From 335a31a61df57d3cc300c1c9aff0e08ff81f0abb Mon Sep 17 00:00:00 2001 From: epoch Date: Tue, 20 Mar 2018 23:54:50 -0500 Subject: added anonet_map.sh example and helper script for it xcmd.sh. and a NOTES file. --- NOTES | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 NOTES (limited to 'NOTES') diff --git a/NOTES b/NOTES new file mode 100644 index 0000000..7bab329 --- /dev/null +++ b/NOTES @@ -0,0 +1,57 @@ +this may not be what actually happens, but this is what I'd like: + +x and z are floor. + +y is up and down. + +yr rotation 0 is facing east. because that's what rotation 0 is in cartesian coordinates. +yr is yaw +xr is pitch +zr is roll + +the rotations need to be within the range: 0 <= r < 360 (so modulo 360 should work) + +minimap: view from above + +z? + | + | + | + | +-x --------+-------- +x + | + | + | + | + -z? +the reason the minimap has positive x being down is so that camera view at rotation 0 is with +positive x to the right so 2D vector graphics don't need any dimensions flipped + +camera view: facing rotation 0 + +y + | + | + | + | +-x --------+-------- +x + | + | + | + | + -y + +increasing yr causes rotation counter-clockwise on the minimap. (around y axis) + + +this is what minetest does. I guess I'll do this. + +camera angle 0 is north. +north is +Z +south is -Z +west is -X +east is +X +up is +Y +down is -Y + +there is no angle 0 actually. 0 < angle <= 360 + +I guess I should use yaw. -- cgit v1.2.3