1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
package main
type Color struct {
r, g, b float64
}
func (color Color) ToPixel() Pixel {
return Pixel{int(color.r * 255), int(color.g * 255), int(color.b * 255)}
}
func LinearBlend(color1 Color, color2 Color, param float64) Color {
return Color{
param*color1.r + (1.0-param)*color2.r,
param*color1.g + (1.0-param)*color2.g,
param*color1.b + (1.0-param)*color2.b,
}
}
func RayColor(ray Ray, hitable Hitable) Color {
hit := hitable.Hit(ray)
if hit.time > 0.0 {
vec := AddVec3D(hit.normal, Vec3D{1.0, 1.0, 1.0})
return LinearBlend(Color{vec.x, vec.y, vec.z}, Color{0.0, 0.0, 0.0}, 0.5)
}
param := 0.5 * (ray.direction.Unit().y + 1)
return LinearBlend(Color{0.5, 0.7, 1.0}, Color{1.0, 1.0, 1.0}, param)
}
|
