WebGL Insights

370 23. Designing Cameras for WebGL Applications

23.4 Cameras in WebGL Applications

Having a camera matrix allows us to move through the world and look around objects.

A moving camera metaphor is more intuitive than shiing and rotating the world in the

opposite direction. Nonetheless, geometric transformations, such as motion of 3D objects

in the virtual world (e.g., actors, characters, etc.) are point of view independent. ese

transformations need to be multiplied with the model-view matrix. Generally speaking,

for every frame, we would:

a. Update the camera matrix based on user interaction events (e.g., mouse, key-

board, gestures, etc.)