moving circle prototype, circle and square drawing, part of food map implementation, utils

src/Game.cpp

@@ -1,46 +1,69 @@
 #include "Engine.h"
-#include <stdlib.h>
+#include <iostream>
 #include <memory.h>
+#include <stdlib.h>
 
-#include <stdio.h>
+// #include <stdio.h>
+
+#include "Canvas.hpp"
+
+constexpr double MIN_CONTROL_DISTANCE = 10;
 
 //
 //  You are free to modify this file
 //
 
 //  is_key_pressed(int button_vk_code) - check if a key is pressed,
-//                                       use keycodes (VK_SPACE, VK_RIGHT, VK_LEFT, VK_UP, VK_DOWN, VK_RETURN)
+//                                       use keycodes (VK_SPACE, VK_RIGHT,
+//                                       VK_LEFT, VK_UP, VK_DOWN, VK_RETURN)
 //
 //  get_cursor_x(), get_cursor_y() - get mouse cursor position
-//  is_mouse_button_pressed(int button) - check if mouse button is pressed (0 - left button, 1 - right button)
-//  schedule_quit_game() - quit game after act()
-
+//  is_mouse_button_pressed(int button) - check if mouse button is pressed (0 -
+//  left button, 1 - right button) schedule_quit_game() - quit game after act()
 
 // initialize game data in this function
-void initialize()
-{
-}
+void initialize() {}
+
+float game_time = 0.0f;
+Vecf pos = {.x = 20, .y = 20};
+Vecf direction{.x = 1.0, .y = 0.0};
+Veci prev_cursor = {.x = 0, .y = 0};
 
 // this function is called to update game data,
 // dt - time elapsed since the previous update (in seconds)
-void act(float dt)
-{
+void act(float dt) {
   if (is_key_pressed(VK_ESCAPE))
     schedule_quit_game();
 
+  Veci cursor = get_cursor();
+  if (cursor != prev_cursor and is_valid_pos(cursor)) {
+    Vecf diff = Vecf(cursor) - pos;
+
+    if (diff.len() > MIN_CONTROL_DISTANCE) {
+      direction = diff.norm();
+    }
+  }
+
+  int speed = 200;
+  pos += direction * dt * speed;
+
+  game_time += dt;
+  prev_cursor = cursor;
+  // std::cout << "pos: " << pos.x << ' ' << pos.y << std::endl;
+  // std::cout << "curs: " << get_cursor().x << ' ' << get_cursor().y <<
+  // std::endl;
 }
 
 // fill buffer in this function
-// uint32_t buffer[SCREEN_HEIGHT][SCREEN_WIDTH] - is an array of 32-bit colors (8 bits per R, G, B)
-void draw()
-{
+// uint32_t buffer[SCREEN_HEIGHT][SCREEN_WIDTH] - is an array of 32-bit colors
+// (8 bits per R, G, B)
+void draw() {
   // clear backbuffer
   memset(buffer, 0, SCREEN_HEIGHT * SCREEN_WIDTH * sizeof(uint32_t));
 
+  Circle sq({.pos = Veci(pos), .size = 20});
+  sq.show();
 }
 
 // free game data in this function
-void finalize()
-{
-}
-
+void finalize() {}