| // Copyright 2017 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef COBALT_INPUT_CAMERA_3D_H_ |
| #define COBALT_INPUT_CAMERA_3D_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/memory/ref_counted.h" |
| #include "cobalt/base/camera_transform.h" |
| #include "cobalt/input/input_poller.h" |
| #include "starboard/window.h" |
| #include "third_party/glm/glm/gtc/quaternion.hpp" |
| |
| namespace cobalt { |
| namespace input { |
| |
| // Obtains camera parameters from hardware input to render a 3D scene. |
| // Interface to the Web module and Renderer module. Some settings may not apply |
| // depending on the specfic hardware implementation, so their setter methods |
| // have empty default implementations. |
| class Camera3D : public base::RefCountedThreadSafe<Camera3D> { |
| public: |
| // The rotations around the axes are intrinsic, meaning they are applied in |
| // sequence, each on the rotated frame produced by the previous one. |
| enum CameraAxes { |
| // Applied around the Z axis. Restricted to [0deg, 360deg). |
| kCameraRoll = 0x00, |
| // Applied around the X axis. Restricted to [-90deg, 90deg) |
| kCameraPitch = 0x01, |
| // Applied around the Y axis. Restricted to [0deg, 360deg) |
| kCameraYaw = 0x02, |
| }; |
| |
| // Functions to map input keys to camera controls. |
| virtual void CreateKeyMapping(int keycode, uint32 camera_axis, |
| float degrees_per_second) { |
| } |
| virtual void ClearKeyMapping(int keycode) { |
| } |
| virtual void ClearAllKeyMappings() {} |
| |
| // Return the camera's current view direction. |
| virtual glm::quat GetOrientation() const = 0; |
| |
| // The above methods are meant as an interface for the Camera3D's WebAPI on |
| // the WebModule thread, but the methods below will be accessed on the |
| // renderer thread. So, all the methods on this class may be synchronized to |
| // guard against these potentially parallel accesses. It is expected that the |
| // renderer will call them at a higher frequency than the WebModule. |
| |
| // Updates the camera's perspective parameters. |
| virtual void UpdatePerspective(float width_to_height_aspect_ratio, |
| float vertical_fov) { |
| } |
| |
| // Returns the camera's view and projection matrices, setup according to the |
| // latest available orientation and perspective information. This queries the |
| // orientation from hardware inputs, and leaves it in the state of the class |
| // to be queried by GetOrientation(). |
| virtual base::CameraTransform GetCameraTransformAndUpdateOrientation() = 0; |
| |
| // Resets camera to default orientation. |
| virtual void Reset() {} |
| |
| virtual ~Camera3D() {} |
| |
| template <typename FloatType> |
| static FloatType DegreesToRadians(FloatType degrees) { |
| return (degrees / 360) * 2 * static_cast<FloatType>(M_PI); |
| } |
| |
| template <typename FloatType> |
| static FloatType RadiansToDegrees(FloatType radians) { |
| return radians * 180 / static_cast<FloatType>(M_PI); |
| } |
| }; |
| |
| } // namespace input |
| } // namespace cobalt |
| |
| #endif // COBALT_INPUT_CAMERA_3D_H_ |