s'occuper de minilibx

2025-02-17 19:11:52 +01:00
parent 8104118a08
commit 9b2f53bfa4
6 changed files with 287 additions and 104 deletions
@@ -0,0 +1,76 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   shadows.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: yantoine <yantoine@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/02/17 18:58:42 by yantoine          #+#    #+#             */
+/*   Updated: 2025/02/17 19:03:01 by yantoine         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "miniRT.h"
+
+// Vérifie les intersections avec les sphères
+static bool checkShadowSphere(const Ray shadowRay, float maxT, float epsilon) {
+    int i = 0;
+    t_vec3 dummy;
+    float t;
+    while (i < numSpheres) {
+        t = intersectSphere(shadowRay, spheres[i], &dummy);
+        if (t > epsilon && t < maxT)
+            return true;
+        i++;
+    }
+    return false;
+}
+
+// Vérifie les intersections avec les plans
+static bool checkShadowPlane(const Ray shadowRay, float maxT, float epsilon) {
+    int i = 0;
+    t_vec3 dummy;
+    float t;
+    while (i < numPlanes) {
+        t = intersectPlane(shadowRay, planes[i], &dummy);
+        if (t > epsilon && t < maxT)
+            return true;
+        i++;
+    }
+    return false;
+}
+
+// Vérifie les intersections avec les cylindres
+static bool checkShadowCylinder(const Ray shadowRay, float maxT, float epsilon) {
+    int i = 0;
+    t_vec3 dummy;
+    float t;
+    while (i < numCylinders) {
+        t = intersectCylinder(shadowRay, cylinders[i], &dummy);
+        if (t > epsilon && t < maxT)
+            return true;
+        i++;
+    }
+    return false;
+}
+
+// Fonction principale qui détermine si le point est dans l'ombre
+bool isInShadow(t_vec3 hitPoint, t_vec3 lightPos) {
+    const float epsilon = 1e-3f;
+    t_vec3 toLight = vec3_sub(lightPos, hitPoint);
+    float maxT = vec3_length(toLight);
+    t_vec3 L = vec3_normalize(toLight);
+    Ray shadowRay;
+    shadowRay.origin = vec3_add(hitPoint, vec3_scale(L, epsilon));
+    shadowRay.direction = L;
+
+    if (checkShadowSphere(shadowRay, maxT, epsilon))
+        return true;
+    if (checkShadowPlane(shadowRay, maxT, epsilon))
+        return true;
+    if (checkShadowCylinder(shadowRay, maxT, epsilon))
+        return true;
+    
+    return false;
+}
+