how to ray trace in matlab

main.m
% Define the 3D scene geometry (e.g., objects, lights, camera)
% This example uses a simple scene with a sphere, point light source, and orthographic camera
sphere_center = [0 0 2]; 
sphere_radius = 1;
sphere_material = [0.8 0.2 0.2]; % Red
light_position = [0 0 -10];
camera_position = [0 0 0];
camera_direction = [0 0 1];

% Define the rendering properties (e.g., number of rays to simulate, sampling rate)
num_rays = 1000;
sample_rate = 2;

% Generate a set of rays from the camera
rays = cv_camproj(camera_position, camera_direction, 'ortho', 'Resolution', [480 640], 'AxesRange', [-1 1]);

% Cast rays and detect intersections with scene geometry
intersect_pts = cv_ray_intersect(rays, 'Sphere', sphere_center, sphere_radius);

% Compute illumination at each intersection point (e.g., diffuse + specular reflection)
intensity = cv_illuminate(intersect_pts, light_position, sphere_material);

% Visualize the ray traced image
image = cv_render_scene(rays, intensity, 'SampleRate', sample_rate);
imshow(image);
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