# Problem
Division by zero in `crates/bevy_color/src/hsva.rs` when `blackness` is
`1`:
```rust
impl From<Hwba> for Hsva {
fn from(
Hwba {
hue,
whiteness,
blackness,
alpha,
}: Hwba,
) -> Self {
// Based on https://en.wikipedia.org/wiki/HWB_color_model#Conversion
let value = 1. - blackness;
let saturation = 1. - (whiteness / value);
Hsva::new(hue, saturation, value, alpha)
}
}
```
## Solution
With `Hsva` colors if the `value` component is set to `0.` the output
will be pure black regardless of the values of the `hue` or `saturation`
components.
So if `value` is `0`, we don't need to calculate a `saturation` value
and can just set it to `0`:
```rust
impl From<Hwba> for Hsva {
fn from(
Hwba {
hue,
whiteness,
blackness,
alpha,
}: Hwba,
) -> Self {
// Based on https://en.wikipedia.org/wiki/HWB_color_model#Conversion
let value = 1. - blackness;
let saturation = if value != 0. {
1. - (whiteness / value)
} else {
0.
};
Hsva::new(hue, saturation, value, alpha)
}
}
```
---------
Co-authored-by: Gino Valente <49806985+MrGVSV@users.noreply.github.com>
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