protected Matrix4 straightMissileSpawnTxfm(ISSpaceMissileTarget target,
Vector3 launcherPos, Vector3 launcherVel,
int id, int clusterSize)
{
const float sideDispersal = 2f;
float angle = (float)Math.PI * 2f / (float)clusterSize * id;
Vector3 toTarget = (target.position - launcherPos);
float length = toTarget.Length;
if (length < 0.0001f)
{
toTarget = -Vector3.UnitZ;
}
else
{
// normalize
toTarget /= length;
}
Quaternion orientQuat = OpenTKHelper.neededRotationQuat(Vector3.UnitZ, toTarget);
Matrix4 orientMat = Matrix4.CreateFromQuaternion(orientQuat);
Matrix4 disperalMat = Matrix4.CreateTranslation(sideDispersal * (float)Math.Cos(angle),
sideDispersal * (float)Math.Sin(angle), 0f);
return(disperalMat * orientMat * Matrix4.CreateTranslation(launcherPos) * Matrix4.CreateTranslation(toTarget * 7f));
}
protected void moveShips(float timeElapsed)
{
if (timeElapsed <= 0f)
{
return;
}
// make the target drone move from side to side
localTime += timeElapsed;
//localTime += timeElapsed * 0.3f;
Vector3 pos = targetDrone.Pos;
pos.Z = 30f * (float)Math.Sin(localTime);
targetDrone.Pos = pos;
// make the vandal ship orbit missile target
Vector3 desiredPos;
Vector3 desiredDir;
float angle = localTime * 0.5f;
//float angle = localTime * 0.01f;
#if true
float desiredXOffset = 100f * (float)Math.Cos(angle);
float desiredYOffset = 20f * (float)Math.Sin(angle * 0.77f);
float desiredZOffset = 80f * (float)Math.Sin(angle * 0.88f);
#else
float desiredXOffset = 100f * (float)Math.Cos(angle);
float desiredYOffset = 100f * (float)Math.Sin(angle);
float desiredZOffset = 0f;
#endif
Vector3 desiredOffset = new Vector3(desiredXOffset, desiredYOffset, desiredZOffset);
var target = getTargetObject();
if (missileLauncher != MissileLaunchers.VandalShip || target == null || target == vandalShip)
{
desiredPos = new Vector3(100f, 0f, 0f);
desiredDir = -Vector3.UnitX;
}
else if (target == main3dScene.ActiveCamera)
{
desiredPos = main3dScene.ActiveCamera.Pos + -main3dScene.ActiveCamera.Dir * 300f;
Quaternion cameraOrient = OpenTKHelper.neededRotationQuat(Vector3.UnitZ, -main3dScene.ActiveCamera.Up);
desiredPos += Vector3.Transform(desiredOffset * 0.1f, cameraOrient);
desiredDir = (target.Pos - vandalShip.Pos).Normalized();
}
else
{
//float desiredZOffset = 5f * (float)Math.Sin(angle + 0.2f);
desiredPos = target.Pos + desiredOffset;
desiredDir = (target.Pos - vandalShip.Pos).Normalized();
}
Vector3 desiredMotion = desiredPos - vandalShip.Pos;
const float vel = 100f;
float displacement = vel * timeElapsed;
Vector3 vandalNewPos;
if (displacement > desiredMotion.LengthFast)
{
vandalNewPos = desiredPos;
}
else
{
vandalNewPos = vandalShip.Pos + desiredMotion.Normalized() * displacement;
}
vandalVelocity = (vandalNewPos - vandalShip.Pos) / timeElapsed;
vandalShip.Pos = vandalNewPos;
Quaternion vandalOrient = OpenTKHelper.neededRotationQuat(Vector3.UnitZ, desiredDir);
vandalShip.Orient(desiredDir, Vector3.Transform(Vector3.UnitY, vandalOrient));
}
