void b2World::DrawParticleSystem(const b2ParticleSystem& system)
{
int32 particleCount = system.GetParticleCount();
if (particleCount)
{
float32 radius = system.GetRadius();
const b2Vec2* positionBuffer = system.GetPositionBuffer();
if (system.m_colorBuffer.data)
{
const b2ParticleColor* colorBuffer = system.GetColorBuffer();
m_debugDraw->DrawParticles(positionBuffer, radius, colorBuffer, particleCount);
}
else
{
m_debugDraw->DrawParticles(positionBuffer, radius, NULL, particleCount);
}
}
}
int32
ConfinementTests::TestLeakCount()
{
for (int32 t = 0; t < NUMBER_OF_STEPS; t++) {
m_world->Step(DELTA_T, 1, 1);
}
int32 bufferIndex = m_particleGroup->GetBufferIndex();
int32 particleCount = m_particleGroup->GetParticleCount();
const b2Vec2 *positionBuffer = m_particleSystem->GetPositionBuffer();
int32 leakCount = 0;
for (int32 i = 0; i < particleCount; i++) {
b2Vec2 p = positionBuffer[bufferIndex + i];
if (std::abs(p.x) > WIDTH || std::abs(p.y) > HEIGHT) {
leakCount++;
}
}
return leakCount;
}
// Create the world, ground body and the particle system.
void BodyContactTests::SetUp()
{
// Define the gravity vector.
const b2Vec2 gravity(0.0f, -10.0f);
// Construct a world object, which will simulate the contacts.
m_world = new b2World(gravity);
// Define the ground body.
b2BodyDef groundBodyDef;
groundBodyDef.position.Set(0.0f, 0.0f);
// Call the body factory which allocates memory for the ground body
// from a pool and creates the ground box shape (also from a pool).
// The body is also added to the world.
m_groundBody = m_world->CreateBody(&groundBodyDef);
// Create the particle system.
const b2ParticleSystemDef particleSystemDef;
m_particleSystem = m_world->CreateParticleSystem(&particleSystemDef);
m_particleDiameter = m_particleSystem->GetRadius() * 2.0f;
}