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Revision as of 11:00, 11 July 2007 (edit) Sandman (Talk | contribs) ← Previous diff		Revision as of 12:06, 11 July 2007 (edit) (undo) Sandman (Talk | contribs) Next diff →
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	Program angling;		Program angling;
	Const		Const
-	screen_width = 320;	+	screen_width = 320;
-	screen_height = 200;	+	screen_height = 200;
-	screen_depth = 8;	+	screen_depth = 8;
		+	screen_fps = 60;
		+	screen_frameskip = 0;
		+	Global
		+	int distance;
		+	int tempID;
	Begin		Begin
	// Set the screen mode		// Set the screen mode
	set_mode(screen_width,screen_height,screen_depth);		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		// Create mouse graph, assign to mouse.graph
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	// Set position		// Set position
-	x = screen_width /2;	+	x = screen_width /2 * resolution;
-	y = screen_height/2;	+	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		// Always point to the mouse
	Repeat		Repeat
-	// Get the angle between this process' coordinates and those of the mouse.	+	// Get the angle and distance between this process' coordinates and those of the mouse.
-	angle = fget_angle(x,y,mouse.x,mouse.y);	+	angle = fget_angle(x,y,mouse.x*resolution,mouse.y*resolution);
		+	distance = fget_dist (x,y,mouse.x*resolution,mouse.y*resolution);
	frame;		frame;
	Until(key(_esc))		Until(key(_esc))
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	End		End
	</pre>		</pre>
-	Used in example: [[set_mode]](), [[new_map]](), [[map_clear]](), [[drawing_map]](), [[drawing_color]](), [[draw_line]](), [[mouse]], [[graph]], [[x]], [[y]], [[angle]]	+	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_angle]](), but that would be more work.		This example could also be done with [[get_angle]](), but that would be more work.

---

Revision as of 12:06, 11 July 2007

Contents 1 Definition 2 Parameters 3 Returns 4 Notes 5 Example

Definition

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

Returns the angle between two certain points. The returned angle will be ranging from 0 to 360000 (0-360º).

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 angle between point A and point B.

Notes

The angle value returned by this function is in thousandths of degrees, as most angles within Fenix are.

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_angle(), but that would be more work.