void DiracAntiSpinor::SetP4(const Vector4<double> &__p4,
const double &__mass){
Matrix <complex<double> > sigP(2,2);
Matrix <complex<double> > chi(2,1);
PauliSigma sigma;
_p4 = __p4;
_mass = __mass;
complex<double> norm = sqrt(__p4.E() + __mass);
complex<double> epm = __p4.E() + __mass;
sigP = sigma[1]*__p4.X() + sigma[2]*__p4.Y() + sigma[3]*__p4.Z();
// spin up
chi(0,0) = 0.;
chi(1,0) = 1.;
_spinors[1](2,0) = chi(0,0)*norm;
_spinors[1](3,0) = chi(1,0)*norm;
_spinors[1](0,0) = ((sigP*chi)(0,0))*norm/epm;
_spinors[1](1,0) = ((sigP*chi)(1,0))*norm/epm;
// spin down
chi(0,0) = 1.;
chi(1,0) = 0.;
_spinors[0](2,0) = chi(0,0)*norm;
_spinors[0](3,0) = chi(1,0)*norm;
_spinors[0](0,0) = ((sigP*chi)(0,0))*norm/epm;
_spinors[0](1,0) = ((sigP*chi)(1,0))*norm/epm;
this->_SetProjector();
}
Point4::type Point4::DotProduct(Vector4 const& v) const
{
return (m_elements[0] * v.X())
+ (m_elements[1] * v.Y())
+ (m_elements[2] * v.Z())
+ (m_elements[3] * v.W());
}
void Shader::SetVector4(std::string name, Vector4 value)
{
int uloc = SIG_FindUniform(name);
if (uloc != -1) {
glUniform4fARB(uloc, value.X(), value.Y(), value.Z(), value.W());
} else {
SIG_LOG("Could not find uniform \"" << name << "\"");
}
}
void LightRenderNode::renderInternal() {
Quaternion* orientation;
Vector3 unitVector;
Vector3 rotated;
Vector4 vLightPosition;
Vector4 vLightDirection;
Vector3* pos;
GLuint lightNum = GL_LIGHT0 + getAndIncLightNumber();
switch(lightType) {
case LIGHT_DIRECTIONAL:
orientation = owner->getTransform()->getOrientation();
unitVector = Vector3(0.0f,0.0f,1.0f);
rotated = orientation->Rotate(unitVector);
vLightDirection.X() = -rotated.X();
vLightDirection.Y() = -rotated.Y();
vLightDirection.Z() = -rotated.Z();
vLightDirection.W() = 0.0f;
glEnable(lightNum);
glLightfv(lightNum, GL_POSITION, (float*)&vLightDirection);
break;
case LIGHT_POINT:
pos = owner->getTransform()->getPosition();
vLightPosition.X() = pos->X();
vLightPosition.Y() = pos->Y();
vLightPosition.Z() = pos->Z();
vLightPosition.W() = 1.0f;
glEnable(lightNum);
glLightfv(lightNum, GL_POSITION, (float*)&vLightPosition);
break;
case LIGHT_SPOT:
pos = owner->getTransform()->getPosition();
orientation = owner->getTransform()->getOrientation();
unitVector = Vector3(0.0f,0.0f,1.0f);
rotated = orientation->Rotate(unitVector);
vLightPosition.X() = pos->X();
vLightPosition.Y() = pos->Y();
vLightPosition.Z() = pos->Z();
vLightPosition.W() = 1.0f;
orientation = owner->getTransform()->getOrientation();
unitVector = Vector3(0.0f,0.0f,1.0f);
rotated = orientation->Rotate(unitVector);
vLightDirection.X() = rotated.X();
vLightDirection.Y() = rotated.Y();
vLightDirection.Z() = rotated.Z();
vLightDirection.W() = 0.0f;
glEnable(lightNum);
glLightf(lightNum, GL_SPOT_CUTOFF, 45.0);
glLightfv(lightNum, GL_POSITION, (float*)&vLightPosition);
glLightfv(lightNum, GL_SPOT_DIRECTION, (float*)&vLightDirection);
break;
}
glLightfv(lightNum, GL_AMBIENT, (float*)&ambient);
glLightfv(lightNum, GL_DIFFUSE, (float*)&diffuse);
glLightfv(lightNum, GL_SPECULAR, (float*)&specular);
}
Quaternion::Quaternion(Vector4 const& vector, float angle)
: m_elements { Cos(angle / 2.0f), vector.X() * Sin(angle / 2.0f), vector.Y() * Sin(angle / 2.0f),
vector.Z() * Sin(angle / 2.0f) }
{
}