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coupe interesction cylinder

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This commit is contained in:
H3XploR
2025-02-17 18:08:58 +01:00
parent 0bd320f204
commit 224c55611a
6 changed files with 191 additions and 16 deletions
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parsing_sphere.c
+24 -1
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@@ -6,7 +6,7 @@
/* By: yantoine <yantoine@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/02/15 19:46:16 by yantoine #+# #+# */
/* Updated: 2025/02/15 19:48:43 by yantoine ### ########.fr */
/* Updated: 2025/02/17 17:31:42 by yantoine ### ########.fr */
/* */
/* ************************************************************************** */
@@ -23,3 +23,26 @@ t_scene parsing_sphere(const char *line, t_scene scene)
scene.numSpheres++;
return (scene);
}
float intersectSphere(Ray ray, Sphere s, t_vec3 *hitNormal)
{
t_calc calc;
calc.oc = vec3_sub(ray.origin, s.center);
calc.a = vec3_dot(ray.dir, ray.dir);
calc.b = 2.0f * vec3_dot(calc.oc, ray.dir);
c = vec3_dot(calc.oc, calc.oc) - s.radius * s.radius;
calc.disc = calc.b * calc.b - 4 * calc.a * c;
if (calc.disc < 0)
return (-1);
calc.sqrtDisc = sqrtf(calc.disc);
calc.t0 = (-calc.b - calc.sqrtDisc) / (2 * calc.a);
calc.t1 = (-calc.b + calc.sqrtDisc) / (2 * calc.a);
calc.t = (calc.t0 > 1e-3f) ? calc.t0 : calc.t1;
if (calc.t < 1e-3f)
return (-1);
calc.hitPoint = vec3_add(ray.origin, vec3_scale(ray.dir, calc.t));
*hitNormal = vec3_normalize(vec3_sub(calc.hitPoint, s.center));
return (calc.t);
}