LabA01 Drawing 2D Triangles

Lab Tutorial: Drawing Triangles with OpenGL, GLEW, and GLFW

Objective

This tutorial guides you through rendering triangles using OpenGL, Direct3D, WebGL or Vulkan

Prerequisites

• C++ development environment (e.g., Visual Studio, Code::Blocks, or GCC)

• OpenGL, GLEW, and GLFW installed

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Tutorial

Step 1: Setting Up the Environment

Step 2: Drawing Raw Triangles

Step 3: Drawing Indexed Triangles

Step 4: Drawing Indexed Triangles with Vertex Colours

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Exercises

Basic Exercises

1. Modify the Triangle Colour – Change the colours of the triangle vertices to create a gradient effect.

2. Change Triangle Positions – Adjust the vertex coordinates to move the triangle around the screen.

3. Add More Triangles – Extend the program to render multiple triangles instead of just one.

4. Resize the Window – Modify the viewport and projection settings to maintain the correct aspect ratio when resizing.

Intermediate Exercises

1. Revise the code to draw a 3D pyramid (no need to touch projections)

2. Revise the code to draw a 3D cube (no need to touch projections)