map_range
Remaps a value from one range to another range.
Given two ranges \([a_1,a_2]\) and \([b_1,b_2]\), a value \(s\) in range \([a_1,a_2]\) is linearly mapped to a value \(t\) in range \([b_1,b_2]\), where: $$t = b_1+\frac{(s-a_1)(b_2-b_1)}{(a_2-a_1)}$$
// Map radians to degrees
degrees = map_range(n, -pi, pi, -180, 180);
// Map unit UV coordinates to texture page sprite
oldUV = [0.25, 0.33];
texUV = sprite_get_uvs(sprite, subimage);
newUV[0] = map_range(oldUV[0], 0.0, 1.0, texUV[0], texUV[2]);
newUV[1] = map_range(oldUV[1], 0.0, 1.0, texUV[1], texUV[3]);- map_range(x, a1, a2, b1, b2)
- Returns a value remapped from one range to another.
COPY/// @func map_range(x, a1, a2, b1, b2)
///
/// @desc Returns a value remapped from one range to another.
/// Values outside the bounds of the current range will
/// be remapped outside the bounds of the new range.
///
/// @param {real} x value to remap
/// @param {real} a1 start of current range
/// @param {real} a2 end of current range
/// @param {real} b1 start of new range
/// @param {real} b2 end of new range
///
/// @return {real} remapped value
///
/// GMLscripts.com/license
function map_range(x, a1, a2, b1, b2)
{
return b1 + (x-a1) * (b2-b1) / (a2-a1);
}
Contributors: xot
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