Camera with Roll Pitch and Yaw

General Discussions
#1

wow the net is full cameras that support yaw and pitch… but not roll.

does anyone have a good example / tutorial or sample of a full yaw/pitch/roll camera?

thx
j.

#2

Here’s my code for the oculus rift with Z up using GL11:


            float yaw = MyOculusRift.getOR().getYawDegrees_LH();
            float pitch = MyOculusRift.getOR().getPitchDegrees_LH();
            float roll = MyOculusRift.getOR().getRollDegrees_LH();
            GL11.glRotatef(roll, 0, 0, 1);
            float originalX = POSITION.getX();
            float originalY = POSITION.getY();
            double length =
                FastMath.hypot(BufferedMathFunctions.cos(-yaw) * BufferedMathFunctions.sin(90 - pitch),
                    BufferedMathFunctions.sin(-yaw) * BufferedMathFunctions.sin(90 - pitch));
            if (leftEye) {
                POSITION.setX((float)(originalX - BufferedMathFunctions.cos(-yaw)
                    * BufferedMathFunctions.sin(90 - pitch)
                    / length
                    * MyOculusRift.getOR().getHMDInfo().InterpupillaryDistance
                    / 2));
                POSITION.setY((float)(originalY - BufferedMathFunctions.sin(-yaw)
                    * BufferedMathFunctions.sin(90 - pitch)
                    / length
                    * MyOculusRift.getOR().getHMDInfo().InterpupillaryDistance
                    / 2));
            } else {
                POSITION.setX((float)(originalX + BufferedMathFunctions.cos(-yaw)
                    * BufferedMathFunctions.sin(90 - pitch)
                    / length
                    * MyOculusRift.getOR().getHMDInfo().InterpupillaryDistance
                    / 4));
                POSITION.setY((float)(originalY + BufferedMathFunctions.sin(-yaw)
                    * BufferedMathFunctions.sin(90 - pitch)
                    / length
                    * MyOculusRift.getOR().getHMDInfo().InterpupillaryDistance
                    / 4));
            }
            GLU.gluLookAt(POSITION.getX(), POSITION.getY(), POSITION.getZ(), POSITION.getX()
                + BufferedMathFunctions.sin(-yaw)
                * BufferedMathFunctions.sin(90 - pitch), POSITION.getY()
                - BufferedMathFunctions.cos(-yaw)
                * BufferedMathFunctions.sin(90 - pitch), POSITION.getZ() - BufferedMathFunctions.cos(90 - pitch), 0, 0, 1);

Hope it helps!

Mike

#3

thanks for the code snippet…
I’ll review it but not sure it will work for what i need.

An FPS style camera usually moves on a plane and pitch but does not adjust for a roll.

The camera im looking to make need to be more “flight sim” in style. ie… the camera can bank and pull up and the relative direction has changed.

#4

you can take a look at the PerspectiveCamera class in the libgdx framework