RenderEngine.h

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#pragma once
 
#include <memory>
#include <string>
#include <vector>
#include <glm/glm.hpp>
 
#include "RenderParams.h"
 
namespace dyno
{
    class SceneGraph;
    class Node;
    class Camera;
    struct RenderParams;
 
    enum EEnvStyle
    {
        Standard = 0,
        Studio = 1
    };
 
    // data structure for mouse selection
    struct Selection {
 
        struct Item {
            std::shared_ptr<Node> node = 0;
            int   instance = -1;
            int   primitive = -1;
        };
 
        int x = -1;
        int y = -1;
        int w = -1;
        int h = -1;
        std::vector<Item> items;
    };
 
    // RenderEngine interface
    class RenderEngine
    {
    public:
        virtual void initialize() = 0;
        virtual void terminate() = 0;
 
        virtual void draw(SceneGraph* scene, const RenderParams& rparams) = 0;
 
 
        virtual Selection select(int x, int y, int w, int h) = 0;
 
        virtual std::string name() const = 0;
 
        virtual void setDefaultEnvmap() {};
 
        void setUseEnvmapBackground(bool flag) { bDrawEnvmap = flag; }
        void setEnvmapScale(float scale) { enmapScale = scale; }
 
        virtual void setEnvStyle(EEnvStyle style) { envStyle = style; }
 
    public:
 
        // Backcolor gray scale
        glm::vec3 bgColor0 = glm::vec3(0.2f);
        glm::vec3 bgColor1 = glm::vec3(0.8f);
 
        // some render options...
        bool  showGround = true;
        float planeScale = 3.f;
        float rulerScale = 1.f;
        glm::vec4 planeColor = { 0.3, 0.3, 0.3, 0.5 };
        glm::vec4 rulerColor = { 0.0, 0.0, 0.0, 0.5 };
 
        bool  bDrawEnvmap = false;
        float enmapScale = 0.0f;
 
        bool  showSceneBounds = false;
 
        int envStyle = 0;
    };
};