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#pragma once
#include <ansel/Defines.h>
#include <nv/Vec3.h>
#include <nv/Quat.h>

namespace ansel
{
    struct Camera
    {
        // Position of camera, in the game's coordinate space
        nv::Vec3 position;
        // Rotation of the camera, in the game's coordinate space. I.e. if you apply this
        // rotation to the default orientation of the game's camera you will get the current
        // orientation of the camera (again, in game's coordinate space)
        nv::Quat rotation;
        // Field of view in degrees. This value is either vertical or horizontal field of
        // view based on the 'fovType' setting passed in with setConfiguration.
        float fov;
        // The amount that the projection matrix needs to be offset by. These values are
        // applied directly as translations to the projection matrix. These values are only
        // non-zero during Highres capture.
        float projectionOffsetX, projectionOffsetY;
        // Values of the near and far planes
        float nearPlane, farPlane;
        // Projection matrix aspect ratio
        float aspectRatio;
    };

    // Must be called on every frame an Ansel session is active. The 'camera' must contain
    // the current display camera settings when called. After calling 'camera' will contain the
    // new requested camera from Ansel.
    ANSEL_SDK_API void updateCamera(Camera& camera);

    // Converts quaternion to rotation matrix vectors.
    ANSEL_SDK_API void quaternionToRotationMatrixVectors(const nv::Quat& q, nv::Vec3& right, nv::Vec3& up, nv::Vec3& forward);

    // Converts rotation matrix vectors to quaternion. 
    ANSEL_SDK_API void rotationMatrixVectorsToQuaternion(const nv::Vec3& right, const nv::Vec3& up, const nv::Vec3& forward, nv::Quat& q);
}