PROP. XV. _In any one and the same sort of Rays, emerging in any Angle out of any refracting Surface into one and the same Medium, the Interval of the following Fits of easy Reflexion and Transmission are either accurately or very nearly, as the Rectangle of the Secant of the Angle of Refraction, and of the Secant of another Angle, whose Sine is the first of 106 arithmetical mean Proportionals, between the Sines of Incidence and Refraction, counted from the Sine of Refraction._ This is manifest by...

pkg image/color/palette, var Plan9 []color.Color
pkg image/color/palette, var WebSafe []color.Color
pkg image/draw, method (Op) Draw(Image, image.Rectangle, image.Image, image.Point)
pkg image/draw, type Drawer interface { Draw }
pkg image/draw, type Drawer interface, Draw(Image, image.Rectangle, image.Image, image.Point)
pkg image/draw, type Quantizer interface { Quantize }

static calculateRectsBasedSpeedIndex(timestampedPaintRects,viewport){const numberOfRects=timestampedPaintRects.length;if(numberOfRects===0){throw new Error('Can\'t calculate speed index without any paint '+'rectangles.');}