This is how lines are defined in parametric equations! Essentially just a parametric equation of a slowly scaled up vector.

briana-jin-zhang

The equation for lines are the same format, but there is a slight difference here in that you can't have light "behind" the origin, whereas a light is infinite. This is denoted by how $$0 \leq t < \infty$$.

briana-jin-zhang

I meant $0 \leq t < \infty$ :/ latex not doing what I want again

kbiesiadecki141

Are rays used in other applications besides graphics? Because it’s essentially a vector with an extra dimension(s) for its origin point. Also how are these represented with homogenous coords

This is how lines are defined in parametric equations! Essentially just a parametric equation of a slowly scaled up vector.

The equation for lines are the same format, but there is a slight difference here in that you can't have light "behind" the origin, whereas a light is infinite. This is denoted by how $$0 \leq t < \infty$$.

I meant $0 \leq t < \infty$ :/ latex not doing what I want again

Are rays used in other applications besides graphics? Because it’s essentially a vector with an extra dimension(s) for its origin point. Also how are these represented with homogenous coords