Book Image

OpenGL Development Cookbook

By : Muhammad Mobeen Movania
Book Image

OpenGL Development Cookbook

By: Muhammad Mobeen Movania

Overview of this book

OpenGL is the leading cross-language, multi-platform API used by masses of modern games and applications in a vast array of different sectors. Developing graphics with OpenGL lets you harness the increasing power of GPUs and really take your visuals to the next level. OpenGL Development Cookbook is your guide to graphical programming techniques to implement 3D mesh formats and skeletal animation to learn and understand OpenGL. OpenGL Development Cookbook introduces you to the modern OpenGL. Beginning with vertex-based deformations, common mesh formats, and skeletal animation with GPU skinning, and going on to demonstrate different shader stages in the graphics pipeline. OpenGL Development Cookbook focuses on providing you with practical examples on complex topics, such as variance shadow mapping, GPU-based paths, and ray tracing. By the end you will be familiar with the latest advanced GPU-based volume rendering techniques.
Table of Contents (15 chapters)
OpenGL Development Cookbook
About the Author
About the Reviewers

Implementing the target camera

The target camera works the opposite way. Rather than the position, the target remains fixed, while the camera moves or rotates around the target. Some operations like panning, move both the target and the camera position together.

Getting ready

The following figure shows an illustration of a target camera. Note that the small box is the target position for the camera.

The code for this recipe resides in the Chapter2/TargetCamera directory. The CTargetCamera class is defined in the Chapter2/src/TargetCamera.[h/cpp] files. The class declaration is as follows:

class CTargetCamera : public CAbstractCamera
  void Update();
  void Rotate(const float yaw, const float pitch, const float roll);
  void SetTarget(const glm::vec3 tgt);
  const glm::vec3 GetTarget() const;
  void Pan(const float dx, const float dy);
  void Zoom(const float amount );
  void Move(const float dx, const float dz);