November 1, 2018 2 min to read

선형대수학

선형대수학

Math

scale

move

rotation pitch(x axis), yaw(y axis), roll(z axis)

n = normal, l = light vector, h = half vector, v = view $f(l.v) = {F(v,h)G(l,v,h)D(h)\over4(n \cdot l)(n \cdot v))}$

https://datastory1.blogspot.com/2017/11/r-markdown_2.html

숫자가 아닐떄 True,

bool linesegment_vs_plane(float3 p0, float3 p1, float3 pn, out float lerp_val)
{
    float3 u = p1 - p0;
    float D = dot(pn, u);
    float N = -dot(pn, p0);
    
    lerp_val = N / D;
    return !(lerp_val != saturate(lerp_val));
}

D = Direction $D = {ax_1 + by_1 + cz_1 + d \over \sqrt {a^2 + b^2 + c^2}}$

행렬 연산 애니메이션

$\begin{bmatrix} 1 & 0 \\\ 0 & 1 \end{bmatrix} \begin{bmatrix} 1.5 & 0 \\\ 0 & 0.5 \end{bmatrix}$