LODObjectImposter.h

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#pragma once
 
#include <memory>
#include <string>
#include <vector>
 
#include <tdme/tdme.h>
#include <tdme/engine/fwd-tdme.h>
#include <tdme/engine/model/fwd-tdme.h>
#include <tdme/engine/Color4.h>
#include <tdme/engine/primitives/fwd-tdme.h>
#include <tdme/engine/subsystems/renderer/fwd-tdme.h>
#include <tdme/engine/subsystems/rendering/ObjectInternal.h>
#include <tdme/engine/Camera.h>
#include <tdme/engine/Entity.h>
#include <tdme/engine/EntityShaderParameters.h>
#include <tdme/engine/ImposterObject.h>
#include <tdme/engine/Object.h>
#include <tdme/engine/Rotation.h>
#include <tdme/engine/Transform.h>
#include <tdme/math/Matrix4x4.h>
#include <tdme/math/Vector3.h>
#include <tdme/utilities/Console.h>
 
using std::string;
using std::to_string;
using std::unique_ptr;
using std::vector;
 
using tdme::engine::Color4;
using tdme::engine::model::Model;
using tdme::engine::primitives::BoundingBox;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::subsystems::rendering::ObjectInternal;
using tdme::engine::Engine;
using tdme::engine::Entity;
using tdme::engine::EntityShaderParameters;
using tdme::engine::ImposterObject;
using tdme::engine::Object;
using tdme::engine::Rotation;
using tdme::engine::Transform;
using tdme::math::Matrix4x4;
using tdme::math::Vector3;
using tdme::utilities::Console;
 
/**
 * LOD object + imposter to be used with engine class
 * @author Andreas Drewke
 */
class tdme::engine::LODObjectImposter final:
    public Transform,
    public Entity
{
private:
    Engine* engine { nullptr };
    bool frustumCulling { true };
 
    Model* modelLOD1 { nullptr };
    float lod2MinDistance;
    float lodNoneMinDistance;
 
    string id;
    unique_ptr<Object> objectLOD1;
    unique_ptr<ImposterObject> objectLOD2;
 
    Object* objectLOD { nullptr };
 
    int levelLOD;
    bool enabled;
    bool pickable;
    bool contributesShadows;
    bool receivesShadows;
    Color4 effectColorMul;
    Color4 effectColorAdd;
    Color4 effectColorMulLOD2;
    Color4 effectColorAddLOD2;
    RenderPass renderPass { RENDERPASS_STANDARD };
    string shaderId { "default" };
 
    EntityShaderParameters shaderParameters;
 
    Transform parentTransform;
    Matrix4x4 entityTransformMatrix;
 
    // overridden methods
    inline void setParentTransform(const Transform& parentTransform) override {
        //
        this->parentTransform = parentTransform;
        auto entityTransform = parentTransform * (*this);
        entityTransformMatrix = entityTransform.getTransformMatrix();
        // delegate to LOD objects
        objectLOD1->setTransform(entityTransform);
        objectLOD2->setTransform(entityTransform);
    }
 
public:
    // forbid class copy
    FORBID_CLASS_COPY(LODObjectImposter)
 
    /**
     * Public constructor
     * @param id id
     * @param modelLOD1 model LOD 1
     * @param imposterModelsLOD2 imposter models LOD 2
     * @param lod2MinDistance LOD2 min distance
     * @param lodNoneMinDistance LOD None min distance
     */
    LODObjectImposter(
        const string& id,
        Model* modelLOD1,
        const vector<Model*>& imposterModelsLOD2,
        float lod2MinDistance,
        float lodNoneMinDistance = 150.0f
    );
 
    /**
     * Public destructor
     */
    ~LODObjectImposter();
 
    // overridden method
    inline EntityType getEntityType() override {
        return ENTITYTYPE_LODOBJECTIMPOSTER;
    }
 
    /**
     * @return LOD object 1
     */
    inline Object* getLOD1Object() {
        return objectLOD1.get();
    }
 
    /**
     * @return LOD object 2
     */
    inline ImposterObject* getLOD2Object() {
        return objectLOD2.get();
    }
 
    /**
     * @return LOD object
     */
    inline Object* getLODObject() {
        return objectLOD;
    }
 
    /**
     * Get current lod object
     * @param camera camera
     * @return LOD object to render
     */
    inline Object* determineLODObject(Camera* camera) {
        // determine LOD object and level type
        auto objectCamFromLengthSquared = getWorldBoundingBox()->computeClosestPointInBoundingBox(camera->getLookFrom()).sub(camera->getLookFrom()).computeLengthSquared();
        if (objectCamFromLengthSquared >= Math::square(lodNoneMinDistance)) {
            objectLOD = nullptr;
            levelLOD = 3;
        } else
        if (objectCamFromLengthSquared >= Math::square(lod2MinDistance)) {
            levelLOD = 2;
            objectLOD = objectLOD2->determineBillboardObject(camera);
        } else {
            objectLOD = objectLOD1.get();
            levelLOD = 1;
        }
 
        // done
        return objectLOD;
    }
 
    /**
     * @return effect color add for LOD2 level
     */
    inline const Color4& getEffectColorAddLOD2() const {
        return effectColorAddLOD2;
    }
 
    /**
     * Set effect color add for LOD2 level
     * @param effectColorAddLOD2 effect color add for LOD2 level
     */
    inline void setEffectColorAddLOD2(const Color4& effectColorAddLOD2) {
        this->effectColorAddLOD2 = effectColorAddLOD2;
    }
 
    /**
     * @return effect color mul for LOD2 level
     */
    inline const Color4& getEffectColorMulLOD2() const {
        return effectColorMulLOD2;
    }
 
    /**
     * Set effect color mul for LOD2 level
     * @param effectColorMulLOD2 effect color mul for LOD2 level
     */
    inline void setEffectColorMulLOD2(const Color4& effectColorMulLOD2) {
        this->effectColorMulLOD2 = effectColorMulLOD2;
    }
 
    // overridden methods
    void setEngine(Engine* engine) override;
    void setRenderer(Renderer* renderer) override;
    void initialize() override;
    void dispose() override;
 
    inline bool isEnabled() override {
        return enabled;
    }
 
    void setEnabled(bool enabled) override;
    bool isFrustumCulling() override;
    void setFrustumCulling(bool frustumCulling) override;
    void update() override;
 
    inline BoundingBox* getBoundingBox() override {
        return objectLOD1->getBoundingBox();
    }
 
    inline BoundingBox* getWorldBoundingBox() override {
        return objectLOD1->getWorldBoundingBox();
    }
 
    inline const Color4& getEffectColorMul() const override {
        return effectColorMul;
    }
 
    inline void setEffectColorMul(const Color4& effectColorMul) override {
        this->effectColorMul = effectColorMul;
    }
 
    inline const Color4& getEffectColorAdd() const override {
        return effectColorAdd;
    }
 
    inline void setEffectColorAdd(const Color4& effectColorAdd) override {
        this->effectColorAdd = effectColorAdd;
    }
 
    inline const string& getId() override {
        return id;
    }
 
    inline bool isPickable() override {
        return pickable;
    }
 
    inline bool isContributesShadows() override {
        return contributesShadows;
    }
 
    inline void setContributesShadows(bool contributesShadows) override {
        this->contributesShadows = contributesShadows;
        objectLOD1->setContributesShadows(contributesShadows);
        objectLOD2->setContributesShadows(contributesShadows);
    }
 
    inline bool isReceivesShadows() override {
        return receivesShadows;
    }
 
    inline void setReceivesShadows(bool receivesShadows) override {
        this->receivesShadows = receivesShadows;
        objectLOD1->setReceivesShadows(receivesShadows);
        objectLOD2->setReceivesShadows(receivesShadows);
    }
 
    inline void setPickable(bool pickable) override {
        this->pickable = pickable;
    }
 
    inline const Matrix4x4 getNodeTransformMatrix(const string& id) {
        return objectLOD1->getNodeTransformMatrix(id);
    }
 
    inline const Vector3& getTranslation() const override {
        return Transform::getTranslation();
    }
 
    inline void setTranslation(const Vector3& translation) override {
        Transform::setTranslation(translation);
    }
 
    inline const Vector3& getScale() const override {
        return Transform::getScale();
    }
 
    inline void setScale(const Vector3& scale) override {
        Transform::setScale(scale);
    }
 
    inline const int getRotationCount() const override {
        return Transform::getRotationCount();
    }
 
    inline Rotation& getRotation(const int idx) override {
        return Transform::getRotation(idx);
    }
 
    inline void addRotation(const Vector3& axis, const float angle) override {
        Transform::addRotation(axis, angle);
    }
 
    inline void removeRotation(const int idx) override {
        Transform::removeRotation(idx);
    }
 
    inline const Vector3& getRotationAxis(const int idx) const override {
        return Transform::getRotationAxis(idx);
    }
 
    inline void setRotationAxis(const int idx, const Vector3& axis) override {
        Transform::setRotationAxis(idx, axis);
    }
 
    inline const float getRotationAngle(const int idx) const override {
        return Transform::getRotationAngle(idx);
    }
 
    inline void setRotationAngle(const int idx, const float angle) override {
        Transform::setRotationAngle(idx, angle);
    }
 
    inline const Quaternion& getRotationsQuaternion() const override {
        return Transform::getRotationsQuaternion();
    }
 
    inline const Matrix4x4& getTransformMatrix() const override {
        return entityTransformMatrix;
    }
 
    inline const Transform& getParentTransform() const override {
        return parentTransform;
    }
 
    inline const Transform& getTransform() const override {
        return *this;
    }
 
    void setTransform(const Transform& transform) override;
 
    inline RenderPass getRenderPass() const override {
        return renderPass;
    }
 
    inline void setRenderPass(RenderPass renderPass) override {
        this->renderPass = renderPass;
        objectLOD1->setRenderPass(renderPass);
        objectLOD2->setRenderPass(renderPass);
    }
 
    /**
     * @return shader id
     */
    inline const string& getShader() {
        return shaderId;
    }
 
    /**
     * Set shader id
     * @param id shader
     */
    inline void setShader(const string& id) {
        this->shaderId = id;
        shaderParameters.setShader(shaderId);
        objectLOD1->setShader(shaderId);
        objectLOD2->setShader(shaderId);
    }
 
    /**
     * Returns shader parameter for given parameter name, if the value does not exist, the default will be returned
     * @param shaderId shader id
     * @param parameterName parameter name
     * @return shader parameter
     */
    inline const ShaderParameter getShaderParameter(const string& parameterName) {
        return shaderParameters.getShaderParameter(parameterName);
    }
 
    /**
     * Set shader parameter for given parameter name
     * @param shaderId shader id
     * @param parameterName parameter name
     * @param paraemterValue parameter value
     */
    inline void setShaderParameter(const string& parameterName, const ShaderParameter& parameterValue) {
        shaderParameters.setShaderParameter(parameterName, parameterValue);
        objectLOD1->setShaderParameter(parameterName, parameterValue);
        objectLOD2->setShaderParameter(parameterName, parameterValue);
    }
 
};