feat: add camera singleton

src/engineCamera.c

@@ -1,9 +1,49 @@
 #include "engine.h"
 
-Camera2D CreateCamera(Vector2 playerPosition, float initZoom){
+Camera2D* GetCamera(void){
+	static Camera2D camera;
+	return &camera;
+}
+
+Rectangle GetCameraRectangle(void)
+{
+	Camera2D *camera = GetCamera();
+	float screenWidth = GetScreenWidth();
+	float screenHeight = GetScreenHeight();
+	
+    float viewWidth = 0.0f;
+	float viewHeight = 0.0f;
+	float viewX = 0.0f;
+	float viewY = 0.0f;
+	printf("\n CameraZoom: %f \n", camera->zoom);
+	if (camera->zoom < 0.5f)
+	{	
+		viewWidth = screenWidth;
+		viewHeight = screenHeight;
+
+		viewX = camera->target.x - camera->offset.x;
+		viewY = camera->target.y - camera->offset.y;
+	} else 
+	{
+		viewWidth = screenWidth / camera->zoom;
+		viewHeight = screenHeight / camera->zoom;
+
+		viewX = camera->target.x - (camera->offset.x / camera->zoom);
+		viewY = camera->target.y - (camera->offset.y / camera->zoom);
+	}
+	return (Rectangle){
+		.x = viewX,
+		.y = viewY,
+		.width = viewWidth,
+		.height = viewHeight
+	};
+}
+
+void CreateCamera(Vector2 playerPosition, float initZoom){
+	Camera2D* camera = GetCamera();
     int windowWidth = GetScreenWidth();
     int windowHeight = GetScreenHeight();
-    return (Camera2D){
+    *camera = (Camera2D){
         .offset = (Vector2){windowWidth / 2.0f, windowHeight / 2.0f},
         .target = playerPosition,
         .rotation = 0.0f,
@@ -11,17 +51,19 @@ Camera2D CreateCamera(Vector2 playerPosition, float initZoom){
     };
 }
 
-void UpdateCameraTarget(Camera2D *camera, Vector2 *position, const float smoothness){
+void UpdateCameraTarget(Vector2 *position, const float smoothness){
+	Camera2D* camera = GetCamera();
     camera->target = Vector2Lerp(camera->target, *position, smoothness * GetFrameTime());
 }
 
-void UpdateCameraZoom(Camera2D *camera, const float *scaleFactor, const float *minZoom, const float *maxZoom){
+void UpdateCameraZoom(const float *scaleFactor, const float *minZoom, const float *maxZoom){
+	Camera2D *camera = GetCamera();
     float targetZoom = Clamp(camera->zoom * *scaleFactor, *minZoom, *maxZoom);
     camera->zoom = Lerp(camera->zoom, targetZoom, 0.1f);
 }
 
-void UpdateCamera2D(Camera2D* camera, Vector2* position, Mouse* mouse){
-    UpdateCameraTarget(camera, position, 5.0f);
-    UpdateCameraZoom(camera, &mouse->scaleFactor, &mouse->minZoom, &mouse->maxZoom);
+void UpdateCamera2D(Vector2* position, Mouse* mouse){
+    UpdateCameraTarget(position, 5.0f);
+    UpdateCameraZoom(&mouse->scaleFactor, &mouse->minZoom, &mouse->maxZoom);
 }