62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
#pragma once
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#include <sophia/entity.hpp>
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#include <sophia/frame_info.hpp>
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#include <sophia/handles.hpp>
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#include <sophia/math.hpp>
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#include <sophia/scene.hpp>
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#include <sophia/ui/panel.hpp>
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#include <sophia/ui/ui.hpp>
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/**
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* Shows the scene through its active camera. Click a sprite to select it,
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* drag it to move it (in Move mode).
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*
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* Picking and moving are 2D: they assume an orthographic camera rotated only
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* around Z, and work in the z = 0 plane.
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*/
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class ViewportPanel : public sophia::Panel {
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public:
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ViewportPanel(sophia::UI& ui, sophia::RenderTargetHandle target,
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sophia::Scene& scene, sophia::Entity& selected)
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: Panel{{.name = "Viewport",
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.windowFlags = ImGuiWindowFlags_NoScrollbar |
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ImGuiWindowFlags_NoScrollWithMouse}},
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ui{ui},
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target{target},
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scene{scene},
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selected{selected} {}
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void onUpdate(const sophia::FrameInfo& frameInfo) override;
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private:
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// Where the scene image is on screen this frame, and the camera looking
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// through it.
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struct ViewportTransform {
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ImVec2 origin;
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ImVec2 size;
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glm::mat4 viewProjection;
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glm::mat4 inverseViewProjection;
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ImVec2 worldToScreen(const glm::vec3& world) const;
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glm::vec2 screenToWorld(const ImVec2& screen) const;
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};
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void drawToolbar();
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void drawGrid(ImVec2 origin, ImVec2 size);
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void handleInput(const ViewportTransform& viewport);
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void drawSelection(const ViewportTransform& viewport);
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// The top-most sprite under `world`, or a null Entity.
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sophia::Entity pick(glm::vec2 world);
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sophia::UI& ui;
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sophia::RenderTargetHandle target;
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sophia::Scene& scene;
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sophia::Entity& selected;
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bool showGrid = true;
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// Set while a drag that started on the selected entity is moving it.
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bool dragging = false;
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};
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