H3XploR
69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* trace.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: yantoine <yantoine@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/02/17 19:07:07 by yantoine #+# #+# */
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/* Updated: 2025/02/19 16:30:27 by yantoine ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "miniRT.h"
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// Calcule l'éclairage (ambiant, diffus et spéculaire) sur un point d'impact
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t_vec3 calc_lighting(t_vec3 hitPoint, t_vec3 hitNormal, t_vec3 objColor,
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t_scene scene)
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{
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int i;
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t_calc calc;
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calc.color = vec3_scale(objColor, scene.ambient.ratio);
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i = 0;
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while (i < scene.numLights)
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{
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calc.light = scene.lights[i];
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calc.l = vec3_normalize(vec3_sub(calc.light.pos, hitPoint));
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if (!is_in_shadow(hitPoint, calc.light.pos, scene))
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{
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calc.diff = fmaxf(0.0f, vec3_dot(hitNormal, calc.l));
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calc.view_dir = vec3_normalize(vec3_sub(scene.camera.camPos, hitPoint));
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calc.half_dir = vec3_normalize(vec3_add(calc.l, calc.view_dir));
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calc.spec = powf(fmaxf(0.0f, vec3_dot(hitNormal, calc.half_dir)), 32.0f);
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calc.color = vec3_add(calc.color, vec3_scale(vec3_mul(objColor, calc.light.color),
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calc.diff * calc.light.brightness));
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calc.color = vec3_add(calc.color, vec3_scale((t_vec3){1, 1, 1}, calc.spec
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* calc.light.brightness));
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}
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i++;
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}
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if (calc.color.x > 1.0f)
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calc.color.x = 1.0f;
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if (calc.color.y > 1.0f)
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calc.color.y = 1.0f;
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if (calc.color.z > 1.0f)
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calc.color.z = 1.0f;
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return (calc.color);
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}
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// Fonction principale de lancer de rayon (trace)
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t_vec3 trace(t_ray ray, t_scene scene)
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{
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float tMin;
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t_vec3 hitNormal;
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t_vec3 objColor;
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t_vec3 hitPoint;
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tMin = 1e9;
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hitNormal = (t_vec3){0, 0, 0};
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objColor = (t_vec3){0, 0, 0};
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scene.ray = ray;
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if (intersect_objects(&tMin, &hitNormal, &objColor, scene))
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{
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hitPoint = vec3_add(scene.ray.origin, vec3_scale(scene.ray.dir, tMin));
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return (calc_lighting(hitPoint, hitNormal, objColor, scene));
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}
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return ((t_vec3){0, 0, 0}); // Couleur de fond (ciel)
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}
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