corners with configurable iterations, strength and angle threshold. Jitter mode adds controlled randomness to break up uniform paths. * Scale - Expand or contract splines from their centroid. Uniform or per-axis scaling with an axis mask. * Structure - Subdivide, unsubdivide, reduce knots (Ramer-Douglas-Peucker), distribute evenly, distribute at fixed intervals, reverse direction, unroll rotations, and mirror across any axis. * Deform - The deform tool provides mechanisms to change the shape of a selected spline segment. Available are Banking, Looping, Wave, Twist, Hills, Spiral, Cobra Roll, Jump Ramp, Banked Turn, Noise * Object - Copy and paste spline data between SplineContainers. Clear all splines from a container. * Options - Configure the Gizmo visualiser (per-axis normals, spline length, segment distances) and Snap behaviour (ray distance, height offset, normal alignment) from a single panel. Toggle Buttons * Gizmo - Visualise spline normals, total length and segment distances in the Scene View. Each axis can be toggled independently with customizable colours. Stays active with any tool. * Snap - Automatically snap knots to the closest surface while dragging them. Zero overhead when disabled. Action Buttons * Edit Mode - Enter spline edit mode instantly without navigating Unity's dropdown menus. * Draw Spline - Activate Unity's spline creation tool with a single click. * Knot Tool - Click on a curve to insert knots. Hold Ctrl to delete, Shift for free-placement. * Select Tool - Brush-select knots by dragging. Shift-drag to add, Ctrl-drag to remove from the selection. Additional Features * Instant