dolphin/Source/Core/VideoCommon/FreeLookCamera.cpp

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// Copyright 2020 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "VideoCommon/FreeLookCamera.h"
#include <algorithm>
#include <math.h>
#include <fmt/format.h>
#include "Common/MathUtil.h"
#include "Common/ChunkFile.h"
#include "Core/Config/GraphicsSettings.h"
#include "Core/ConfigManager.h"
#include "Core/Core.h"
#include "VideoCommon/VideoCommon.h"
#include "VideoCommon/VideoConfig.h"
FreeLookCamera g_freelook_camera;
namespace
{
std::string to_string(FreelookControlType type)
{
switch (type)
{
case FreelookControlType::SixAxis:
return "Six Axis";
case FreelookControlType::FPS:
return "First Person";
case FreelookControlType::Orbital:
return "Orbital";
}
return "";
}
class SixAxisController : public CameraController
{
public:
SixAxisController() = default;
Common::Matrix44 GetView() override { return m_mat; }
void MoveVertical(float amt) override
{
m_mat = Common::Matrix44::Translate(Common::Vec3{0, amt, 0}) * m_mat;
}
void MoveHorizontal(float amt) override
{
m_mat = Common::Matrix44::Translate(Common::Vec3{amt, 0, 0}) * m_mat;
}
void Zoom(float amt) override
{
m_mat = Common::Matrix44::Translate(Common::Vec3{0, 0, amt}) * m_mat;
}
void Rotate(const Common::Vec3& amt) override
{
using Common::Matrix33;
m_mat = Common::Matrix44::FromMatrix33(Matrix33::RotateX(amt.x) * Matrix33::RotateY(amt.y) *
Matrix33::RotateZ(amt.z)) *
m_mat;
}
void Reset() override { m_mat = Common::Matrix44::Identity(); }
void DoState(PointerWrap& p) { p.Do(m_mat); }
private:
Common::Matrix44 m_mat = Common::Matrix44::Identity();
};
constexpr double HalfPI = MathUtil::PI / 2;
class FPSController : public CameraController
{
public:
Common::Matrix44 GetView() override
{
return m_rotate_mat * Common::Matrix44::Translate(m_position);
}
void MoveVertical(float amt) override
{
Common::Vec3 up{m_rotate_mat.data[4], m_rotate_mat.data[5], m_rotate_mat.data[6]};
m_position += up * amt;
}
void MoveHorizontal(float amt) override
{
Common::Vec3 right{m_rotate_mat.data[0], m_rotate_mat.data[1], m_rotate_mat.data[2]};
m_position += right * amt;
}
void Zoom(float amt) override
{
Common::Vec3 forward{m_rotate_mat.data[8], m_rotate_mat.data[9], m_rotate_mat.data[10]};
m_position += forward * amt;
}
void Rotate(const Common::Vec3& amt) override
{
m_rotation += amt;
using Common::Matrix33;
using Common::Matrix44;
m_rotate_mat =
Matrix44::FromMatrix33(Matrix33::RotateX(m_rotation.x) * Matrix33::RotateY(m_rotation.y));
}
void Reset() override
{
m_position = Common::Vec3{};
m_rotation = Common::Vec3{};
m_rotate_mat = Common::Matrix44::Identity();
}
void DoState(PointerWrap& p)
{
p.Do(m_rotation);
p.Do(m_rotate_mat);
p.Do(m_position);
}
private:
Common::Vec3 m_rotation = Common::Vec3{};
Common::Matrix44 m_rotate_mat = Common::Matrix44::Identity();
Common::Vec3 m_position = Common::Vec3{};
};
class OrbitalController : public CameraController
{
public:
Common::Matrix44 GetView() override
{
Common::Matrix44 result = Common::Matrix44::Identity();
result *= Common::Matrix44::Translate(Common::Vec3{0, 0, -m_distance});
result *= Common::Matrix44::FromMatrix33(Common::Matrix33::RotateX(m_rotation.x));
result *= Common::Matrix44::FromMatrix33(Common::Matrix33::RotateY(m_rotation.y));
return result;
}
void MoveVertical(float) override {}
void MoveHorizontal(float) override {}
void Zoom(float amt) override
{
m_distance += -1 * amt;
m_distance = std::clamp(m_distance, 0.0f, m_distance);
}
void Rotate(const Common::Vec3& amt) override { m_rotation += amt; }
void Reset() override
{
m_rotation = Common::Vec3{};
m_distance = 0;
}
void DoState(PointerWrap& p)
{
p.Do(m_rotation);
p.Do(m_distance);
}
private:
float m_distance = 0;
Common::Vec3 m_rotation = Common::Vec3{};
};
} // namespace
void FreeLookCamera::SetControlType(FreelookControlType type)
{
if (m_current_type && *m_current_type == type)
{
return;
}
if (type == FreelookControlType::SixAxis)
{
m_camera_controller = std::make_unique<SixAxisController>();
}
else if (type == FreelookControlType::Orbital)
{
m_camera_controller = std::make_unique<OrbitalController>();
}
else
{
m_camera_controller = std::make_unique<FPSController>();
}
m_current_type = type;
}
Common::Matrix44 FreeLookCamera::GetView()
{
return m_camera_controller->GetView();
}
void FreeLookCamera::MoveVertical(float amt)
{
m_camera_controller->MoveVertical(amt);
m_dirty = true;
}
void FreeLookCamera::MoveHorizontal(float amt)
{
m_camera_controller->MoveHorizontal(amt);
m_dirty = true;
}
void FreeLookCamera::Zoom(float amt)
{
m_camera_controller->Zoom(amt);
m_dirty = true;
}
void FreeLookCamera::Rotate(const Common::Vec3& amt)
{
m_camera_controller->Rotate(amt);
m_dirty = true;
}
void FreeLookCamera::Reset()
{
m_camera_controller->Reset();
m_dirty = true;
}
void FreeLookCamera::DoState(PointerWrap& p)
{
if (p.mode == PointerWrap::MODE_WRITE || p.mode == PointerWrap::MODE_MEASURE)
{
p.Do(m_current_type);
if (m_camera_controller)
{
m_camera_controller->DoState(p);
}
}
else
{
const auto old_type = m_current_type;
p.Do(m_current_type);
if (old_type == m_current_type)
{
m_camera_controller->DoState(p);
}
else if (p.GetMode() == PointerWrap::MODE_READ)
{
const std::string old_type_name = old_type ? to_string(*old_type) : "";
const std::string loaded_type_name = m_current_type ? to_string(*m_current_type) : "";
const std::string message =
fmt::format("State needs same free look camera type. Settings value '{}', loaded value "
"'{}'. Aborting load state",
old_type_name, loaded_type_name);
Core::DisplayMessage(message, 5000);
p.SetMode(PointerWrap::MODE_VERIFY);
}
}
}
bool FreeLookCamera::IsDirty() const
{
return m_dirty;
}