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Linear Interpolation(선형 보간법)
- 보간법(Interpolation) : 함수의, 둘 이상의 변숫값에 대한 함숫값을 알고, 그것들 사이의 임의의 변숫값에 대한 함숫값 내지는 그 근삿값을 구하는 계산법 - Oxford Languages
1D Linear Interpolation

- What is the function, f(t), such that
- 0≤t≤1f(0)=1f(1)=5?
- If f(t) is a Linear Equation,
- f(t)=at+b
- 2 Unknowns, 2 Equations
- 1=a·0+b5=a·1+b
- ∴a=4,b=1f(t)=4t+1

- f(0.5)=1+4×0.5=3
Vector Linear Interpolation

- f(t)=p+t(q−p)
Key-Framing
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Interpolation of scale and rotation?
- Scale Linear Interpolation?

- Rotation Linear Interpolation?

Practice: Linear Interpolation
- Set 6 key positions.
- Animate your plane to fly through 6 key positions by using linear interpolation.

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