rs2glsl 0.3.4

# rs2glsl

Automatically convert Rust code to GLSL for use in GPU programming.

## Example

You can write Rust code like so
```rust
use rs2glsl::prelude::*;

#[glsl]
fn smooth_min(a: f32, b: f32, k: f32) -> f32 {
    let mut h: f32 = a - b;

    h = 0.5 + 0.5 * h;

    if h < 0.0 {
        h = 0.0;
    }
    if h > 1.0 {
        h = 1.0;
    }

    return interpolation(a, b, h) - k * h * (1.0 - h);
}

#[glsl]
fn interpolation(a: f32, b: f32, t: f32) -> f32 {
    return a * (1.0 - t) + b * t;
}
```
And it gets translated to the following GLSL code.
```glsl
float smooth_min(float a, float b, float k) {
    float h = a - b;
    h = 0.5 + 0.5 * h;
    if (h < 0.0) {
        h = 0.0;
    }
    if (h > 1.0) {
        h = 1.0;
    }
    return interpolation(a, b, h) - k * h * (1.0 - h);
}
```

You can access the examples GLSL definition like so:
```rust
GLSL_SMOOTH_MIN.definition()
```

Have fun!