bool PointStarVlist::BeginDrawState (const QVector ¢er, const Vector & velocity, const Vector & torque, bool roll, bool yawpitch, int whichTexture) {
UpdateGraphics();
static bool StarStreaks=XMLSupport::parse_bool(vs_config->getVariable("graphics","star_streaks","false"));
GFXColorMaterial(AMBIENT|DIFFUSE);
bool ret=false;
if (StarStreaks) {
Matrix rollMatrix;
static float velstreakscale= XMLSupport::parse_float (vs_config->getVariable ("graphics","velocity_star_streak_scale","5"));
static float minstreak= XMLSupport::parse_float (vs_config->getVariable ("graphics","velocity_star_streak_min","1"));
static float fov_smoothing=XMLSupport::parse_float(vs_config->getVariable("graphics","warp.fovlink.smoothing",".4"));
float fov_smoot = pow(double(fov_smoothing),GetElapsedTime());
Vector vel (-velocity*velstreakscale);
float speed = vel.Magnitude();
if ((smoothstreak>=minstreak||vel.MagnitudeSquared()>=minstreak*minstreak)&&(speed>1.0e-7)) {
ret=true;
vel*=1./speed;
speed = fov_smoot*speed + (1-fov_smoot)*smoothstreak;
if (speed<minstreak) speed=minstreak;
static float streakcap = XMLSupport::parse_float (vs_config->getVariable ("graphics","velocity_star_streak_max","100"));
if (speed>streakcap) {
speed=streakcap;
}
vel=vel*speed;
smoothstreak=speed;
GFXColorVertex * v = vlist->BeginMutate(0)->colors;
int numvertices = vlist->GetNumVertices();
static float torquestreakscale= XMLSupport::parse_float (vs_config->getVariable ("graphics","torque_star_streak_scale","1"));
for (int j=0; j<numvertices-1; j+=2) {
int i=j;
// if (SlowStarStreaks)
// i=((rand()%numvertices)/2)*2;
Vector vpoint (v[i+1].x,v[i+1].y,v[i+1].z);
Vector recenter =(vpoint-center.Cast());
if (roll) {
RotateAxisAngle(rollMatrix,torque,torque.Magnitude()*torquestreakscale*.003);
vpoint = Transform(rollMatrix,recenter)+center.Cast();
}
v[i].x=vpoint.i-vel.i;
v[i].y=vpoint.j-vel.j;
v[i].z=vpoint.k-vel.k;
// static float NumSlowStarStreaks=XMLSupport::parse_float(vs_config->getVariable("graphics","num_star_streaks",".05"));
// if (SlowStarStreaks&&j<NumSlowStarStreaks*numvertices)
// break;
}
vlist->EndMutate();
}
}
if (ret) {
vlist->LoadDrawState();
vlist->BeginDrawState();
} else {
nonstretchvlist->LoadDrawState();
nonstretchvlist->BeginDrawState();
}
return ret;
}
ibMtx4 ibMtx4::RotateAxisAngle( ibVec4 axis, const f32 angle )
{
return RotateAxisAngle(ibVec3(axis.x, axis.y, axis.z), angle);
}
float3x4 float3x4::RotateAxisAngle(const float3 &axisDirection, float angleRadians, const float3 &pointOnAxis)
{
return float3x4::Translate(pointOnAxis) * RotateAxisAngle(axisDirection, angleRadians) * float3x4::Translate(-pointOnAxis);
}
