depthsorter.h

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
#pragma once
 
#include "entity.h"
#include "component.h"
#include "transformcomponent.h"
 
namespace nap
{
    // Forward declares
    class RenderableComponentInstance;
 
    class NAPAPI DepthComparer
    {
    public:
        enum class EMode
        {
            FrontToBack = 0,            
            BackToFront                 
        };
 
        DepthComparer(EMode mode, const glm::mat4x4& viewMatrix);
 
        bool operator()(const nap::ComponentInstance* objectA, const nap::ComponentInstance* objectB);
 
    private:
        const glm::mat4x4& mViewMatrix;
        EMode mMode = EMode::FrontToBack;
    };
 
 
    class NAPAPI ZComparer
    {
    public:
        enum class EMode
        {
            FrontToBack = 0,            
            BackToFront                 
        };
 
        ZComparer(EMode mode);
 
        bool operator()(const nap::ComponentInstance* objectA, const nap::ComponentInstance* objectB);
 
    private:
        EMode mMode = EMode::FrontToBack;
    };
 
 
    namespace sorter
    {
        void NAPAPI sortObjectsByDepth(std::vector<RenderableComponentInstance*>& comps, const glm::mat4& viewMatrix);
 
        void NAPAPI sortObjectsByZ(std::vector<RenderableComponentInstance*>& comps);
    }
}