>>280
#include "hspext.as"
screen 2, 300, 100, 4: title "Config"
pos 5, 8: mes "初速:": pos 50, 5: input speed, 215, 25: pos 270, 8: mes "m/s"
pos 5, 38: mes "角度:": pos 50, 35: input angle, 210, 25: pos 265, 38: mes "/255"
pos 5, 70: objsize 290, 25: button "Start", *start
gsel 0: stop
*start
emsin sin, angle: emsin cos, angle
mx = speed * sin / 255: my = speed * cos / 255
x = 0: y = 480000: pos x/1000, y/1000
repeat
x += mx: y -= my: my -= 10
line x / 1000, y / 1000
wait 10
loop
stop

こんな感じかぇ・・・？