Project 1a ©Jorg Peters

Points: 35

Purpose

Learn how to use affine transformations to position objects in 3-space

Resources

OpenGL Transformations and Matrices - Moving/scaling/rotating objects
OpenGL Shading - Lighting up the scene
GLFW Input Handling - adding keyboard inputs
GLM - Convenient OpenGL Mathematics library
GLSL Data Types - Useful to know for shader programming

Set Up

Use one of: OpenGL or webGL
For openGL use this code base
For webGL started code is not provided.

Task 1: Grid

Points: 5

Draw an integer grid on the Y=0-plane for the rectangle (-5,0,-5) to (+5,0,+5).
Draw the positive X axis in red, the Y axis in green and the Z axis in blue. Only draw the positive portion of each axis, of length 5.

Task 2: Camera Rotations

Points: 5

Use Perspective projection

Place the camera so you can see the whole scene: use glm::LookAt to generate the View matrix.

Key C selects the camera.

Keys ← and → move the camera along the blue circle parallel to the equator.

Keys ↑ and ↓ rotate the camera along the red circle orthogonal to the equator.

Choose the "up" direction so the camera always points to the origin.

Task 3: Draw the robot arm

Points: 25

The robot arm consists of the following parts:

Base: truncated tetrahedron placed on the x-z-plane
Arm1: rectangular box emmanating from and hinged at the center of Base.
Joint: dodecahedron of appropriate radius at the other end of Arm1.
Arm2: cylinder connected to the center of Joint.

Create triangulated objects in the .obj format, e.g. by using Blender. Hint: generate correct normals for later use.

To load .obj files use the simple supplied obj loader

bool loadOBJ(
	 const char *path,
	 std::vector &out_vertices,
	 std::vector &out_uvs,
	 std::vector &out_normals,
	 std::vector &out_indices)

or use tinyobjloader (usage best learned by looking at the examples on github)
or find alternative online

WHAT TO SUBMIT

Your modified source files (cpp, shader, html, obj, as appropriate)
Filepaths to load models must be relative to the source directory (no absolute paths specific to your PC).
A link to a screen capture of your running program showcasing the implementation of all of the tasks using recordit (Mac, Win) or similar software. List tasks in order and demonstrate or state that you did not implement (and briefly why).