Chapter 11 DME Operations
692
DME Special Effect Operations
Fill blending modes
Specifies the way in which the light is blended with the image.
Mix: Light as if reflected from a mirror. The light can be given a color.
Multiply: Light as if reflected from a dull surface (diffuse reflection).
Relation between test spheres and parallel rays
The following figure shows an example of the effect of parallel rays on a test
sphere.
The direction of a ray is defined by longitude and latitude.
• Longitude: A direction (angle), expressed as a plus value for clockwise
rotation in the plus direction with respect to the X axis of the input picture.
• Latitude: Latitude
The following figure shows the relationships between the longitude and
latitude of parallel rays, input picture, and test sphere.
Radius
Angle
Offset
Angle: Rotation angle
Initial center position
Test sphere
Ray
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