Vocab #4

• Displacement Mapping:  which is used to displace a free-form surface, polygon, or subdivision surface at each point in the direction of the local normal. 
  
• Bump Mapping:  Bump mapping is used to add detail to an image without increasing the number of polygons.
  
• Rendering: Creating an image from a model. 
  
• Alpha Channel: Combining an image with a background to create the appearance of transparency.
  
   
• NURBS vs Polygon: NURBS - the shape of the object is defined mathematically.
  
  Polygon - defined by its corners (vertices) and the straight lines between them (edges)
  
• Tiling: laying tiles 
  
• Skinning: Putting skin on a animated character
  
• Aperture: A hole, gap, or slit. 
  
• Shutter Speed:  Is the unit of measurement which determines how long shutter remains open as the picture is taken.
  
• Focal Length: The distance between the center of a lens or curved mirror and its focus.
  
  
  
  
  
• Dolly: The view of where the camera is focused on. 
  
• Pan: The rotation of the camera.
  
• Roll Aspect Ratio:  Is the ratio of the width of a shape to its height.