Add cimgui
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392
engine/libs/rlImGui/examples/editor.cpp
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392
engine/libs/rlImGui/examples/editor.cpp
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/*******************************************************************************************
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*
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* raylib-extras [ImGui] example - editor
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*
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* This is a more complex ImGui Integration
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* It shows how to build windows on top of 2d and 3d views using a render texture
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*
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* Copyright (c) 2021 Jeffery Myers
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*
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********************************************************************************************/
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#include "raylib.h"
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#include "raymath.h"
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#include "imgui.h"
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#include "rlImGui.h"
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#include "rlImGuiColors.h"
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bool Quit = false;
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bool ImGuiDemoOpen = false;
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class DocumentWindow
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{
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public:
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bool Open = false;
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RenderTexture ViewTexture;
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virtual void Setup() = 0;
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virtual void Shutdown() = 0;
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virtual void Show() = 0;
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virtual void Update() = 0;
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bool Focused = false;
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Rectangle ContentRect = { 0 };
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};
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class ImageViewerWindow : public DocumentWindow
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{
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public:
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void Setup() override
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{
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Camera.zoom = 1;
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Camera.target.x = 0;
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Camera.target.y = 0;
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Camera.rotation = 0;
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Camera.offset.x = GetScreenWidth() / 2.0f;
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Camera.offset.y = GetScreenHeight() / 2.0f;
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ViewTexture = LoadRenderTexture(GetScreenWidth(), GetScreenHeight());
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ImageTexture = LoadTexture("resources/parrots.png");
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UpdateRenderTexture();
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}
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void Show() override
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{
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ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
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ImGui::SetNextWindowSizeConstraints(ImVec2(400, 400), ImVec2((float)GetScreenWidth(), (float)GetScreenHeight()));
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Focused = false;
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if (ImGui::Begin("Image Viewer", &Open, ImGuiWindowFlags_NoScrollbar))
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{
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// save off the screen space content rectangle
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ContentRect = { ImGui::GetWindowPos().x + ImGui::GetWindowContentRegionMin().x, ImGui::GetWindowPos().y + ImGui::GetWindowContentRegionMin().y, ImGui::GetContentRegionAvail().x, ImGui::GetContentRegionAvail().y };
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Focused = ImGui::IsWindowFocused(ImGuiFocusedFlags_RootAndChildWindows);
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ImVec2 size = ImGui::GetContentRegionAvail();
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// center the scratch pad in the view
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Rectangle viewRect = { 0 };
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viewRect.x = ViewTexture.texture.width / 2 - size.x / 2;
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viewRect.y = ViewTexture.texture.height / 2 - size.y / 2;
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viewRect.width = size.x;
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viewRect.height = -size.y;
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if (ImGui::BeginChild("Toolbar", ImVec2(ImGui::GetContentRegionAvail().x, 25)))
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{
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ImGui::SetCursorPosX(2);
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ImGui::SetCursorPosY(3);
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if (ImGui::Button("None"))
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{
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CurrentToolMode = ToolMode::None;
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}
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ImGui::SameLine();
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if (ImGui::Button("Move"))
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{
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CurrentToolMode = ToolMode::Move;
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}
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ImGui::SameLine();
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switch (CurrentToolMode)
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{
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case ToolMode::None:
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ImGui::TextUnformatted("No Tool");
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break;
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case ToolMode::Move:
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ImGui::TextUnformatted("Move Tool");
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break;
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default:
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break;
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}
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ImGui::SameLine();
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ImGui::TextUnformatted(TextFormat("camera target X%f Y%f", Camera.target.x, Camera.target.y));
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ImGui::EndChild();
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}
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rlImGuiImageRect(&ViewTexture.texture, (int)size.x, (int)size.y, viewRect);
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}
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ImGui::End();
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ImGui::PopStyleVar();
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}
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void Update() override
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{
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if (!Open)
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return;
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if (IsWindowResized())
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{
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UnloadRenderTexture(ViewTexture);
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ViewTexture = LoadRenderTexture(GetScreenWidth(), GetScreenHeight());
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Camera.offset.x = GetScreenWidth() / 2.0f;
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Camera.offset.y = GetScreenHeight() / 2.0f;
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}
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Vector2 mousePos = GetMousePosition();
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if (Focused)
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{
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if (CurrentToolMode == ToolMode::Move)
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{
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// only do this tool when the mouse is in the content area of the window
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if (IsMouseButtonDown(0) && CheckCollisionPointRec(mousePos, ContentRect))
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{
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if (!Dragging)
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{
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LastMousePos = mousePos;
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LastTarget = Camera.target;
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}
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Dragging = true;
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Vector2 mouseDelta = Vector2Subtract(LastMousePos, mousePos);
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mouseDelta.x /= Camera.zoom;
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mouseDelta.y /= Camera.zoom;
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Camera.target = Vector2Add(LastTarget, mouseDelta);
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DirtyScene = true;
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}
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else
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{
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Dragging = false;
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}
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}
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}
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else
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{
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Dragging = false;
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}
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if (DirtyScene)
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{
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DirtyScene = false;
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UpdateRenderTexture();
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}
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}
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Texture ImageTexture;
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Camera2D Camera = { 0 };
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Vector2 LastMousePos = { 0 };
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Vector2 LastTarget = { 0 };
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bool Dragging = false;
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bool DirtyScene = false;
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enum class ToolMode
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{
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None,
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Move,
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};
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ToolMode CurrentToolMode = ToolMode::None;
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void UpdateRenderTexture()
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{
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BeginTextureMode(ViewTexture);
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ClearBackground(BLUE);
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// camera with our view offset with a world origin of 0,0
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BeginMode2D(Camera);
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// center the image at 0,0
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DrawTexture(ImageTexture, ImageTexture.width / -2, ImageTexture.height / -2, WHITE);
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EndMode2D();
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EndTextureMode();
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}
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void Shutdown() override
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{
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UnloadRenderTexture(ViewTexture);
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UnloadTexture(ImageTexture);
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}
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};
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class SceneViewWindow : public DocumentWindow
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{
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public:
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Camera3D Camera = { 0 };
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void Setup() override
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{
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ViewTexture = LoadRenderTexture(GetScreenWidth(), GetScreenHeight());
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Camera.fovy = 45;
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Camera.up.y = 1;
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Camera.position.y = 3;
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Camera.position.z = -25;
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Image img = GenImageChecked(256, 256, 32, 32, DARKGRAY, WHITE);
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GridTexture = LoadTextureFromImage(img);
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UnloadImage(img);
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GenTextureMipmaps(&GridTexture);
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SetTextureFilter(GridTexture, TEXTURE_FILTER_ANISOTROPIC_16X);
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SetTextureWrap(GridTexture, TEXTURE_WRAP_CLAMP);
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}
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void Shutdown() override
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{
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UnloadRenderTexture(ViewTexture);
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UnloadTexture(GridTexture);
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}
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void Show() override
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{
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ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
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ImGui::SetNextWindowSizeConstraints(ImVec2(400, 400), ImVec2((float)GetScreenWidth(), (float)GetScreenHeight()));
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if (ImGui::Begin("3D View", &Open, ImGuiWindowFlags_NoScrollbar))
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{
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Focused = ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows);
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// draw the view
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rlImGuiImageRenderTextureFit(&ViewTexture, true);
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}
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ImGui::End();
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ImGui::PopStyleVar();
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}
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void Update() override
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{
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if (!Open)
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return;
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if (IsWindowResized())
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{
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UnloadRenderTexture(ViewTexture);
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ViewTexture = LoadRenderTexture(GetScreenWidth(), GetScreenHeight());
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}
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float period = 10;
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float magnitude = 25;
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Camera.position.x = (float)(sinf((float)GetTime() / period) * magnitude);
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BeginTextureMode(ViewTexture);
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ClearBackground(SKYBLUE);
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BeginMode3D(Camera);
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// grid of cube trees on a plane to make a "world"
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DrawPlane(Vector3{ 0, 0, 0 }, Vector2{ 50, 50 }, BEIGE); // simple world plane
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float spacing = 4;
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int count = 5;
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for (float x = -count * spacing; x <= count * spacing; x += spacing)
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{
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for (float z = -count * spacing; z <= count * spacing; z += spacing)
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{
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Vector3 pos = { x, 0.5f, z };
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Vector3 min = { x - 0.5f,0,z - 0.5f };
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Vector3 max = { x + 0.5f,1,z + 0.5f };
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DrawCube(Vector3{ x, 1.5f, z }, 1, 1, 1, GREEN);
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DrawCube(Vector3{ x, 0.5f, z }, 0.25f, 1, 0.25f, BROWN);
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}
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}
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EndMode3D();
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EndTextureMode();
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}
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Texture2D GridTexture = { 0 };
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};
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ImageViewerWindow ImageViewer;
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SceneViewWindow SceneView;
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void DoMainMenu()
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{
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if (ImGui::BeginMainMenuBar())
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{
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if (ImGui::BeginMenu("File"))
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{
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if (ImGui::MenuItem("Exit"))
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Quit = true;
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ImGui::EndMenu();
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}
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if (ImGui::BeginMenu("Window"))
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{
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ImGui::MenuItem("ImGui Demo", nullptr, &ImGuiDemoOpen);
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ImGui::MenuItem("Image Viewer", nullptr, &ImageViewer.Open);
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ImGui::MenuItem("3D View", nullptr, &SceneView.Open);
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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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int main(int argc, char* argv[])
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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int screenWidth = 1900;
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int screenHeight = 900;
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SetConfigFlags(FLAG_MSAA_4X_HINT | FLAG_VSYNC_HINT);
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InitWindow(screenWidth, screenHeight, "raylib-Extras [ImGui] example - ImGui Demo");
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SetTargetFPS(144);
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rlImGuiSetup(true);
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ImGui::GetIO().ConfigWindowsMoveFromTitleBarOnly = true;
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ImageViewer.Setup();
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ImageViewer.Open = true;
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SceneView.Setup();
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SceneView.Open = true;
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// Main game loop
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while (!WindowShouldClose() && !Quit) // Detect window close button or ESC key
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{
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ImageViewer.Update();
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SceneView.Update();
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BeginDrawing();
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ClearBackground(DARKGRAY);
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rlImGuiBegin();
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DoMainMenu();
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if (ImGuiDemoOpen)
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ImGui::ShowDemoWindow(&ImGuiDemoOpen);
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if (ImageViewer.Open)
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ImageViewer.Show();
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if (SceneView.Open)
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SceneView.Show();
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rlImGuiEnd();
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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rlImGuiShutdown();
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ImageViewer.Shutdown();
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SceneView.Shutdown();
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// De-Initialization
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//--------------------------------------------------------------------------------------
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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