chillwave-vibes.ts

import * as fs from "fs"
import  * as path from "path"

import * as v from "./util/vector"

type OutputImage = {
    width: number,
    height: number,
    maxColor: number
}

function colorOutput(image: OutputImage, color: v.Vector3): string {
    const r = Math.round(color.x * image.maxColor)
    const g = Math.round(color.y * image.maxColor)
    const b = Math.round(color.z * image.maxColor)

    return (`${r} ${g} ${b}\n`)
}

function OutputImageByAspectRatio(aspectRatio: number, width: number): OutputImage{
    return {
        width: width,
        height: Math.round(width * aspectRatio),
        maxColor: 2000
    }
}


function main(){
    const image = OutputImageByAspectRatio(16/9, 400)

    var output = `P3
${image.width} ${image.height}
${image.maxColor}
`

    console.log("Rendering")
    for (var row=0; row<image.height; row++){
        console.log(`\tRendering row: ${row} of ${image.height}`)
        for (var col=0; col<image.height; col++){
            const color = v.Color(
                row / (image.width-1), 
                col / (image.height-1),
                (0.25 * image.maxColor))

            output += colorOutput(image, color)
        }
    }

    const scriptName = path.basename(__filename);
    const outputBaseName = scriptName.split(".")[0]
    const outputName = `output/${outputBaseName}.ppm`

    console.log(`Writing to: ${outputName}`);

    fs.writeFileSync(outputName, output);
}

main();