From 38e3ab041c52a38c9b3312c689a3ece436d03373 Mon Sep 17 00:00:00 2001
From: orangerot <orangerot@orangerot.dev>
Date: Tue, 14 Oct 2025 17:47:34 +0200
Subject: [PATCH] feat: pick up bricks from hand

---
 domino.h |  2 +-
 game.c   | 50 +++++++++++++++++++++++++++++++++++++-------------
 2 files changed, 38 insertions(+), 14 deletions(-)

diff --git a/domino.h b/domino.h
index b08c332..e473776 100644
--- a/domino.h
+++ b/domino.h
@@ -4,7 +4,7 @@
 #define DOMINO_H
 
 struct eye {
-  int x,y,val;
+  size_t x,y,val;
 };
 
 struct brick {
diff --git a/game.c b/game.c
index 7c788fe..752b32b 100644
--- a/game.c
+++ b/game.c
@@ -12,13 +12,15 @@
 #define CLAMP(x,a,b) (MIN(MAX(x,a),b))
 
 size_t mouse_x = 0, mouse_y = 0;
-int eyes_front = 0, eyes_back = 0;
 
 struct bricks bricks = {0};
 
 struct brick hand[5];
 size_t hand_count = 0;
 
+struct brick active = {0};
+int has_active = 0;
+
 void key_callback(int key, int scancode, int action, int mods) {
   if (action != GLFW_PRESS) return;
   switch (key) {
@@ -35,15 +37,31 @@ void cursor_position_callback(int xpos, int ypos) {
 }
 
 void mouse_button_callback(int button, int action, int mods) {
-
   if (button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_PRESS) {
-    printf("click!\n");
-    if (++eyes_back >= NUM_DOMINO_X - 1) {
-      eyes_back = 0;
-      eyes_front = (eyes_front+1)%NUM_DOMINO_Y;
+    for (size_t i = 0; i < hand_count; i++) {
+      struct brick *b = &hand[i];
+      if (!has_active) {
+        if (b->front.x <= mouse_x && mouse_x <= b->front.x + DOMINO_WIDTH &&
+          b->front.y <= mouse_y && mouse_y <= b->front.y + DOMINO_HEIGHT
+          ) {
+          has_active = 1;
+          active = *b;
+          active.front.x -= mouse_x;
+          active.front.y -= mouse_y;
+        }
+      } else {
+        hand[i - 1] = hand[i];
+      }
     }
-    printf("%d %d\n", eyes_front, eyes_back);
+    if (has_active) hand_count--;
   }
+
+  printf("click!\n");
+  if (button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_RELEASE) {
+    has_active = 0;
+    hand[hand_count++] = active;
+  }
+
 }
 
 void init() {
@@ -64,12 +82,12 @@ void init() {
 
   hand_count = 3;
   hand[0] = (struct brick) {
-        .front = {.x = 12, .y = 5, .val = 2},
-        .back  = {.x = 13, .y = 5, .val = 5},
+        .front = {.x = 12, .y = 5, .val = 0},
+        .back  = {.x = 13, .y = 5, .val = 3},
       };
   hand[1] = (struct brick) {
-        .front = {.x = 12, .y = 5, .val = 2},
-        .back  = {.x = 13, .y = 5, .val = 5},
+        .front = {.x = 12, .y = 5, .val = 4},
+        .back  = {.x = 13, .y = 5, .val = 1},
       };
   hand[2] = (struct brick) {
         .front = {.x = 12, .y = 5, .val = 2},
@@ -98,11 +116,17 @@ void render(struct image canvas) {
     draw(canvas, domino[b->back.val][b->front.val], b->front.x * EYE_SIZE, b->front.y * EYE_SIZE);
   }
 
+  // hand
   for (size_t i = 0; i < hand_count; i++) {
     struct brick *b = &hand[i];
-    draw(canvas, domino[b->back.val][b->front.val], (canvas.width - hand_count *(DOMINO_WIDTH + 4))/2 + i * (DOMINO_WIDTH + 4), canvas.height - DOMINO_WIDTH);
+    b->front.x = (canvas.width - hand_count *(DOMINO_WIDTH + 4))/2 + i * (DOMINO_WIDTH + 4);
+    b->front.y = canvas.height - DOMINO_WIDTH;
+    draw(canvas, domino[b->back.val][b->front.val], b->front.x, b->front.y);
   }
 
-  draw(canvas,domino[eyes_front][eyes_back], CLAMP(mouse_x, 0, canvas.width), CLAMP(mouse_y, 0, canvas.height));
+  // active
+  if (has_active) {
+    draw(canvas,domino[active.back.val][active.front.val], CLAMP(mouse_x + active.front.x, 0, canvas.width), CLAMP(mouse_y + active.front.y, 0, canvas.height));
+  }
 }