incidence geometry Flashcards

1
Q

What is the explicit form for a line doing?

A

generating points

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2
Q

What is the implicit form for a line doing

A

incidence checking. (checking if a point is on the line)

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3
Q

explicit line representation

A
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4
Q

implicit line representation

A
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5
Q

explicit plane representation

A
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6
Q

implicit plane representation

A
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7
Q

explicit sphere representation

A
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8
Q

implicit sphere representation

A
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9
Q

How can i compute an intersection with an explicit and an implicit form?

A

insert explicit form into inplicit form.

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10
Q

How can i compute an intersection with two explicit forms?

A

set the two form equal

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11
Q

line plane intersection

A
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12
Q

at the line plane intersections, what is if n^T * d = 0

A

It means that either the line is inside the plane or parallel to the plane.

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13
Q

line sphere intersection

A
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14
Q

alternative line sphere intersection

A
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15
Q

line triangle intersection

A
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16
Q

check if a point p is insid a triangle with barycentric coordinates?

A
17
Q

better line triangle intersection

A
18
Q

line line intersection

A

build an LSE with d_0^T * v and d_1^T * v and solve for s and t

19
Q

plane plane intersection

A
20
Q

plane plane plane intersection

A
21
Q

What is a half space?

A
22
Q

when is a point in the halfspace?

A
23
Q

how to calculate if a point is in halfspace in d-dimensional spaces?

A