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Merge pull request #701 from Ventrella/particles
added life stages to particles for effects to change over time
This commit is contained in:
Philip Rosedale
commit
0bc0f3ca7a
4 changed files with 257 additions and 108 deletions
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@ -2022,7 +2022,7 @@ void Application::update(float deltaTime) {
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if (_myAvatar.getMode() == AVATAR_MODE_WALKING) {
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_handControl.stop();
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}
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// Update from Touch
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if (_isTouchPressed) {
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float TOUCH_YAW_SCALE = -50.0f;
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@ -3546,6 +3546,7 @@ void Application::updateParticleSystem(float deltaTime) {
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ParticleSystem::ParticleAttributes attributes;
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attributes.radius = 0.01f;
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attributes.gravity = 0.0f + 0.05f * sinf( t * 0.52f );
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attributes.airFriction = 2.5 + 2.0f * sinf( t * 0.32f );
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attributes.jitter = 0.05f + 0.05f * sinf( t * 0.42f );
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@ -3562,7 +3563,7 @@ void Application::updateParticleSystem(float deltaTime) {
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attributes.gravity = 0.0f;
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}
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_particleSystem.setParticleAttributesForEmitter(_coolDemoParticleEmitter, attributes);
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_particleSystem.setParticleAttributes(_coolDemoParticleEmitter, attributes);
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}
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_particleSystem.setUpDirection(glm::vec3(0.0f, 1.0f, 0.0f));
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@ -29,6 +29,9 @@ Hand::Hand(Avatar* owningAvatar) :
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// initialize all finger particle emitters with an invalid id as default
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for (int f = 0; f< NUM_FINGERS_PER_HAND; f ++ ) {
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_fingerParticleEmitter[f] = -1;
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//glm::vec4 color(1.0f, 0.6f, 0.0f, 0.5f);
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//_particleSystem.setEmitterBaseParticle(f, true, 0.012f, color);
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}
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}
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@ -176,10 +179,43 @@ void Hand::setLeapHands(const std::vector<glm::vec3>& handPositions,
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void Hand::updateFingerParticles(float deltaTime) {
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if (!_particleSystemInitialized) {
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for ( int f = 0; f< NUM_FINGERS_PER_HAND; f ++ ) {
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_fingerParticleEmitter[f] = _particleSystem.addEmitter();
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_particleSystem.setShowingEmitter(_fingerParticleEmitter[f], true);
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ParticleSystem::ParticleAttributes attributes;
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// set attributes for each life stage of the particle:
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attributes.radius = 0.0f;
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attributes.color = glm::vec4( 1.0f, 1.0f, 0.5f, 0.5f);
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attributes.gravity = 0.0f;
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attributes.airFriction = 0.0f;
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attributes.jitter = 0.002f;
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attributes.emitterAttraction = 0.0f;
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attributes.tornadoForce = 0.0f;
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attributes.neighborAttraction = 0.0f;
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attributes.neighborRepulsion = 0.0f;
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attributes.bounce = 1.0f;
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attributes.usingCollisionSphere = false;
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_particleSystem.setParticleAttributes(_fingerParticleEmitter[f], 0, attributes);
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attributes.radius = 0.01f;
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attributes.jitter = 0.0f;
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attributes.gravity = -0.005f;
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attributes.color = glm::vec4( 1.0f, 0.2f, 0.0f, 0.4f);
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_particleSystem.setParticleAttributes(_fingerParticleEmitter[f], 1, attributes);
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attributes.radius = 0.01f;
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attributes.gravity = 0.0f;
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attributes.color = glm::vec4( 0.0f, 0.0f, 0.0f, 0.2f);
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_particleSystem.setParticleAttributes(_fingerParticleEmitter[f], 2, attributes);
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attributes.radius = 0.02f;
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attributes.color = glm::vec4( 0.0f, 0.0f, 0.0f, 0.0f);
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_particleSystem.setParticleAttributes(_fingerParticleEmitter[f], 3, attributes);
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}
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_particleSystemInitialized = true;
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} else {
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// update the particles
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@ -193,25 +229,25 @@ void Hand::updateFingerParticles(float deltaTime) {
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glm::vec3 particleEmitterPosition = leapPositionToWorldPosition(_fingerTips[f]);
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// this aspect is still being designed....
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glm::vec3 tilt = glm::vec3
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(
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30.0f * sinf( t * 0.55f ),
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0.0f,
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30.0f * cosf( t * 0.75f )
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);
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glm::quat particleEmitterRotation = glm::quat(glm::radians(tilt));
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glm::vec3 fingerDirection = particleEmitterPosition - leapPositionToWorldPosition(_fingerRoots[f]);
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float fingerLength = glm::length(fingerDirection);
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_particleSystem.setEmitterPosition(_fingerParticleEmitter[0], particleEmitterPosition);
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_particleSystem.setEmitterRotation(_fingerParticleEmitter[0], particleEmitterRotation);
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if (fingerLength > 0.0f) {
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fingerDirection /= fingerLength;
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} else {
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fingerDirection = IDENTITY_UP;
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}
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glm::quat particleEmitterRotation = rotationBetween(IDENTITY_UP, fingerDirection);
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_particleSystem.setEmitterPosition(_fingerParticleEmitter[f], particleEmitterPosition);
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_particleSystem.setEmitterRotation(_fingerParticleEmitter[f], particleEmitterRotation);
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float radius = 0.005f;
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glm::vec4 color(1.0f, 0.6f, 0.0f, 0.5f);
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glm::vec3 velocity(0.0f, 0.005f, 0.0f);
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float lifespan = 0.3f;
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_particleSystem.emitParticlesNow(_fingerParticleEmitter[0], 1, radius, color, velocity, lifespan);
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glm::vec3 velocity = fingerDirection * 0.002f;
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float lifespan = 1.0f;
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_particleSystem.emitParticlesNow(_fingerParticleEmitter[f], 1, radius, color, velocity, lifespan);
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}
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}
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@ -11,34 +11,47 @@
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#include "ParticleSystem.h"
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#include "Application.h"
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const float DEFAULT_PARTICLE_RADIUS = 0.01f;
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const float DEFAULT_PARTICLE_BOUNCE = 1.0f;
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const float DEFAULT_PARTICLE_AIR_FRICTION = 2.0f;
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ParticleSystem::ParticleSystem() {
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_timer = 0.0f;
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_numEmitters = 0;
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_numParticles = 0;
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_upDirection = glm::vec3(0.0f, 1.0f, 0.0f); // default
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for (unsigned int e = 0; e < MAX_EMITTERS; e++) {
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_emitter[e].position = glm::vec3(0.0f, 0.0f, 0.0f);
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_emitter[e].rotation = glm::quat();
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_emitter[e].right = IDENTITY_RIGHT;
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_emitter[e].up = IDENTITY_UP;
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_emitter[e].front = IDENTITY_FRONT;
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_emitter[e].showingEmitter = false;
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_emitter[e].particleAttributes.bounce = DEFAULT_PARTICLE_BOUNCE;
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_emitter[e].particleAttributes.airFriction = DEFAULT_PARTICLE_AIR_FRICTION;
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_emitter[e].particleAttributes.gravity = 0.0f;
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_emitter[e].particleAttributes.jitter = 0.0f;
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_emitter[e].particleAttributes.emitterAttraction = 0.0f;
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_emitter[e].particleAttributes.tornadoForce = 0.0f;
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_emitter[e].particleAttributes.neighborAttraction = 0.0f;
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_emitter[e].particleAttributes.neighborRepulsion = 0.0f;
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_emitter[e].particleAttributes.collisionSphereRadius = 0.0f;
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_emitter[e].particleAttributes.collisionSpherePosition = glm::vec3(0.0f, 0.0f, 0.0f);
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_emitter[e].particleAttributes.usingCollisionSphere = false;
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_emitter[e].position = glm::vec3(0.0f, 0.0f, 0.0f);
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_emitter[e].rotation = glm::quat();
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_emitter[e].right = IDENTITY_RIGHT;
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_emitter[e].up = IDENTITY_UP;
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_emitter[e].front = IDENTITY_FRONT;
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_emitter[e].visible = false;
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_emitter[e].baseParticle.alive = false;
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_emitter[e].baseParticle.age = 0.0f;
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_emitter[e].baseParticle.lifespan = 0.0f;
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_emitter[e].baseParticle.radius = 0.0f;
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_emitter[e].baseParticle.emitterIndex = 0;
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_emitter[e].baseParticle.position = glm::vec3(0.0f, 0.0f, 0.0f);
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_emitter[e].baseParticle.velocity = glm::vec3(0.0f, 0.0f, 0.0f);
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for (int s = 0; s<NUM_PARTICLE_LIFE_STAGES; s++) {
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_emitter[e].particleAttributes[s].radius = DEFAULT_PARTICLE_RADIUS;
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_emitter[e].particleAttributes[s].color = glm::vec4(0.0f, 0.0f, 0.0f, 0.0f);
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_emitter[e].particleAttributes[s].bounce = DEFAULT_PARTICLE_BOUNCE;
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_emitter[e].particleAttributes[s].airFriction = DEFAULT_PARTICLE_AIR_FRICTION;
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_emitter[e].particleAttributes[s].gravity = 0.0f;
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_emitter[e].particleAttributes[s].jitter = 0.0f;
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_emitter[e].particleAttributes[s].emitterAttraction = 0.0f;
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_emitter[e].particleAttributes[s].tornadoForce = 0.0f;
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_emitter[e].particleAttributes[s].neighborAttraction = 0.0f;
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_emitter[e].particleAttributes[s].neighborRepulsion = 0.0f;
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_emitter[e].particleAttributes[s].collisionSphereRadius = 0.0f;
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_emitter[e].particleAttributes[s].collisionSpherePosition = glm::vec3(0.0f, 0.0f, 0.0f);
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_emitter[e].particleAttributes[s].usingCollisionSphere = false;
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}
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};
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for (unsigned int p = 0; p < MAX_PARTICLES; p++) {
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@ -52,7 +65,6 @@ ParticleSystem::ParticleSystem() {
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}
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}
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int ParticleSystem::addEmitter() {
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_numEmitters ++;
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@ -75,11 +87,16 @@ void ParticleSystem::simulate(float deltaTime) {
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// update particles
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for (unsigned int p = 0; p < _numParticles; p++) {
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if (_particle[p].alive) {
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updateParticle(p, deltaTime);
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if (_particle[p].age > _particle[p].lifespan) {
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killParticle(p);
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} else {
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updateParticle(p, deltaTime);
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}
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}
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}
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}
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void ParticleSystem::updateEmitter(int e, float deltaTime) {
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_emitter[e].front = _emitter[e].rotation * IDENTITY_FRONT;
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@ -106,9 +123,11 @@ void ParticleSystem::createParticle(int e, glm::vec3 position, glm::vec3 velocit
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_particle[p].age = 0.0f;
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_particle[p].position = position;
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_particle[p].velocity = velocity;
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_particle[p].radius = radius;
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_particle[p].color = color;
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_particle[p].radius = _emitter[e].particleAttributes[0].radius;
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_particle[p].color = _emitter[e].particleAttributes[0].color;
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_numParticles ++;
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assert(_numParticles <= MAX_PARTICLES);
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@ -146,45 +165,72 @@ void ParticleSystem::setOrangeBlueColorPalette() {
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}
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void ParticleSystem::setParticleAttributesForEmitter(int emitterIndex, ParticleAttributes attributes) {
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void ParticleSystem::setParticleAttributes(int emitterIndex, ParticleAttributes attributes) {
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_emitter[emitterIndex].particleAttributes.bounce = attributes.bounce;
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_emitter[emitterIndex].particleAttributes.gravity = attributes.gravity;
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_emitter[emitterIndex].particleAttributes.airFriction = attributes.airFriction;
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_emitter[emitterIndex].particleAttributes.jitter = attributes.jitter;
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_emitter[emitterIndex].particleAttributes.emitterAttraction = attributes.emitterAttraction;
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_emitter[emitterIndex].particleAttributes.tornadoForce = attributes.tornadoForce;
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_emitter[emitterIndex].particleAttributes.neighborAttraction = attributes.neighborAttraction;
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_emitter[emitterIndex].particleAttributes.neighborRepulsion = attributes.neighborRepulsion;
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_emitter[emitterIndex].particleAttributes.usingCollisionSphere = attributes.usingCollisionSphere;
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_emitter[emitterIndex].particleAttributes.collisionSpherePosition = attributes.collisionSpherePosition;
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_emitter[emitterIndex].particleAttributes.collisionSphereRadius = attributes.collisionSphereRadius;
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for (int lifeStage = 0; lifeStage < NUM_PARTICLE_LIFE_STAGES; lifeStage ++ ) {
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setParticleAttributes(emitterIndex, lifeStage, attributes);
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}
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}
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void ParticleSystem::setParticleAttributes(int emitterIndex, int lifeStage, ParticleAttributes attributes) {
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ParticleAttributes * a = &_emitter[emitterIndex].particleAttributes[lifeStage];
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a->radius = attributes.radius;
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a->color = attributes.color;
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a->bounce = attributes.bounce;
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a->gravity = attributes.gravity;
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a->airFriction = attributes.airFriction;
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a->jitter = attributes.jitter;
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a->emitterAttraction = attributes.emitterAttraction;
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a->tornadoForce = attributes.tornadoForce;
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a->neighborAttraction = attributes.neighborAttraction;
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a->neighborRepulsion = attributes.neighborRepulsion;
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a->usingCollisionSphere = attributes.usingCollisionSphere;
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a->collisionSpherePosition = attributes.collisionSpherePosition;
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a->collisionSphereRadius = attributes.collisionSphereRadius;
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}
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void ParticleSystem::updateParticle(int p, float deltaTime) {
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_particle[p].age += deltaTime;
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assert(_particle[p].age <= _particle[p].lifespan);
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if (_particle[p].age > _particle[p].lifespan) {
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killParticle(p);
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float ageFraction = _particle[p].age / _particle[p].lifespan;
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int lifeStage = (int)( ageFraction * (NUM_PARTICLE_LIFE_STAGES-1) );
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float lifeStageFraction = ageFraction * ( NUM_PARTICLE_LIFE_STAGES - 1 ) - lifeStage;
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/*
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if ( p == 0 ) {
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printf( "lifespan = %f ageFraction = %f lifeStage = %d lifeStageFraction = %f\n", _particle[p].lifespan, ageFraction, lifeStage, lifeStageFraction );
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}
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*/
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_particle[p].radius
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= _emitter[_particle[p].emitterIndex].particleAttributes[lifeStage ].radius * (1.0f - lifeStageFraction)
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+ _emitter[_particle[p].emitterIndex].particleAttributes[lifeStage+1].radius * lifeStageFraction;
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_particle[p].color
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= _emitter[_particle[p].emitterIndex].particleAttributes[lifeStage ].color * (1.0f - lifeStageFraction)
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+ _emitter[_particle[p].emitterIndex].particleAttributes[lifeStage+1].color * lifeStageFraction;
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Emitter myEmitter = _emitter[_particle[p].emitterIndex];
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// apply random jitter
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float j = myEmitter.particleAttributes[lifeStage].jitter;
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_particle[p].velocity +=
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glm::vec3
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(
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-myEmitter.particleAttributes.jitter * ONE_HALF + myEmitter.particleAttributes.jitter * randFloat(),
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-myEmitter.particleAttributes.jitter * ONE_HALF + myEmitter.particleAttributes.jitter * randFloat(),
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-myEmitter.particleAttributes.jitter * ONE_HALF + myEmitter.particleAttributes.jitter * randFloat()
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-j * ONE_HALF + j * randFloat(),
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-j * ONE_HALF + j * randFloat(),
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-j * ONE_HALF + j * randFloat()
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) * deltaTime;
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// apply attraction to home position
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glm::vec3 vectorToHome = myEmitter.position - _particle[p].position;
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_particle[p].velocity += vectorToHome * myEmitter.particleAttributes.emitterAttraction * deltaTime;
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_particle[p].velocity += vectorToHome * myEmitter.particleAttributes[lifeStage].emitterAttraction * deltaTime;
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// apply neighbor attraction
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int neighbor = p + 1;
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@ -195,20 +241,20 @@ void ParticleSystem::updateParticle(int p, float deltaTime) {
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if ( _particle[neighbor].emitterIndex == _particle[p].emitterIndex) {
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glm::vec3 vectorToNeighbor = _particle[p].position - _particle[neighbor].position;
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_particle[p].velocity -= vectorToNeighbor * myEmitter.particleAttributes.neighborAttraction * deltaTime;
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_particle[p].velocity -= vectorToNeighbor * myEmitter.particleAttributes[lifeStage].neighborAttraction * deltaTime;
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float distanceToNeighbor = glm::length(vectorToNeighbor);
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if (distanceToNeighbor > 0.0f) {
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_particle[neighbor].velocity += (vectorToNeighbor / ( 1.0f + distanceToNeighbor * distanceToNeighbor)) * myEmitter.particleAttributes.neighborRepulsion * deltaTime;
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_particle[neighbor].velocity += (vectorToNeighbor / ( 1.0f + distanceToNeighbor * distanceToNeighbor)) * myEmitter.particleAttributes[lifeStage].neighborRepulsion * deltaTime;
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}
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}
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// apply tornado force
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glm::vec3 tornadoDirection = glm::cross(vectorToHome, myEmitter.up);
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_particle[p].velocity += tornadoDirection * myEmitter.particleAttributes.tornadoForce * deltaTime;
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_particle[p].velocity += tornadoDirection * myEmitter.particleAttributes[lifeStage].tornadoForce * deltaTime;
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// apply air friction
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float drag = 1.0 - myEmitter.particleAttributes.airFriction * deltaTime;
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float drag = 1.0 - myEmitter.particleAttributes[lifeStage].airFriction * deltaTime;
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if (drag < 0.0f) {
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_particle[p].velocity = glm::vec3(0.0f, 0.0f, 0.0f);
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} else {
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@ -216,7 +262,7 @@ void ParticleSystem::updateParticle(int p, float deltaTime) {
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}
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// apply gravity
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_particle[p].velocity -= _upDirection * myEmitter.particleAttributes.gravity * deltaTime;
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_particle[p].velocity -= _upDirection * myEmitter.particleAttributes[lifeStage].gravity * deltaTime;
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// update position by velocity
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_particle[p].position += _particle[p].velocity;
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@ -226,36 +272,66 @@ void ParticleSystem::updateParticle(int p, float deltaTime) {
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_particle[p].position.y = _particle[p].radius;
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if (_particle[p].velocity.y < 0.0f) {
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_particle[p].velocity.y *= -myEmitter.particleAttributes.bounce;
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_particle[p].velocity.y *= -myEmitter.particleAttributes[lifeStage].bounce;
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}
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}
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// collision with sphere
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if (myEmitter.particleAttributes.usingCollisionSphere) {
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glm::vec3 vectorToSphereCenter = myEmitter.particleAttributes.collisionSpherePosition - _particle[p].position;
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if (myEmitter.particleAttributes[lifeStage].usingCollisionSphere) {
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glm::vec3 vectorToSphereCenter = myEmitter.particleAttributes[lifeStage].collisionSpherePosition - _particle[p].position;
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float distanceToSphereCenter = glm::length(vectorToSphereCenter);
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float combinedRadius = myEmitter.particleAttributes.collisionSphereRadius + _particle[p].radius;
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float combinedRadius = myEmitter.particleAttributes[lifeStage].collisionSphereRadius + _particle[p].radius;
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if (distanceToSphereCenter < combinedRadius) {
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if (distanceToSphereCenter > 0.0f){
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glm::vec3 directionToSphereCenter = vectorToSphereCenter / distanceToSphereCenter;
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||||
_particle[p].position = myEmitter.particleAttributes.collisionSpherePosition - directionToSphereCenter * combinedRadius;
|
||||
_particle[p].position = myEmitter.particleAttributes[lifeStage].collisionSpherePosition - directionToSphereCenter * combinedRadius;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// do this at the end...
|
||||
_particle[p].age += deltaTime;
|
||||
}
|
||||
|
||||
void ParticleSystem::setCollisionSphere(int e, glm::vec3 position, float radius) {
|
||||
_emitter[e].particleAttributes.usingCollisionSphere = true;
|
||||
_emitter[e].particleAttributes.collisionSpherePosition = position;
|
||||
_emitter[e].particleAttributes.collisionSphereRadius = radius;
|
||||
|
||||
int lifeStage = 0;
|
||||
|
||||
_emitter[e].particleAttributes[lifeStage].usingCollisionSphere = true;
|
||||
_emitter[e].particleAttributes[lifeStage].collisionSpherePosition = position;
|
||||
_emitter[e].particleAttributes[lifeStage].collisionSphereRadius = radius;
|
||||
}
|
||||
|
||||
void ParticleSystem::setEmitterBaseParticle(int emitterIndex, bool showing ) {
|
||||
|
||||
_emitter[emitterIndex].baseParticle.alive = true;
|
||||
_emitter[emitterIndex].baseParticle.emitterIndex = emitterIndex;
|
||||
}
|
||||
|
||||
void ParticleSystem::setEmitterBaseParticle(int emitterIndex, bool showing, float radius, glm::vec4 color ) {
|
||||
|
||||
_emitter[emitterIndex].baseParticle.alive = true;
|
||||
_emitter[emitterIndex].baseParticle.emitterIndex = emitterIndex;
|
||||
_emitter[emitterIndex].baseParticle.radius = radius;
|
||||
_emitter[emitterIndex].baseParticle.color = color;
|
||||
}
|
||||
|
||||
|
||||
void ParticleSystem::render() {
|
||||
|
||||
// render the emitters
|
||||
for (unsigned int e = 0; e < _numEmitters; e++) {
|
||||
if (_emitter[e].showingEmitter) {
|
||||
for (int e = 0; e < _numEmitters; e++) {
|
||||
|
||||
if (_emitter[e].baseParticle.alive) {
|
||||
glColor4f(_emitter[e].baseParticle.color.r, _emitter[e].baseParticle.color.g, _emitter[e].baseParticle.color.b, _emitter[e].baseParticle.color.a );
|
||||
glPushMatrix();
|
||||
glTranslatef(_emitter[e].position.x, _emitter[e].position.y, _emitter[e].position.z);
|
||||
glutSolidSphere(_emitter[e].baseParticle.radius, 6, 6);
|
||||
glPopMatrix();
|
||||
}
|
||||
|
||||
if (_emitter[e].visible) {
|
||||
renderEmitter(e, 0.2f);
|
||||
}
|
||||
};
|
||||
|
|
@ -271,19 +347,49 @@ void ParticleSystem::render() {
|
|||
void ParticleSystem::renderParticle(int p) {
|
||||
|
||||
glColor4f(_particle[p].color.r, _particle[p].color.g, _particle[p].color.b, _particle[p].color.a );
|
||||
glPushMatrix();
|
||||
glTranslatef(_particle[p].position.x, _particle[p].position.y, _particle[p].position.z);
|
||||
glutSolidSphere(_particle[p].radius, 6, 6);
|
||||
glPopMatrix();
|
||||
|
||||
// render velocity lines
|
||||
glColor4f( _particle[p].color.x, _particle[p].color.y, _particle[p].color.z, 0.5f);
|
||||
glm::vec3 end = _particle[p].position - _particle[p].velocity * 2.0f;
|
||||
glBegin(GL_LINES);
|
||||
glVertex3f(_particle[p].position.x, _particle[p].position.y, _particle[p].position.z);
|
||||
glVertex3f(end.x, end.y, end.z);
|
||||
|
||||
glEnd();
|
||||
if (USE_BILLBOARD_RENDERING) {
|
||||
glm::vec3 cameraPosition = Application::getInstance()->getCamera()->getPosition();
|
||||
glm::vec3 viewVector = _particle[p].position - cameraPosition;
|
||||
float distance = glm::length(viewVector);
|
||||
|
||||
if (distance >= 0.0f) {
|
||||
viewVector /= distance;
|
||||
glm::vec3 up = glm::vec3(viewVector.y, viewVector.z, viewVector.x);
|
||||
glm::vec3 right = glm::vec3(viewVector.z, viewVector.x, viewVector.y);
|
||||
|
||||
glm::vec3 p0 = _particle[p].position - right * _particle[p].radius - up * _particle[p].radius;
|
||||
glm::vec3 p1 = _particle[p].position + right * _particle[p].radius - up * _particle[p].radius;
|
||||
glm::vec3 p2 = _particle[p].position + right * _particle[p].radius + up * _particle[p].radius;
|
||||
glm::vec3 p3 = _particle[p].position - right * _particle[p].radius + up * _particle[p].radius;
|
||||
|
||||
glBegin(GL_TRIANGLES);
|
||||
glVertex3f(p0.x, p0.y, p0.z);
|
||||
glVertex3f(p1.x, p1.y, p1.z);
|
||||
glVertex3f(p2.x, p2.y, p2.z);
|
||||
glEnd();
|
||||
|
||||
glBegin(GL_TRIANGLES);
|
||||
glVertex3f(p0.x, p0.y, p0.z);
|
||||
glVertex3f(p2.x, p2.y, p2.z);
|
||||
glVertex3f(p3.x, p3.y, p3.z);
|
||||
glEnd();
|
||||
}
|
||||
} else {
|
||||
glPushMatrix();
|
||||
glTranslatef(_particle[p].position.x, _particle[p].position.y, _particle[p].position.z);
|
||||
glutSolidSphere(_particle[p].radius, 6, 6);
|
||||
glPopMatrix();
|
||||
|
||||
if (SHOW_VELOCITY_TAILS) {
|
||||
glColor4f( _particle[p].color.x, _particle[p].color.y, _particle[p].color.z, 0.5f);
|
||||
glm::vec3 end = _particle[p].position - _particle[p].velocity * 2.0f;
|
||||
glBegin(GL_LINES);
|
||||
glVertex3f(_particle[p].position.x, _particle[p].position.y, _particle[p].position.z);
|
||||
glVertex3f(end.x, end.y, end.z);
|
||||
glEnd();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -293,7 +399,7 @@ 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;
|
||||
|
||||
|
||||
glLineWidth(2.0f);
|
||||
|
||||
glColor3f(0.8f, 0.4, 0.4);
|
||||
|
|
|
|||
|
|
@ -11,13 +11,18 @@
|
|||
|
||||
#include <glm/gtc/quaternion.hpp>
|
||||
|
||||
const int MAX_PARTICLES = 5000;
|
||||
const int MAX_EMITTERS = 20;
|
||||
const int MAX_PARTICLES = 5000;
|
||||
const int MAX_EMITTERS = 20;
|
||||
const int NUM_PARTICLE_LIFE_STAGES = 4;
|
||||
const bool USE_BILLBOARD_RENDERING = false;
|
||||
const bool SHOW_VELOCITY_TAILS = false;
|
||||
|
||||
class ParticleSystem {
|
||||
public:
|
||||
|
||||
struct ParticleAttributes {
|
||||
float radius;
|
||||
glm::vec4 color;
|
||||
float bounce;
|
||||
float gravity;
|
||||
float airFriction;
|
||||
|
|
@ -34,31 +39,23 @@ public:
|
|||
ParticleSystem();
|
||||
|
||||
int addEmitter(); // add (create) an emitter and get its unique id
|
||||
void emitParticlesNow(int e, int numParticles, float radius, glm::vec4 color, glm::vec3 velocity, float lifespan);
|
||||
void emitParticlesNow(int emitterIndex, int numParticles, float radius, glm::vec4 color, glm::vec3 velocity, float lifespan);
|
||||
void simulate(float deltaTime);
|
||||
void render();
|
||||
void setEmitterBaseParticle(int emitterIndex, bool showing );
|
||||
void setEmitterBaseParticle(int emitterIndex, bool showing, float radius, glm::vec4 color );
|
||||
|
||||
void setParticleAttributesForEmitter(int emitterIndex, ParticleAttributes attributes);
|
||||
void setOrangeBlueColorPalette(); // apply a nice preset color palette to the particles
|
||||
void setUpDirection(glm::vec3 upDirection) {_upDirection = upDirection;} // tell particle system which direction is up
|
||||
|
||||
void setCollisionSphere(int emitterIndex, glm::vec3 position, float radius); // specify a sphere for the particles to collide with
|
||||
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
|
||||
void setShowingEmitter (int emitterIndex, bool showing ) { _emitter[emitterIndex].showingEmitter = showing; } // set its visibiity
|
||||
void setParticleAttributes(int emitterIndex, ParticleAttributes attributes);
|
||||
void setParticleAttributes(int emitterIndex, int lifeStage, ParticleAttributes attributes);
|
||||
void setCollisionSphere (int emitterIndex, glm::vec3 position, float radius); // specify a sphere for the particles to collide with
|
||||
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
|
||||
void setShowingEmitter (int emitterIndex, bool showing ) { _emitter[emitterIndex].visible = showing; } // set its visibiity
|
||||
|
||||
private:
|
||||
|
||||
struct Emitter {
|
||||
glm::vec3 position;
|
||||
glm::quat rotation;
|
||||
glm::vec3 right;
|
||||
glm::vec3 up;
|
||||
glm::vec3 front;
|
||||
bool showingEmitter;
|
||||
ParticleAttributes particleAttributes;
|
||||
};
|
||||
|
||||
struct Particle {
|
||||
bool alive; // is the particle active?
|
||||
glm::vec3 position; // position
|
||||
|
|
@ -70,8 +67,18 @@ private:
|
|||
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;
|
||||
float _timer;
|
||||
Emitter _emitter[MAX_EMITTERS];
|
||||
Particle _particle[MAX_PARTICLES];
|
||||
int _numParticles;
|
||||
|
|
@ -81,7 +88,6 @@ private:
|
|||
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 killParticle(int p);
|
||||
void renderEmitter(int emitterIndex, float size);
|
||||
void renderParticle(int p);
|
||||
|
|
|
|||
Loading…
Reference in a new issue