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1 #include <stdio.h>
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2 #include "vr.h"
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3 #include "vr_impl.h"
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4
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5 static bool init_ovr();
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6
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7 VRContext vr_ctx;
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8
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9 extern "C" int vr_init(enum vr_init_mode mode)
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10 {
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11 if(!init_ovr()) {
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12 return -1;
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13 }
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14 return 0;
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15 }
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16
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17 extern "C" void vr_shutdown(void)
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18 {
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19 //System::Destroy();
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20 }
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21
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22 static bool init_ovr()
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23 {
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24 // initialize Oculus SDK
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25 System::Init();
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26 if(!(vr_ctx.ovr_devman = DeviceManager::Create())) {
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27 fprintf(stderr, "failed to create OVR device manager\n");
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28 return false;
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29 }
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30
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31 // create the display device
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32 if(!(vr_ctx.ovr_hmd_dev = vr_ctx.ovr_devman->EnumerateDevices<HMDDevice>().CreateDevice())) {
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33 fprintf(stderr, "no oculus rift devices found\n");
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34 return false;
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35 }
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36
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37 HMDInfo info;
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38 if(vr_ctx.ovr_hmd_dev->GetDeviceInfo(&info)) {
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39 printf("oculus device info:\n");
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40 printf(" name: %s\n", info.DisplayDeviceName);
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41 printf(" ipd: %f\n", info.InterpupillaryDistance);
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42 printf(" distortion: %f %f %f %f\n", info.DistortionK[0],
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43 info.DistortionK[1], info.DistortionK[2], info.DistortionK[3]);
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44 }
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45
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46 // get the sensor device
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47 if(!(vr_ctx.ovr_sensor_dev = vr_ctx.ovr_hmd_dev->GetSensor())) {
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48 fprintf(stderr, "failed to get oculus sensor device\n");
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49 return false;
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50 }
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51
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52 SensorInfo sinfo;
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53 if(vr_ctx.ovr_sensor_dev->GetDeviceInfo(&sinfo)) {
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54 printf("oculus sensor device info:\n");
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55 printf(" name: %s\n", sinfo.ProductName);
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56 }
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57
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58 vr_ctx.ovr_sfusion.AttachToSensor(vr_ctx.ovr_sensor_dev);
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59
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60 // calculate and store viewing parameters
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61 float vhalfsz = info.VScreenSize * 0.5;
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62 vr_ctx.info.fov = 2.0 * atan(vhalfsz / info.EyeToScreenDistance);
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63
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64 vr_ctx.info.width = info.HResolution;
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65 vr_ctx.info.height = info.VResolution;
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66 vr_ctx.info.aspect = (float)vr_ctx.info.width / (float)vr_ctx.info.height;
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67
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68 vr_ctx.info.ipd = info.InterpupillaryDistance;
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69 for(int i=0; i<4; i++) {
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70 vr_ctx.info.distort[i] = info.DistortionK[i];
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71 }
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72
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73 return true;
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74 }
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75
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76 extern "C" int vr_get_width(void)
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77 {
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78 return vr_ctx.info.width;
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79 }
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80
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81 extern "C" int vr_get_height(void)
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82 {
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83 return vr_ctx.info.height;
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84 }
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85
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86 extern "C" float vr_get_fov(void)
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87 {
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88 return vr_ctx.info.fov;
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89 }
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90
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91 extern "C" float vr_get_aspect(void)
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92 {
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93 return vr_ctx.info.aspect;
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94 }
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95
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96 extern "C" void vr_set_eyedist(float ipd)
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97 {
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98 vr_ctx.info.ipd = ipd;
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99 }
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100
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101 extern "C" float vr_get_eyedist(void)
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102 {
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103 return vr_ctx.info.ipd;
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104 }
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105
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106 extern "C" void vr_set_distort(const float *coef)
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107 {
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108 memcpy(vr_ctx.info.distort, coef, sizeof vr_ctx.info.distort);
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109 }
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110
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111 extern "C" void vr_get_distort(float *coef)
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112 {
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113 memcpy(coef, vr_ctx.info.distort, sizeof vr_ctx.info.distort);
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114 }
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115
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116 extern "C" void vr_set_prediction_sec(float dt)
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117 {
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118 vr_ctx.ovr_sfusion.SetPrediction(dt);
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119 }
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120
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121 extern "C" float vr_get_prediction_sec(void)
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122 {
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123 return vr_ctx.ovr_sfusion.GetPredictionDelta();
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124 }
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125
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126 extern "C" void vr_get_translation(float *offs)
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127 {
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128 // current oculus devkit doesn't do translation
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129 offs[0] = offs[1] = offs[2] = 0.0f;
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130 }
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131
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132 extern "C" void vr_get_rotation(float *quat)
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133 {
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134 Quatf oq = vr_ctx.ovr_sfusion.GetPredictedOrientation();
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135 quat[0] = oq.x;
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136 quat[1] = oq.y;
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137 quat[2] = oq.z;
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138 quat[3] = oq.w;
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139 }
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140
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141 extern "C" void vr_get_rotation_euler(float *euler)
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142 {
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143 Quatf oq = vr_ctx.ovr_sfusion.GetPredictedOrientation();
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144 oq.GetEulerAngles<Axis_Y, Axis_X, Axis_Z>(euler + 1, euler, euler + 2);
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145 }
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