44 lines
1003 B
Rust
44 lines
1003 B
Rust
use crate::types::{Ray, Vec3};
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pub struct Camera {
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pub origin: Vec3,
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pub horizontal: Vec3,
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pub vertical: Vec3,
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pub lower_left_corner: Vec3,
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}
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impl Camera {
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pub const fn new(
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origin: Vec3,
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horizontal: Vec3,
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vertical: Vec3,
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lower_left_corner: Vec3,
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) -> Self {
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Self {
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origin,
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horizontal,
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vertical,
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lower_left_corner,
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}
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}
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pub fn get_ray(&self, u: f32, v: f32) -> Ray {
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Ray::new(
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self.origin,
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self.lower_left_corner + self.horizontal * u + self.vertical * v - self.origin,
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)
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}
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}
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impl std::default::Default for Camera {
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fn default() -> Self {
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Camera {
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origin: Vec3::new(0.0, 0.0, 0.0),
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// Because canvas is in 2:1 ratio
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horizontal: Vec3::new(4.0, 0.0, 0.0),
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vertical: Vec3::new(0.0, 2.0, 0.0),
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lower_left_corner: Vec3::new(-2.0, -1.0, -1.0),
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}
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}
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}
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