Flags

Up to Local Variables

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Definition

INT flags = 0

Flags is a predefined local variable which is used to manipulate how the graphic of a process, assigned to its local variable graph, is displayed.

To alter the effect, change the value of this local variable by assigning it blit flags. Like most bit flags, constants can be added together to combine effects. A horizontally mirrored translucent graphic would need flags B_TRANSLUCENT (4) and B_HMIRROR (1), so flags = B_TRANSLUCENT|B_HMIRROR (5) will do the trick.

Example

To make the graphic of a process spin:

Program mirror
Begin
    mirror_graphic();
    Loop
        frame;
    End
End
Process mirror_graphic()
Begin
    graph = new_map(50,50,8);
    map_clear(0,graph,rgb(0,255,255));
    x = 100;     //Position the graphic 100 pixels
    y = 100;     //from the top and left of the screen
    Loop
        if (key(_l))
            flags = B_HMIRROR; //if you press the L key, your graphic is horizontally mirrored
        else
            flags = 0;
        end       
        frame;
    End
End

The process will mirror its graphic when the key L is held down.

Local variables

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