tetris like movement

[piki]

hello

my question is about how to move object like falling box from the top of the screen and to controll the speed of the falling box(or any other active).how to do do manually movement.
how to do this with valeus? like x_pos=something and then x_pos=something+10 or what ever.

i saw tutorial that showed exacly this situation somewhere, but..i can't find it

anyway, i'll apriciate as usual, any help.
thanks ahead guys.

[RV74]

For free falling movement, we need three parameters: Vx, Vy and G.
Vx and Vy are horizontal and vertical velocity respectively, and G is the gravity constant.

Here're roughly the events make it work

+Always
BOX: Set X position to X("BOX") + Vx of BOX
BOX: Set Y position to Y("BOX") + Vy of BOX
BOX: Add G of BOX to Vy of BOX

+Repeat while Player Move left
BOX: Set Vx to -10

+Repeat while Player Move right
BOX: Set Vx to 10

+(NEG)Repeat while Player Move right
+(NEG)Repeat while Player Move left
BOX: Set Vx to 0



example: http://rv74.homeip.net/tmp/FreeFallingExample.mfa

[piki]

thanks alot mate
also the link for the example works, but i can't open the file..unknown format.

can you make it jpeg or bitmap?

[Ben]

Its not an image... its an MMF program.

[piki]

strange..my pc rec it as photoshop image..let me try.

[piki]

ok thanks.

[piki]

another thing on the way (as usuall)

if i wants an object to upear randomaly(random positions) in the playing erea?

and another thing: how to create space invaders like movement when the invaders moving from right to left?
i can do it easily with path movement, but i wanna do it manualy.
i did something like this: if object is bigger then "number" then object x cordinate=x+2 and the object moving 2 units across the screen, but when it reach the end of the screen i can't make it back like x-2 and i know why..the loop command it to move x+2 every loop, but i dunno how to reset it ,so the object will reverse the movement.

[RV74]

for random position

BOX: Set X position to Random(Frame Width)
BOX: Set Y position to Random(Frame Height)
// use Random(...) to make a random number in desired range


for inversing movement, you can simply set an Alterable value as invader's horizontal velocity, then change the sign of that value when you wanna make invader's movement reversed

INVADER: Set X position to X("INVADER") + Vx("INVADER")
// make offset

INVADER: Set Vx to -Vx("INVADER")
// reverse movement

[piki]

many thanks RV74, i'll try to deal with it.