Working on refraction & transparency.

Lots of work left to do!

source/include/list.h

@@ -0,0 +1,94 @@
+/*
+ *  DoRayMe - a quick and dirty Raytracer
+ *  List header
+ *
+ *  Created by Manoël Trapier
+ *  Copyright (c) 2020 986-Studio.
+ *
+ */
+#ifndef DORAYME_LIST_H
+#define DORAYME_LIST_H
+
+#include <shape.h>
+
+struct ChainList
+{
+    Shape *shape;
+    ChainList *next;
+};
+
+class List
+{
+private:
+    ChainList *head;
+    ChainList *tail;
+    uint32_t count;
+public:
+    List() : head(nullptr), tail(nullptr), count(0) { };
+    ~List()
+    {
+        ChainList *p = this->head;
+        if (p == nullptr) { return; }
+
+        /* clear up the list */
+    }
+
+    Shape *last()
+    {
+        ChainList *p = this->tail;
+        if (p == nullptr) { return nullptr; }
+        return p->shape;
+    }
+
+    void remove(Shape *s)
+    {
+        ChainList *p = this->head;
+        if (p == nullptr) { return; }
+        while(p->next != nullptr)
+        {
+            if (p->next->shape == s)
+            {
+                this->count --;
+                p->next = p->next->next;
+                free(p->next);
+                return;
+            }
+            p = p->next;
+        }
+    }
+
+    void append(Shape *s)
+    {
+        ChainList *theNew = (ChainList *)calloc(1, sizeof(ChainList));
+
+        theNew->shape = s;
+
+        ChainList *p = this->tail;
+        tail = theNew;
+
+        if (p != nullptr) { p->next = theNew; }
+        else { head = theNew; } /* If the tail is empty, it mean the list IS empty. */
+
+        this->count ++;
+    }
+
+    bool isEmpty()
+    {
+        return (this->count == 0);
+    }
+
+    bool doesInclude(Shape *s)
+    {
+        ChainList *p = this->head;
+
+        while(p != nullptr)
+        {
+            if (p->shape == s) { return true; }
+            p = p->next;
+        }
+
+        return false;
+    }
+};
+
+#endif //DORAYME_LIST_H