From 5b361d81dbd2af0d0e99b9eb1adebea76ff05db0 Mon Sep 17 00:00:00 2001 From: hachem Date: Thu, 20 Aug 2026 02:27:02 +0200 Subject: [chore]: MASSIVE refactor + more vulkan bs --- src/core/camera.cpp | 225 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 225 insertions(+) create mode 100644 src/core/camera.cpp (limited to 'src/core/camera.cpp') diff --git a/src/core/camera.cpp b/src/core/camera.cpp new file mode 100644 index 0000000..35b7a2f --- /dev/null +++ b/src/core/camera.cpp @@ -0,0 +1,225 @@ +#include "camera.h" + +#include +#include + +namespace Donut +{ + Camera::Camera(float fov, float aspect_ratio, float near_plane, float far_plane) + : m_fov(fov), m_aspect_ratio(aspect_ratio), m_near_plane(near_plane), m_far_plane(far_plane) + { + recalculate_projection_matrix(); + recalculate_view_matrix(); + } + + auto Camera::set_projection(float fov, float aspect_ratio, float near_plane, float far_plane) -> void + { + m_fov = fov; + m_aspect_ratio = aspect_ratio; + m_near_plane = near_plane; + m_far_plane = far_plane; + recalculate_projection_matrix(); + } + + auto Camera::recalculate_projection_matrix() -> void + { + m_projection_matrix = glm::perspective(glm::radians(m_fov), m_aspect_ratio, m_near_plane, m_far_plane); + m_view_projection_matrix = m_projection_matrix * m_view_matrix; + } + + auto Camera::recalculate_view_matrix() -> void + { + if (m_camera_mode == CameraMode::FPS) + { + float pitch = glm::radians(m_rotation.x); + float yaw = glm::radians(m_rotation.y); + float roll = glm::radians(m_rotation.z); + + glm::vec3 direction; + direction.x = cos(yaw) * cos(pitch); + direction.y = sin(pitch); + direction.z = sin(yaw) * cos(pitch); + + glm::vec3 world_up(0.0f, 1.0f, 0.0f); + glm::vec3 front = glm::normalize(direction); + glm::vec3 right = glm::normalize(glm::cross(front, world_up)); + glm::vec3 up = glm::normalize(glm::cross(right, front)); + + m_view_matrix = glm::lookAt(m_position, m_position + front, up); + m_view_projection_matrix = m_projection_matrix * m_view_matrix; + } + else if (m_camera_mode == CameraMode::Orbital) + { + glm::vec3 position = get_orbital_position(); + glm::vec3 target = m_orbital_target; + glm::vec3 up(0.0f, 1.0f, 0.0f); + + m_view_matrix = glm::lookAt(position, target, up); + m_view_projection_matrix = m_projection_matrix * m_view_matrix; + } + } + + auto Camera::get_forward_direction() const -> glm::vec3 + { + float pitch = glm::radians(m_rotation.x); + float yaw = glm::radians(m_rotation.y); + + glm::vec3 direction; + direction.x = cos(yaw) * cos(pitch); + direction.y = sin(pitch); + direction.z = sin(yaw) * cos(pitch); + + return glm::normalize(direction); + } + + auto Camera::get_right_direction() const -> glm::vec3 + { + glm::vec3 world_up(0.0f, 1.0f, 0.0f); + return glm::normalize(glm::cross(get_forward_direction(), world_up)); + } + + auto Camera::get_up_direction() const -> glm::vec3 + { + return glm::normalize(glm::cross(get_right_direction(), get_forward_direction())); + } + + auto Camera::on_mouse_move(float x_offset, float y_offset, bool constrain_pitch) -> void + { + if (m_camera_mode == CameraMode::FPS) + { + x_offset *= m_mouse_sensitivity; + y_offset *= m_mouse_sensitivity; + + m_rotation.y += x_offset; + m_rotation.x += y_offset; + + if (constrain_pitch) + { + if (m_rotation.x > 89.0f) + m_rotation.x = 89.0f; + if (m_rotation.x < -89.0f) + m_rotation.x = -89.0f; + } + + recalculate_view_matrix(); + } + } + + auto Camera::move_forward(float delta_time) -> void + { + if (m_camera_mode == CameraMode::FPS) + { + m_position += get_forward_direction() * m_movement_speed * delta_time; + recalculate_view_matrix(); + } + } + + auto Camera::move_backward(float delta_time) -> void + { + if (m_camera_mode == CameraMode::FPS) + { + m_position -= get_forward_direction() * m_movement_speed * delta_time; + recalculate_view_matrix(); + } + } + + auto Camera::move_right(float delta_time) -> void + { + if (m_camera_mode == CameraMode::FPS) + { + m_position += get_right_direction() * m_movement_speed * delta_time; + recalculate_view_matrix(); + } + } + + auto Camera::move_left(float delta_time) -> void + { + if (m_camera_mode == CameraMode::FPS) + { + m_position -= get_right_direction() * m_movement_speed * delta_time; + recalculate_view_matrix(); + } + } + + auto Camera::move_up(float delta_time) -> void + { + if (m_camera_mode == CameraMode::FPS) + { + glm::vec3 world_up(0.0f, 1.0f, 0.0f); + m_position += world_up * m_movement_speed * delta_time; + recalculate_view_matrix(); + } + } + + auto Camera::move_down(float delta_time) -> void + { + if (m_camera_mode == CameraMode::FPS) + { + glm::vec3 world_up(0.0f, 1.0f, 0.0f); + m_position -= world_up * m_movement_speed * delta_time; + recalculate_view_matrix(); + } + } + + auto Camera::get_orbital_position() const -> glm::vec3 + { + float clamped_elevation = glm::clamp(m_elevation, 0.01f, float(std::numbers::pi) - 0.01f); + return glm::vec3 + ( + m_orbital_radius * sin(clamped_elevation) * cos(m_azimuth), + m_orbital_radius * cos(clamped_elevation), + m_orbital_radius * sin(clamped_elevation) * sin(m_azimuth) + ); + } + + auto Camera::update_orbital() -> void + { + m_orbital_target = glm::vec3(0.0f, 0.0f, 0.0f); + if (m_dragging || m_panning) + m_moving = true; + else + m_moving = false; + recalculate_view_matrix(); + } + + auto Camera::process_orbital_mouse_move(double x, double y) -> void + { + if (m_dragging && !m_panning) + { + float dx = float(x - m_last_x_orbital); + float dy = float(y - m_last_y_orbital); + + m_azimuth += dx * m_orbital_speed; + m_elevation -= dy * m_orbital_speed; + m_elevation = glm::clamp(m_elevation, 0.01f, float(std::numbers::pi) - 0.01f); + } + + m_last_x_orbital = x; + m_last_y_orbital = y; + update_orbital(); + } + + auto Camera::process_orbital_mouse_button(int button, int action, int mods) -> void + { + if (button == GLFW_MOUSE_BUTTON_LEFT) + { + if (action == GLFW_PRESS) + { + m_dragging = true; + m_panning = false; + } + else if (action == GLFW_RELEASE) + { + m_dragging = false; + m_panning = false; + } + } + } + + auto Camera::process_orbital_scroll(double x_offset, double y_offset) -> void + { + m_orbital_radius -= y_offset * m_zoom_speed; + m_orbital_radius = glm::clamp(m_orbital_radius, m_orbital_min_radius, m_orbital_max_radius); + update_orbital(); + } +} -- cgit v1.3