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more clean up of particle system

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This commit is contained in:
Jeffrey Ventrella 2013-07-17 18:10:30 -07:00
parent 9c2ea6e7e4
commit f89b1fcd4c
4 changed files with 70 additions and 87 deletions
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6
interface/src/Application.cpp
View file

@ -73,7 +73,7 @@ using namespace std;
static char STAR_FILE[] = "https://s3-us-west-1.amazonaws.com/highfidelity/stars.txt";
static char STAR_CACHE_FILE[] = "cachedStars.txt";
static const bool TESTING_PARTICLE_SYSTEM = false;
static const bool TESTING_PARTICLE_SYSTEM = true;
static const int BANDWIDTH_METER_CLICK_MAX_DRAG_LENGTH = 6; // farther dragged clicks are ignored
@ -3510,11 +3510,9 @@ void Application::updateParticleSystem(float deltaTime) {
_particleSystem.setShowingEmitter(_coolDemoParticleEmitter, true);
glm::vec3 particleEmitterPosition = glm::vec3(5.0f, 1.0f, 5.0f);
_particleSystem.setEmitterPosition(_coolDemoParticleEmitter, particleEmitterPosition);
float radius = 0.01f;
glm::vec4 color(0.0f, 0.0f, 0.0f, 1.0f);
glm::vec3 velocity(0.0f, 0.1f, 0.0f);
float lifespan = 100000.0f;
_particleSystem.emitParticlesNow(_coolDemoParticleEmitter, 1500, radius, color, velocity, lifespan);
_particleSystem.emitParticlesNow(_coolDemoParticleEmitter, 1500, velocity, lifespan);
}
// signal that the particle system has been initialized

12
interface/src/Hand.cpp
View file

@ -216,9 +216,13 @@ void Hand::updateFingerParticles(float deltaTime) {
if (!_particleSystemInitialized) {
for ( int f = 0; f< NUM_FINGERS_PER_HAND; f ++ ) {
_particleSystem.setShowingEmitter(f, true );
_fingerParticleEmitter[f] = _particleSystem.addEmitter();
assert( _fingerParticleEmitter[f] != -1 );
ParticleSystem::ParticleAttributes attributes;
// set attributes for each life stage of the particle:
@ -277,17 +281,17 @@ void Hand::updateFingerParticles(float deltaTime) {
} else {
fingerDirection = IDENTITY_UP;
}
glm::quat particleEmitterRotation = rotationBetween(palm.getNormal(), fingerDirection);
glm::quat particleEmitterRotation = rotationBetween(IDENTITY_UP, fingerDirection);
//glm::quat particleEmitterRotation = glm::angleAxis(0.0f, fingerDirection);
_particleSystem.setEmitterPosition(_fingerParticleEmitter[f], particleEmitterPosition);
_particleSystem.setEmitterRotation(_fingerParticleEmitter[f], particleEmitterRotation);
float radius = 0.005f;
const glm::vec4 color(1.0f, 0.6f, 0.0f, 0.5f);
const glm::vec3 velocity = fingerDirection * 0.002f;
const float lifespan = 1.0f;
_particleSystem.emitParticlesNow(_fingerParticleEmitter[f], 1, radius, color, velocity, lifespan);
_particleSystem.emitParticlesNow(_fingerParticleEmitter[f], 1, velocity, lifespan);
}
}
}

99
interface/src/ParticleSystem.cpp
View file

@ -21,36 +21,35 @@ ParticleSystem::ParticleSystem() {
_numParticles = 0;
_upDirection = glm::vec3(0.0f, 1.0f, 0.0f); // default
for (unsigned int e = 0; e < MAX_EMITTERS; e++) {
_emitter[e].position = glm::vec3(0.0f, 0.0f, 0.0f);
_emitter[e].rotation = glm::quat();
_emitter[e].right = IDENTITY_RIGHT;
_emitter[e].up = IDENTITY_UP;
_emitter[e].front = IDENTITY_FRONT;
_emitter[e].visible = false;
_emitter[e].baseParticle.alive = false;
_emitter[e].baseParticle.age = 0.0f;
_emitter[e].baseParticle.lifespan = 0.0f;
_emitter[e].baseParticle.radius = 0.0f;
_emitter[e].baseParticle.emitterIndex = 0;
_emitter[e].baseParticle.position = glm::vec3(0.0f, 0.0f, 0.0f);
_emitter[e].baseParticle.velocity = glm::vec3(0.0f, 0.0f, 0.0f);
for (unsigned int emitterIndex = 0; emitterIndex < MAX_EMITTERS; emitterIndex++) {
_emitter[emitterIndex].position = glm::vec3(0.0f, 0.0f, 0.0f);
_emitter[emitterIndex].rotation = glm::quat();
_emitter[emitterIndex].visible = false;
_emitter[emitterIndex].baseParticle.alive = false;
_emitter[emitterIndex].baseParticle.age = 0.0f;
_emitter[emitterIndex].baseParticle.lifespan = 0.0f;
_emitter[emitterIndex].baseParticle.radius = 0.0f;
_emitter[emitterIndex].baseParticle.emitterIndex = 0;
_emitter[emitterIndex].baseParticle.position = glm::vec3(0.0f, 0.0f, 0.0f);
_emitter[emitterIndex].baseParticle.velocity = glm::vec3(0.0f, 0.0f, 0.0f);
for (int s = 0; s<NUM_PARTICLE_LIFE_STAGES; s++) {
_emitter[e].particleAttributes[s].radius = DEFAULT_PARTICLE_RADIUS;
_emitter[e].particleAttributes[s].color = glm::vec4(0.0f, 0.0f, 0.0f, 0.0f);
_emitter[e].particleAttributes[s].bounce = DEFAULT_PARTICLE_BOUNCE;
_emitter[e].particleAttributes[s].airFriction = DEFAULT_PARTICLE_AIR_FRICTION;
_emitter[e].particleAttributes[s].gravity = 0.0f;
_emitter[e].particleAttributes[s].jitter = 0.0f;
_emitter[e].particleAttributes[s].emitterAttraction = 0.0f;
_emitter[e].particleAttributes[s].tornadoForce = 0.0f;
_emitter[e].particleAttributes[s].neighborAttraction = 0.0f;
_emitter[e].particleAttributes[s].neighborRepulsion = 0.0f;
_emitter[e].particleAttributes[s].collisionSphereRadius = 0.0f;
_emitter[e].particleAttributes[s].collisionSpherePosition = glm::vec3(0.0f, 0.0f, 0.0f);
_emitter[e].particleAttributes[s].usingCollisionSphere = false;
for (int lifeStage = 0; lifeStage<NUM_PARTICLE_LIFE_STAGES; lifeStage++) {
ParticleAttributes * a = &_emitter[emitterIndex].particleAttributes[lifeStage];
a->radius = DEFAULT_PARTICLE_RADIUS;
a->color = glm::vec4(0.0f, 0.0f, 0.0f, 0.0f);
a->bounce = DEFAULT_PARTICLE_BOUNCE;
a->airFriction = DEFAULT_PARTICLE_AIR_FRICTION;
a->gravity = 0.0f;
a->jitter = 0.0f;
a->emitterAttraction = 0.0f;
a->tornadoForce = 0.0f;
a->neighborAttraction = 0.0f;
a->neighborRepulsion = 0.0f;
a->collisionSphereRadius = 0.0f;
a->collisionSpherePosition = glm::vec3(0.0f, 0.0f, 0.0f);
a->usingCollisionSphere = false;
}
};
@ -79,11 +78,6 @@ int ParticleSystem::addEmitter() {
void ParticleSystem::simulate(float deltaTime) {
// update emitters
for (unsigned int e = 0; e < _numEmitters; e++) {
updateEmitter(e, deltaTime);
}
// update particles
for (unsigned int p = 0; p < _numParticles; p++) {
if (_particle[p].alive) {
@ -96,23 +90,14 @@ void ParticleSystem::simulate(float deltaTime) {
}
}
void ParticleSystem::updateEmitter(int e, float deltaTime) {
_emitter[e].front = _emitter[e].rotation * IDENTITY_FRONT;
_emitter[e].right = _emitter[e].rotation * IDENTITY_RIGHT;
_emitter[e].up = _emitter[e].rotation * IDENTITY_UP;
}
void ParticleSystem::emitParticlesNow(int e, int num, float radius, glm::vec4 color, glm::vec3 velocity, float lifespan) {
void ParticleSystem::emitParticlesNow(int e, int num, glm::vec3 velocity, float lifespan) {
for (unsigned int p = 0; p < num; p++) {
createParticle(e, _emitter[e].position, velocity, radius, color, lifespan);
createParticle(e, velocity, lifespan);
}
}
void ParticleSystem::createParticle(int e, glm::vec3 position, glm::vec3 velocity, float radius, glm::vec4 color, float lifespan) {
void ParticleSystem::createParticle(int e, glm::vec3 velocity, float lifespan) {
for (unsigned int p = 0; p < MAX_PARTICLES; p++) {
if (!_particle[p].alive) {
@ -121,12 +106,10 @@ void ParticleSystem::createParticle(int e, glm::vec3 position, glm::vec3 velocit
_particle[p].lifespan = lifespan;
_particle[p].alive = true;
_particle[p].age = 0.0f;
_particle[p].position = position;
_particle[p].velocity = velocity;
_particle[p].color = color;
_particle[p].radius = _emitter[e].particleAttributes[0].radius;
_particle[p].color = _emitter[e].particleAttributes[0].color;
_particle[p].position = _emitter[e].position;
_particle[p].radius = _emitter[e].particleAttributes[0].radius;
_particle[p].color = _emitter[e].particleAttributes[0].color;
_numParticles ++;
@ -227,7 +210,11 @@ void ParticleSystem::updateParticle(int p, float deltaTime) {
}
// apply tornado force
glm::vec3 tornadoDirection = glm::cross(vectorToHome, myEmitter.up);
glm::vec3 emitterUp = myEmitter.rotation * IDENTITY_UP;
glm::vec3 tornadoDirection = glm::cross(vectorToHome, emitterUp);
_particle[p].velocity += tornadoDirection * myEmitter.particleAttributes[lifeStage].tornadoForce * deltaTime;
// apply air friction
@ -363,10 +350,10 @@ void ParticleSystem::renderParticle(int p) {
void ParticleSystem::renderEmitter(int e, float size) {
glm::vec3 r = _emitter[e].right * size;
glm::vec3 u = _emitter[e].up * size;
glm::vec3 f = _emitter[e].front * size;
glm::vec3 r = _emitter[e].rotation * IDENTITY_FRONT * size;
glm::vec3 u = _emitter[e].rotation * IDENTITY_RIGHT * size;
glm::vec3 f = _emitter[e].rotation * IDENTITY_UP * size;
glLineWidth(2.0f);

40
interface/src/ParticleSystem.h
View file

@ -4,7 +4,6 @@
//
// Created by Jeffrey on July 10, 2013
//
//
#ifndef hifi_ParticleSystem_h
#define hifi_ParticleSystem_h
@ -38,15 +37,15 @@ public:
ParticleSystem();
int addEmitter(); // add (create) an emitter and get its unique id
void emitParticlesNow(int emitterIndex, int numParticles, float radius, glm::vec4 color, glm::vec3 velocity, float lifespan);
int addEmitter(); // add (create new) emitter and get its unique id
void emitParticlesNow(int emitterIndex, int numParticles, glm::vec3 velocity, float lifespan);
void simulate(float deltaTime);
void render();
void setUpDirection(glm::vec3 upDirection) {_upDirection = upDirection;} // tell particle system which direction is up
void setEmitterBaseParticle(int emitterIndex, bool showing );
void setEmitterBaseParticle(int emitterIndex, bool showing, float radius, glm::vec4 color );
void setParticleAttributes (int emitterIndex, ParticleAttributes attributes);
void setParticleAttributes (int emitterIndex, ParticleAttributes attributes);
void setParticleAttributes (int emitterIndex, int lifeStage, ParticleAttributes attributes);
void setEmitterPosition (int emitterIndex, glm::vec3 position) { _emitter[emitterIndex].position = position; } // set position of emitter
void setEmitterRotation (int emitterIndex, glm::quat rotation) { _emitter[emitterIndex].rotation = rotation; } // set rotation of emitter
@ -55,38 +54,33 @@ public:
private:
struct Particle {
bool alive; // is the particle active?
glm::vec3 position; // position
glm::vec3 velocity; // velocity
glm::vec4 color; // color (rgba)
float age; // age in seconds
float radius; // radius
float lifespan; // how long this particle stays alive (in seconds)
int emitterIndex; // which emitter created this particle?
bool alive; // is the particle active?
glm::vec3 position; // position
glm::vec3 velocity; // velocity
glm::vec4 color; // color (rgba)
float age; // age in seconds
float radius; // radius
float lifespan; // how long this particle stays alive (in seconds)
int emitterIndex; // which emitter created this particle?
};
struct Emitter {
glm::vec3 position;
glm::quat rotation;
glm::vec3 right; // derived from rotation
glm::vec3 up; // derived from rotation
glm::vec3 front; // derived from rotation
bool visible;
Particle baseParticle; // a non-physical particle at the emitter position
ParticleAttributes particleAttributes[NUM_PARTICLE_LIFE_STAGES]; // the attributes of particles emitted from this emitter
};
glm::vec3 _upDirection;
Emitter _emitter[MAX_EMITTERS];
Particle _particle[MAX_PARTICLES];
int _numParticles;
int _numEmitters;
glm::vec3 _upDirection;
Emitter _emitter[MAX_EMITTERS];
Particle _particle[MAX_PARTICLES];
int _numParticles;
int _numEmitters;
// private methods
void updateEmitter(int e, float deltaTime);
void updateParticle(int index, float deltaTime);
void createParticle(int e, glm::vec3 position, glm::vec3 velocity, float radius, glm::vec4 color, float lifespan);
//void runSpecialEffectsTest(int e, float deltaTime); // for debugging and artistic exploration
void createParticle(int e, glm::vec3 velocity, float lifespan);
void killParticle(int p);
void renderEmitter(int emitterIndex, float size);
void renderParticle(int p);