What is 3D Sketch?
A new modeling and rendering system enables users to construct 3D models with an interface that makes no different from sketching by hand which displays models in a sketch-like style, preserving the features of the user’s strokes. This system is called 3D SKETCH. When a sketch can be matched to such a template, then the system can reconstruct a mesh model from the sketch. The system collects information about strokes made and uses this information for your rendering scheme.
A 3D curve sketching is a system that captures some of the affordances of paper and pen for designers that allows them to iterate on concept 3D curve models directly. The system coherently integrates the existing techniques of sketch-based interaction with a number of enhanced features and novel. Novel contributions of the system helps in an axis widget for sketch surface selection, automatic view rotation for improving curve sketch ability and implicitly inferred changes between sketching techniques.
The two ways are there to make 3D sketches. These are Adaptive and Non-Adaptive. 3D sketch is a line in space with 3 degrees of freedom and they can be controlled by dimensions but these dimensions “hard-code” the shape of the sweep. These can be useful in some of the cases like when you have a bent tube of that you know the geometry and have to design around but the most useful and robust technique is to use work geometry to control the sweep.
You can construct a 3D sweep line by following a series of work points. These work points should be defined in space by an axis and a plane, either two intersecting axes or three intersecting planes. If the user constructs a series of work planes and axes which is based off existing geometry the user can these place work points onto these axes and planes to form a “connect-the-dots” framework for the sketch.
There is a useful tip on reducing features by using 3D sketches. It will help you to show how to create a plane at any angle against a curved surface and how you can do it with a minimum number of features.
- Start a 3D sketch and plop 3 points in space with perpendicular lines in between
- Put one point on the bottom edge of the surface
- Add some dimensions to lock things down a little bit
- Exit the sketch
- Insert a Plane (Insert, Reference Geometry, Plane) by selecting the 3 points you created
So, we hope that now you know about the use of 3D sketch and how a single tip can reduce the features.
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