From 32fc8f3a64cfeee8936af98ae49f8e7c8dfe982f Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Sat, 21 Mar 2015 04:31:27 +0100
Subject: Bug 1116 - Add OculusVR DK2 Support - Part-1 (DK2 on DK1 SDK w/o Eye
 Tracker)

- DK2's screen on X11 (at least) starts in rotated mode,
  detect and apply MonitorDevice rotation via NEWT's OpenGL StereoDeviceUtil

- Move StereoDevice.Config -> StereoDeviceConfig

- Expose generic StereoDevice to public: GenericStereoDeviceConfig + GenericStereoDeviceFactory

- GenericStereoDeviceFactory exposes public GenericStereoDeviceConfig creation
  for mono, sbs-stereo and lense-sbs-stereo w/ diff. parameters.

- Pass eye surface/texture size for each eye from device to renderer,
  instead of assuming unified values.

- Unify GenericStereoDevice.createRenderer(..) and OVRStereoDevice.createRenderer(..) code
---
 .../com/jogamp/opengl/util/stereo/StereoUtil.java  | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/jogl/classes/com/jogamp/opengl/util/stereo/StereoUtil.java')

diff --git a/src/jogl/classes/com/jogamp/opengl/util/stereo/StereoUtil.java b/src/jogl/classes/com/jogamp/opengl/util/stereo/StereoUtil.java
index 3e4e7ccd9..b0ca4ddb2 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/stereo/StereoUtil.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/stereo/StereoUtil.java
@@ -34,6 +34,36 @@ import com.jogamp.opengl.util.CustomGLEventListener;
 import com.jogamp.opengl.util.stereo.StereoDeviceRenderer.Eye;
 
 public class StereoUtil {
+    /**
+     * Return the vertical pupil center from the screen top in the range [0..1].
+     * @param screenHeightInMeters
+     * @param pupilCenterFromScreenTopInMeters
+     */
+    public static float getVertPupilCenterFromTop(final float screenHeightInMeters, final float pupilCenterFromScreenTopInMeters) {
+        return pupilCenterFromScreenTopInMeters / screenHeightInMeters;
+    }
+
+    /**
+     * Return the horizontal pupil center from the left side for both eyes in the range [0..1].
+     * <pre>
+            <-------------left eye------------->|                       |<-----------right eye-------------->
+            <------------------------------------screenSizeInMeters.Width----------------------------------->
+                                       <------interpupillaryDistanceInMeters------>
+            <--centerFromLeftInMeters->
+                                       ^
+                                 center of pupil
+     * </pre>
+     *
+     * @param screenWidthInMeters
+     * @param interpupillaryDistanceInMeters
+     */
+    public static float[] getHorizPupilCenterFromLeft(final float screenWidthInMeters, final float interpupillaryDistanceInMeters) {
+        final float visibleWidthOfOneEye = 0.5f * screenWidthInMeters;
+        final float leftPupilCenterFromLeftInMeters = ( screenWidthInMeters - interpupillaryDistanceInMeters ) * 0.5f;
+        final float rightPupilCenterFromMiddleInMeters = leftPupilCenterFromLeftInMeters + interpupillaryDistanceInMeters - visibleWidthOfOneEye;
+        return new float[] { leftPupilCenterFromLeftInMeters    / visibleWidthOfOneEye,
+                             rightPupilCenterFromMiddleInMeters / visibleWidthOfOneEye };
+    }
 
     /** See {@link StereoDeviceRenderer#getDistortionBits()}. */
     public static boolean usesBarrelDistortion(final int distortionBits) { return 0 != ( distortionBits & StereoDeviceRenderer.DISTORTION_BARREL ) ; }
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