Graal Forums - drawLine()

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- - drawLine() (https://forums.graalonline.com/forums/showthread.php?t=78427)

findimg() vs. showimg() is just a matter from preference. one isn't more OO than the other; one isn't more 'GS2' than the other. they are pretty much equivalent.

For example, taking

Quote:

Originally Posted by Kristi (Post 1371570)

showimg is a fine function. I personally do something like
this.whatevz = showimg(whatevz);
then generally reference the variable when i want to change anything
this.whatevz.red = rad;

i would do something along the lines of:

PHP Code:


		
			
with (findimg(1)) {

  //whatevz

  thiso.whatevz = this;

}

but either way is just as good.

I came across this thread when trying to find out if there was a built in drawLine() function. However, I needed the width of the line to be the same regardless of angle and made this:

PHP Code:


		
			
//DrawLine( img_index, start_x, start_y, target_x, target_y, width_in_tiles, red, green, blue, alpha)

public function DrawLine( ind, sx, sy, tx, ty, wid, r, g, b, alph ) {

  temp.ang = getangle(tx - sx, ty - sy) + (pi/2);

  temp.wid = ( wid == NULL ? .1 : wid );



  with ( findImg(ind) ) {

    polygon = {

      sx, sy,

      tx, ty,

      tx + cos(ang)*wid, ty - sin(ang)*wid,

      sx + cos(ang)*wid, sy - sin(ang)*wid

    };

    red = ( r < 0 || r > 1 ? 0 : r );

    green = ( g < 0 || g > 1 ? 0 : g );

    blue = ( b < 0 || b > 1 ? 0 : b );

    alpha = ( alph <= 0 || alph > 1 ? 1 : alph);

    layer = 3;

  }

}

An example:

PHP Code:


		
			
DrawLine(200, 25, 25, 45, 45);

//Draws a black line of width .1 tiles from 25,25 to 45,45

or if you want to specify color, width and alpha:

PHP Code:


		
			
DrawLine(200, 25, 25, 45, 45, .3, 1, 0, 0, .5);

//Draws a semi-transparent red line of width .3 tiles from 25,25 to 45,45