mirror of
https://github.com/libretro/dolphin
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306 lines
6.7 KiB
C++
306 lines
6.7 KiB
C++
// Copyright 2020 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "VideoCommon/FreeLookCamera.h"
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#include <algorithm>
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#include <math.h>
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#include <fmt/format.h>
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#include "Common/MathUtil.h"
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#include "Common/ChunkFile.h"
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#include "Core/Config/GraphicsSettings.h"
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#include "Core/ConfigManager.h"
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#include "Core/Core.h"
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#include "VideoCommon/VideoCommon.h"
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#include "VideoCommon/VideoConfig.h"
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FreeLookCamera g_freelook_camera;
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namespace
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{
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std::string to_string(FreelookControlType type)
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{
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switch (type)
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{
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case FreelookControlType::SixAxis:
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return "Six Axis";
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case FreelookControlType::FPS:
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return "First Person";
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case FreelookControlType::Orbital:
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return "Orbital";
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}
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return "";
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}
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class SixAxisController : public CameraController
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{
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public:
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SixAxisController() = default;
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Common::Matrix44 GetView() override { return m_mat; }
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void MoveVertical(float amt) override
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{
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m_mat = Common::Matrix44::Translate(Common::Vec3{0, amt, 0}) * m_mat;
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}
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void MoveHorizontal(float amt) override
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{
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m_mat = Common::Matrix44::Translate(Common::Vec3{amt, 0, 0}) * m_mat;
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}
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void Zoom(float amt) override
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{
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m_mat = Common::Matrix44::Translate(Common::Vec3{0, 0, amt}) * m_mat;
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}
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void Rotate(const Common::Vec3& amt) override
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{
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using Common::Matrix33;
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m_mat = Common::Matrix44::FromMatrix33(Matrix33::RotateX(amt.x) * Matrix33::RotateY(amt.y) *
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Matrix33::RotateZ(amt.z)) *
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m_mat;
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}
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void Reset() override { m_mat = Common::Matrix44::Identity(); }
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void DoState(PointerWrap& p) { p.Do(m_mat); }
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private:
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Common::Matrix44 m_mat = Common::Matrix44::Identity();
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};
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constexpr double HalfPI = MathUtil::PI / 2;
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class FPSController : public CameraController
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{
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public:
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Common::Matrix44 GetView() override
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{
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return m_rotate_mat * Common::Matrix44::Translate(m_position);
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}
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void MoveVertical(float amt) override
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{
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Common::Vec3 up{m_rotate_mat.data[4], m_rotate_mat.data[5], m_rotate_mat.data[6]};
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m_position += up * amt;
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}
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void MoveHorizontal(float amt) override
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{
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Common::Vec3 right{m_rotate_mat.data[0], m_rotate_mat.data[1], m_rotate_mat.data[2]};
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m_position += right * amt;
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}
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void Zoom(float amt) override
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{
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Common::Vec3 forward{m_rotate_mat.data[8], m_rotate_mat.data[9], m_rotate_mat.data[10]};
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m_position += forward * amt;
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}
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void Rotate(const Common::Vec3& amt) override
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{
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m_rotation += amt;
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using Common::Matrix33;
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using Common::Matrix44;
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m_rotate_mat =
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Matrix44::FromMatrix33(Matrix33::RotateX(m_rotation.x) * Matrix33::RotateY(m_rotation.y));
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}
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void Reset() override
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{
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m_position = Common::Vec3{};
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m_rotation = Common::Vec3{};
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m_rotate_mat = Common::Matrix44::Identity();
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}
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void DoState(PointerWrap& p)
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{
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p.Do(m_rotation);
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p.Do(m_rotate_mat);
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p.Do(m_position);
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}
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private:
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Common::Vec3 m_rotation = Common::Vec3{};
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Common::Matrix44 m_rotate_mat = Common::Matrix44::Identity();
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Common::Vec3 m_position = Common::Vec3{};
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};
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class OrbitalController : public CameraController
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{
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public:
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Common::Matrix44 GetView() override
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{
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Common::Matrix44 result = Common::Matrix44::Identity();
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result *= Common::Matrix44::Translate(Common::Vec3{0, 0, -m_distance});
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result *= Common::Matrix44::FromMatrix33(Common::Matrix33::RotateX(m_rotation.x));
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result *= Common::Matrix44::FromMatrix33(Common::Matrix33::RotateY(m_rotation.y));
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return result;
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}
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void MoveVertical(float) override {}
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void MoveHorizontal(float) override {}
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void Zoom(float amt) override
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{
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m_distance += -1 * amt;
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m_distance = std::clamp(m_distance, 0.0f, m_distance);
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}
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void Rotate(const Common::Vec3& amt) override { m_rotation += amt; }
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void Reset() override
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{
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m_rotation = Common::Vec3{};
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m_distance = 0;
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}
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void DoState(PointerWrap& p)
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{
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p.Do(m_rotation);
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p.Do(m_distance);
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}
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private:
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float m_distance = 0;
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Common::Vec3 m_rotation = Common::Vec3{};
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};
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} // namespace
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void FreeLookCamera::SetControlType(FreelookControlType type)
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{
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if (m_current_type && *m_current_type == type)
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{
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return;
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}
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if (type == FreelookControlType::SixAxis)
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{
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m_camera_controller = std::make_unique<SixAxisController>();
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}
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else if (type == FreelookControlType::Orbital)
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{
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m_camera_controller = std::make_unique<OrbitalController>();
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}
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else
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{
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m_camera_controller = std::make_unique<FPSController>();
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}
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m_current_type = type;
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}
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Common::Matrix44 FreeLookCamera::GetView()
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{
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return m_camera_controller->GetView();
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}
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Common::Vec2 FreeLookCamera::GetFieldOfView() const
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{
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return Common::Vec2{m_fov_x, m_fov_y};
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}
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void FreeLookCamera::MoveVertical(float amt)
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{
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m_camera_controller->MoveVertical(amt);
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m_dirty = true;
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}
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void FreeLookCamera::MoveHorizontal(float amt)
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{
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m_camera_controller->MoveHorizontal(amt);
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m_dirty = true;
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}
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void FreeLookCamera::Zoom(float amt)
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{
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m_camera_controller->Zoom(amt);
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m_dirty = true;
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}
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void FreeLookCamera::Rotate(const Common::Vec3& amt)
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{
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m_camera_controller->Rotate(amt);
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m_dirty = true;
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}
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void FreeLookCamera::IncreaseFovX(float fov)
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{
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m_fov_x += fov;
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m_fov_x = std::clamp(m_fov_x, m_fov_step_size, m_fov_x);
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}
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void FreeLookCamera::IncreaseFovY(float fov)
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{
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m_fov_y += fov;
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m_fov_y = std::clamp(m_fov_y, m_fov_step_size, m_fov_y);
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}
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float FreeLookCamera::GetFovStepSize() const
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{
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return m_fov_step_size;
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}
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void FreeLookCamera::Reset()
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{
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m_camera_controller->Reset();
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m_fov_x = 1.0f;
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m_fov_y = 1.0f;
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m_dirty = true;
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}
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void FreeLookCamera::DoState(PointerWrap& p)
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{
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if (p.mode == PointerWrap::MODE_WRITE || p.mode == PointerWrap::MODE_MEASURE)
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{
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p.Do(m_current_type);
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p.Do(m_fov_x);
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p.Do(m_fov_y);
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if (m_camera_controller)
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{
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m_camera_controller->DoState(p);
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}
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}
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else
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{
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const auto old_type = m_current_type;
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p.Do(m_current_type);
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p.Do(m_fov_x);
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p.Do(m_fov_y);
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if (old_type == m_current_type)
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{
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m_camera_controller->DoState(p);
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}
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else if (p.GetMode() == PointerWrap::MODE_READ)
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{
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const std::string old_type_name = old_type ? to_string(*old_type) : "";
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const std::string loaded_type_name = m_current_type ? to_string(*m_current_type) : "";
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const std::string message =
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fmt::format("State needs same free look camera type. Settings value '{}', loaded value "
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"'{}'. Aborting load state",
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old_type_name, loaded_type_name);
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Core::DisplayMessage(message, 5000);
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p.SetMode(PointerWrap::MODE_VERIFY);
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}
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}
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}
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bool FreeLookCamera::IsDirty() const
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{
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return m_dirty;
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}
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void FreeLookCamera::SetClean()
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{
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m_dirty = false;
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}
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