canvaslogic.h

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#pragma once
 
#include "base/vec2.h"
#include "base/range.h"
 
namespace eu::core
{
    struct CanvasLogic
    {
        // canvas view
        vec2f scroll = vec2f {0, 0};
        float scale = 1;
 
        // "config"
        Range<float> scale_range = make_range(0.1f, 15.0f);
 
        void
        pan(const vec2f& p);
 
        void
        zoom(const vec2f& mouse, float zoom);
 
        [[nodiscard]] vec2f
        from_screen_to_world(const vec2f& p) const;
 
        [[nodiscard]] vec2f
        from_world_to_screen(const vec2f& p) const;
    };
}