map-copy
hio/nwt-gus-hi/map-copy
Projects a number from one range to another preserving ratio
map-copy
@/map-copy
Projects a number from one range to another preserving ratio
Xnumber
Value to map
Sminnumber
Source range lower bound
Smaxnumber
Source range upper bound
Tminnumber
Target range lower bound
Tmaxnumber
Tartger range upper bound
OUTnumber
Mapped value
Previously known as xod/core/map-range.
C++ implementation
#pragma XOD dirtieness disable
node {
void evaluate(Context ctx) {
auto x = getValue<input_X>(ctx);
auto sMin = getValue<input_Smin>(ctx);
auto sMax = getValue<input_Smax>(ctx);
auto tMin = getValue<input_Tmin>(ctx);
auto tMax = getValue<input_Tmax>(ctx);
auto k = (x - sMin) / (sMax - sMin);
auto xm = isnan(x) ? x : tMin + k * (tMax - tMin);
emitValue<output_OUT>(ctx, xm);
}
}Tabular tests
| X | Smin | Smax | Tmin | Tmax | OUT |
| 0 | 0 | 1 | -10 | 10 | -10 |
| 0.5 | 0 | 1 | -10 | 10 | 0 |
| 25 | 0 | 1 | 0 | 10 | 250 |
| -10 | 0 | 1 | 0 | 10 | -100 |
| 0.5 | 0 | 1 | 0 | Inf | Inf |
| 0.5 | 0 | 1 | -Inf | Inf | NaN |
| Inf | 0 | 1 | 0 | 10 | Inf |
| -Inf | 0 | 1 | 0 | 10 | -Inf |
| NaN | 0 | 1 | 0 | 10 | NaN |