Finding Auxiliary Vanishing Points (Leaving Cert DCG): Flashcards
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Definition of auxiliary vanishing points (AVP)
Definition of auxiliary vanishing points (AVP)
Special reference points for constructing sloped lines accurately in perspective
Why sloped lines need auxiliary vanishing points
Why sloped lines need auxiliary vanishing points
They don't converge to main vanishing points
Common uses of auxiliary vanishing points
Common uses of auxiliary vanishing points
Sloped roofs, ramps, inclined planes, angled surfaces
AVP position for upward-sloping lines from spectator
AVP position for upward-sloping lines from spectator
Above the horizon
AVP position for downward-sloping lines from spectator
AVP position for downward-sloping lines from spectator
Below the horizon
Method 1 for finding AVP
Method 1 for finding AVP
Traditional distance method using measurements from elevation/plan
Method 2 for finding AVP
Method 2 for finding AVP
Alternative method using true angles
Why angle method is preferred over distance method
Why angle method is preferred over distance method
More precise, uses true angles not scaled distances, reduces errors
When to add AVPs in perspective drawing
When to add AVPs in perspective drawing
After establishing main vanishing points
Common AVP placement error
Common AVP placement error
Placing on wrong side of horizon (forgetting up/down rule)