3D Modelling Commands Flashcards
Explain what Extrude is?
A solid created by extruding a closed line/shape to a given height/depth (with or without a taper).
Explain what Revolve is?
A solid created by revolving a profile line/shape around an axis of revolution (can be revolved a full 360 deg or 360 deg).
Explain what Loft is?
Surface or solid created between two or more entities (Rail curves can be used to alter form of lofted geometry).
Explain what Sweep is?
Solid created by extruding along a path (more than one profile shape can be lofted to achieve a variable profile/section).
Explain what Union/add is?
Allows the user to create a composite solid by adding two or more volumes together.
Explain what intersection is?
Allows the user to create a composite solid from the common volume of two or more over lapping solids. Intersection removes the non-overlapping portions and creates a composite solid from the common volume.
Explain what subtraction is?
Allows the user to create a composite solid by subtracting two or more volumes from one another.
Explain what a solid primitive is?
A solid primitive is any standard 3D shape e.g Box, sphere, cylinder, cone, wedge, torus which is stored in a library and can be manipulated / changed / edited by the common volume.
Explain what surface revolution is?
A surface of revolution is a line or series of lines revolved about an axis leaving only a surface shape to the 3D item.
What are the 4 Types of lighting?
- Direct (Distance)
- Spot Light
- Omni Light
- Ambient Light
Describe what a Direct (distance) light is?
A distant light emits uniform parallel light rays in one direction only. You specify a FROM and TO point anywhere in the view port to define the direction of the light, they affect the whole scene but does not diminidh over a distance.
Describe what a spot light is?
It originates from a single point, and spreads outwards in a coned shape and direction. The central brighter circular area is called its Hotspot and the circular are outside of this where the light level drops off is called the falloff.
Describe what a Omni light is?
An omni light emits light from a point source outwards in every direction. Intensity and falloff can be useful for lighting interior scenes.
Describe what Ambient light is?
An ambient light source represents a fixed-intensity and fixed-colour light source that affects all objects in the scene equally. Upon rendering, all object in the scene are brightened with the specified intensity and colour. This type of light source is mainly used to provide the scene with the basic view of the diferent objects in it.
When describing the steps of modelling a component part you should be :
Clear and straight to the point and should always use the correct and accurate terminology.
