Triangles & Models

• Understand the TRIANGLES primitive
• Understand the meaning of “Winding” and distinguish between clockwise and counterclockwise winding
• Be able to use the glFrontFace amd glPolyGoneMode functions in this context
• Have used TRIANGLE_FAN and TRIANGLE_STRIP primitives
• Review the need for a model, and evolve a number of approaches: - Model 1: Define a simple data structure for loading a model - Model 2: Employ STL - Model 3: Encapsulate the data structure within a set of classes, allocating behaviors appropriately - Model 4: Make file formal extensible

Objectives

• Experiment with TRIANGLE primitives
• Explore the implications of winding, and in particular the glFrontFace and glPplygonMode
• Review a solution to the model load problem in the last lab
• Recode this solution using more modern data structures

00: Objectives

• Review the need for a model
• Review C++ stream input classes
• Evolve a model format in over a number of iterations:
  • Model 1: Define a simple data structure for loading a model
  • Model 2: Employ STL
  • Model 3: Encapsulate the data structure within a set of classes, allocating behaviors appropriately
  • Model 4: Make file formal extensible