Simple Poly Line (to mouse)

[scriptless]

Okay this is an easy one, but for some reason I cannot get a line to draw to the players mouse from a given x/y of a npc.. Any suggestions here, i know its top left, top right, bottom right, and bottom left for the order of cords.. or am i wrong here?

PHP Code:

//#CLIENTSIDE
function onMouseDown() {
  with ( findImg( 4000)) {  
    polygon = {
      mousex, mousey,
      mousex-(2/16), mousey-(2/16),
      x, y,
      x-(2/16),y-(2/16)
    };
    layer = 3;
  }
} 


All I am trying to do is make a line draw from the npc to the mouse.. =/

It seems to be twisting, but i cant get the cords working right, grr !!

[fowlplay4]

Try swapping x, y with x-(2/16), y - (2/16)

and your explanation sounds misunderstood, it's from point to point to point.

[scriptless]

ohh.. guess your right on point-to-point.. hmm
line kinds dissapears at certain angles.. is this normal tho?

[fowlplay4]

Originally Posted by scriptless

ohh.. guess your right on point-to-point.. hmm
line kinds dissapears at certain angles.. is this normal tho?

Well you're using layer 0-3, so you'd get better/pixel accuracy if you used layer 4 and up with mousescreenx and mousescreeny.

[scriptless]

Originally Posted by fowlplay4

Well you're using layer 0-3, so you'd get better/pixel accuracy if you used layer 4 and up with mousescreenx and mousescreeny.

Was not aware layers had a difference lol.. im trying to make this script plot a position on the level and draw a line to it.. so i can see the NPC's path of movement.. the npc will move along the line and pick another destination but i wanted to see it's path, you know..

[12171217]

Originally Posted by fowlplay4

Well you're using layer 0-3, so you'd get better/pixel accuracy if you used layer 4 and up with mousescreenx and mousescreeny.

It's a polygon, not a line with a width/height. Defining the points like that will only result in a proper "thickness" at two angles. The angle has to be compensated for using some trig.

[Crow]

http://forums.graalonline.com/forums...ight=draw+line

[scriptless]

So why does this NOT work?

PHP Code:

//#CLIENTSIDE
function onMouseDown() {
  this.angle = random(0,360); // angle
  this.distance = random(5,7); // distance
  this.nx = x + sin(this.angle) * this.distance;
  this.ny = y + cos(this.angle) * this.distance;
  with ( findImg( 4000)) {  
    polygon = {
      this.nx, this.ny,
      this.nx-(2/16), this.ny-(2/16),
      x-(2/16),y-(2/16),
      x, y
    };
    layer = 3;
  }
  chat = this.nx SPC this.ny;
} 


The NPC chats the correct cords but does not move to draw poly properly..

[12171217]

Originally Posted by Crow

http://forums.graalonline.com/forums...ight=draw+line

Also doesn't take into account the direction of the line. Again, needs trig.

[scriptless]

Originally Posted by 12171217

Also doesn't take into account the direction of the line. Again, needs trig.

I noticed that.. Downsider is the trig simple or no? I guess the line is not completly important but it's not drawing to the right cords when i used the above script.. the line is just for visual debugging so I guess it doesnt have to be perfect.

[scriptless]

Nvm, problem solved. I used the DrawLine() custom function and it worked perfectly.. hmm now to redo the other script I had and use this new-found information.

Thanks everyone for the help.

[fowlplay4]

Well just using 2 (ox, oy, tx, ty) points works fine as well.

[cbk1994]

Originally Posted by 12171217

Also doesn't take into account the direction of the line. Again, needs trig.

Sales made one a while back.

Originally Posted by salesman

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 


[fowlplay4]

What's the reasoning for adding pi/2, getangle a fraud?

[scriptless]

This doesnt seem to be choosing the random correctly..

PHP Code:

//#CLIENTSIDE
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; 
  } 
}  

function onMouseDown() {
    this.angle = random(this.angle-15,this.angle+15); // angle
    this.distance = random(5,7); // distance
    this.nx = x + sin(this.angle) * this.distance;
    this.ny = y + cos(this.angle) * this.distance;
    DrawLine(2000, this.nx, this.ny, x, y);
} 


The angles are still wrong.. it's supose to pick a random angle within 15 degrees of current angle.. o_O but it's still 360 =/