446 lines
16 KiB
C++
Executable File
446 lines
16 KiB
C++
Executable File
#ifndef EDITOR_HPP
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#define EDITOR_HPP
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#include <open_engine.hpp>
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#include "open_engine/events/mouse_event.hpp"
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#include "open_engine/input/input_system.hpp"
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#include "open_engine/input/mouse_codes.hpp"
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#include "open_engine/renderer/render_command.hpp"
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#include "open_engine/renderer/renderer2d.hpp"
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#include "open_engine/scene/components.hpp"
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#include "panels/scene_hierarchy.hpp"
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#include <glm/ext/matrix_transform.hpp>
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#include <glm/gtc/type_ptr.hpp>
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#include <glm/matrix.hpp>
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#include <entt/entt.hpp>
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#include <glad/glad.h>
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#include <GLFW/glfw3.h>
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#include <ImGuizmo.h>
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#include <cstdint>
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#include <imgui.h>
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#include <vector>
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#include <string>
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namespace OpenEngine {
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class CameraController : public NativeScriptableEntity
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{
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public:
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void OnCreate()
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{
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};
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void OnUpdate()
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{
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auto delta = Time::DeltaTime();
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if (HasComponent<TransformComponent>()) {
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auto& position = GetComponent<TransformComponent>().translation;
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if (Input::IsKeyPressed(KeyCode::Up))
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position.y += 5.0 * delta;
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if (Input::IsKeyPressed(KeyCode::Down))
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position.y -= 5.0 * delta;
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if (Input::IsKeyPressed(KeyCode::Right))
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position.x += 5.0 * delta;
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if (Input::IsKeyPressed(KeyCode::Left))
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position.x -= 5.0 * delta;
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}
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};
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void OnDestroy()
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{
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};
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};
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class EditorLayer : public Layer
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{
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public:
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EditorLayer()
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: Layer("editor_layer")
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{
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}
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~EditorLayer() {};
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void OnAttach() override
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{
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OE_PROFILE_FUNCTION();
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FramebufferSpecification specs;
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specs.attachments = { FramebufferTextureFormat::RGBA8, FramebufferTextureFormat::RED_INTEGER, FramebufferTextureFormat::Depth };
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specs.width = 1280;
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specs.height = 720;
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framebuffer = FrameBuffer::Create(specs);
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scene = CreateRef<Scene>();
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editor_camera = EditorCamera(30.0f, 1920.0f/1080.0f, 0.1f, 1000.0f);
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/*
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for (float i = 0; i < 200; i++) {
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for (float y = 0; y < 200; y++) {
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Entity entity = scene->CreateEntity("entity");
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entities.push_back(entity);
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auto& tc = entity.AddComponents<TransformComponent>();
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tc.translation = { i / 10, y / 10, 0.0f };
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tc.scale = { 0.1f, 0.1f, 1.0f };
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auto& sprite = entity.AddComponents<SpriteRendererComponent>();
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sprite.color = { i / 100.0f, y / 100.0f, 1.0f, 1.0f };
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}
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}
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*/
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scene_hierarchy.SetContext(scene);
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}
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void OnDetach() override
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{
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}
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void OnUpdate() override
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{
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FramebufferSpecification spec = framebuffer->GetSpecification();
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if (viewport_size.x > 0.0f && viewport_size.y > 0.0f &&
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(spec.width != viewport_size.x || spec.height != viewport_size.y)) {
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OE_PROFILE_SCOPE("Setting up Rendering");
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framebuffer->Resize((uint32_t)viewport_size.x, (uint32_t)viewport_size.y);
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editor_camera.SetViewportSize(viewport_size.x, viewport_size.y);
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scene->OnViewportResize((uint32_t)viewport_size.x, (uint32_t)viewport_size.y);
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}
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framebuffer->Bind();
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Renderer2D::ResetStats();
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RenderCommand::SetClearColor({0.11f, 0.11f, 0.15f, 1.0f});
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RenderCommand::Clear();
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framebuffer->ClearBufferI(1, -1);
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editor_camera.OnUpdate();
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scene->OnUpdateEditor(editor_camera);
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auto [mx, my] = ImGui::GetMousePos();
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mx -= viewport_bounds[0].x;
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my -= viewport_bounds[0].y;
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auto viewport_size= viewport_bounds[1] - viewport_bounds[0];
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my = viewport_size.y - my;
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int mouse_x = (int)mx;
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int mouse_y = (int)my;
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static bool clicked = false;
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// Mouse Picking
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if (Input::IsMouseButtonPressed(MouseCode::ButtonLeft)
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&& mouse_x >= 0 && mouse_y >= 0
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&& mouse_x < (int)viewport_size.x && (int)viewport_size.y &&
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!ImGuizmo::IsOver() && !Input::IsKeyPressed(KeyCode::LeftAlt)) {
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if (!clicked) {
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int id = framebuffer->ReadPixel(1, mouse_x, mouse_y);
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selected_entity = id == -1 ?
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Entity() : Entity((entt::entity)id, scene.get());
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scene_hierarchy.SetSelectedEntity(selected_entity);
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}
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clicked = true;
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} else {
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clicked = false;
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}
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framebuffer->Unbind();
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}
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bool EditorKeyBinds(KeyPressedEvent& event)
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{
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if (event.GetRepeatCount() > 0)
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return false;
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bool control = Input::IsKeyPressed(Key::LeftControl) || Input::IsKeyPressed(Key::RightControl);
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bool shift = Input::IsKeyPressed(Key::LeftShift) || Input::IsKeyPressed(Key::RightShift);
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switch(event.GetKeyCode()) {
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case KeyCode::Q: {
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guizmo_operation = -1;
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break;
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}
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case KeyCode::W: {
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guizmo_operation = ImGuizmo::OPERATION::TRANSLATE;
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break;
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}
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case KeyCode::E: {
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guizmo_operation = ImGuizmo::OPERATION::ROTATE;
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break;
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}
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case KeyCode::R: {
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guizmo_operation = ImGuizmo::OPERATION::SCALE;
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break;
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}
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default:
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break;
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}
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return true;
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};
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void OnEvent(Event& event) override
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{
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OE_PROFILE_FUNCTION();
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editor_camera.OnEvent(event);
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EventDispatcher dispatcher(event);
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dispatcher.Dispatch<KeyPressedEvent>(BIND_EVENT_FN(EditorLayer::EditorKeyBinds));
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};
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float remap(float value, float minInput, float maxInput, float minOutput, float maxOutput) {
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// 1. Normalize the input to a 0.0 - 1.0 range
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float t = (value - minInput) / (maxInput - minInput);
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// 2. Use glm::mix to interpolate between the output range
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return glm::mix(minOutput, maxOutput, t);
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};
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glm::vec3 ScreenToWorld(
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float screenX,
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float screenY,
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float screenZ, // depth value (0.0 = near plane, 1.0 = far plane)
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const glm::mat4& view,
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const glm::mat4& projection,
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int viewportWidth,
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int viewportHeight)
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{
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// 1. Convert screen coordinates to normalized device coordinates (NDC)
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// Screen space: origin at top-left, Y points down
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// NDC space: origin at center, range [-1, 1] for x and y
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float x = (2.0f * screenX) / viewportWidth - 1.0f;
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float y = 1.0f - (2.0f * screenY) / viewportHeight; // Flip Y
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float z = 2.0f * screenZ - 1.0f; // [0,1] -> [-1,1]
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glm::vec4 clipCoords(x, y, z, 1.0f);
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// 2. Transform from clip space to view space
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glm::mat4 invProjection = glm::inverse(projection);
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glm::vec4 viewCoords = invProjection * clipCoords;
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// 3. Transform from view space to world space
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glm::mat4 invView = glm::inverse(view);
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glm::vec4 worldCoords = invView * viewCoords;
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// 4. Perspective divide
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if (worldCoords.w != 0.0f) {
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worldCoords /= worldCoords.w;
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}
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return glm::vec3(worldCoords);
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};
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void DrawViewport()
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{
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ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2{ 0, 0 });
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ImGui::Begin("Viewport");
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bool focused = ImGui::IsWindowFocused();
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bool hovered = ImGui::IsWindowHovered();
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Application::Get().GetImGuiLayer()->SetBlockEvents((!focused && !hovered) || ImGui::IsAnyItemActive());
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ImVec2 viewport_panel_size = ImGui::GetContentRegionAvail();
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viewport_size = { viewport_panel_size.x, viewport_panel_size.y };
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ImVec2 imgui_cursor_position = ImGui::GetCursorScreenPos();
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uint32_t texture_id = framebuffer->GetColorAttachmentRendererID();
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ImGui::Image((void*)(uint64_t)texture_id, ImVec2{ viewport_size.x, viewport_size.y }, ImVec2{ 0, 1 }, ImVec2{ 1, 0 });
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viewport_bounds[0] = { imgui_cursor_position.x, imgui_cursor_position.y };
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viewport_bounds[1] = { imgui_cursor_position.x + viewport_size.x,
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imgui_cursor_position.y + viewport_size.y };
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DrawGuizmos();
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ImGui::End();
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ImGui::PopStyleVar();
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};
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void DrawStats()
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{
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auto stats = Renderer2D::GetStats();
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static float time = 0;
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time += Time::DeltaTime();
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if (time >= 1) {
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time = 0;
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}
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ImGui::Begin("Statistics");
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ImGui::SeparatorText("Performance");
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ImGui::Text("FPS: %0.0f", 1 / Time::DeltaTime());
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ImGui::Text("Renderer2D:");
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ImGui::Text("\t\tDraw calls: %d", stats.draw_calls);
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ImGui::Text("\t\tQuad count: %d", stats.quad_count);
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ImGui::Text("\t\tVertices count: %d", stats.GetTotalVertexCount());
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ImGui::Text("\t\tIndices count: %d", stats.GetTotalIndexCount());
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if (selected_entity) {
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ImGui::SeparatorText("Entities");
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ImGui::Text("Selected entity:");
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ImGui::Text("\t\tname: %s", selected_entity.GetComponents<TagComponent>().tag.c_str());
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ImGui::Text("\t\tid: %d", (uint32_t)selected_entity);
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}
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ImGui::End();
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};
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void DrawGuizmos()
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{
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Entity selected_entity = scene_hierarchy.GetSelectedEntity();
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if (selected_entity && selected_entity.HasComponent<TransformComponent>() && guizmo_operation != -1) {
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ImGuizmo::SetOrthographic(false);
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ImGuizmo::SetDrawlist();
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ImGuizmo::Enable(!editor_camera.GetMoving());
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ImGuizmo::SetRect(viewport_bounds[0].x, viewport_bounds[0].y,
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viewport_bounds[1].x - viewport_bounds[0].x,
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viewport_bounds[1].y - viewport_bounds[0].y);
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const glm::mat4& camera_projection = editor_camera.GetProjection();
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glm::mat4 camera_view = editor_camera.GetViewMatrix();
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auto& transform_comp = selected_entity.GetComponents<TransformComponent>();
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glm::mat4 transform = transform_comp.GetTransform();
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bool snap = Input::IsKeyPressed(KeyCode::LeftControl);
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float snap_value = 0.1f;
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if (guizmo_operation == ImGuizmo::OPERATION::ROTATE)
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snap_value = 10.0f;
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float snap_values[] = { snap_value, snap_value, snap_value };
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ImGuizmo::Manipulate(glm::value_ptr(camera_view), glm::value_ptr(camera_projection),
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(ImGuizmo::OPERATION)guizmo_operation, ImGuizmo::LOCAL,
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glm::value_ptr(transform), nullptr,
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snap ? snap_values : nullptr);
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if (ImGuizmo::IsUsing()) {
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glm::vec3 translation, rotation, scale;
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Math::DecomposeTransform(transform, translation, rotation, scale);
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glm::vec3 delta_rotation = rotation - transform_comp.rotation;
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transform_comp.translation = translation;
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transform_comp.rotation += delta_rotation;
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transform_comp.scale = scale;
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}
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}
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};
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void OnImGuiRender() override
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{
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OE_PROFILE_FUNCTION();
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ImGui::PushStyleVar(ImGuiStyleVar_WindowMinSize, ImVec2(450, 200));
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{
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if (ImGui::BeginMainMenuBar()) {
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if (ImGui::BeginMenu("File")) {
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if (ImGui::MenuItem("Save Scene As", "Ctrl+S")) {
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std::string file = FileDialogs::SaveFile("useless");
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OE_TRACE("saving to filename: {}", file);
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if (!file.empty()) {
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SceneSerializer serializer(scene);
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serializer.Serialize(file);
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}
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}
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if (ImGui::MenuItem("Open Scene", "Ctrl+O")) {
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std::string file = FileDialogs::OpenFile("useless");
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OE_DEBUG("loading filename: {}", file);
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if (!file.empty()) {
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scene = CreateRef<Scene>();
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scene->OnViewportResize((uint32_t)viewport_size.x, (uint32_t)viewport_size.y);
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scene_hierarchy.SetContext(scene);
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SceneSerializer serializer(scene);
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serializer.Deserialize(file);
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}
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}
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if (ImGui::MenuItem("New Scene", "Ctrl+N")) {
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scene = CreateRef<Scene>();
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scene->OnViewportResize((uint32_t)viewport_size.x, (uint32_t)viewport_size.y);
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scene_hierarchy.SetContext(scene);
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}
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ImGui::Separator();
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if (ImGui::MenuItem("Exit"))
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Application::Get().Close();
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ImGui::EndMenu();
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}
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ImGui::EndMainMenuBar();
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}
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}
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ImGui::DockSpaceOverViewport();
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DrawStats();
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scene_hierarchy.OnImGuiRender();
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DrawViewport();
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ImGui::ShowDemoWindow();
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ImGui::PopStyleVar();
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};
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private:
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std::vector<Time::ProfilingResult> profiling_results;
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glm::vec2 world_pos_cursor = { 0.0f, 0.0f };
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glm::vec2 viewport_size = { 0.0f, 0.0f };
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Ref<OpenEngine::FrameBuffer> framebuffer;
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glm::vec2 viewport_bounds[2];
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SceneHierarchy scene_hierarchy;
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EditorCamera editor_camera;
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int guizmo_operation = -1;
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Ref<Scene> scene;
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Entity selected_entity;
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};
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}
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class EditorApp : public OpenEngine::Application
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{
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public:
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EditorApp();
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~EditorApp();
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};
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#endif // EDITOR_HPP
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/*
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#include <cstdio>
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#include <string>
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std::string OpenFile() {
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char buffer[1024];
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// This command opens a native GTK file picker and returns the path
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FILE* pipe = popen("zenity --file-selection", "r");
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if (!pipe) return "";
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if (fgets(buffer, sizeof(buffer), pipe) != NULL) {
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std::string path = buffer;
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path.erase(path.find_last_not_of("\n") + 1); // Clean newline
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pclose(pipe);
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return path;
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}
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pclose(pipe);
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return "";
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}
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*/
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