Computer Science Canada rain help |
| Author: | Jestar [ Mon Nov 26, 2007 6:52 pm ] |
| Post subject: | rain help |
ok so i am trying to make a weather effects in my game and i am starting with rain...i was wondering how i should go about it...Should i make the rain drops a sprite? am i able to array srpites? i tried just making the drops ovals but its a pain in the butt erasing them for they dont leave a trail...so yeah i am looking for advice on how to go about this...currently i have 1 drop as a sprite and i dont no how to array a srpite so i am stumped. |
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| Author: | Nick [ Mon Nov 26, 2007 11:31 pm ] | ||
| Post subject: | RE:rain help | ||
im liking the array however u dont NEED sprites say you have 10 rain images you want to loop, well in your program when you draw your background you could have a code such as this:
so the rain will be drawn over top of everything and the picMerge will erase the white in the image i hope u understand what i mean |
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| Author: | zylum [ Tue Nov 27, 2007 12:54 am ] |
| Post subject: | RE:rain help |
The simplest way would be to have each drop be a pixel. You can define a position record which has the parameters x, y and then make an array of this record and initialize the positions to random points on the screen. Then just apply gravity/wind to each element in the array and redraw each pixel. If a pixel goes off the screen, the reposition it to the top of the screen so that if falls down again. |
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| Author: | Jestar [ Tue Nov 27, 2007 9:06 am ] |
| Post subject: | Re: rain help |
if i drew each rain drop as a pixel then i would have to repaste the background evreytime it moved to erase it and that would cause lots of flashing...and momop i am currently trying your idea, i'll re post if ihave more trouble or i get it to work...thanks for the help guys. EDIT ok momop i tried your idea but the problem is that it dosnt erase itself after it moves...and thats mainly the reason why i want to use a sprite for the rain drop.... |
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| Author: | zylum [ Tue Nov 27, 2007 3:43 pm ] |
| Post subject: | RE:rain help |
look into View.Update to stop the flashing. redrawing the background should not be a problem as it should be proceduralized anyways. |
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| Author: | belarussian [ Wed Nov 18, 2009 6:20 pm ] |
| Post subject: | Re: rain help |
ok THis is really easy here is the code you can change the amount of rain and how fast it moves View.Set ("offscreenonly") %set up the rain const NoOfraindrops := 400 var raindropX : array 1 .. NoOfraindrops of int var raindropY : array 1 .. NoOfraindrops of int for raindrop : 1 .. NoOfraindrops raindropX (raindrop) := Rand.Int (0, maxx) raindropY (raindrop) := Rand.Int (0, maxy) end for loop for flake : 1 .. NoOfraindrops %Drop The rain raindropY (raindrop) -= Rand.Int (1, 5) %raindropX (raindrop) += Rand.Int (-1, 1) if raindropY (raindrop) < 0 then raindropY (raindrop) := maxy raindropX (raindrop) := Rand.Int (0, maxx) end if Draw.FillOval (raindropX (raindrop),raindropY (raindrop), 1, 1, blue) end for %Update the screen (because of offscreen only) View.Update delay (25) end loop |
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| Author: | belarussian [ Wed Nov 18, 2009 9:21 pm ] |
| Post subject: | RE:rain help |
umm well you have to make a background for it to work perfectly. %Make the background Draw.FillBox (0, 0, 800, 300, 29) Draw.FillBox (0, 300, 800, 600, red) %PUT THIS INSIDE THE LOOP |
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| Author: | belarussian [ Thu Nov 19, 2009 10:16 pm ] |
| Post subject: | RE:rain help |
AND YOU MIGHT GET A ERROR A FOR FLAKE CHANGE THAT TO RAINDROP so ya i hope you have a good rain program |
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| Author: | Tony [ Thu Nov 19, 2009 10:20 pm ] |
| Post subject: | RE:rain help |
Wait... so you found a thread from 2007 and proceeded to tripple-post in it? Locked, warning, etc. |
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