exponentialRamp

fn exponentialRamp(x: f32, base: f32, scale: f32, offset: f32) -> vec2<f32> {
  // Ensure base is positive and not 1 (which would make it linear)
  let b = select(base, 2.71828, abs(base - 1.0) < 0.001);
  
  // Calculate the exponential function
  let result = scale * pow(b, x) + offset;
  
  // Calculate the derivative
  let derivative = scale * pow(b, x) * log(b);
  
  return vec2<f32>(result, derivative);
}