RapidSurf automatically converts quad-dominant meshes into smooth, tangent-continuous B-spline surface patches. This powerful reverse engineering capability transforms polygon models from 3D scanning, mesh modeling software, or other sources into editable parametric surfaces suitable for manufacturing and further CAD operations.

• ✓ Automatic Topology Analysis: Intelligent detection and processing of quad-dominant mesh structure
• ✓ G1 Continuity: Tangent-continuous transitions between adjacent surface patches
• ✓ High-Quality Fitting: Precise surface approximation with minimal deviation from original mesh
• ✓ Zebra Stripe Analysis: Built-in quality verification to ensure smooth, fair surfaces

Import OBJ/STL Files

Load triangle and quad meshes from industry-standard OBJ and STL file formats for further processing

Mesh from Surface

Generate high-quality meshes from Class-A NURBS surfaces with adaptive tessellation and curvature control

Show/Hide Vertices

Toggle vertex visibility for cleaner visualization and easier selection in complex meshes

Select & Smooth Vertices

Interactive vertex selection with advanced smoothing for local mesh refinement and quality improvement

Smooth Entire Mesh

Apply global advanced smoothing to entire mesh with iteration control for surface fairness optimization

Line

Create precise straight lines with start/end point or direction vector specification

Circle

Full circles with center-radius definition or three-point construction

Arc

Circular arcs with center-radius-angle or three-point methods

Ellipse

Elliptical curves with major/minor axis control and rotation

Bezier Curve

Polynomial Bezier curves with interactive control point manipulation and degree control

B-spline Curve

Industry-standard B-spline curves with local control, knot vector editing, and degree specification

NURBS Curve

Non-uniform rational B-splines with weight control for representing exact conics and complex shapes

Interpolate Through Points

Create smooth curves that pass exactly through specified point sets with tangent continuity

Fit Curve to Points

Best-fit curve approximation with tolerance control for noisy or dense point data

Offset Curve

Create parallel offset curves at specified distances with corner handling options

Extend Curve

Extend curve endpoints with linear, circular, or natural extension methods

Blend Curves

Create smooth G1/G2 continuous blend curves between two existing curves

ISO Parametric Curves

Extract constant-parameter (U or V) curves from surface parameterization

Boundary Curves

Extract edge boundary curves from surface trim loops and parametric bounds

Section Curves

Create section curves by intersecting surfaces with cutting planes at specified positions

Intersection Curves

Compute intersection curves between two surfaces with adaptive tessellation

Plane

Planar surfaces with origin, normal vector, and size specification

Sphere

Spherical surfaces with center, radius, and parameterization control

Cylinder

Cylindrical surfaces with axis, radius, and height specification

Cone

Conical surfaces with apex, axis, base radius, and height control

Interpolate Through Points

Create smooth surfaces that pass exactly through specified 3D point sets

Constrained Fit

Surface approximation that interpolates specified points while fitting remaining point cloud data

Best Fit Surface

Advanced point cloud surfacing with adaptive control point placement and fairness optimization

Extrude Surface

Linear extrusion of profile curves along direction vectors with distance control

Revolve Surface

Surfaces of revolution from profile curves with axis specification and angle range

Pipe Surface

Constant or variable radius pipe surfaces swept along spine curves with cross-section control

Loft Surface

Smooth blending between multiple profile curves with tangent continuity and guide curve support

Ruled Surface

Connect two boundary curves with straight ruling lines to create developable surfaces

Sweep Surface

Sweep profile curves along one or more path curves with scaling and rotation control

Through Curve Network

Create smooth surfaces through intersecting U and V curve networks with optimized fairness

Coons Patch

Classic Coons patch with four boundary curves and optional G1/G2 continuity constraints

N-Sided Fill Surface

Fill N-sided boundary regions with smooth, high-quality surfaces for complex topology modeling

G2 Blend Surface

Curvature-continuous blending between two NURBS surfaces with automatic position, tangent, and curvature matching at both boundaries, plus user-adjustable tangent scaling for precise control

Rolling Ball Blend

Constant radius fillet surfaces using rolling ball methodology with multiple ball radius support

Split Curve

Split curves at parameter values or intersection points into separate segments

Trim Curve

Trim curves with boundaries or cutting objects with parameter range specification

Extend Curve

Extend curve endpoints using linear, arc, or smooth continuation methods

Split Surface

Split surfaces with curves or isoparametric lines into multiple surface patches

Trim Surface

Create trimmed surfaces with boundary curves defining visible/invisible regions

Extend Surface

Extend surface edges with linear, circular, or smooth continuation methods

Control Point Editing and Local Transformation

Comprehensive curve and surface modification through direct manipulation. Control Point Editing: Directly manipulate control points by left-clicking to select and right-click dragging to move them in 3D space for intuitive shape refinement. Local Transformation: Perform precise Move, Rotate, and Scale operations on selected curves and surfaces using interactive local coordinate frames with axis-constrained transformations for accurate geometric positioning and modification.

Curvature Comb

Visual curvature analysis with comb display showing curvature magnitude and distribution

Zebra Stripe Analysis

Reflection-based surface quality analysis with adjustable stripe patterns and lighting