Changeset 6822 in orxonox.OLD for trunk/src/lib/particles/dot_emitter.cc

Timestamp:

Jan 29, 2006, 1:57:03 AM (20 years ago)

Author:

bensch

Message:

trunk: ParticleEmitters now splitted into SubClasses.
Also fixed a little Boeg in the ClassID

File:

• trunk/src/lib/particles/dot_emitter.cc (copied) (copied from trunk/src/lib/particles/particle_emitter.cc) (4 diffs)

trunk/src/lib/particles/dot_emitter.cc

@@ -16 +16 @@
 #define DEBUG_SPECIAL_MODULE DEBUG_MODULE_GRAPHICS
 
-#include "particle_emitter.h"
+#include "dot_emitter.h"
 
 #include "particle_system.h"
@@ -28 +28 @@
 
 
-CREATE_FACTORY(ParticleEmitter, CL_PARTICLE_EMITTER);
+CREATE_FACTORY(DotEmitter, CL_DOT_EMITTER);
 
 /**
  *  standard constructor
 */
-ParticleEmitter::ParticleEmitter(const Vector& direction, float angle, float emissionRate,
-                  float velocity)
+DotEmitter::DotEmitter(const Vector& direction, float angle, float emissionRate,
+                       float velocity)
+  : ParticleEmitter(direction, angle, emissionRate, velocity)
 {
   this->init();
-
-  this->direction = direction;
-  this->setSpread(angle);
-  this->setEmissionRate(emissionRate);
-  this->setEmissionVelocity(velocity);
 }
 
 /**
- *  constructs and loads a ParticleEmitter from a XML-element
+ *  constructs and loads a DotEmitter from a XML-element
  * @param root the XML-element to load from
 */
-ParticleEmitter::ParticleEmitter(const TiXmlElement* root)
+DotEmitter::DotEmitter(const TiXmlElement* root)
+  : ParticleEmitter()
 {
   this->init();
@@ -61 +58 @@
    removes the EmitterSystem from the ParticleEngine
 */
-ParticleEmitter::~ParticleEmitter ()
+DotEmitter::~DotEmitter ()
 {
   this->setSystem(NULL);
@@ -69 +66 @@
   @brief initializes default values of a ParitcleEmitter
 */
-void ParticleEmitter::init()
+void DotEmitter::init()
 {
-  this->setClassID(CL_PARTICLE_EMITTER, "ParticleEmitter");
-
-  this->type = PARTICLE_EMITTER_DEFAULT_TYPE;
-  this->emitterSize = PARTICLE_EMITTER_DEFAULT_SIZE;
-  this->setInheritSpeed(PARTICLE_EMITTER_DEFAULT_INHERIT_SPEED);
-  this->setEmissionRate(PARTICLE_EMITTER_DEFAULT_EMISSION_RATE);
-  this->setSize(PARTICLE_EMITTER_DEFAULT_SIZE);
-  this->setEmissionMomentum(0);
-  this->setEmissionVelocity(1.0);
-  this->setSpread(M_PI);
-
-  this->system = NULL;
-
-  this->saveTime = 0.0;
+  this->setClassID(CL_DOT_EMITTER, "DotEmitter");
 }
 
-/**
- *  loads a ParticleEmitter from a XML-element
- * @param root the XML-element to load from
-*/
-void ParticleEmitter::loadParams(const TiXmlElement* root)
+void DotEmitter::emitParticles(unsigned int count) const
 {
-  PNode::loadParams(root);
+  Vector inheritVelocity = this->getVelocity() * this->inheritSpeed;
 
-  LoadParam(root, "type", this, ParticleEmitter, setType)
-    .describe("What type of emitter is this [dot, plane, cube, sphere].");
+  for (unsigned int i = 0; i < count; i++)
+  {
+    Vector randDir = Vector(rand()-RAND_MAX/2, rand()-RAND_MAX/2, rand()-RAND_MAX/2);
+    randDir.normalize();
+    randDir = (this->getAbsDir()*Quaternion(angle + randomAngle *((float)rand()/RAND_MAX -.5), randDir)).apply(this->direction);
+    Vector velocityV = randDir.getNormalized()*this->velocity + inheritVelocity;
 
-  LoadParam(root, "size", this, ParticleEmitter, setSize)
-    .describe("How big the emitter is (no effect on dot-emitters)");
+    // ROTATIONAL CALCULATION (this must not be done for all types of particles.)
+    randDir = Vector(rand()-RAND_MAX/2, rand()-RAND_MAX/2, rand()-RAND_MAX/2);
+    randDir.normalize();
+    Quaternion orient = Quaternion(M_PI, randDir);
+    Quaternion moment = Quaternion(this->momentum + this->momentumRandom, randDir);
 
-  LoadParam(root, "rate", this, ParticleEmitter, setEmissionRate)
-    .describe("How many particles should be emittet from this emitter");
+    this->getSystem()->addParticle(this->getAbsCoor(), velocityV, orient, moment);
 
-  LoadParam(root, "inherit-speed", this, ParticleEmitter, setInheritSpeed)
-    .describe("the extent, the speed of the emitter has on the particles");
-
-  LoadParam(root, "emission-velocity", this, ParticleEmitter, setEmissionVelocity)
-    .describe("How fast the particles are emittet (their initial speed)");
-
-  LoadParam(root, "emission-momentum", this, ParticleEmitter, setEmissionMomentum)
-      .describe("How fast the particles rotation is at emissiontime (their initial momentum)");
-
-  LoadParam(root, "spread", this, ParticleEmitter, setSpread)
-    .describe("The angle the particles are emitted from (angle, deviation)");
-
-
-  LoadParam(root, "emission-direction", this, ParticleEmitter, setDirection);
-}
-
-void ParticleEmitter::setSystem(ParticleSystem* system)
-{
-  if (system != NULL)
-    system->addEmitter(this);
-  else if (this->system != NULL)
-    this->system->removeEmitter(this);
-}
-
-/**
- *  this start the emitter
-*/
-void ParticleEmitter::start() {}
-
-
-/**
- *  this stops the emitter
-*/
-void ParticleEmitter::stop() {}
-
-
-
-
-
-/**
- * @param type the new Type of this emitter
-*/
-void ParticleEmitter::setType(EMITTER_TYPE type)
-{
-  this->type = type;
-}
-
-/**
- *  sets the type of emitter
- * @param type the type as a const char*
-   dot: EMITTER_DOT, plane: EMITTER_PLANE, cube: EMITTER_CUBE, sphere, EMITTER_SPHERE;
-*/
-void ParticleEmitter::setType(const char* type)
-{
-  if (!strcmp(type, "plane"))
-    this->setType(EMITTER_PLANE);
-  else if (!strcmp(type, "cube"))
-    this->setType(EMITTER_CUBE);
-  else if (!strcmp(type, "sphere"))
-    this->setType(EMITTER_SPHERE);
-  else
-    this->setType(EMITTER_DOT);
-}
-
-const char* ParticleEmitter::getTypeC() const
-{
-  if (this->type == EMITTER_PLANE)
-    return "EMITTER_PLANE";
-  else if (this->type == EMITTER_CUBE)
-    return "EMITTER_CUBE";
-  else if (this->type == EMITTER_SPHERE)
-    return "EMITTER_SPHERE";
-  else
-    return "EMITTER_DOT";
-}
-
-/**
- *  sets a new size to the emitter
-*/
-void ParticleEmitter::setSize(float emitterSize)
-{
-  if (emitterSize > 0.0)
-    this->emitterSize = emitterSize;
-  else
-    emitterSize = 0.0;
-}
-
-/**
- *  set the emission rate
- * @param emissionRate: sets the number of particles emitted per second
-
-   if you want to change the value of this variable during emission time (to make it more dynamic)
-   you may want to use the animation class
-*/
-void ParticleEmitter::setEmissionRate(float emissionRate)
-{
-  if (emissionRate > 0.0)
-    this->emissionRate = emissionRate;
-  else
-    this->emissionRate = 0.0;
-}
-
-/**
- *  how much of the speed from the ParticleEmitter should flow onto the ParticleSystem
- * @param value a Value between zero and one
-
-   if you want to change the value of this variable during emission time (to make it more dynamic)
-   you may want to use the animation class
-*/
-void ParticleEmitter::setInheritSpeed(float value)
-{
-  if (unlikely(value > 1.0))
-    this->inheritSpeed = 1;
-  else if (unlikely(value < 0.0))
-    this->inheritSpeed = 0;
-  else
-    this->inheritSpeed = value;
-}
-
-/**
- *  set the angle of the emitter
- * @param angle around the direction in which there are particles to be emitted
- * @param randomAngle A random spread-angle, the +- randomness of this option
-
-   if you want to change the value of this variable during emission time (to make it more dynamic)
-   you may want to use the animation class
-*/
-void ParticleEmitter::setSpread(float angle, float randomAngle)
-{
-  this->angle = angle;
-  this->randomAngle = randomAngle;
-}
-
-/**
- *  sets the initial velocity of all particles emitted
- * @param velocity The starting velocity of the emitted particles
- * @param randomVelocity A random starting velocity, the +- randomness of this option
-
-   if you want to change the value of this variable during emission time (to make it more dynamic)
-   you may want to use the animation class
-*/
-void ParticleEmitter::setEmissionVelocity(float velocity, float randomVelocity)
-{
-  this->velocity = velocity;
-  this->randomVelocity = randomVelocity;
-}
-
-/**
- *  sets the initial Momentum of all particles emitted
- * @param momentum the new Momentum (just a float for being not too complicated).
- * @param randomMomentum variation from the given value.
- */
-void ParticleEmitter::setEmissionMomentum(float momentum, float randomMomentum)
-{
-  this->momentum = momentum;
-  this->momentumRandom = randomMomentum;
-}
-
-/**
- *  this set the time to life of a particle, after which it will die
- * @param dt: the time to live in seconds
- * @param system: the system into which to emitt
-
-   if you want to change the value of this variable during emission time (to make it more dynamic)
-   you may want to use the animation class
-*/
-void ParticleEmitter::tick(float dt)
-{
-  assert (this->system != NULL);
-  if (likely(dt > 0.0 && this->emissionRate > 0.0))
-  {
-    // saving the time (particles only partly emitted in this timestep)
-    float count = (dt+this->saveTime) * this->emissionRate;
-    this->saveTime = modff(count, &count) / this->emissionRate;
-    PRINTF(5)("emitting %f particles, saving %f seconds for the next timestep\n", count, this->saveTime);
-
-    if (likely(count > 0))
-    {
-      Vector inheritVelocity = this->getVelocity() * this->inheritSpeed;
-      for (int i = 0; i < (int)count; i++)
-      {
-        Vector randDir = Vector(rand()-RAND_MAX/2, rand()-RAND_MAX/2, rand()-RAND_MAX/2);
-        randDir.normalize();
-        randDir = (this->getAbsDir()*Quaternion(angle + randomAngle *((float)rand()/RAND_MAX -.5), randDir)).apply(this->direction);
-        Vector velocityV = randDir.getNormalized()*this->velocity + inheritVelocity;
-
-        // this should spread the Particles evenly. if the Emitter is moved around quickly
-        Vector equalSpread = this->getVelocity() * rand()/RAND_MAX * dt;
-        Vector extension; // the Vector for different fields.
-
-        if (this->type & EMITTER_PLANE)
-        {
-          extension = Vector(this->emitterSize * ((float)rand()/RAND_MAX -.5), 0, this->emitterSize * ((float)rand()/RAND_MAX - .5));
-          extension = this->getAbsDir().apply(extension);
-        }
-        else if (this->type & EMITTER_CUBE)
-        {
-          extension = Vector((float)rand()/RAND_MAX -.5, (float)rand()/RAND_MAX -.5, (float)rand()/RAND_MAX -.5) * this->emitterSize;
-        }
-
-
-        // ROTATIONAL CALCULATION (this must not be done for all types of particles.)
-        randDir = Vector(rand()-RAND_MAX/2, rand()-RAND_MAX/2, rand()-RAND_MAX/2);
-        randDir.normalize();
-        Quaternion orient = Quaternion(M_PI, randDir);
-        Quaternion moment = Quaternion(this->momentum + this->momentumRandom, randDir);
-
-        this->system->addParticle(this->getAbsCoor() + extension - equalSpread, velocityV, orient, moment);
-      }
-    }
   }
 }
-
-/**
- *  outputs some nice debug information
-*/
-void ParticleEmitter::debug() const
-{
-  PRINT(0)(" Emitter %s\n", this->getName());
-  PRINT(0)("  EmissionRate: %f, Speed: %f, SpreadAngle: %f\n", this->getEmissionRate(), this->getEmissionVelocity(), this->getSpread());
-  PRINT(0)("  Size %f, Type: %s\n", this->getSize(), this->getTypeC());
-}