LODObject.h

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#pragma once
 
#include <memory>
#include <string>
 
#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/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 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::Object;
using tdme::engine::Rotation;
using tdme::engine::Transform;
using tdme::math::Matrix4x4;
using tdme::math::Vector3;
using tdme::utilities::Console;
 
/**
 * LOD object to be used with engine class
 * @author Andreas Drewke
 */
class tdme::engine::LODObject final:
    public Transform,
    public Entity
{
public:
    enum LODLevelType { LODLEVELTYPE_NONE, LODLEVELTYPE_MODEL, LODLEVELTYPE_IGNORE };
 
private:
    friend class ObjectRenderGroup;
 
    Engine* engine { nullptr };
    bool frustumCulling { true };
 
    Model* modelLOD1 { nullptr };
    Model* modelLOD2 { nullptr };
    Model* modelLOD3 { nullptr };
    float modelLOD2MinDistance;
    float modelLOD3MinDistance;
    float lodNoneMinDistance;
    LODLevelType levelTypeLOD2;
    LODLevelType levelTypeLOD3;
 
    string id;
    unique_ptr<Object> objectLOD1;
    unique_ptr<Object> objectLOD2;
    unique_ptr<Object> objectLOD3;
    Object* objectLOD { nullptr };
    int levelLOD;
    bool enabled;
    bool pickable;
    bool contributesShadows;
    bool receivesShadows;
    Color4 effectColorMul;
    Color4 effectColorAdd;
    Color4 effectColorMulLOD2;
    Color4 effectColorAddLOD2;
    Color4 effectColorMulLOD3;
    Color4 effectColorAddLOD3;
    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
        if (objectLOD1 != nullptr) objectLOD1->setTransform(entityTransform);
        if (objectLOD2 != nullptr) objectLOD2->setTransform(entityTransform);
        if (objectLOD3 != nullptr) objectLOD3->setTransform(entityTransform);
    }
 
public:
    // forbid class copy
    FORBID_CLASS_COPY(LODObject)
 
    /**
     * Public constructor
     * @param id id
     * @param modelLOD1 model LOD 1
     * @param levelTypeLOD2 LOD level type LOD2
     * @param modelLOD2MinDistance model LOD 2 min distance
     * @param modelLOD2 model LOD 2
     * @param levelTypeLOD3 LOD level type LOD3
     * @param modelLOD3MinDistance model LOD 3 min distance
     * @param modelLOD3 model LOD 3
     * @param lodNoneMinDistance LOD None min distance
     */
    LODObject(
        const string& id,
        Model* modelLOD1,
        LODLevelType levelTypeLOD2,
        float modelLOD2MinDistance,
        Model* modelLOD2,
        LODLevelType levelTypeLOD3,
        float modelLOD3MinDistance,
        Model* modelLOD3,
        float lodNoneMinDistance = 150.0f
    );
 
    /**
     * Public destructor
     */
    ~LODObject();
 
    // overridden method
    inline EntityType getEntityType() override {
        return ENTITYTYPE_LODOBJECT;
    }
 
    /**
     * @return LOD object 1
     */
    inline Object* getLOD1Object() {
        return objectLOD1.get();
    }
 
    /**
     * @return LOD object 2
     */
    inline Object* getLOD2Object() {
        return objectLOD2.get();
    }
 
    /**
     * @return LOD object 3
     */
    inline Object* getLOD3Object() {
        return objectLOD3.get();
    }
 
    /**
     * @return LOD object
     */
    inline Object* getLODObject() {
        // set effect colors
        if (objectLOD != nullptr) {
            // set effect colors
            if (objectLOD != nullptr) {
                if (levelLOD == 3) {
                    objectLOD->setEffectColorAdd(effectColorAddLOD3);
                    objectLOD->setEffectColorMul(effectColorMulLOD3);
                } else
                if (levelLOD == 2) {
                    objectLOD->setEffectColorAdd(effectColorAddLOD2);
                    objectLOD->setEffectColorMul(effectColorMulLOD2);
                } else {
                    objectLOD->setEffectColorAdd(Color4(0.0f, 0.0f, 0.0f, 0.0f));
                    objectLOD->setEffectColorMul(Color4(1.0f, 1.0f, 1.0f, 1.0f));
                }
                auto effectColorAdd = objectLOD->getEffectColorAdd();
                auto effectColorMul = objectLOD->getEffectColorMul();
                effectColorAdd.add(this->effectColorAdd);
                effectColorMul.scale(this->effectColorMul);
                objectLOD->setEffectColorAdd(effectColorAdd);
                objectLOD->setEffectColorMul(effectColorMul);
            }
        }
 
        //
        return objectLOD;
    }
 
    /**
     * Get current lod object
     * @param camera camera
     * @return LOD object to render
     */
    inline Object* determineLODObject(Camera* camera) {
        LODObject::LODLevelType lodLevelType = LODObject::LODLEVELTYPE_NONE;
        // determine LOD object and level type
        auto objectCamFromLengthSquared = getWorldBoundingBox()->computeClosestPointInBoundingBox(camera->getLookFrom()).sub(camera->getLookFrom()).computeLengthSquared();
        if (objectCamFromLengthSquared >= Math::square(lodNoneMinDistance)) {
            objectLOD = nullptr;
            levelLOD = 4;
        } else
        if (levelTypeLOD3 != LODLEVELTYPE_NONE &&
            objectCamFromLengthSquared >= Math::square(modelLOD3MinDistance)) {
            objectLOD = objectLOD3.get();
            levelLOD = 3;
        } else
        if (levelTypeLOD2 != LODLEVELTYPE_NONE &&
            objectCamFromLengthSquared >= Math::square(modelLOD2MinDistance)) {
            objectLOD = objectLOD2.get();
            levelLOD = 2;
        } else {
            objectLOD = objectLOD1.get();
            levelLOD = 1;
        }
 
        // set effect colors
        if (objectLOD != nullptr) {
            if (levelLOD == 3) {
                objectLOD->setEffectColorAdd(effectColorAddLOD3);
                objectLOD->setEffectColorMul(effectColorMulLOD3);
            } else
            if (levelLOD == 2) {
                objectLOD->setEffectColorAdd(effectColorAddLOD2);
                objectLOD->setEffectColorMul(effectColorMulLOD2);
            } else {
                objectLOD->setEffectColorAdd(Color4(0.0f, 0.0f, 0.0f, 0.0f));
                objectLOD->setEffectColorMul(Color4(1.0f, 1.0f, 1.0f, 1.0f));
            }
            auto effectColorAdd = objectLOD->getEffectColorAdd();
            auto effectColorMul = objectLOD->getEffectColorMul();
            effectColorAdd.add(this->effectColorAdd);
            effectColorMul.scale(this->effectColorMul);
            objectLOD->setEffectColorAdd(effectColorAdd);
            objectLOD->setEffectColorMul(effectColorMul);
        }
 
        // 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;
    }
 
    /**
     * @return effect color add for LOD3 level
     */
    inline const Color4& getEffectColorAddLOD3() const {
        return effectColorAddLOD3;
    }
 
    /**
     * Set effect color add for LOD3 level
     * @param effectColorAddLOD3 effect color add for LOD3 level
     */
    inline void setEffectColorAddLOD3(const Color4& effectColorAddLOD3) {
        this->effectColorAddLOD3 = effectColorAddLOD3;
    }
 
    /**
     * @return effect color mul for LOD3 level
     */
    inline const Color4& getEffectColorMulLOD3() const {
        return effectColorMulLOD3;
    }
 
    /**
     * Set effect color mul for LOD3 level
     * @param effectColorMulLOD3 effect color mul for LOD3 level
     */
    inline void setEffectColorMulLOD3(const Color4& effectColorMulLOD3) {
        this->effectColorMulLOD3 = effectColorMulLOD3;
    }
 
    // 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;
        if (objectLOD1 != nullptr) objectLOD1->setContributesShadows(contributesShadows);
        if (objectLOD2 != nullptr) objectLOD2->setContributesShadows(contributesShadows);
        if (objectLOD3 != nullptr) objectLOD3->setContributesShadows(contributesShadows);
    }
 
    inline bool isReceivesShadows() override {
        return receivesShadows;
    }
 
    inline void setReceivesShadows(bool receivesShadows) override {
        this->receivesShadows = receivesShadows;
        if (objectLOD1 != nullptr) objectLOD1->setReceivesShadows(receivesShadows);
        if (objectLOD2 != nullptr) objectLOD2->setReceivesShadows(receivesShadows);
        if (objectLOD3 != nullptr) objectLOD3->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;
        if (objectLOD1 != nullptr) objectLOD1->setRenderPass(renderPass);
        if (objectLOD2 != nullptr) objectLOD2->setRenderPass(renderPass);
        if (objectLOD3 != nullptr) objectLOD3->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);
        if (objectLOD1 != nullptr) objectLOD1->setShader(shaderId);
        if (objectLOD2 != nullptr) objectLOD2->setShader(shaderId);
        if (objectLOD3 != nullptr) objectLOD3->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);
        if (objectLOD1 != nullptr) objectLOD1->setShaderParameter(parameterName, parameterValue);
        if (objectLOD2 != nullptr) objectLOD2->setShaderParameter(parameterName, parameterValue);
        if (objectLOD3 != nullptr) objectLOD3->setShaderParameter(parameterName, parameterValue);
    }
 
};