From d24f0972235283e1410566c0d96c1b42a7cf37b8 Mon Sep 17 00:00:00 2001
From: PoliEcho <PoliEcho@pupes.org>
Date: Wed, 19 Feb 2025 16:48:08 +0100
Subject: [PATCH] attampt at adding zoom

---
 src/init.cpp  |  2 ++
 src/main.cpp  | 46 ++++++++++++++++++++++++++++++++--------------
 src/types.hpp | 19 ++++++++++++++++++-
 3 files changed, 52 insertions(+), 15 deletions(-)

diff --git a/src/init.cpp b/src/init.cpp
index 0b3c6bc..2db6181 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -41,4 +41,6 @@ void init_entity(Entity &entity, SDL_Renderer *renderer, std::string type,
                     entities[type][name]["height"].get<int>()};
 
   entity.speed = entities[type][name]["speed"].get<float>();
+
+  entity.gotoT = false;
 }
diff --git a/src/main.cpp b/src/main.cpp
index 9009309..480c5c8 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,9 +5,10 @@
 #include <SDL3_image/SDL_image.h>
 #include <cmath>
 #include <csignal>
-#include <cstdint>
 #include <iostream>
 #include <vector>
+#include <ctime>
+#include <iomanip>
 
 std::vector<Entity *> loaded_entities;
 sdl_session main_sdl_session;
@@ -38,7 +39,7 @@ int main() {
   Uint64 lastFrameTime = SDL_GetTicksNS();
   float deltaTime = 0.0f;
 
-
+  time_t start_time = std::time(nullptr);
 
   while (running) {
     const Uint64 frameStart = SDL_GetTicksNS();
@@ -47,16 +48,31 @@ int main() {
     // Event handling
     SDL_Event event;
     while (SDL_PollEvent(&event)) {
-      if (event.type == SDL_EVENT_QUIT)
+      if (event.type == SDL_EVENT_QUIT) {
         running = false;
+      }
+      if (event.type == SDL_EVENT_MOUSE_WHEEL) {
+        float zoom_factor = (event.wheel.y > 0) ? 0.9f : 1.1f;
+        camera.view.w *= zoom_factor;
+        camera.view.h *= zoom_factor;
+
+        // Zoom towards mouse position
+        SDL_FPoint mouse_world_pos = {
+            camera.view.x + event.wheel.mouse_x,
+            camera.view.y + event.wheel.mouse_y
+        };
+        
+        camera.view.x = mouse_world_pos.x - (event.wheel.mouse_x * zoom_factor);
+        camera.view.y = mouse_world_pos.y - (event.wheel.mouse_y * zoom_factor);
+    }
       if (event.type == SDL_EVENT_MOUSE_BUTTON_DOWN) {
         // Check specific button (e.g., left mouse button)
         if (event.button.button == SDL_BUTTON_LEFT) {
-          printf("Left mouse clicked at (%.1f, %.1f)\nCamera position: (%.1f, "
-            "%.1f)\nTarget position: (%.1f, %.1f)\n",
-            event.button.x, event.button.y, camera.view.x, camera.view.y,
-            camera.view.x + event.button.x,
-            camera.view.y + event.button.y);
+          std::clog << "Left mouse clicked at (" 
+          << std::fixed << std::setprecision(1) << event.button.x << ", " << event.button.y << ")\n"
+          << "Camera position: (" << camera.view.x << ", " << camera.view.y << ")\n"
+          << "Target position: (" << (camera.view.x + event.button.x) << ", " 
+          << (camera.view.y + event.button.y) << ")\ntime since start: " << (std::time(nullptr) - start_time) << "\n";
           destroyer.Tposition.x = camera.view.x + event.button.x;
           destroyer.Tposition.y = camera.view.y + event.button.y;
           destroyer.gotoT = true;
@@ -137,9 +153,6 @@ int main() {
         destroyer.angle = std::atan2(dy, dx) * 180 / M_PI + 90;
       }
 
-      std::clog << "angle: " << destroyer.angle
-                << "\ncalc: " << std::atan2(dy, dx) * 180 / M_PI << "\n";
-
       float distance = std::sqrt(dx * dx + dy * dy);
       if (distance > 0) {
         dx /= distance;
@@ -159,7 +172,10 @@ int main() {
       }
     }
 
-    // Camera movement
+    // Camera handling
+    camera.view.w = SCREEN_WIDTH / camera.zoom;
+    camera.view.h = SCREEN_HEIGHT / camera.zoom;
+
     if (camera.followPlayer) {
       float targetX =
           destroyer.position.x + destroyer.position.w / 2 - camera.view.w / 2;
@@ -179,9 +195,11 @@ int main() {
                                      WORLD_WIDTH - destroyer.position.w);
     destroyer.position.y = SDL_clamp(destroyer.position.y, 0.0f,
                                      WORLD_HEIGHT - destroyer.position.h);
+
+    camera.view.w = SDL_clamp(camera.view.w, SCREEN_WIDTH * camera.zoom,  SCREEN_WIDTH * 4.0f);
+    camera.view.h = SDL_clamp(camera.view.h,SCREEN_HEIGHT * camera.zoom,SCREEN_HEIGHT * 4.0f);
     camera.view.x = SDL_clamp(camera.view.x, 0.0f, WORLD_WIDTH - camera.view.w);
-    camera.view.y =
-        SDL_clamp(camera.view.y, 0.0f, WORLD_HEIGHT - camera.view.h);
+    camera.view.y = SDL_clamp(camera.view.y, 0.0f, WORLD_HEIGHT - camera.view.h);
 
     // ANIMATION HERE
 
diff --git a/src/types.hpp b/src/types.hpp
index 345e14b..aafb8b5 100644
--- a/src/types.hpp
+++ b/src/types.hpp
@@ -59,7 +59,7 @@ struct basic_cords {
 struct Entity {
   SDL_FRect position;
   SDL_FRect Tposition;
-  bool gotoT;
+  bool gotoT = false;
   SDL_Texture *texture;
   SDL_Rect srcRect;
   float speed;
@@ -80,9 +80,26 @@ struct Entity {
 
 struct Camera {
   SDL_FRect view = {0.0f, 0.0f, SCREEN_WIDTH, SCREEN_HEIGHT};
+
+  basic_cords Center_of_view(std::optional<float> x = std::nullopt,
+    std::optional<float> y = std::nullopt) {
+    if (x != std::nullopt) {
+			view.x = *x - view.w / 2;
+		}
+		if (y != std::nullopt) {
+			view.y = *y - view.h / 2;
+		}
+
+return {view.x + view.w / 2, view.y + view.h / 2};
+}
+
   bool followPlayer = false;
   float speed = 500.0f;
   float smoothness = 0.1f;
+  float zoom = 1.0f;
+	float minZoom = 0.5f;
+	float maxZoom = 3.0f;
+	float zoomSpeed = 0.1f;
 };
 
 struct sdl_session {