// Creates the base system and returns its ID
SPK::SPK_ID createParticleSystemBase(GLuint textureIndex)
{
// Creates the model
SPK::Model* model = SPK::Model::create(SPK::FLAG_RED | SPK::FLAG_GREEN | SPK::FLAG_BLUE | SPK::FLAG_ALPHA,
SPK::FLAG_ALPHA,
SPK::FLAG_RED | SPK::FLAG_GREEN | SPK::FLAG_BLUE);
model->setParam(SPK::PARAM_ALPHA,1.0f,0.0f); // This makes the particles fade out over time
model->setLifeTime(1.0f,2.0f);
// Create the renderer
SPK::GL::GLRenderer* renderer = NULL;
// If the point sprite extension and the point parameter extensions are supported by the hardware, we use point sprites
if ((SPK::GL::GLPointRenderer::loadGLExtPointSprite())&&(SPK::GL::GLPointRenderer::loadGLExtPointParameter()))
{
SPK::GL::GLPointRenderer* pointRenderer = SPK::GL::GLPointRenderer::create();
pointRenderer->setType(SPK::POINT_SPRITE);
pointRenderer->enableWorldSize(true);
SPK::GL::GLPointRenderer::setPixelPerUnit(45.0f * 3.14159f / 180.f,screenHeight);
pointRenderer->setSize(0.1f);
pointRenderer->setTexture(textureIndex);
renderer = pointRenderer;
}
else // else we use quads
{
SPK::GL::GLQuadRenderer* quadRenderer = SPK::GL::GLQuadRenderer::create();
quadRenderer->setTexturingMode(SPK::TEXTURE_2D);
quadRenderer->setScale(0.1f,0.1f);
quadRenderer->setTexture(textureIndex);
renderer = quadRenderer;
}
renderer->enableBlending(true);
renderer->setBlendingFunctions(GL_SRC_ALPHA,GL_ONE); // additive blending
renderer->setTextureBlending(GL_MODULATE); // the texture is modulated with the particle's color
renderer->enableRenderingHint(SPK::DEPTH_TEST,false); // the depth test is disabled
// Creates the zone
SPK::Point* source = SPK::Point::create();
// Creates the emitter
SPK::RandomEmitter* emitter = SPK::RandomEmitter::create();
emitter->setForce(2.8f,3.2f);
emitter->setZone(source);
emitter->setTank(500);
emitter->setFlow(-1); // Creates all the particles in the tank at the first frame
// Creates the Group
SPK::Group* group = SPK::Group::create(model,500); // 500 particles is the maximum capacity of the group
group->addEmitter(emitter);
group->setGravity(SPK::Vector3D(0.0f,-1.0f,0.0f));
group->setFriction(2.0f);
group->setRenderer(renderer);
// Creates the System
SPK::System* system = SPK::System::create();
system->addGroup(group);
// Defines which objects will be shared by all systems
model->setShared(true);
renderer->setShared(true);
// Creates the base and gets a pointer to the base
return system->getSPKID();
}
SPK::SPK_ID createExplosion( const SparkDrawable::TextureIDMap& textureIDMap, int screenWidth, int screenHeight )
{
SparkDrawable::TextureIDMap::const_iterator itr;
GET_TEXTURE_ID( "explosion", textureExplosion );
GET_TEXTURE_ID( "flash", textureFlash );
GET_TEXTURE_ID( "spark1", textureSpark1 );
GET_TEXTURE_ID( "spark2", textureSpark2 );
GET_TEXTURE_ID( "wave", textureWave );
//
// Renderers
//
// smoke renderer
SPK::GL::GLQuadRenderer* smokeRenderer = SPK::GL::GLQuadRenderer::create();
smokeRenderer->setTexturingMode(SPK::TEXTURE_2D);
smokeRenderer->setTexture(textureExplosion);
smokeRenderer->setTextureBlending(GL_MODULATE);
smokeRenderer->setAtlasDimensions(2,2); // uses 4 different patterns in the texture
smokeRenderer->setBlending(SPK::BLENDING_ALPHA);
smokeRenderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
smokeRenderer->setShared(true);
// flame renderer
SPK::GL::GLQuadRenderer* flameRenderer = SPK::GL::GLQuadRenderer::create();
flameRenderer->setTexturingMode(SPK::TEXTURE_2D);
flameRenderer->setTexture(textureExplosion);
flameRenderer->setTextureBlending(GL_MODULATE);
flameRenderer->setAtlasDimensions(2,2);
flameRenderer->setBlending(SPK::BLENDING_ADD);
flameRenderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
flameRenderer->setShared(true);
// flash renderer
SPK::GL::GLQuadRenderer* flashRenderer = SPK::GL::GLQuadRenderer::create();
flashRenderer->setTexturingMode(SPK::TEXTURE_2D);
flashRenderer->setTexture(textureFlash);
flashRenderer->setTextureBlending(GL_REPLACE);
flashRenderer->setBlending(SPK::BLENDING_ADD);
flashRenderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
flashRenderer->setShared(true);
// spark 1 renderer
SPK::GL::GLQuadRenderer* spark1Renderer = SPK::GL::GLQuadRenderer::create();
spark1Renderer->setTexturingMode(SPK::TEXTURE_2D);
spark1Renderer->setTexture(textureSpark1);
spark1Renderer->setTextureBlending(GL_REPLACE);
spark1Renderer->setBlending(SPK::BLENDING_ADD);
spark1Renderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
spark1Renderer->setOrientation(SPK::DIRECTION_ALIGNED); // sparks are oriented function o their velocity
spark1Renderer->setScale(0.05f,1.0f); // thin rectangles
spark1Renderer->setShared(true);
// spark 2 renderer
SPK::GL::GLRenderer* spark2Renderer = NULL;
if ( SPK::GL::GLPointRenderer::loadGLExtPointSprite() &&
SPK::GL::GLPointRenderer::loadGLExtPointParameter()) // uses point sprite if possible
{
SPK::GL::GLPointRenderer::setPixelPerUnit(45.0f * osg::PI / 180.0f, screenHeight);
SPK::GL::GLPointRenderer* pointRenderer = SPK::GL::GLPointRenderer::create();
pointRenderer->setType(SPK::POINT_SPRITE);
pointRenderer->setTexture(textureSpark2);
pointRenderer->setTextureBlending(GL_MODULATE);
pointRenderer->enableWorldSize(true);
pointRenderer->setSize(0.02f);
spark2Renderer = pointRenderer;
}
else
{
SPK::GL::GLQuadRenderer* quadRenderer = SPK::GL::GLQuadRenderer::create();
quadRenderer->setTexturingMode(SPK::TEXTURE_2D);
quadRenderer->setTexture(textureSpark2);
quadRenderer->setTextureBlending(GL_MODULATE);
quadRenderer->setScale(0.02f,0.02f);
spark2Renderer = quadRenderer;
}
spark2Renderer->setBlending(SPK::BLENDING_ADD);
spark2Renderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
spark2Renderer->setShared(true);
// wave renderer
SPK::GL::GLQuadRenderer* waveRenderer = SPK::GL::GLQuadRenderer::create();
waveRenderer->setTexturingMode(SPK::TEXTURE_2D);
waveRenderer->setTexture(textureWave);
waveRenderer->setTextureBlending(GL_MODULATE);
waveRenderer->setBlending(SPK::BLENDING_ALPHA);
waveRenderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
waveRenderer->enableRenderingHint(SPK::ALPHA_TEST,true); // uses the alpha test
waveRenderer->setAlphaTestThreshold(0.0f);
waveRenderer->setOrientation(SPK::FIXED_ORIENTATION); // the orientatin is fixed
waveRenderer->lookVector.set(0.0f,1.0f,0.0f);
waveRenderer->upVector.set(1.0f,0.0f,0.0f); // we dont really care about the up axis
waveRenderer->setShared(true);
//
// Models
//
SPK::Interpolator* interpolator = NULL; // pointer to an interpolator that is used to retrieve interpolators
// smoke model
SPK::Model* smokeModel = SPK::Model::create(
SPK::FLAG_RED | SPK::FLAG_GREEN | SPK::FLAG_BLUE | SPK::FLAG_ALPHA |
SPK::FLAG_SIZE | SPK::FLAG_ANGLE | SPK::FLAG_TEXTURE_INDEX,
SPK::FLAG_SIZE | SPK::FLAG_ANGLE,
SPK::FLAG_SIZE | SPK::FLAG_ANGLE | SPK::FLAG_TEXTURE_INDEX,
SPK::FLAG_ALPHA);
smokeModel->setParam(SPK::PARAM_RED,0.2f);
smokeModel->setParam(SPK::PARAM_GREEN,0.2f);
smokeModel->setParam(SPK::PARAM_BLUE,0.2f);
smokeModel->setParam(SPK::PARAM_SIZE,0.6f,0.8f,1.0f,1.4f);
smokeModel->setParam(SPK::PARAM_TEXTURE_INDEX,0.0f,4.0f);
smokeModel->setParam(SPK::PARAM_ANGLE,0.0f,osg::PI * 0.5f,0.0f,osg::PI * 0.5f);
smokeModel->setLifeTime(2.5f,3.0f);
smokeModel->setShared(true);
interpolator = smokeModel->getInterpolator(SPK::PARAM_ALPHA);
interpolator->addEntry(0.0f,0.0f);
interpolator->addEntry(0.4f,0.4f,0.6f);
interpolator->addEntry(0.6f,0.4f,0.6f);
interpolator->addEntry(1.0f,0.0f);
// flame model
SPK::Model* flameModel = SPK::Model::create(
SPK::FLAG_RED | SPK::FLAG_GREEN | SPK::FLAG_BLUE | SPK::FLAG_ALPHA |
SPK::FLAG_SIZE | SPK::FLAG_ANGLE | SPK::FLAG_TEXTURE_INDEX,
SPK::FLAG_ANGLE | SPK::FLAG_RED | SPK::FLAG_GREEN | SPK::FLAG_BLUE,
SPK::FLAG_ANGLE | SPK::FLAG_TEXTURE_INDEX,
SPK::FLAG_SIZE | SPK::FLAG_ALPHA);
flameModel->setParam(SPK::PARAM_RED,1.0f,0.2f);
flameModel->setParam(SPK::PARAM_GREEN,0.5f,0.2f);
flameModel->setParam(SPK::PARAM_BLUE,0.2f,0.2f);
flameModel->setParam(SPK::PARAM_TEXTURE_INDEX,0.0f,4.0f);
flameModel->setParam(SPK::PARAM_ANGLE,0.0f,osg::PI * 0.5f,0.0f,osg::PI * 0.5f);
flameModel->setLifeTime(1.5f,2.0f);
flameModel->setShared(true);
interpolator = flameModel->getInterpolator(SPK::PARAM_SIZE);
interpolator->addEntry(0.0f,0.25f);
interpolator->addEntry(0.02f,0.6f,0.8f);
interpolator->addEntry(1.0f,1.0f,1.4f);
interpolator = flameModel->getInterpolator(SPK::PARAM_ALPHA);
interpolator->addEntry(0.5f,1.0f);
interpolator->addEntry(1.0f,0.0f);
// flash model
SPK::Model* flashModel = SPK::Model::create(
SPK::FLAG_ALPHA | SPK::FLAG_SIZE | SPK::FLAG_ANGLE,
SPK::FLAG_NONE,
SPK::FLAG_ANGLE,
SPK::FLAG_ALPHA | SPK::FLAG_SIZE);
flashModel->setParam(SPK::PARAM_ANGLE,0.0f,2.0f * osg::PI);
flashModel->setLifeTime(0.5f,0.5f);
flashModel->setShared(true);
interpolator = flashModel->getInterpolator(SPK::PARAM_SIZE);
interpolator->addEntry(0.0f,0.25f);
interpolator->addEntry(0.1f,1.0f,2.0f);
interpolator = flashModel->getInterpolator(SPK::PARAM_ALPHA);
interpolator->addEntry(0.0f,1.0f);
interpolator->addEntry(0.4f,0.0f);
// spark 1 model
SPK::Model* spark1Model = SPK::Model::create(
SPK::FLAG_SIZE | SPK::FLAG_ALPHA,
SPK::FLAG_ALPHA,
SPK::FLAG_SIZE);
spark1Model->setParam(SPK::PARAM_ALPHA,1.0f,0.0f);
spark1Model->setParam(SPK::PARAM_SIZE,0.2f,0.4f);
spark1Model->setLifeTime(0.2f,1.0f);
spark1Model->setShared(true);
// spark 2 model
SPK::Model* spark2Model = SPK::Model::create(
SPK::FLAG_RED | SPK::FLAG_GREEN | SPK::FLAG_BLUE | SPK::FLAG_ALPHA,
SPK::FLAG_GREEN | SPK::FLAG_BLUE | SPK::FLAG_ALPHA,
SPK::FLAG_GREEN);
spark2Model->setParam(SPK::PARAM_ALPHA,1.0f,0.0f);
spark2Model->setParam(SPK::PARAM_RED,1.0f);
spark2Model->setParam(SPK::PARAM_GREEN,1.0f,1.0f,0.3f,1.0f);
spark2Model->setParam(SPK::PARAM_BLUE,0.7f,0.3f);
spark2Model->setLifeTime(1.0f,3.0f);
spark2Model->setShared(true);
// wave model
SPK::Model* waveModel = SPK::Model::create(
SPK::FLAG_ALPHA | SPK::FLAG_SIZE,
SPK::FLAG_SIZE | SPK::FLAG_ALPHA);
waveModel->setParam(SPK::PARAM_SIZE,0.0f,4.0f);
waveModel->setParam(SPK::PARAM_ALPHA,0.2f,0.0f);
waveModel->setLifeTime(0.8f,0.8f);
waveModel->setShared(true);
//
// Emitters
//
SPK::Sphere* explosionSphere = SPK::Sphere::create(SPK::Vector3D(0.0f,0.0f,0.0f),0.4f);
// smoke emitter
SPK::RandomEmitter* smokeEmitter = SPK::RandomEmitter::create();
smokeEmitter->setZone(SPK::Sphere::create(SPK::Vector3D(0.0f,0.0f,0.0f),0.6f),false);
smokeEmitter->setFlow(-1);
smokeEmitter->setTank(15);
smokeEmitter->setForce(0.02f,0.04f);
// flame emitter
SPK::NormalEmitter* flameEmitter = SPK::NormalEmitter::create();
flameEmitter->setZone(explosionSphere);
flameEmitter->setFlow(-1);
flameEmitter->setTank(15);
flameEmitter->setForce(0.06f,0.1f);
// flash emitter
SPK::StaticEmitter* flashEmitter = SPK::StaticEmitter::create();
flashEmitter->setZone(SPK::Sphere::create(SPK::Vector3D(0.0f,0.0f,0.0f),0.1f));
flashEmitter->setFlow(-1);
flashEmitter->setTank(3);
// spark 1 emitter
SPK::NormalEmitter* spark1Emitter = SPK::NormalEmitter::create();
spark1Emitter->setZone(explosionSphere);
spark1Emitter->setFlow(-1);
spark1Emitter->setTank(20);
spark1Emitter->setForce(2.0f,3.0f);
// spark 2 emitter
SPK::NormalEmitter* spark2Emitter = SPK::NormalEmitter::create();
spark2Emitter->setZone(explosionSphere);
spark2Emitter->setFlow(-1);
spark2Emitter->setTank(400);
spark2Emitter->setForce(0.4f,0.8f);
// wave emitter
SPK::StaticEmitter* waveEmitter = SPK::StaticEmitter::create();
waveEmitter->setZone(SPK::Point::create());
waveEmitter->setFlow(-1);
waveEmitter->setTank(1);
//
// Groups
//
// smoke group
SPK::Group* smokeGroup = SPK::Group::create(smokeModel,15);
smokeGroup->addEmitter(smokeEmitter);
smokeGroup->setRenderer(smokeRenderer);
smokeGroup->setGravity(SPK::Vector3D(0.0f,0.0f,0.05f));
// flame group
SPK::Group* flameGroup = SPK::Group::create(flameModel,15);
flameGroup->addEmitter(flameEmitter);
flameGroup->setRenderer(flameRenderer);
// flash group
SPK::Group* flashGroup = SPK::Group::create(flashModel,3);
flashGroup->addEmitter(flashEmitter);
flashGroup->setRenderer(flashRenderer);
// spark 1 group
SPK::Group* spark1Group = SPK::Group::create(spark1Model,20);
spark1Group->addEmitter(spark1Emitter);
spark1Group->setRenderer(spark1Renderer);
spark1Group->setGravity(SPK::Vector3D(0.0f,0.0f,-1.5f));
// spark 2 group
SPK::Group* spark2Group = SPK::Group::create(spark2Model,400);
spark2Group->addEmitter(spark2Emitter);
spark2Group->setRenderer(spark2Renderer);
spark2Group->setGravity(SPK::Vector3D(0.0f,0.0f,-0.3f));
spark2Group->setFriction(0.4f);
// wave group
SPK::Group* waveGroup = SPK::Group::create(waveModel,1);
waveGroup->addEmitter(waveEmitter);
waveGroup->setRenderer(waveRenderer);
//
// System
//
SPK::System* system = SPK::System::create();
system->addGroup(waveGroup);
system->addGroup(smokeGroup);
system->addGroup(flameGroup);
system->addGroup(flashGroup);
system->addGroup(spark1Group);
system->addGroup(spark2Group);
return system->getSPKID();
}