Видеоуроки
Interface
Essentials
Advanced
Подсказки и советы
Основы
Программирование на C#
Рендеринг
Принципы работы
Свойства (properties)
Компонентная Система
Рендер
Физика
Редактор UnigineEditor
Обзор интерфейса
Работа с ассетами
Настройки и предпочтения
Работа с проектами
Настройка параметров узла
Setting Up Materials
Настройка свойств
Освещение
Landscape Tool
Sandworm
Использование инструментов редактора для конкретных задач
Extending Editor Functionality
Встроенные объекты
Узлы (Nodes)
Объекты (Objects)
Эффекты
Декали
Источники света
Geodetics
World Objects
Звуковые объекты
Объекты поиска пути
Players
Программирование
Основы
Настройка среды разработки
UnigineScript
C++
C#
Унифицированный язык шейдеров UUSL
File Formats
Rebuilding the Engine Tools
GUI
Двойная точность координат
API
Containers
Common Functionality
Controls-Related Classes
Engine-Related Classes
Filesystem Functionality
GUI-Related Classes
Math Functionality
Node-Related Classes
Objects-Related Classes
Networking Functionality
Pathfinding-Related Classes
Physics-Related Classes
Plugins-Related Classes
IG Plugin
CIGIConnector Plugin
Rendering-Related Classes
Работа с контентом
Оптимизация контента
Материалы
Art Samples
Tutorials

Playing Sounds on Collisions

The example below demonstrates how to:

  • Create a new sound source.
  • Update settings of the existing sound source.
  • Implement a contact callback that plays a sound at a contact with a physical body.
Notice
The sound file used in the example can be found in the <UnigineSDK>/data/samples/sounds/sounds folder. You can also specify any other file, including .mp3.

AppWorldLogic.h:

Source code (C++)
#ifndef __APP_WORLD_LOGIC_H__
#define __APP_WORLD_LOGIC_H__

#include <UnigineLogic.h>
#include <UnigineStreams.h>
#include <UniginePhysics.h>
#include <UnigineMesh.h>
#include <UnigineSounds.h>
#include <UnigineObjects.h>
#include <UnigineEditor.h>

class AppWorldLogic : public Unigine::WorldLogic {

public:
	AppWorldLogic();
	virtual ~AppWorldLogic();

	virtual int init();

	virtual int update();
	virtual int postUpdate();
	virtual int updatePhysics();

	virtual int shutdown();

	virtual int save(const Unigine::StreamPtr &stream);
	virtual int restore(const Unigine::StreamPtr &stream);

private:

	// callbacks
	struct ContactArguments
	{
		Unigine::BodyPtr body;
		int num;

		ContactArguments(const Unigine::BodyPtr &body, int num)
		{
			this->body = body;
			this->num = num;
		}
	};

	Unigine::Vector<ContactArguments> callbacks;
	Unigine::Vector<Unigine::SoundSourcePtr> sounds;
	void contact_callback(Unigine::BodyPtr body, int num);
	void contact_callback_handler(const Unigine::BodyPtr &body, int num);
	void create_box(Unigine::Math::Vec3 position);
};

#endif // __APP_WORLD_LOGIC_H__

AppWorldLogic.cpp:

Source code (C++)
#include "AppWorldLogic.h"
// World logic, it takes effect only when the world is loaded.
// These methods are called right after corresponding world script's (UnigineScript) methods.

using namespace Unigine;
using namespace Math;

AppWorldLogic::AppWorldLogic() {

}

AppWorldLogic::~AppWorldLogic() {

}

// a callback function that will be run when a contact with a given body emerges
void AppWorldLogic::contact_callback(BodyPtr body, int num)
{
	ContactArguments ca = ContactArguments(body, num);
	callbacks.append(ca);
}

void AppWorldLogic::contact_callback_handler(const BodyPtr &body, int num)
{

	if (num >= body->getNumContacts())
		return;

	// get coordinates of the contact point
	Vec3 position = body->getContactPoint(num);
	// get the relative impulse in the contact point
	float impulse = body->getContactImpulse(num);
	// calculate volume of the sound played for the contact
	float volume = impulse * 0.5f - 1.0f;

	// a flag indicating that no sounds have played yet
	bool need_sound = true;

	for (int i = 0; i < sounds.size(); i++)
	{
		if (!sounds[i]->isPlaying())
		{
			need_sound = false;

			// reuse the existing sound source
			sounds[i]->setEnabled(1);
			sounds[i]->setGain(saturate(volume));
			sounds[i]->setWorldTransform(translate(position));
			Sound::renderWorld(1);
			sounds[i]->play();
			break;
		}
	}
	if (need_sound)
	{
		// create a new sound source
		SoundSourcePtr s = SoundSource::create("static_impact_00.wav");
		// specify necessary settings for the sound source
		s->setOcclusion(0);
		s->setMinDistance(10.0f);
		s->setMaxDistance(100.0f);
		s->setGain(saturate(volume));
		s->setWorldTransform(translate(position));
		// play the sound source
		s->play();

		// append the sound to the vector of the playing sounds
		sounds.append(s);
	}
}

// method creating a box mesh with a physical body
void AppWorldLogic::create_box(Vec3 position)
{

	MeshPtr mesh = Mesh::create();
	mesh->addBoxSurface("box_0", vec3(0.5f));
	ObjectMeshStaticPtr object_mesh = ObjectMeshStatic::create(mesh);
	object_mesh->setMaterial("mesh_base", "*");
	object_mesh->setWorldTransform(translate(position));
	object_mesh->setCollision(1, 0);

	BodyRigidPtr body = BodyRigid::create(object_mesh);
	ShapeBox::create(body, vec3(0.5f));
	// set a callback function that is run when a contact with the box occurs
	body->addContactEnterCallback(MakeCallback(this, &AppWorldLogic::contact_callback));

}

int AppWorldLogic::init() {

	// create box meshes
	for (int i = -5; i <= 5; i++) {
		AppWorldLogic::create_box(Vec3(0.0f, i * 2.0f, 8.0f + i * 1.0f));
	}
	// create another box mesh
	AppWorldLogic::create_box(Vec3(5.0f, 10.0f, 50.0f));

	sounds.clear();
	callbacks.clear();

	return 1;
}

int AppWorldLogic::update() {

	if (callbacks.size() > 0)
	{
		for (int i = 0; i > callbacks.size(); i++)
		{
			contact_callback_handler(callbacks[i].body, callbacks[i].num);
			//delete callbacks[i];
		}
		callbacks.clear();
	}

	return 1;
}

int AppWorldLogic::postUpdate() {

	return 1;
}

int AppWorldLogic::updatePhysics() {

	return 1;
}

int AppWorldLogic::shutdown() {

	for (int i = 0; i < sounds.size(); i++)
		sounds[i].clear();
	sounds.clear();

	return 1;
}

int AppWorldLogic::save(const Unigine::StreamPtr &stream) {

	UNIGINE_UNUSED(stream);
	return 1;
}

int AppWorldLogic::restore(const Unigine::StreamPtr &stream) {

	UNIGINE_UNUSED(stream);
	return 1;
}
Last update: 05.02.2021
Build: ()