void initParticle(Particle& out)
{
// Time particle is created relative to the global running
// time of the particle system.
out.initialTime = mTime;
// Flare lives for 2-4 seconds.
out.lifeTime = GetRandomFloat(2.0f, 4.0f);
// Initial size in pixels.
out.initialSize = GetRandomFloat(10.0f, 15.0f);
// Give a very small initial velocity to give the flares
// some randomness.
GetRandomVec(out.initialVelocity);
// Scalar value used in vertex shader as an amplitude factor.
out.mass = GetRandomFloat(1.0f, 2.0f);
// Start color at 50-100% intensity when born for variation.
out.initialColor = GetRandomFloat(0.5f, 1.0f)*WHITE;
// Generate random particle on the ring in polar coordinates:
// random radius and random angle.
float r = GetRandomFloat(10.0f, 14.0f);
float t = GetRandomFloat(0, 2.0f*D3DX_PI);
// Convert to Cartesian coordinates.
out.initialPos.x = r*cosf(t);
out.initialPos.y = r*sinf(t);
// Random depth value in [-1, 1] (depth of the ring)
out.initialPos.z = GetRandomFloat(-1.0f, 1.0f);
}
vgl_vector_3d<double> GetOrthogonalVector(const vgl_vector_3d<double> &V)
{
//Gram Schmidt Orthogonalization
vgl_vector_3d<double> RandVec = GetRandomVec();
vgl_vector_3d<double> N = RandVec - Project(RandVec, V);
normalize(N);
return N;
}
void FireBall::initParticle(ParticleEmitter::Particle& out)
{
// Time particle is created relative to the global running
// time of the particle system.
out.initialTime = mTime;
out.age=mTime;
// Flare lives for 2-4 seconds.
// original values //out.lifeTime = GetRandomFloat(2.0f, 8.0f);
out.lifeTime = GetRandomFloat(mMinLifeTime, mMaxLifeTime);
// Initial size in pixels.
// original values //out.initialSize = GetRandomFloat(10.0f, 15.0f);
out.initialSize = GetRandomFloat(mMinSize, mMaxSize);
// Give a very small initial velocity to give the flares
// some randomness.
GetRandomVec(out.initialVelocity);
out.initialVelocity.x *= mAccelImpulse.x;
out.initialVelocity.y *= mAccelImpulse.y;
out.initialVelocity.z *= mAccelImpulse.z;
out.initialVelocity.x += mAccelShift.x;
out.initialVelocity.y += mAccelShift.y;
out.initialVelocity.z += mAccelShift.z;
// Scalar value used in vertex shader as an amplitude factor.
out.mass = GetRandomFloat(1.0f, 2.0f);
// Start color at 50-100% intensity when born for variation.
out.initialColor = static_cast<DWORD>(GetRandomFloat(0.5f, 1.0f) * 1.0f);//white;
V3 temp = mParticleRadius - mInitPos;
float length = temp.Length();
V3 tempNormal = temp.Normalize();
//D3DXMATRIX outmtx;
noMat3 outmtx;
//D3DXMatrixRotationYawPitchRoll(&outmtx,GetRandomFloat(0.0f,2.0f)*noMath::PI,GetRandomFloat(0.0f,2.0f)*noMath::PI,0.0f);
noAngles angle(RAD2DEG(GetRandomFloat(0.0f,2.0f)*noMath::PI), RAD2DEG(GetRandomFloat(0.0f,2.0f)*noMath::PI), 0.0f);
outmtx = angle.ToMat3();
//D3DXVec3TransformCoord(&temp,&temp,&outmtx);
temp = outmtx * temp;
out.initialPos = mInitPos + (temp * length);
}
