Some documentation

doc/jump/README.txt

@@ -0,0 +1,53 @@
+Here's the player jumping, at 30fps.
+I wanna replicate the arc pretty closely, so here's the numbers I got from the pictures (roughly
+counted pixels, I didn't measure scientifically):
+
+FRAME	Y
+0	6
+1	7
+2	2
+3	6
+4	3
+5	2
+6	3
+7	1
+8	0
+9	0
+10	-2
+11	0
+12	-2
+13	-2
+14	-2
+15	-4
+16	-4
+17	-3
+18	-4
+
+so the jump total raises the player up by ~30px.
+based on this guesswork I'm gonna smooth it out to:
+
+FRAME	Y
+0	6
+1	6
+2	2
+3	6
+4	3
+5	3
+6	3
+7	1
+8	0
+9	0
+10	-2
+11	0
+12	-2
+13	-2
+14	-2
+15	-4
+16	-4
+17	-4
+18	-4
+
+same value, raises up player by 30px
+SAM_FALLSPEED is 4, so after frame 16 the jump is officially done.
+honestly I'm pretty confident in the fact that my counting was off (and maybe bad framerate), but
+oh well. maybe this'll feel natural enough.