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{$ifdef NDS_INTERFACE}
const
DEGREES_IN_CIRCLE = (1 shl 15);
function fixedToInt(n, bits: cint): cint; inline;
function intToFixed(n, bits: cint): cint; inline;
function floatToFixed(n, bits: cint): cint; inline;
function fixedToFloat(n, bits: cint): cfloat; inline;
function floorFixed(n, bits: cint): cint; inline;
function degreesToAngle(degrees: cint): cint; inline;
function angleToDegrees(angle: cint): cint; inline;
function cosLerp(angle: cint16): cint16; cdecl; external;
function sinLerp(angle: cint16): cint16; cdecl; external;
function tanLerp(angle: cint16): cint32; cdecl; external;
function acosLerp(par: cint16): cint16; cdecl; external;
function asinLerp(par: cint16): cint16; cdecl; external;
{$endif NDS_INTERFACE}
{$ifdef NDS_IMPLEMENTATION}
function fixedToInt(n, bits: cint): cint; inline;
begin
result := cint(n shr bits);
end;
function intToFixed(n, bits: cint): cint; inline;
begin
result := cint(n shl bits);
end;
function floatToFixed(n, bits: cint): cint; inline;
begin
result := cint(n * cfloat(1 shl bits));
end;
function fixedToFloat(n, bits: cint): cfloat; inline;
begin
result := cfloat(n) / cfloat(1 shl bits);
end;
function floorFixed(n, bits: cint): cint; inline;
begin
result := cint(n and (not ((1 shl bits) - 1)));
end;
function degreesToAngle(degrees: cint): cint; inline;
begin
result := degrees * DEGREES_IN_CIRCLE div 360;
end;
function angleToDegrees(angle: cint): cint; inline;
begin
result := angle * 360 div DEGREES_IN_CIRCLE;
end;
{$endif NDS_IMPLEMENTATION}
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