Graphical Computation Assignment

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Used Technologies 💻

• FreeGlut/Glut Libraries

• Header Files stored in Libraries folder

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Plan 📝

This project was subdivided in two different and independent steps.

• First Step:

  • Build a graphical ambient where I manually program concepts like:

    • Objects Building
    • Visualization Projection
    • Animations
    • Illuminations
    • Textures
    • Transparency
    • Materials

  • To concretize this step it was proposed to build a door. But, as I don't like usual doors, I decided to build a Futuristic Door.

• Second Step:

  • Build a simple program just to take advantage of Vertex and Fragment Shaders, applying same way some Animation, Illumination, Textures and Transparency concepts.

    What's a shader?

    Until now we've just seen code that runs in CPU, now, using shaders, we have coding runing in the graphics card.

    However, shaders aren't easy to program, debug or even fix, since they aren't such easily controlled.

    I used two different types of shaders:

    • Fragment Shaders Responsible of color and illumination present in all fragments belonging to a certain object.
    • Vertex Shaders Responsible of all vertex positions belonging to a certain object.

    So, what is the advantage using shaders? Mainly, performance! All those efforts compensates if the software runs faster!

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Step 1️⃣ - Futuristic Door

About 📋

• Objects Building:

  • 2 independent blocks acting like components of the door
  • 2 smaller blocks acting like buttons
  • 3 bigger blocks acting like wall
  • 1 horizontal surface acting like ground
  • 1 huge sphere acting like "world"

• Visualization Projection:

  • Perspective, looking at the referential center.

• Animations:

  • 90º Rotation of the upper door
  • Horizontal Translation of the lower door
  • Scaling of the buttons when automated opening/closing is done or being done

• Illumination:

  • Ambient lighting (it kinda simulates day and night)
  • 2 lights are used: directional (behind the door) and a punctual (in front of the door) following Phong Reflection Model, with independent colorations.
  • Each light contains 3 different Reflection components: Ambient, Difuse and Specular.

  

• Textures:

  • All images were taken from Google Images and converted into bmp format.
  • 1 stone texture used in the wall
  • 1 wood texture used in the door and buttons
  • 1 gravel texture use in the floor surface
  • 1 city texture use in the ambient sphere

• Transparency:

  • It can be turned on/off, affecting only the floor and the buttons

• Materials

  • Affects once again the floor and the buttons
  • Can be changed within a range of 18 different materials
  • It is accessed from materials.h file present in Libraries folder

Interactions Allowed 👥

- Tutorial/Info Mode [Space]
- Zoom [Z/X]
- Move Upper Door Manually [Q/W] and Automatically [E]
- Move Lower Door Manually [A/S] and Automatically [D]
- Turn on/off Transparency [K]
- Change Lights' Components [R/G/B]
- Change Lights' Intensities [T/L]
- Change Floor Mesh [J/O/P]
- Change Floor and Buttons' Materials [M]
- Change Floor and Buttons' Specular Coeficient [I]

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Step 2️⃣ - Windows 2000

About 📋

• Objects Building

  • A inclined cube, rotated 45ª by X and Z referentials

• Animations

  • Constant rotation by Y referential done in OpenGL
  • Constant growing and degrowing done in Vertex Shader

• Illumination

  • It can be alternated between Toon illumination or Phong's Difuse Component
  • The illumination process is done in Fragment Shader

• Textures

  • A steel bmp image is applied to all cube's faces

• Transparency

  • It can be turned on/off, affecting the entire cube

Interactions Allowed 👥

- Stop Animation [S]
- Turn on/off Transparency [K]
- Change Light's Components [R/G/B]
- Change Illumination Phong/Toon [1/2]

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Contributors ✨

Licenciatura em Engenharia Informática - Universidade de Coimbra
Computação Gráfica - 2020/2021
Coimbra, 23 de janeiro de 2021

🎓 Rodrigo Fernando Henriques Sobral

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License 🔗

Have a look at the license file for details

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