Pro OpenGL ES for iOS

CHAPTER 2: All That Math Jazz (^43)
PUSH TO TALK SWITCH PARAMETERS
ROTATION CONTROL
ROTATION CONTROL PARAMETERS
HARD STOP
DIRECT SWITCH ACTUATION
SOFT STOP
BREAKOUT SWITCH ACTUATION
CONTROLLER LOCK TO ARM
DISPLACEMENT
11 5±0.50
≈11 0º
10±1º
1.5± 0.5º
50.0º
TRAVEL PRIOR TO SWITCH ACTUATION
TRAVEL TO HARDSTOP
MAXIMUM TORQUE
8.0° MIN
25.0° MAX
1.0 POUND INCHES Zc
Xc

• YAW Yc


• PITCH
  PITCH PIVOT
  (PALM CENTER)
  4.0’
  ROLL PIVOT
  YAW PIVOT
  110º
  SCS-2100D
  ROLL
  +ANGULAR VELOCITY-
  +ATTITUDE ERROR-
  FLIGHT DIRECTOR ATTITUDE INDICATOR
  PITCH & YAW ROLL INDEX
  INDEX
  NOTE:
  ALL POLARITIES INDICATE
  VEHICLE DYNAMICS +ATTITUDE ERROR-YAW
  +ANGULAR VELOCITY-
  ROLL TOTAL
  ATTITUDE SCALE
  SCS-2100D

• P
  I
  T
  C
  H


• 
  

+

ATTITUDE

ERROR

ANGULAR
VELOCITY

• EULER ATTITUDE ON BALL
  PITCH - q = 014º
  YAW - y = 034º
  ROLL - f = 330º

Figure 2- 6. Illustration of the Apollo’s frame of reference, its joystick, and artificial horizon

Picture This: Projecting the Object onto the Screen

Whew, even after all of that we’re not quite done yet. Once you have performed all the
rotations, scaling, and translations of your objects, you still need to get them projected
onto your screen. Converting a 3D scene onto a 2D surface has troubled mankind since