Fixed depth range of WebVR projection matrices

third_party/WebKit/Source/modules/vr/VRFrameData.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/vr/VRFrameData.h"
 
 #include "modules/vr/VREyeParameters.h"
 #include "modules/vr/VRPose.h"
 
 #include <cmath>
@@ skipping 20 matching lines @@
   out[0] = xScale;
   out[1] = 0.0f;
   out[2] = 0.0f;
   out[3] = 0.0f;
   out[4] = 0.0f;
   out[5] = yScale;
   out[6] = 0.0f;
   out[7] = 0.0f;
   out[8] = -((leftTan - rightTan) * xScale * 0.5);
   out[9] = ((upTan - downTan) * yScale * 0.5);
-  out[10] = depthFar / (depthNear - depthFar);
+  out[10] = (depthNear + depthFar) / (depthNear - depthFar);
   out[11] = -1.0f;
   out[12] = 0.0f;
   out[13] = 0.0f;
-  out[14] = (depthFar * depthNear) / (depthNear - depthFar);
+  out[14] = (2 * depthFar * depthNear) / (depthNear - depthFar);
   out[15] = 0.0f;
 }
 
 // Create a matrix from a rotation and translation.
 void matrixfromRotationTranslation(DOMFloat32Array* outArray,
                                    const mojo::WTFArray<float>& rotation,
                                    const mojo::WTFArray<float>& translation) {
   // Quaternion math
   float x = rotation.is_null() ? 0.0f : rotation[0];
   float y = rotation.is_null() ? 0.0f : rotation[1];
@@ skipping 155 matching lines @@
 
 DEFINE_TRACE(VRFrameData) {
   visitor->trace(m_leftProjectionMatrix);
   visitor->trace(m_leftViewMatrix);
   visitor->trace(m_rightProjectionMatrix);
   visitor->trace(m_rightViewMatrix);
   visitor->trace(m_pose);
 }
 
 }  // namespace blink