src/background.c


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#include "background.h"
#include "constants.h"
#include <raymath.h>

void AddBackground(const char* backgroundTextureName) {
  Entity e = {0};
  e.type = Background_Entity;

  e.flags |= ENTITY_VISIBLE;
  e.drawLayer = Background_Layer;

  e.position = (Vector2) {0.0f, 0.0f};
  Texture2D backgroundTexture = GetTexture(backgroundTextureName);

  const float backgroundSizeScale = (float)WINDOW_HEIGHT / backgroundTexture.height;
  Vector2 backgroundBounds =
    Vector2Scale((Vector2) {backgroundTexture.width, backgroundTexture.height}, backgroundSizeScale);

  e.destRect = (Rectangle) {
    .width = backgroundBounds.x,
    .height = backgroundBounds.y
  };
  e.texture = backgroundTexture;

  AddEntity(&e);
}

void UpdateBackground(Entity* background, float deltaTime) {
    background->position.x -= 600 * deltaTime;
}