23 lines
679 B
Zig
23 lines
679 B
Zig
const Point3 = @import("vec3.zig").Point3;
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const Vec3 = @import("vec3.zig").Vec3;
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const Ray = @import("ray.zig").Ray;
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const Material = @import("material.zig").Material;
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pub const HitRecord = struct {
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p: Point3,
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normal: Vec3,
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t: f32,
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front_face: bool,
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material: Material,
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pub fn setFaceNormal(hit: *HitRecord, ray: Ray, outward_normal: Vec3) void {
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const front_face = Vec3.dot(ray.direction, outward_normal) < 0;
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hit.*.front_face = front_face;
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if (front_face) {
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hit.*.normal = outward_normal;
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} else {
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const origin = Vec3{};
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hit.*.normal = origin.sub(outward_normal);
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}
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}
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}; |