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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "content/browser/vr/android/cardboard/cardboard_vr_device.h" | |
| 6 | |
| 7 #include <math.h> | |
| 8 #include <algorithm> | |
| 9 | |
| 10 #include "base/android/jni_android.h" | |
| 11 #include "base/android/jni_array.h" | |
| 12 #include "base/android/jni_string.h" | |
| 13 #include "base/strings/string_util.h" | |
| 14 #include "base/strings/utf_string_conversions.h" | |
| 15 #include "base/time/time.h" | |
| 16 #include "jni/CardboardVRDevice_jni.h" | |
| 17 | |
| 18 using base::android::AttachCurrentThread; | |
| 19 | |
| 20 namespace content { | |
| 21 | |
| 22 namespace { | |
| 23 | |
| 24 // Source: | |
| 25 // http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQu
aternion/ | |
| 26 VRVector4Ptr MatrixToOrientationQuat(const float m[16]) { | |
| 27 VRVector4Ptr out = VRVector4::New(); | |
| 28 float trace = m[0] + m[5] + m[10]; | |
| 29 float root; | |
| 30 if (trace > 0.0f) { | |
| 31 root = sqrtf(1.0f + trace) * 2.0f; | |
| 32 out->x = (m[9] - m[6]) / root; | |
| 33 out->y = (m[2] - m[8]) / root; | |
| 34 out->z = (m[4] - m[1]) / root; | |
| 35 out->w = 0.25f * root; | |
| 36 } else if ((m[0] > m[5]) && (m[0] > m[10])) { | |
| 37 root = sqrtf(1.0f + m[0] - m[5] - m[10]) * 2.0f; | |
| 38 out->x = 0.25f * root; | |
| 39 out->y = (m[1] + m[4]) / root; | |
| 40 out->z = (m[2] + m[8]) / root; | |
| 41 out->w = (m[9] - m[6]) / root; | |
| 42 } else if (m[5] > m[10]) { | |
| 43 root = sqrtf(1.0f + m[5] - m[0] - m[10]) * 2.0f; | |
| 44 out->x = (m[1] + m[4]) / root; | |
| 45 out->y = 0.25f * root; | |
| 46 out->z = (m[6] + m[9]) / root; | |
| 47 out->w = (m[2] - m[8]) / root; | |
| 48 } else { | |
| 49 root = sqrtf(1.0f + m[10] - m[0] - m[5]) * 2.0f; | |
| 50 out->x = (m[2] + m[8]) / root; | |
| 51 out->y = (m[6] + m[9]) / root; | |
| 52 out->z = 0.25f * root; | |
| 53 out->w = (m[4] - m[1]) / root; | |
| 54 } | |
| 55 | |
| 56 return out.Pass(); | |
| 57 } | |
| 58 | |
| 59 } // namespace | |
| 60 | |
| 61 bool CardboardVRDevice::RegisterCardboardVRDevice(JNIEnv* env) { | |
| 62 return RegisterNativesImpl(env); | |
| 63 } | |
| 64 | |
| 65 CardboardVRDevice::CardboardVRDevice(VRDeviceProvider* provider) | |
| 66 : VRDevice(provider), frame_index_(0) { | |
| 67 j_cardboard_device_.Reset(Java_CardboardVRDevice_create( | |
| 68 AttachCurrentThread(), base::android::GetApplicationContext())); | |
| 69 } | |
| 70 | |
| 71 CardboardVRDevice::~CardboardVRDevice() { | |
| 72 Java_CardboardVRDevice_stopTracking(AttachCurrentThread(), | |
| 73 j_cardboard_device_.obj()); | |
| 74 } | |
| 75 | |
| 76 VRDeviceInfoPtr CardboardVRDevice::GetVRDevice() { | |
| 77 VRDeviceInfoPtr device = VRDeviceInfo::New(); | |
| 78 | |
| 79 JNIEnv* env = AttachCurrentThread(); | |
| 80 | |
| 81 ScopedJavaLocalRef<jstring> j_device_name = | |
| 82 Java_CardboardVRDevice_getDeviceName(env, j_cardboard_device_.obj()); | |
| 83 device->deviceName = | |
| 84 base::android::ConvertJavaStringToUTF8(env, j_device_name.obj()); | |
| 85 | |
| 86 ScopedJavaLocalRef<jfloatArray> j_fov(env, env->NewFloatArray(4)); | |
| 87 Java_CardboardVRDevice_getFieldOfView(env, j_cardboard_device_.obj(), | |
| 88 j_fov.obj()); | |
| 89 | |
| 90 std::vector<float> fov; | |
| 91 base::android::JavaFloatArrayToFloatVector(env, j_fov.obj(), &fov); | |
| 92 | |
| 93 device->hmdInfo = VRHMDInfo::New(); | |
| 94 VRHMDInfoPtr& hmdInfo = device->hmdInfo; | |
| 95 | |
| 96 hmdInfo->leftEye = VREyeParameters::New(); | |
| 97 hmdInfo->rightEye = VREyeParameters::New(); | |
| 98 VREyeParametersPtr& leftEye = hmdInfo->leftEye; | |
| 99 VREyeParametersPtr& rightEye = hmdInfo->rightEye; | |
| 100 | |
| 101 leftEye->recommendedFieldOfView = VRFieldOfView::New(); | |
| 102 leftEye->recommendedFieldOfView->upDegrees = fov[0]; | |
| 103 leftEye->recommendedFieldOfView->downDegrees = fov[1]; | |
| 104 leftEye->recommendedFieldOfView->leftDegrees = fov[2]; | |
| 105 leftEye->recommendedFieldOfView->rightDegrees = fov[3]; | |
| 106 | |
| 107 // Cardboard devices always assume a mirrored FOV, so this is just the left | |
| 108 // eye FOV with the left and right degrees swapped. | |
| 109 rightEye->recommendedFieldOfView = VRFieldOfView::New(); | |
| 110 rightEye->recommendedFieldOfView->upDegrees = fov[0]; | |
| 111 rightEye->recommendedFieldOfView->downDegrees = fov[1]; | |
| 112 rightEye->recommendedFieldOfView->leftDegrees = fov[3]; | |
| 113 rightEye->recommendedFieldOfView->rightDegrees = fov[2]; | |
| 114 | |
| 115 // Cardboard does not support configurable FOV. | |
| 116 leftEye->maximumFieldOfView = leftEye->recommendedFieldOfView.Clone(); | |
| 117 rightEye->maximumFieldOfView = rightEye->recommendedFieldOfView.Clone(); | |
| 118 leftEye->minimumFieldOfView = leftEye->recommendedFieldOfView.Clone(); | |
| 119 rightEye->minimumFieldOfView = rightEye->recommendedFieldOfView.Clone(); | |
| 120 | |
| 121 float ipd = Java_CardboardVRDevice_getIpd(env, j_cardboard_device_.obj()); | |
| 122 | |
| 123 leftEye->eyeTranslation = VRVector3::New(); | |
| 124 leftEye->eyeTranslation->x = ipd * -0.5f; | |
| 125 leftEye->eyeTranslation->y = 0.0f; | |
| 126 leftEye->eyeTranslation->z = 0.0f; | |
| 127 | |
| 128 rightEye->eyeTranslation = VRVector3::New(); | |
| 129 rightEye->eyeTranslation->x = ipd * 0.5f; | |
| 130 rightEye->eyeTranslation->y = 0.0f; | |
| 131 rightEye->eyeTranslation->z = 0.0f; | |
| 132 | |
| 133 ScopedJavaLocalRef<jintArray> j_screen_size(env, env->NewIntArray(2)); | |
| 134 Java_CardboardVRDevice_getScreenSize(env, j_cardboard_device_.obj(), | |
| 135 j_screen_size.obj()); | |
| 136 | |
| 137 std::vector<int> screen_size; | |
| 138 base::android::JavaIntArrayToIntVector(env, j_screen_size.obj(), | |
| 139 &screen_size); | |
| 140 | |
| 141 leftEye->renderRect = VRRect::New(); | |
| 142 leftEye->renderRect->x = 0; | |
| 143 leftEye->renderRect->y = 0; | |
| 144 leftEye->renderRect->width = screen_size[0] / 2.0; | |
| 145 leftEye->renderRect->height = screen_size[1]; | |
| 146 | |
| 147 rightEye->renderRect = VRRect::New(); | |
| 148 rightEye->renderRect->x = screen_size[0] / 2.0; | |
| 149 rightEye->renderRect->y = 0; | |
| 150 rightEye->renderRect->width = screen_size[0] / 2.0; | |
| 151 rightEye->renderRect->height = screen_size[1]; | |
| 152 | |
| 153 return device.Pass(); | |
| 154 } | |
| 155 | |
| 156 VRSensorStatePtr CardboardVRDevice::GetSensorState() { | |
| 157 VRSensorStatePtr state = VRSensorState::New(); | |
| 158 | |
| 159 state->timestamp = base::Time::Now().ToJsTime(); | |
| 160 state->frameIndex = frame_index_; | |
| 161 | |
| 162 JNIEnv* env = AttachCurrentThread(); | |
| 163 ScopedJavaLocalRef<jfloatArray> j_head_matrix(env, env->NewFloatArray(16)); | |
| 164 Java_CardboardVRDevice_getSensorState(env, j_cardboard_device_.obj(), | |
| 165 j_head_matrix.obj()); | |
| 166 | |
| 167 std::vector<float> head_matrix; | |
| 168 base::android::JavaFloatArrayToFloatVector(env, j_head_matrix.obj(), | |
| 169 &head_matrix); | |
| 170 | |
| 171 state->orientation = MatrixToOrientationQuat(&head_matrix[0]); | |
| 172 | |
| 173 state->position = VRVector3::New(); | |
| 174 state->position->x = -head_matrix[12]; | |
| 175 state->position->y = head_matrix[13]; | |
| 176 state->position->z = head_matrix[14]; | |
| 177 | |
| 178 frame_index_++; | |
| 179 | |
| 180 return state.Pass(); | |
| 181 } | |
| 182 | |
| 183 void CardboardVRDevice::ResetSensor() { | |
| 184 Java_CardboardVRDevice_resetSensor(AttachCurrentThread(), | |
| 185 j_cardboard_device_.obj()); | |
| 186 } | |
| 187 | |
| 188 } // namespace content | |
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Chromium Code Reviews
Issue 1198513003:
Revert "Adding Chrome-side WebVR interface and Cardboard implementation" (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master