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Revision as of 00:08, 9 July 2007 (edit) Sandman (Talk | contribs) m (→Returns) ← Previous diff		Revision as of 12:05, 11 July 2007 (edit) (undo) Sandman (Talk | contribs) Next diff →
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	== Returns ==		== Returns ==
	'''INT''' : The distance between point A and point B.		'''INT''' : The distance between point A and point B.
		+
		+	== Example ==
		+	<pre>
		+	Program angling;
		+	Const
		+	screen_width = 320;
		+	screen_height = 200;
		+	screen_depth = 8;
		+	screen_fps = 60;
		+	screen_frameskip = 0;
		+	Global
		+	int distance;
		+	int tempID;
		+	Begin
		+
		+	// Set the screen mode
		+	set_mode(screen_width,screen_height,screen_depth);
		+	set_fps(screen_fps,screen_frameskip);
		+
		+	// Change this to see what happens
		+	resolution = 100;
		+
		+	// Create mouse graph, assign to mouse.graph
		+	mouse.graph = new_map(20,20,screen_depth);
		+	map_clear(0,mouse.graph,rgb(255,0,0));
		+
		+	// Create arrow, assign to graph
		+	graph = new_map(30,30,screen_depth);
		+	drawing_map(0,graph);
		+	drawing_color(rgb(0,255,0));
		+	draw_line( 0,29,29,30/2);
		+	draw_line( 0, 0,30,30/2);
		+
		+	// Set position
		+	x = screen_width /2 * resolution;
		+	y = screen_height/2 * resolution;
		+
		+	// Display distance
		+	write(0,0,0,0,"Distance:");
		+	write_int(0,60,0,0,&distance);
		+
		+	// Always point to the mouse
		+	Repeat
		+	// Get the angle and distance between this process' coordinates and those of the mouse.
		+	angle = fget_angle(x,y,mouse.x*resolution,mouse.y*resolution);
		+	distance = fget_dist (x,y,mouse.x*resolution,mouse.y*resolution);
		+	frame;
		+	Until(key(_esc))
		+
		+	End
		+	</pre>
		+	Used in example: [[set_mode]](), [[new_map]](), [[map_clear]](), [[drawing_map]](), [[drawing_color]](), [[draw_line]](), [[write]](), [[write_int]](), [[fget_angle]](), [[fget_dist]](), [[resolution]], [[mouse]], [[graph]], [[x]], [[y]], [[angle]]
		+
		+	This example could also be done with [[get_dist]](), but that would be more work. It also gives a much less accurate distance when the [[resolution]] is >1.
		+
		+	Resolution is 100:
		+	{|
		+	| http://wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/get_angle.PNG || VS || http://wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/fget_angle.PNG
		+	|-
		+	| [[get_angle]]() and [[get_dist]]() with a [[process]] || || [[fget_angle]]() and [[fget_dist]]()
		+	|}

---

Revision as of 12:05, 11 July 2007

Contents 1 Definition 2 Parameters 3 Returns 4 Example

Definition

INT fget_dist ( <INT pointA-X> , <INT pointA-Y> , <INT pointB-X> , <INT pointB-Y> )

Returns the distance between two certain points.

Parameters

INT pointA-X	- The X-coordinate of point A.
INT pointA-Y	- The Y-coordinate of point A.
INT pointB-X	- The X-coordinate of point B.
INT pointB-Y	- The Y-coordinate of point B.

Returns

INT : The distance between point A and point B.

Example

Program angling;
Const
    screen_width     = 320;
    screen_height    = 200;
    screen_depth     = 8;
    screen_fps       = 60;
    screen_frameskip = 0;
Global
    int distance;
    int tempID;
Begin

    // Set the screen mode
    set_mode(screen_width,screen_height,screen_depth);
    set_fps(screen_fps,screen_frameskip);

    // Change this to see what happens
    resolution = 100;

    // Create mouse graph, assign to mouse.graph
    mouse.graph = new_map(20,20,screen_depth);
    map_clear(0,mouse.graph,rgb(255,0,0));

    // Create arrow, assign to graph
    graph = new_map(30,30,screen_depth);
    drawing_map(0,graph);
    drawing_color(rgb(0,255,0));
    draw_line( 0,29,29,30/2);
    draw_line( 0, 0,30,30/2);

    // Set position
    x = screen_width /2 * resolution;
    y = screen_height/2 * resolution;

    // Display distance
    write(0,0,0,0,"Distance:");
    write_int(0,60,0,0,&distance);

    // Always point to the mouse
    Repeat
        // Get the angle and distance between this process' coordinates and those of the mouse.
        angle    = fget_angle(x,y,mouse.x*resolution,mouse.y*resolution);
        distance = fget_dist (x,y,mouse.x*resolution,mouse.y*resolution);
        frame;
    Until(key(_esc))

End

Used in example: set_mode(), new_map(), map_clear(), drawing_map(), drawing_color(), draw_line(), write(), write_int(), fget_angle(), fget_dist(), resolution, mouse, graph, x, y, angle

This example could also be done with get_dist(), but that would be more work. It also gives a much less accurate distance when the resolution is >1.

Resolution is 100:

	VS
get_angle() and get_dist() with a process		fget_angle() and fget_dist()