From cda395d6b90ca1b25ecb6c5fb57ae773e8a20dc1 Mon Sep 17 00:00:00 2001
From: Priec <filippriec@gmail.com>
Date: Fri, 14 Nov 2025 17:31:37 +0100
Subject: [PATCH] calculations

---
 semestralka1/src/render/loop.cpp              | 11 +++-----
 .../src/render/player_positioning.cpp         | 25 +++++++++++++++++++
 semestralka1/src/render/player_positioning.h  | 11 ++++++++
 3 files changed, 40 insertions(+), 7 deletions(-)
 create mode 100644 semestralka1/src/render/player_positioning.cpp
 create mode 100644 semestralka1/src/render/player_positioning.h

diff --git a/semestralka1/src/render/loop.cpp b/semestralka1/src/render/loop.cpp
index 76e5f91..5cf3424 100644
--- a/semestralka1/src/render/loop.cpp
+++ b/semestralka1/src/render/loop.cpp
@@ -1,6 +1,7 @@
 // src/render/loop.cpp
 #include "loop.h"
 #include "../background_dark_inverted.h"
+#include "player_positioning.h"
 #include "background.h"
 #include "mbed.h"
 #include "player.h"
@@ -25,11 +26,6 @@ struct WalkingState {
   Timer state_timer;
 };
 
-struct PlayerPosition {
-  int x;
-  int y;
-};
-
 static char rx_buffer[BUFFER_SIZE];
 static char message[BUFFER_SIZE];
 static bool message_active = false;
@@ -133,7 +129,7 @@ void render_loop(int speed) {
   anim_timer.start();
   int shift = 0;
 
-  PlayerPosition pos = {9, 3};
+  PlayerPosition pos = {9, 9};
 
   const char *bg_file = "background_dark_inverted.txt";
   bool need_redraw = false;
@@ -162,7 +158,8 @@ void render_loop(int speed) {
     if (need_redraw) {
       draw_mask(bg_file, shift, message_active ? message : nullptr);
       int player_frame = get_player_frame(player_state.current_state);
-      draw_player(pos.x, pos.y, player_frame);
+      PlayerPosition draw_pos = get_aligned_frame_position(pos, player_frame);
+      draw_player(draw_pos.x, draw_pos.y, player_frame);
 
       // alternate between frame 0 and 1 when not crawling
       if (player_state.current_state != PlayerState::Crawl1) {
diff --git a/semestralka1/src/render/player_positioning.cpp b/semestralka1/src/render/player_positioning.cpp
new file mode 100644
index 0000000..61a069e
--- /dev/null
+++ b/semestralka1/src/render/player_positioning.cpp
@@ -0,0 +1,25 @@
+// src/render/player_positioning.cpp
+#include "player_positioning.h"
+#include <cstdio>
+
+// Convert a pivot coordinate (bottom-left) to the top-left draw position
+PlayerPosition get_aligned_frame_position(PlayerPosition base, int frame_index) {
+    if (frame_index < 0 || frame_index >= PLAYER_FRAME_COUNT)
+        frame_index = 0;
+
+    int sprite_height = 0;
+    if (frame_index == 0)
+        sprite_height = PLAYER_MASK_LINES_FRAME_1;
+    else if (frame_index == 1)
+        sprite_height = PLAYER_MASK_LINES_FRAME_2;
+    else
+        sprite_height = PLAYER_MASK_LINES_FRAME_3;
+
+    // The X coordinate stays the same (left edge aligned)
+    // The Y coordinate moves upward by the sprite height,
+    // because the pivot is bottom-left, but rendering starts from top-left
+    PlayerPosition draw_pos;
+    draw_pos.x = base.x;
+    draw_pos.y = base.y - sprite_height + 1;  // align to feet baseline
+    return draw_pos;
+}
diff --git a/semestralka1/src/render/player_positioning.h b/semestralka1/src/render/player_positioning.h
new file mode 100644
index 0000000..4ef5934
--- /dev/null
+++ b/semestralka1/src/render/player_positioning.h
@@ -0,0 +1,11 @@
+// src/render/player_positioning.h
+#pragma once
+#include "player_mask.h"
+
+struct PlayerPosition {
+    int x;
+    int y;
+};
+
+// Calculates drawing position relative to bottom-left pivot
+PlayerPosition get_aligned_frame_position(PlayerPosition base, int frame_index);