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GPUParticles: Implements SphereEmitter.

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Explosion looks a bit like a geyser of flame, needs tweaking.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14881 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
vincentlj
2014-01-01 21:36:13 +00:00
parent 93643d660f
commit 66ab51789f
2 changed files with 66 additions and 2 deletions
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67
src/graphics/gpuparticles.cpp
View File

@@ -371,6 +371,66 @@ void ParticleSystemProxy::generateParticlesFromBoxEmitter(scene::IParticleBoxEmi
delete[] initialvalue;
}
void ParticleSystemProxy::generateParticlesFromSphereEmitter(scene::IParticleSphereEmitter *emitter)
{
float *particles = new float[COMPONENTCOUNT * count], *initialvalue = new float[COMPONENTCOUNT * count];
unsigned lifetime_range = emitter->getMaxLifeTime() - emitter->getMinLifeTime();
float sizeMin = emitter->getMinStartSize().Height;
float sizeMax = emitter->getMaxStartSize().Height;
for (unsigned i = 0; i < count; i++) {
// Random distance from center
const f32 distance = os::Randomizer::frand() * emitter->getRadius();
// Random direction from center
vector3df pos = emitter->getCenter() + distance;
pos.rotateXYBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
pos.rotateYZBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
pos.rotateXZBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
particles[COMPONENTCOUNT * i] = pos.X;
particles[COMPONENTCOUNT * i + 1] = pos.Y;
particles[COMPONENTCOUNT * i + 2] = pos.Z;
// Initial lifetime is 0 percent
particles[COMPONENTCOUNT * i + 3] = rand();
particles[COMPONENTCOUNT * i + 3] /= RAND_MAX;
initialvalue[COMPONENTCOUNT * i] = particles[COMPONENTCOUNT * i];
initialvalue[COMPONENTCOUNT * i + 1] = particles[COMPONENTCOUNT * i + 1];
initialvalue[COMPONENTCOUNT * i + 2] = particles[COMPONENTCOUNT * i + 2];
initialvalue[COMPONENTCOUNT * i + 3] = (lifetime_range > 0) ? rand() % lifetime_range : 0;
initialvalue[COMPONENTCOUNT * i + 3] += emitter->getMinLifeTime();
core::vector3df particledir = emitter->getDirection();
particledir.rotateXYBy(os::Randomizer::frand() * emitter->getMaxAngleDegrees());
particledir.rotateYZBy(os::Randomizer::frand() * emitter->getMaxAngleDegrees());
particledir.rotateXZBy(os::Randomizer::frand() * emitter->getMaxAngleDegrees());
float size = rand();
size /= RAND_MAX;
size *= (sizeMax - sizeMin);
size += sizeMin;
initialvalue[COMPONENTCOUNT * i + 7] = size;
particles[COMPONENTCOUNT * i + 4] = particledir.X / size;
particles[COMPONENTCOUNT * i + 5] = particledir.Y / size;
particles[COMPONENTCOUNT * i + 6] = particledir.Z / size;
initialvalue[COMPONENTCOUNT * i + 4] = particledir.X / size;
initialvalue[COMPONENTCOUNT * i + 5] = particledir.Y / size;
initialvalue[COMPONENTCOUNT * i + 6] = particledir.Z / size;
}
glBindBuffer(GL_ARRAY_BUFFER, initial_values_buffer);
glBufferData(GL_ARRAY_BUFFER, COMPONENTCOUNT * count * sizeof(float), initialvalue, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_buffers[0]);
glBufferData(GL_ARRAY_BUFFER, COMPONENTCOUNT * count * sizeof(float), particles, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_buffers[1]);
glBufferData(GL_ARRAY_BUFFER, COMPONENTCOUNT * count * sizeof(float), 0, GL_STREAM_DRAW);
delete[] particles;
delete[] initialvalue;
}
GLuint ParticleSystemProxy::SimulationProgram = 0;
GLuint ParticleSystemProxy::RenderProgram = 0;
@@ -404,7 +464,7 @@ void ParticleSystemProxy::setEmitter(scene::IParticleEmitter* emitter)
if (!emitter)
return;
CParticleSystemSceneNode::setEmitter(emitter);
if (emitter->getType() != scene::EPET_POINT && emitter->getType() != scene::EPET_BOX)
if (emitter->getType() != scene::EPET_POINT && emitter->getType() != scene::EPET_BOX && emitter->getType() != scene::EPET_SPHERE)
return;
// Pass a fake material type to force irrlicht to update its internal states on rendering
setMaterialType(irr_driver->getShader(ES_RAIN));
@@ -420,6 +480,9 @@ void ParticleSystemProxy::setEmitter(scene::IParticleEmitter* emitter)
case scene::EPET_BOX:
generateParticlesFromBoxEmitter(static_cast<scene::IParticleBoxEmitter *>(emitter));
break;
case scene::EPET_SPHERE:
generateParticlesFromSphereEmitter(static_cast<scene::IParticleSphereEmitter *>(emitter));
break;
default:
assert(0 && "Wrong particle type");
}
@@ -585,7 +648,7 @@ void ParticleSystemProxy::draw()
}
void ParticleSystemProxy::render() {
if (getEmitter()->getType() != scene::EPET_POINT && getEmitter()->getType() != scene::EPET_BOX)
if (getEmitter()->getType() != scene::EPET_POINT && getEmitter()->getType() != scene::EPET_BOX && getEmitter()->getType() != scene::EPET_SPHERE)
{
CParticleSystemSceneNode::render();
return;

1
src/graphics/gpuparticles.h
View File

@@ -49,6 +49,7 @@ protected:
virtual void draw();
void generateParticlesFromPointEmitter(scene::IParticlePointEmitter *);
void generateParticlesFromBoxEmitter(scene::IParticleBoxEmitter *);
void generateParticlesFromSphereEmitter(scene::IParticleSphereEmitter *);
public:
static IParticleSystemSceneNode *addParticleNode(
bool withDefaultEmitter = true, ISceneNode* parent = 0, s32 id = -1,