ParticleSystemGroup.h

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#pragma once
 
#include <string>
#include <vector>
 
#include <tdme/tdme.h>
#include <tdme/engine/fwd-tdme.h>
#include <tdme/engine/primitives/BoundingBox.h>
#include <tdme/engine/subsystems/renderer/fwd-tdme.h>
#include <tdme/engine/Entity.h>
#include <tdme/engine/ObjectParticleSystem.h>
#include <tdme/engine/ParticleSystem.h>
#include <tdme/engine/Transform.h>
#include <tdme/math/fwd-tdme.h>
#include <tdme/math/Math.h>
#include <tdme/math/Matrix4x4.h>
#include <tdme/math/Vector3.h>
 
using std::string;
using std::to_string;
using std::vector;
 
using tdme::engine::primitives::BoundingBox;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::Engine;
using tdme::engine::Entity;
using tdme::engine::ObjectParticleSystem;
using tdme::engine::ParticleSystem;
using tdme::engine::Transform;
using tdme::math::Math;
using tdme::math::Matrix4x4;
using tdme::math::Vector3;
 
/**
 * Particle system group, which combines several particle systems into a group, to be used with engine class
 * @author Andreas Drewke
 */
class tdme::engine::ParticleSystemGroup final
    : public Transform
    , public ParticleSystem
{
private:
    Engine* engine { nullptr };
    bool frustumCulling { true };
    RenderPass renderPass { RENDERPASS_STANDARD };
 
    string id;
    bool contributesShadows;
    bool receivesShadows;
    bool enabled;
    bool pickable;
    bool autoEmit;
    BoundingBox boundingBox;
    BoundingBox worldBoundingBox;
    Color4 effectColorMul;
    Color4 effectColorAdd;
    vector<ParticleSystem*> particleSystems;
    Transform localTransform;
 
    Transform parentTransform;
    Matrix4x4 entityTransformMatrix;
 
    // overridden methods
    inline void setParentTransform(const Transform& parentTransform) override {
        //
        this->parentTransform = parentTransform;
        auto entityTransform = parentTransform * (*this);
        entityTransformMatrix = entityTransform.getTransformMatrix();
        //
        for (auto particleSystem: particleSystems) particleSystem->setParentTransform(entityTransform);
    }
 
public:
    // forbid class copy
    FORBID_CLASS_COPY(ParticleSystemGroup)
 
    /**
     * Public constructor
     * @param id id
     * @param autoEmit auto emit
     * @param contributesShadows contributes shadows
     * @param receivesShadows receives shadows
     * @param particleSystems particle systems
     */
    ParticleSystemGroup(const string& id, bool autoEmit, bool contributesShadows, bool receivesShadows, const vector<ParticleSystem*>& particleSystems);
 
    /**
     * Destructor
     */
    ~ParticleSystemGroup();
 
    // overridden method
    inline EntityType getEntityType() override {
        return ENTITYTYPE_PARTICLESYSTEMGROUP;
    }
 
    /**
     * @return particle systems
     */
    inline const vector<ParticleSystem*>& getParticleSystems() {
        return particleSystems;
    }
 
    // 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;
 
    inline bool isFrustumCulling() override {
        return frustumCulling;
    }
 
    void setFrustumCulling(bool frustumCulling) override;
    void update() override;
 
    inline BoundingBox* getBoundingBox() override {
        if (particleSystems.empty() == false) {
            // compute new bounding box
            boundingBox.fromBoundingVolume(dynamic_cast<Entity*>(particleSystems[0])->getBoundingBox());
            for (auto i = 1; i < particleSystems.size(); i++) {
                boundingBox.extend(dynamic_cast<Entity*>(particleSystems[i])->getBoundingBox());
            }
            boundingBox.update();
        }
 
        //
        return &boundingBox;
    }
 
    inline BoundingBox* getWorldBoundingBox() override {
        // update world bounding box
        worldBoundingBox.fromBoundingVolumeWithTransformMatrix(getBoundingBox(), entityTransformMatrix);
 
        //
        return &worldBoundingBox;
    }
 
    inline ParticleEmitter* getEmitter() override {
        return nullptr;
    }
 
    inline const Color4& getEffectColorAdd() const override {
        return effectColorAdd;
    }
 
    inline void setEffectColorAdd(const Color4& effectColorAdd) override {
        for (auto particleSystem: particleSystems) particleSystem->setEffectColorAdd(effectColorAdd);
        this->effectColorAdd = effectColorAdd;
    }
 
    inline const Color4& getEffectColorMul() const override {
        return effectColorMul;
    }
 
    inline void setEffectColorMul(const Color4& effectColorMul) override {
        for (auto particleSystem: particleSystems) particleSystem->setEffectColorMul(effectColorMul);
        this->effectColorMul = effectColorMul;
    }
 
    inline const string& getId() override {
        return id;
    }
 
    inline bool isContributesShadows() override {
        return contributesShadows;
    }
 
    inline void setContributesShadows(bool contributesShadows) override {
        this->contributesShadows = contributesShadows;
        for (auto particleSystem: particleSystems) {
            auto ops = dynamic_cast<ObjectParticleSystem*>(particleSystem);
            if (ops != nullptr) ops->setContributesShadows(contributesShadows);
        }
    }
 
    inline bool isReceivesShadows() override {
        return receivesShadows;
    }
 
    inline void setReceivesShadows(bool receivesShadows) override {
        this->receivesShadows = receivesShadows;
        for (auto particleSystem: particleSystems) {
            auto ops = dynamic_cast<ObjectParticleSystem*>(particleSystem);
            if (ops != nullptr) ops->setReceivesShadows(receivesShadows);
        }
    }
 
    inline bool isPickable() override {
        return pickable;
    }
 
    inline void setPickable(bool pickable) override {
        this->pickable = true;
    }
 
    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;
    }
 
    inline bool isActive() override {
        for (auto particleSystem: particleSystems) {
            if (particleSystem->isActive() == true) return true;
        }
        return false;
    }
 
    inline bool isAutoEmit() override {
        return autoEmit;
    }
 
    inline int emitParticles() override {
        auto emittedParticles = 0;
        for (auto particleSystem: particleSystems) emittedParticles+= particleSystem->emitParticles();
        return emittedParticles;
    }
 
    void setAutoEmit(bool autoEmit) override;
    void updateParticles() override;
 
    inline const Transform& getLocalTransform() override {
        return localTransform;
    }
 
    inline void setLocalTransform(const Transform& transform) override {
        localTransform = transform;
        for (auto particleSystem: particleSystems) particleSystem->setLocalTransform(localTransform);
    }
 
};