Examples

Examples

This page shows example usage of gzScript for units and quantities.

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Basic Quantities

length = 25.4:mm:;    // 25.4 mm
distance = 1:m:;      // 1 metre

// automatic SI conversion. According to the conversion rules the result has the finest grained unit.
sum = length + distance; 
assert ( unit(sum) == :mm:;   
assert ( sum == 1025.4:mm);
assert ( numeric_value(sum) == 1025.4);

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Velocity

d = 100:m:;
t = 9.58:s:;

v = d / t;      // = 10.44:m/s:;

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Multiplication and Division

w = 2:m:;
h = 3:m:;

area = w * h;   // = 6:m^2:;

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Refinements

h:height: = 1.75:m:;
w:width:  = 0.30:m:;

// ok: assign from anonymous length
h = 2:m:;

// error: width cannot be assigned from height
w = h;     // compile error

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Angles

phi = 180:deg:;
theta = 3.14159:rad:;

// explicit conversion deg → rad
phi_r::rad: = phi;

x = sin(theta); // ok: sin takes an angle as argument
y = sin(0.1);  // ok sin takes radian as argument , radian is convertible from numeric
z = sin(phi/2);  // ok degrees are an angle

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Mixed Units

a = 2:ft:;
b = 1:m:;

// result is SI
c = a + b;    // 1.6096:m:

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Derived Units

force = 10:N:;    // newton
area  = 2:m^2:;

pressure = force / area;   // 5:Pa:

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Status

This page is a living draft. More examples will be added as gzScript features evolve.