Randomizing an exact amount on the screen

agnivohneb · **Posted:** Wed Sep 05, 2007 6:34 pm

I want to place a specific number of dots (example 6) in a 15 by 15 pixel area I want to randomize the output so the dots so up in a different spot every time. Any help I am not that good with math. If you need any more info just ask.

Clayton · **Posted:** Wed Sep 05, 2007 6:48 pm

Think about this logically... Really, problem solving is one of the most important aspects of Computer Science. Break your big problem down into smaller problems.

1)You need to draw a dot randomly
2)You need to section off a 15 x 15 pixel area on the screen
3)The dot needs to appear in this area
4)Repeat 1) - 3) five more times

Nick · **Posted:** Wed Sep 05, 2007 10:05 pm

well what i'd do is make an x and y varible for the dot's location then use randint to randomize where it goes and use randint to limit where the dots can go

d2bb · **Posted:** Thu Sep 06, 2007 7:42 am

not even sure his question made to much sense, but just make a program to draw random x + y values inbetween 1-whatever our screen size is.

After this use a counted-loop it and you should be good.

agnivohneb · **Posted:** Fri Sep 07, 2007 10:11 pm

I figured it out

Turing:

var x, y, x2, y2 : int := 1
var num : array 1 .. 15, 1 .. 15 of int

for i : 1 .. 15
for j : 1 .. 15
num (i, j) := Rand.Int (0, 225)
end for
end for

for i : 1 .. 225 by 15
for j : 1 .. 225 by 15
for k : 1 .. num (x2, y2)
loop
x := Rand.Int (i, i + 14)
y := Rand.Int (j, j + 14)
exit when whatdotcolor (x, y) not= 7
end loop
Draw.Dot (x, y, black)
end for
y2 += 1
end for
x2 += 1
y2 := 1
end for

I only set num to a random number for now i will change it later to use a specific number. I'm on the right track now. I think.

Nick · **Posted:** Fri Sep 07, 2007 11:06 pm

you looking for something like this?

Turing:

var x, y : int

for i : 1 .. 6
x := Rand.Int (100, 115)
y := Rand.Int (100, 115)
drawdot (x, y, black)
end for

what u did was go WAY to indepth for something pretty simple

agnivohneb · **Posted:** Fri Sep 07, 2007 11:19 pm

That is the same thing I had only I expanded it to more 15x15 boxes there are 15x15 boxes = 225 pixels up and 225 pixels over each individual box is a unique number and when i release the program next week you will see were I'm going with this.

Nick · **Posted:** Sat Sep 08, 2007 11:28 am

oh i get it i still dont get where ur going but i assume both ways would work for my way just make my for loop inside 2 others and have those 2 for loops equal the x and y inside the Rand.Int... when i get less lazy ill show u

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