atdunbg
641b255cb2
New Engine/Core/Input.h/.cpp: static input facade with a Key/MouseButton enum (values map to GLFW key codes internally) so scripts and game logic no longer touch GLFW directly - window backend becomes swappable and the facade is the surface to expose when embedding scripting later. Wired up in Application's constructor; Camera (editor camera WASD/RMB/MMB), the WASDMove script and SandboxApp key handling now query Input only. Ctrl+P hotkey fix: the !m_Playing guard made the hotkey dead exactly when it was needed - after pressing Play. Now toggles both ways. Toolbar Pause button now reads "Resume" while paused (tooltip follows).
179 lines
7.9 KiB
C++
179 lines
7.9 KiB
C++
//
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// Created by atdunbg on 2026/9/22.
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//
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#include <Engine/Renderer/Camera.h>
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#include <Engine/Core/Window.h>
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#include <Engine/ECS/Components.h>
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#include <glm/gtc/matrix_transform.hpp>
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#include <cmath>
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#include "Engine/Core/Input.h" // 键查询走统一输入门面（不依赖 GLFW）
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namespace Engine {
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namespace {
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// 欧拉（度）→ 旋转矩阵：应用序 Y→X，与 TransformComponent::
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// Compose 一致（roll 不参与 FPS/编辑器相机）
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glm::mat3 EulerRotMat(const glm::vec3& rotDeg)
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{
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return static_cast<glm::mat3>(
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glm::rotate(glm::mat4(1.0f), glm::radians(rotDeg.y),
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glm::vec3(0, 1, 0)) *
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glm::rotate(glm::mat4(1.0f), glm::radians(rotDeg.x),
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glm::vec3(1, 0, 0)));
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}
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}
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void Camera::Update(Window& window, ECS::TransformComponent& transform,
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const f32 deltaTime, const bool flyRequiresRMB)
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{
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// ---- 输入模式（UE Scene view 语义）：RMB=自由视角（鼠标转向
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// + 飞行），MMB=焦点环绕（Shift+MMB=平移），滚轮=推拉。三种
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// 光标型交互互斥共用捕获；编辑器模式 flyRequiresRMB=true 时
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// 移动键仅 RMB 按住生效（否则与 Gizmo W/E/R 热键冲突）----
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const bool wantLook = m_MouseLookEnabled &&
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Input::IsMouseButtonDown(Input::MouseButton::Right);
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const bool wantOrbit = m_MouseLookEnabled &&
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Input::IsMouseButtonDown(Input::MouseButton::Middle);
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if (wantLook || wantOrbit)
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{
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if (!window.IsCursorCaptured())
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{
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window.SetCursorCaptured(true);
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}
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f32 mouseDX = 0, mouseDY = 0;
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window.GetMouseDelta(mouseDX, mouseDY);
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if (mouseDX != 0 || mouseDY != 0)
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{
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glm::vec3 rot = transform.GetRotation();
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// GetRotation 是 0-360 显示域（UE Details 约定）；pitch 的
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// clamp 需要连续域，wrap 回 [-180,180)（yaw 同步处理，
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// 跨 ±180 继续累减不打折返）
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for (int i = 0; i < 2; ++i) {
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rot[i] = std::fmod(rot[i], 360.0f);
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if (rot[i] >= 180.0f) rot[i] -= 360.0f;
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if (rot[i] < -180.0f) rot[i] += 360.0f;
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}
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// 右手系绕 Y 正角度 = 向左转，鼠标右移（DX>0）应看向右
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// → yaw 取负。pitch 正角度 = 抬头，鼠标下移（DY>0）低头
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// → rot.x 直接用负号，两者符号已核对一致
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rot.y -= mouseDX * m_MouseSensitivity;
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rot.x = glm::clamp(
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rot.x - mouseDY * m_MouseSensitivity, -89.0f, 89.0f);
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transform.SetRotation(rot);
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if (wantOrbit)
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{
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if (Input::IsKeyDown(Input::Key::LeftShift))
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{
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// ---- 屏幕平面平移：内容跟手（拖右 → 相机左移、
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// 拖下 → 相机上移），pivot 同步平移保持环绕点的
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// 屏幕相对位置 ----
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const glm::mat3 r = EulerRotMat(rot);
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const glm::vec3 delta =
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(-r * glm::vec3(1, 0, 0)) * mouseDX +
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(r * glm::vec3(0, 1, 0)) * mouseDY;
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const f32 k = m_OrbitDistance * 0.002f; // m/px
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transform.SetPosition(transform.GetPosition() + delta * k);
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if (m_HasPivot) m_OrbitPivot += delta * k;
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}
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else
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{
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// ---- 焦点环绕：转向后保持到 pivot 的距离。首次
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// 环绕无 pivot：取当前视线上 m_OrbitDistance 处
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if (!m_HasPivot)
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{
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m_OrbitPivot = transform.GetPosition() +
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EulerRotMat(transform.GetRotation()) *
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glm::vec3(0, 0, -1) *
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m_OrbitDistance;
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m_HasPivot = true;
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}
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m_OrbitDistance = glm::length(
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transform.GetPosition() - m_OrbitPivot);
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const glm::vec3 orbitFwd =
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EulerRotMat(rot) * glm::vec3(0, 0, -1);
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transform.SetPosition(m_OrbitPivot -
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orbitFwd * m_OrbitDistance);
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}
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}
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}
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}
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else if (window.IsCursorCaptured())
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{
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window.SetCursorCaptured(false);
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}
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// 基向量由（可能已更新的）实体旋转决定（本地 -Z 为视线方向）
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const glm::mat3 r = EulerRotMat(transform.GetRotation());
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const glm::vec3 forward = r * glm::vec3(0, 0, -1);
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const glm::vec3 right = r * glm::vec3(1, 0, 0);
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// ---- 飞行移动：编辑器模式仅 RMB（wantLook）时生效；游戏模式
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// 常开（原行为）----
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if (wantLook || !flyRequiresRMB)
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{
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const f32 speed = m_MoveSpeed * deltaTime;
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if (Input::IsKeyDown(Input::Key::W)) { transform.SetPosition(transform.GetPosition() + forward * speed); }
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if (Input::IsKeyDown(Input::Key::S)) { transform.SetPosition(transform.GetPosition() - forward * speed); }
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if (Input::IsKeyDown(Input::Key::A)) { transform.SetPosition(transform.GetPosition() - right * speed); }
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if (Input::IsKeyDown(Input::Key::D)) { transform.SetPosition(transform.GetPosition() + right * speed); }
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if (Input::IsKeyDown(Input::Key::Space)) { transform.SetPosition(transform.GetPosition() + glm::vec3(0, speed, 0)); }
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if (Input::IsKeyDown(Input::Key::LeftShift)) { transform.SetPosition(transform.GetPosition() - glm::vec3(0, speed, 0)); }
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}
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// ---- 滚轮推拉：有 pivot 时改环绕距离（指数步进，近处精细/
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// 远处大步）；无 pivot 时沿视线平移 ----
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const f32 wheel = window.ConsumeScrollDelta();
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if (m_MouseLookEnabled && wheel != 0.0f)
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{
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if (m_HasPivot)
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{
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m_OrbitDistance = glm::clamp(
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m_OrbitDistance * std::pow(0.9f, wheel), 0.5f, 500.0f);
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transform.SetPosition(m_OrbitPivot - forward * m_OrbitDistance);
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}
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else
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{
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transform.SetPosition(transform.GetPosition() +
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forward * wheel * m_MoveSpeed * deltaTime);
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}
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}
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}
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void Camera::FocusOn(ECS::TransformComponent& transform, const glm::vec3& point)
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{
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const glm::vec3 fwd =
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EulerRotMat(transform.GetRotation()) * glm::vec3(0, 0, -1);
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m_OrbitPivot = point;
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m_HasPivot = true;
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transform.SetPosition(point - fwd * m_OrbitDistance);
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}
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glm::mat4 Camera::GetView(const ECS::TransformComponent& t) const
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{
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// 相机作为实体：视图 = 世界矩阵的逆（无重复位姿状态）
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return glm::inverse(t.World());
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}
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glm::mat4 Camera::GetProjection(const f32 aspect, const f32 nearZ, const f32 farZ) const
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{
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auto proj = glm::perspective(glm::radians(45.0f), aspect, nearZ, farZ);
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proj[1][1] *= -1.0f; // Vulkan Y 翻转
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// Vulkan clip 深度 [0,1]：z' = 0.5*z_clip + 0.5*w_clip。
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// perspective 的 w_clip = -z_eye，偏移折算进 z 系数
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//（注意：与 ortho 的公式不同，ortho 的 w=1 才能直接加到 [3][2]）
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proj[2][2] = proj[2][2] * 0.5f - 0.5f;
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proj[3][2] *= 0.5f;
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return proj;
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}
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} // namespace Engine
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