atdunbg
7d137fa9b1
- 修正上一版"全量暴力重算"：UE 实为 dirty 标记 + 惰性计算，前提是 字段私有（SetRelativeLocation 等 setter 标脏 + 子级传播） - TransformComponent：SRT 字段私有化，Set/Get/World()/IsDirty 访问器； Set* 变更才标脏；AddRotationY 便捷接口 - Scene::UpdateTransforms 只重算脏实体——静止实体零成本； 层级（父子）传播在脏标记基础上扩展 - 迁移 Camera/SceneRenderer/main.cpp 到封装 API
73 lines
2.9 KiB
C++
73 lines
2.9 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 "GLFW/glfw3.h"
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namespace Engine {
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void Camera::Update(Window& window, ECS::TransformComponent& t, f32 deltaTime)
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{
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// 鼠标旋转：直接写实体旋转（yaw → rotation.y，pitch → rotation.x）
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if (m_MouseLookEnabled)
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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 = t.GetRotation();
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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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t.SetRotation(rot);
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}
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}
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// 基向量由实体旋转决定（本地 -Z 为视线方向；应用顺序 Y→X，
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// 与 TransformComponent::Compose 一致；roll 不参与 FPS 相机）
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const glm::vec3& rot = t.GetRotation();
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const glm::mat3 r = static_cast<glm::mat3>(
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glm::rotate(glm::mat4(1.0f), glm::radians(rot.y),
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glm::vec3(0, 1, 0)) *
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glm::rotate(glm::mat4(1.0f), glm::radians(rot.x),
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glm::vec3(1, 0, 0)));
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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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f32 speed = m_MoveSpeed * deltaTime;
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if (window.IsKeyPressed(GLFW_KEY_W)) { t.SetPosition(t.GetPosition() + forward * speed); }
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if (window.IsKeyPressed(GLFW_KEY_S)) { t.SetPosition(t.GetPosition() - forward * speed); }
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if (window.IsKeyPressed(GLFW_KEY_A)) { t.SetPosition(t.GetPosition() - right * speed); }
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if (window.IsKeyPressed(GLFW_KEY_D)) { t.SetPosition(t.GetPosition() + right * speed); }
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if (window.IsKeyPressed(GLFW_KEY_SPACE)) { t.SetPosition(t.GetPosition() + glm::vec3(0, speed, 0)); }
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if (window.IsKeyPressed(GLFW_KEY_LEFT_SHIFT)) { t.SetPosition(t.GetPosition() - glm::vec3(0, speed, 0)); }
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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(f32 aspect, f32 nearZ, 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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