× Dot & Cross
The dot product is just a shadow
Stopped memorising the formula and started picturing one vector's shadow falling on the other. Suddenly the cosine is obvious.
solid
recently, then
- ↻ Rotations & Quaternions
Why quaternions don't gimbal lock
Three days in and I can use them fine, but I still can't picture the fourth component. Writing down what I have so far.
still scribbling - ∿ Interpolation & Easing
Lerp isn't a curve, it's a ruler
Every easing function I'd been writing was really just bending t before handing it to the same straight line.
solid - × Dot & Cross
The cross product refuses both
It points where neither input does. Once that clicked, the right-hand rule stopped feeling like arbitrary trivia.
getting it - ▦ Matrices & Transforms
transform.forward is just the third column
Unity hands you a tidy property, but it's reading straight out of the rotation matrix. Here's which numbers it grabs.
getting it - → Vectors
Normalising, and why I kept forgetting to
Half my movement bugs were one missing .normalized. A note about what length actually costs you.
solid - ∡ Trig for Motion
sin and cos are the same wave, late
One is the other shifted by a quarter turn. Useful the moment you want two things bobbing out of phase.
getting it - ↻ Rotations & Quaternions
Slerp, and when the shortest path isn't
Two rotations, two ways round the sphere. Unity picks one for you and I wanted to know which.
still scribbling