Select cards

card.c

@@ -1,7 +1,7 @@
 #include "card.h"
 
 void draw_card(Card *c) {
-  DrawRectangleV(c->position, card_size, RED);
+  DrawRectangleV(c->position, card_size, c->selected ? RED : BLACK);
   DrawRectangle(c->position.x + CARD_BORDER, c->position.y + CARD_BORDER, card_size.x - (CARD_BORDER * 2), card_size.y - (CARD_BORDER * 2) , WHITE);
   DrawText(month_english_abbr[c->month], c->position.x + CARD_BORDER + 2, c->position.y + CARD_BORDER + 2, 14, BLACK);
   switch (c->type) {
@@ -23,3 +23,8 @@ void draw_card(Card *c) {
     break;
   }
 }
+
+bool point_within_card(Card *c, Vector2 point) {
+  return point.x > c->position.x && point.x < c->position.x + card_size.x &&
+    point.y > c->position.y && point.y < c->position.y + card_size.y;
+}

card.h

@@ -48,6 +48,7 @@ struct Card {
   RibbonType ribbon_type;
   Month month;
   Vector2 position;
+  bool selected;
 };
 
 struct Hand {

main.c

@@ -65,7 +65,7 @@ int main(int argc, char** argv) {
       case 41:
 	t = ANIMAL; break;
       }
-      cards[i] = (Card) { i, t, rt, month, (Vector2) { month * 65, (i % 4) * 110 } };
+      cards[i] = (Card) { i, t, rt, month, (Vector2) { month * 65, (i % 4) * 110 }, false };
     }
 
     float delta;
@@ -74,6 +74,16 @@ int main(int argc, char** argv) {
     while (!WindowShouldClose()) {
       delta = GetFrameTime();
 
+      if (IsMouseButtonPressed(0)) {
+	Vector2 mouse_pos = GetMousePosition();
+	for (int i = 0; i < 48; i++) {
+	  if (point_within_card(&cards[i], mouse_pos)) {
+	    cards[i].selected = !cards[i].selected;
+	    break;
+	  }
+	}
+      }
+
       BeginDrawing();
       ClearBackground(RAYWHITE);
       for (int i = 0; i < 48; i++) {