Grid lock ingame? plz help!

[Keehan]

im working on a a "block" type game and i need to be able to place objects by clicking.. you are able to create objects but not on a grid if you know what i mean.

kind of like minecraft where you can only create blocks on a grid based thing.

is there anyway to make my cursor allign with the grid?

thankyou

[arfa]

I would think to align the block movement with the grid rather than be too concerned about the cursor. The player clicks anywhere in the grid and the block will move into that square.

There are several examples on Nivram's site [I should be getting commission here ]
snaptogridexample.mfa
fastloopgridmovement2.mfa
customgridmovement.mfa

use the site map to find the page

[MuddyMole]

You just need an object (either invisible, or in the form of a custom cursor), that is always snapped to a grid.
Then you create the blocks relative to that.

+ Always
-> Cursor: Set X position to mouseX / cellWidth * cellWidth
-> Cursor: Set Y position to mouseY / cellHeight * cellHeight
(logically that shouldn't work, but what happens is that MMF2 rounds off the remainder of the division before it performs the multiplication).

+ Left mouse button is clicked
-> Create Block at 0,0 from Cursor

[Jacob]

That's still unnecessary :_

Left Mouse Button is clicked:
->Create Block at 0,0
->Block: Set X position to xmouse/32*32
->Block: Set Y position to ymouse/32*32

For a 32x32 grid. For anything else, just change the numbers in the formula.

[nivram]

I think there is more than one way to do what Keehan wants to accomplish. This is what makes us dribble spit from our mouths when using MMF2. Whichever method is best for the coder is the method they should use.

Marv

[Corlen]

The above two examples are basically what I used to pull off tile editing in my game for the level editor, since tiles are 16x16. I made the editor cursor be placed at:
X = (XMouse / 16) * 16
Y = (YMouse / 16) * 16

[RickyRombo]

Order of operations says the division will be calculated first anyways, so the parentheses are unnecessary (all though they help illustrate the point, so kudos for that)

All these ways work, I agree with Marv.