Intro to Computer Graphics Coursework

Storage repository for the 4 assignments I completed for the Intro to Computer Graphics course I took in Fall 2017.

For additional images, click here to go to my ArtStation.

---

Assignment 1: Hilbert Curve

Features:

• Rendering done with OpenGL.
• Draws first to tenth order Hilbert Curves using OpenGL's lines as well as by using thin triangles.

Multi-colored 7th order Hilbert Curve using thin triangles for the lines:

Credits:

• Regarding the software implementation the following resources were invaluable:
  • For understanding OpenGL: https://learnopengl.com
  • For input: http://www.glfw.org/docs/latest/input_guide.html
  • For the window: http://www.glfw.org/docs/latest/window_guide.html

---

Assignment 2: Image Manipulation

Features:

• Rendering done with OpenGL.
• Draw multi-colored Catmull-Rom curves and loops.
• Apply image filters (grayscale and 2-bit quantization).
• Move and scale the image.

Multi-colored Catmull-Rom spline drawing and 2-bit image quantization:

Original image by nexus user realdreadstar (check credits section):

Grayscale filter uses NTSC conversion weights:

2-bit image quantization:

Credits:

• Original image is by realdreadstar/Natty Dread and he made it by setting up a custom scene in The Witcher 3 and taking a screenshot of it.
  • Link to realdreadstar's version on the Nexus
  • Link to Natty Dread's version on Flickr
  • Regarding the software implementation the following resources were invaluable:
  • For understanding OpenGL: https://learnopengl.com
  • For input: http://www.glfw.org/docs/latest/input_guide.html
  • For the window: http://www.glfw.org/docs/latest/window_guide.html
  • Lines drawn using: https://vicrucann.github.io/tutorials/osg-shader-3dlines/

---

Assignment 3: Model Viewer and Basic Editor

Features:

• Rendering done with OpenGL.
• Models can be selected by mouse clicking on them.
• Selected models can be modified by rotating, scaling, translating, duplicating, or turning various textures on or off.
• Supports basic OBJ features and models/textures can be imported with a config file or command-line arguments.

Lighting model:

• Phong lighting using diffuse, specular and ambient occlusion textures.

Scene was built in engine using the model transformation tools I implemented:

Credits:

• All models and textures shown in the image were provided to us by the TA as part of the course.
• Regarding the software implementation the following resources were invaluable:
  • For understanding OpenGL: https://learnopengl.com
  • For input: http://www.glfw.org/docs/latest/input_guide.html
  • For the window: http://www.glfw.org/docs/latest/window_guide.html
  • For being able to select models by clicking on them: https://en.wikibooks.org/wiki/OpenGL_Programming/Object_selection

---

Assignment 4: Whitted Ray Tracer

Features:

• CPU only and thus does not make use of OpenGL in any way.
• Ray intersection test for spheres and triangles.
• Functional shadow, reflection, refraction, and diffuse bounces.
• Gamma correction.
• Procedural textures.
• Directional and point lights.
• Supports basic OBJ features and models can be loaded with a config file.

My custom scene:

Default Cornell box:

Credits:

• All models either made by me or specified in the assignment description.
• Most of the ray tracer code was based on https://www.scratchapixel.com

---