_Putimage Question.

[SMcNeill]

STEP is the simplest command in the world.   It's just that number of pixels in X/Y change.

(100,100)- STEP (10,10)

This would start at pixel (100,100) and end up 10 pixels right, 10 pixels down.
It's the equivalent of (100,100)-(110,110)

All STEP does is add the value inside the step to the last plotted point used.

Code: (Select All)

Screen _NewImage(800, 600, 32)



PSet (100, 100)

Line -Step(100, 100), , BF

Easiest example in the world.   Start with changing the PSET a few times to experiment.  See where you use it (in this case) to set the graphic pointer somewhere on the screen?

Then the line command here will draw you a box 100 pixels right and 100 pixels down from that point you PSET.   Change those values to change the size of that box.

That's all that STEP is.   Step(yourX, yourY) is just (previousX + yourX, previousY +yourY)

[Pete]

Nice! You needed another +1 to stay tied with Mark, anyway... Good luck getting it! Kidding, +1

So here is Mark's step solution, which I fiddled with a bit after I figured out Step to some degree...

Code: (Select All)

Width 80, 25: _Font 16

fw = _FontWidth: fh = _FontHeight

t = _NewImage(fw * 2, fh, 32)

_Dest t

' Draw a triangle.

a = 6: c = 0: w = a * 2: h = a

For i = 0 To 6

    Line (a, c)-(a + i * 2, c)

    a = a - 1

    c = c + 1

Next

tri& = _CopyImage(t, 33)

_Dest 0

_FreeImage t

col = 32: row = 5: BarLength = 8

Locate row, col + 2: Print "__________Row"; row

Locate row + 8, col + 2: Print "__________Row"; row + 8

Locate row + 1, col

For j = 1 To BarLength

    Locate , col: Print Chr$(219)

Next

sx1 = col * fw - fw - 2: sy1 = fh \ 2 - 2

sx2 = sx1 + c * 2 * fw: sy2 = sy1 + i * fh + 3

TopTriangle = row * fh - fh ' 1st num is row in Screen 0.

xfactor = fh * (i - 1) - TopTriangle

BottomTriangle = BarLength * fh

Do

    _Limit 30

    _PutImage (sx1, sy1 + TopTriangle)-Step(w, h), tri&, 0, (0, 0)-(w, h) '<<<<<<<<<<<<

    _PutImage (sx1, sy2 - xfactor + BottomTriangle)-Step(w, -h), tri&, 0, (0, 0)-(w, h) '<<

Loop

Pete