BRL-CAD is one of the few 3D solid modeling systems that not only support geometry in boundary representation NURBS format but also provide extensive support for robust solid ray tracing of NURBS geometry. Boundary Representationīoundary representation NURBS surface geometry is one of the dominant geometric representation formats in CAD. This screenshot shows a classic "Sphere Flake" model with five levels of recursion, specular reflections, multiple light sources, environment mapping, checkered texture synthesis, ambient occlusion, and soft shadows. Procedural GeometryīRL-CAD provides a comprehensive procedural geometry interface as a means for creating models algorithmically instead of manually. This screenshot shows a model imported from the Rhino3D 3DM file format into BRL-CAD as NURBS boundary representation geometry, visualized via OpenGL. Geometry ConversionĪs shown, a BRL-CAD target description can be converted to a finite element mesh (FEM) using the BRL-CAD g-sat exporter and Cubit from Sandia National Laboratories. The bearing is modeled with a material appearance resembling acrylic glass, and this raytracing result shows reflection, refraction, shadowing, and some caustic effects. The image shown is a BRL-CAD 2D framebuffer screenshot displaying the rendering of a ball bearing.
Raytracing is central to BRL-CAD as a means for performing geometric analysis (e.g., calculating weights and moments of inertia) and for rendering images for visualization purposes. This model was created by students new to BRL-CAD in the span of about 2 weeks, starting from actual measurements in a museum. Shown is a 3D model of a Goliath tracked mine, a German-engineered remote controlled vehicle used during World War II. Solid modeling is distinguished from other forms of geometric modeling by an emphasis on being physically accurate, fully describing 3D space. Solid GeometryīRL-CAD focuses on solid modeling CAD. Let's take a quick look at just some of the high-level features provided by BRL-CAD. One strength of a solid modeling system with integrated high-performance rendering is the ability to showcase some of those features graphically. BRL-CAD has thousands of distinct features that have been developed over a number of decades.
0 kommentar(er)
