Rocket impact prediction

[FinalStateHippi]

simple rocket impact prediction, using debug draw...

idVec3 mAim::GetRocketPredict( void ) 
{
    idVec3 rocketImpact;
    idVec3 rocketVelocity;
    modelTrace_t tracettest;

    //rocket
    idVec3 myBaseVeloc=gameLocal->GetLocalPlayer()->firstPersonViewAxis.ToAngles().ToForward()*2000;
    idVec3 myGraviVec(0,0,-120);

    idVec3 myBaseAcc(0,0,0);
    idVec3 myBaseOrigin=gameLocal->GetLocalPlayer()->firstPersonViewOrigin;
    idVec3 myOrigin=myBaseOrigin;

    float elapsed = 0;
    for(int traceCo=0; traceCo <= 4000; traceCo+=500) {

        elapsed = MS2SEC(traceCo);
        idVec3 acc = myBaseAcc + myGraviVec;

        rocketVelocity        = myBaseVeloc + ( acc * elapsed );
        rocketImpact        = myBaseOrigin + ( myBaseVeloc * elapsed ) + ( 0.5f * acc * Square( elapsed ) );

        gameRenderWorld->Trace(tracettest, myOrigin, rocketImpact, 1, true);

        if(tracettest.fraction >0.1f && tracettest.fraction<1.f){
            gameRenderWorld->DebugCircle(colorBlue,tracettest.point, gameLocal->GetLocalPlayer()->firstPersonViewAxis.ToAngles().ToForward(),40, 20, idgameloc->msec+1,false);
            gameRenderWorld->DebugCircle(colorGreen,tracettest.point, gameLocal->GetLocalPlayer()->firstPersonViewAxis.ToAngles().ToForward(),30, 20, idgameloc->msec+1,true);
        }
    
        if(tracettest.fraction<1.f)
            break;
        myOrigin = rocketImpact;
    }
    return tracettest.point;
} 

... and drawing it top-down in a second cam:

idVec3 m_vecCameraPosition;
idMat3 m_vecCamereAxis;
idVec3 predOrigin(0,0,0);

predOrigin=aimer.GetRocketPredict();

if(predOrigin!=idVec3(0,0,0)) {
    m_vecCameraPosition=predOrigin;
    
    idAngles drawAngle=gameLocal->GetLocalPlayer()->firstPersonViewAxis.ToAngles();
    drawAngle.pitch=90.f;
    m_vecCamereAxis=drawAngle.ToMat3();
    m_vecCameraPosition.z+=500;

    renderView_t renderView;
    memset( &renderView, 0, sizeof( renderView ) );
    renderView.time=gameLocal->time;
    
    renderView.x = 50;
    renderView.y = 100;
    renderView.fov_x = 60;
    renderView.fov_y = 60;
    renderView.width = 100.0f;
    renderView.height = 100.0f;
    renderView.vieworg = m_vecCameraPosition;

    renderView.viewaxis =m_vecCamereAxis;
    gameRenderWorld->RenderScene(&renderView);
} 

- FSH

credits: etqw SDK, GD


edit - screenshots:

[boecke]

Very neato function, well done.

[HungryGod]

nice work, love the kinematic equations

[Deceptor]

Dude you're going on sick!
Thanks for the contributions

[silverfish]

madman