160 lines
6.6 KiB
C++
160 lines
6.6 KiB
C++
/*************************************************************************/
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/* mobile_vr_interface.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef MOBILE_VR_INTERFACE_H
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#define MOBILE_VR_INTERFACE_H
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#include "servers/xr/xr_interface.h"
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#include "servers/xr/xr_positional_tracker.h"
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/**
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@author Bastiaan Olij <mux213@gmail.com>
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The mobile interface is a native VR interface that can be used on Android and iOS phones.
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It contains a basic implementation supporting 3DOF tracking if a gyroscope and accelerometer are
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present and sets up the proper projection matrices based on the values provided.
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We're planning to eventually do separate interfaces towards mobile SDKs that have far more capabilities and
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do not rely on the user providing most of these settings (though enhancing this with auto detection features
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based on the device we're running on would be cool). I'm mostly adding this as an example or base plate for
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more advanced interfaces.
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*/
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class MobileVRInterface : public XRInterface {
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GDCLASS(MobileVRInterface, XRInterface);
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private:
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bool initialized = false;
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XRInterface::TrackingStatus tracking_state;
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// Just set some defaults for these. At some point we need to look at adding a lookup table for common device + headset combos and/or support reading cardboard QR codes
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double eye_height = 1.85;
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uint64_t last_ticks = 0;
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double intraocular_dist = 6.0;
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double display_width = 14.5;
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double display_to_lens = 4.0;
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double oversample = 1.5;
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double k1 = 0.215;
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double k2 = 0.215;
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double aspect = 1.0;
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// at a minimum we need a tracker for our head
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Ref<XRPositionalTracker> head;
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Transform3D head_transform;
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/*
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logic for processing our sensor data, this was originally in our positional tracker logic but I think
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that doesn't make sense in hindsight. It only makes marginally more sense to park it here for now,
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this probably deserves an object of its own
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*/
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Vector3 scale_magneto(const Vector3 &p_magnetometer);
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Basis combine_acc_mag(const Vector3 &p_grav, const Vector3 &p_magneto);
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int mag_count = 0;
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bool has_gyro = false;
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bool sensor_first = false;
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Vector3 last_accerometer_data;
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Vector3 last_magnetometer_data;
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Vector3 mag_current_min;
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Vector3 mag_current_max;
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Vector3 mag_next_min;
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Vector3 mag_next_max;
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///@TODO a few support functions for trackers, most are math related and should likely be moved elsewhere
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float floor_decimals(const float p_value, const float p_decimals) {
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float power_of_10 = pow(10.0f, p_decimals);
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return floor(p_value * power_of_10) / power_of_10;
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};
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Vector3 floor_decimals(const Vector3 &p_vector, const float p_decimals) {
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return Vector3(floor_decimals(p_vector.x, p_decimals), floor_decimals(p_vector.y, p_decimals), floor_decimals(p_vector.z, p_decimals));
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};
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Vector3 low_pass(const Vector3 &p_vector, const Vector3 &p_last_vector, const float p_factor) {
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return p_vector + (p_factor * (p_last_vector - p_vector));
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};
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Vector3 scrub(const Vector3 &p_vector, const Vector3 &p_last_vector, const float p_decimals, const float p_factor) {
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return low_pass(floor_decimals(p_vector, p_decimals), p_last_vector, p_factor);
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};
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void set_position_from_sensors();
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protected:
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static void _bind_methods();
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public:
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void set_eye_height(const double p_eye_height);
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double get_eye_height() const;
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void set_iod(const double p_iod);
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double get_iod() const;
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void set_display_width(const double p_display_width);
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double get_display_width() const;
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void set_display_to_lens(const double p_display_to_lens);
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double get_display_to_lens() const;
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void set_oversample(const double p_oversample);
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double get_oversample() const;
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void set_k1(const double p_k1);
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double get_k1() const;
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void set_k2(const double p_k2);
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double get_k2() const;
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virtual StringName get_name() const override;
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virtual uint32_t get_capabilities() const override;
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virtual TrackingStatus get_tracking_status() const override;
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virtual bool is_initialized() const override;
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virtual bool initialize() override;
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virtual void uninitialize() override;
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virtual Size2 get_render_target_size() override;
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virtual uint32_t get_view_count() override;
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virtual Transform3D get_camera_transform() override;
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virtual Transform3D get_transform_for_view(uint32_t p_view, const Transform3D &p_cam_transform) override;
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virtual CameraMatrix get_projection_for_view(uint32_t p_view, double p_aspect, double p_z_near, double p_z_far) override;
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virtual Vector<BlitToScreen> commit_views(RID p_render_target, const Rect2 &p_screen_rect) override;
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virtual void process() override;
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MobileVRInterface();
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~MobileVRInterface();
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};
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#endif // !MOBILE_VR_INTERFACE_H
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