32 lines
683 B
C++
32 lines
683 B
C++
#ifndef CAMERA_H
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#define CAMERA_H
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#include "rtweekend.h"
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class camera {
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public:
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camera() {
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auto aspect_ratio = 16.0 / 9.0;
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auto viewport_height = 2.0;
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auto viewport_width = aspect_ratio * viewport_height;
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auto focal_length = 1.0;
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origin = point3(0, 0, 0);
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horizontal = vec3(viewport_width, 0, 0);
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vertical = vec3(0, viewport_height, 0);
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lower_left_corner = origin - horizontal/2 - vertical/2 - vec3(0, 0, focal_length);
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}
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ray get_ray(double u, double v) const {
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return ray(origin, lower_left_corner + u*horizontal + v*vertical - origin);
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}
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private:
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point3 origin;
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point3 lower_left_corner;
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vec3 horizontal;
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vec3 vertical;
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};
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#endif
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