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package main
import (
"math/rand"
"github.com/schollz/progressbar"
)
const HEIGHT = 100
const WIDTH = 200
const T_MIN = 0.001
const T_MAX = 1000
const RAY_PER_PIXEL = 100
const MAX_DEPTH = 50
func main() {
LOWER_LEFT_CORNER := Vec3D{-2.0, -1.0, -1.0}
ORIGIN := Vec3D{0.0, 0.0, 0.0}
HORIZONTAL := Vec3D{4.0, 0.0, 0.0}
VERTICAL := Vec3D{0.0, 2.0, 0.0}
CAMERA := Camera{LOWER_LEFT_CORNER, ORIGIN, HORIZONTAL, VERTICAL}
SPHERE := Sphere{Vec3D{0.0, 0.0, -1.0}, 0.5}
EARTH := Sphere{Vec3D{0.0, -100.5, -1.0}, 100.0}
WORLD := HitableList{EARTH, SPHERE}
frame := Frame{}
bar := progressbar.New(HEIGHT)
for x := 0; x < HEIGHT; x++ {
for y := 0; y < WIDTH; y++ {
var color_list [RAY_PER_PIXEL]Color
for it := 0; it < RAY_PER_PIXEL; it++ {
u := (float64(y) + rand.Float64()) / float64(WIDTH)
v := (float64(x) + rand.Float64()) / float64(HEIGHT)
ray := CAMERA.GetRay(u, v)
color_list[it] = RayColor(ray, WORLD, 0)
}
color := ColorMeanSquare(color_list)
frame[HEIGHT-1-x][y] = color.ToPixel()
}
bar.Add(1)
}
frame.Save("img.ppm")
}
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