Geometric Graphics Flashcards
What are lines in geometric programs?
a pair of end-point locations
What are lines in pixel graphic programs?
a group of pixels
how are lines determined in geometric programs?
a computer algorithm computes which pixels should represent the line
what happens when you zoom an image in a geometric program?
pixels are redrawn mathematically to match the original shape.
first the grid is scaled up, and then the pixels are computed on the new grid.
what happens when you zoom an image in a pixel graphics program?
pixels are simply replicated at the zoomed scale.
what are bezier curves?
irregular curves used everywhere
are Bézier curves regular or irregular and why
irregular since the differ from standard shapes we are used to seeing
why and how are Bézier curves used?
used to create irregular paths by setting anchor points and defining the curve
what are anchor points?
points where curve segments connect
what are the three types of anchor points?
corner, smooth and symmetric
what is a corner anchor point?
a sharp corner where incoming and outgoing directions are different
what is a smooth anchor point?
a corner where incoming and outgoing directions are the same.
what is a symmetric anchor point?
a smooth anchor point where the direction lines are the same length
what do direction lines do?
they determine a curve’s direction at an anchor point.
what are direction lines?
lines tangent to the curve at an anchor point.
