Advanced Graphics Engine

GitHub Repository - Latest Release

Its contributors are:

• Yeray Tarifa
• Sergi Colomer

Engine Features

• Static 3d model loading
• Embedded Geometry (Primitives): Plane, Sphere & Cube
• Light Casters: Point & Directional Lights
• Free camera roaming or Pivot Camera (around the center of the scene)
• ImGui

Renderer Features

• Forward or Deferred Rendering Modes
• Environment Mapping: Skybox & Irradiance

Deferred Renderer Specific Features

• G-Buffer (Framebuffer Object) with different render targets attached: Position, Normals, Albedo, Specular, Reflective & Depth
• Render to screen-filling quad
• Geometry & Lighting Pass
• Light caster entities are rendered using forward shading
• Screen-Space Ambien Occlusion (SSAO)

Controls

Action	Input
Forwards	W
Backwards	S
Left	A
Right	D
Up	Q
Down	E
Rotation	MOUSE LEFT
Zoom	MOUSE WHEEL
Quit	ESC

ImGui Windows

Renderer

Change between Forward and Deferred Rendering through a combo box.

Environment Mapping

Enable or disable the following environment mapping options:

• Skybox
• Irradiance
• Reflection
• Refraction

Shaders for Environment Mapping: "EquirectToCubemap.glsl", "Irradiance_Convolution.glsl" and "Skybox.glsl"

Screen-Space Ambient Occlusion (SSAO)

It is of note that these options can only be displayed in Deferred Rendering

Enable or disable the SSAO effect and tweak the following SSAO options:

SSAO Option	Description
Range check	Avoid incorrect contribution near edges to the occlusion factor
Blur	Smooth the effect for a better result
Radius	The radius of the hemisphere
Bias	To solve acne effect when reconstructing the depth position
Power	Multiplier of the effect
Kernel Size	The amount of random samples
Noise Size Scale	The amount of semi-random rotations

Shaders for SSAO: "SSAO.glsl" and "SSAO_Blur.glsl"

G-Buffer Render Target

It is of note that these options can only be displayed in Deferred Rendering

Select the render target that will be displayed in screen through a combo box. The following are its options:

• Final Color
• Depth
• Position
• Normal
• Albedo
• Specular
• Reflective + Shininess

Scene

Camera

Here the user can modify the camera's parameters of position, speed and zoom. In addition, the user can switch from free camera (the controls have been explained above) and pivot camera (where the camera pivots around the center of the scene). If the camera is in pivot mode, the user can also modify it's radius from the center and if it auto rotates (and at which speed) or not (the user can rotate around the pivot with MOUSE LEFT similarly to the free camera).

Lights

Here the user can change the color of the directional light and of all point lights. Additionally, there is a button to turn off all point lights which sets their color to black thus giving no light.

OpenGL

Here the user can see all the information about the current version of OpenGL & GLSL and GPU information. Moreover, a list of all available extension of OpenGL.

Performance

Check the current framerate (FPS), frametime (in seconds), render loop time (in milliseconds) and time since startup (in seconds).