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Fget angle

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Revision as of 11:00, 11 July 2007 (edit)
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Line 28: Line 28:
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
Line 48: Line 57:
// 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))
Line 60: Line 74:
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

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.

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