Building camera in a program

Aravindhan AFinal year CSE | SMITabout.me/aravindhan

Why build camera?

To have finite control over camera movements, we create and manipulate our own camera in a program

Created through a camera class which can do all functions

Camera functions

Cam.set(eye,look,up);Cam.slide(-1,0,-2);Cam.roll(30);Cam.yaw(20);

Camera functions

setModelViewMatrix()glMatrixMode(GL_PROJECTION)GlLoadIdentity()myKeyboard()

Model-view matrix

Position the camera By default, camera is at origin, looking in –z dir To “move the camera”, set up a modelview matrix that

moves objects that are drawn Ignore Z-coordinate when drawing

LookAt function Most 3D toolkits let you position the camera by

setting eyepoint, lookpoint, and up direction lookAt(Xeye, Yeye, Zeye, Xat, Yat, Zat,

Xup, Yup, Zup): Effect: set the

modelview matrix

LookAt function

Other viewing APIs

Thank you!