Global Variables in main.cpp

In main.cpp we are defining several variables needed for the bloom effect

Shader Ids

GLuint bloomrenderShader;
GLuint bloomfilterShader;
GLuint bloomblurShader;
GLuint bloomblendShader;

Window size and bloom framebuffer size

int width = 800;
int height = 800;
int bloomBufWidth;
int bloomBufHeight;

Framebuffer ID and texture ID

// framebuffer ID
GLuint colourFBO, blurFBO;
// render texture ID and blurring buffer ID
GLuint colourTex, blurtex[2];

The square mesh for rendering full screen texture

std::shared_ptr<Mesh> square;

In addition, we are going to move the scene as a global variable

With Scene Graph

std::shared_ptr<Node> scene;

Without Scene Graph, e.g. use the teapot directly

std::shared_ptr<Mesh> teapot;