public void ZoomIn(float amount)
{
Vector3 newPos = Vector3.Transform(Position, Matrix.CreateTranslation(Fwd * amount));
if (CheckNewPosition(newPos))
{
Position = newPos;
Theta = SetTheta(newPos);
}
}
public void PanDown(float amount)
{
Vector3 newPos = Vector3.Transform(Position, Matrix.CreateTranslation(-Up * amount));
if (CheckNewPosition(newPos))
{
Position = newPos;
Target = Vector3.Transform(Target, Matrix.CreateTranslation(-Up * amount));
Theta = SetTheta(newPos);
}
}
private bool CheckNewPosition(Vector3 newPos)
{
AngularRange3 newTheta = SetTheta(newPos);
return(Math.Abs(newPos.X) <= Math.Abs(Range.Position.Max.X) &&
Math.Abs(newPos.X) >= Math.Abs(Range.Position.Min.X) &&
Math.Abs(newPos.Y) <= Math.Abs(Range.Position.Max.Y) &&
Math.Abs(newPos.Y) >= Math.Abs(Range.Position.Min.Y) &&
Math.Abs(newPos.Z) <= Math.Abs(Range.Position.Max.Z) &&
Math.Abs(newPos.Z) >= Math.Abs(Range.Position.Min.Z) &&
newTheta.Altitude.Max <= Range.Theta.Altitude.Max &&
newTheta.Altitude.Max >= Range.Theta.Altitude.Min &&
newTheta.Azimuth.Max <= Range.Theta.Azimuth.Max &&
newTheta.Azimuth.Max >= Range.Theta.Azimuth.Min);
}
public void PanRight(float amount)
{
Vector3 right = Vector3.Cross(Up, Fwd) * -1;
right.Normalize();
Vector3 newPos = Vector3.Transform(Position, Matrix.CreateTranslation(right * amount));
if (CheckNewPosition(newPos))
{
Position = newPos;
Target = Vector3.Transform(Target, Matrix.CreateTranslation(right * amount));
Theta = SetTheta(newPos);
}
}
public void OrbitVertically(float amount)
{
Vector3 left = Vector3.Cross(Up, Position);
left.Normalize();
Vector3 newPos = Vector3.Transform(Position, Matrix.CreateFromAxisAngle(left, MathHelper.ToRadians(amount)));
if (CheckNewPosition(newPos))
{
Position = newPos;
Up = Vector3.Transform(Up, Matrix.CreateFromAxisAngle(left, MathHelper.ToRadians(amount)));
Fwd = Vector3.Transform(Fwd, Matrix.CreateFromAxisAngle(left, MathHelper.ToRadians(amount)));
Theta = SetTheta(newPos);
}
}
private AngularRange3 SetTheta(Vector3 position)
{
Vector3 norm = position;
norm.Normalize();
float azimuth = 0f;
if (norm.Z > 0)
{
if (norm.X <= 0)
{
azimuth = MathHelper.Pi + (float)Math.Abs(Math.Asin(norm.X)); // quad 3
}
else
{
azimuth = MathHelper.Pi - (float)Math.Abs(Math.Asin(norm.X)); // quad 2
}
}
else if (norm.X < 0 && norm.Z < 0)
{
azimuth = MathHelper.TwoPi - (float)Math.Abs(Math.Asin(norm.X)); // quad 4
}
else
{
azimuth = (float)Math.Abs(Math.Asin(norm.X)); // quad 1
}
var theta = new AngularRange3()
{
Azimuth = new AngularRange()
{
Min = 0f, Max = azimuth
},
Altitude = new AngularRange()
{
Min = 0f, Max = (float)Math.Asin(Vector3.Dot(norm, Vector3.Up))
}
};
return(theta);
}
public void OrbitVertically(float amount)
{
Vector3 left = Vector3.Cross(Up, Position);
left.Normalize();
Vector3 newPos = Vector3.Transform(Position, Matrix.CreateFromAxisAngle(left, MathHelper.ToRadians(amount)));
if (CheckNewPosition(newPos))
{
Position = newPos;
Up = Vector3.Transform(Up, Matrix.CreateFromAxisAngle(left, MathHelper.ToRadians(amount)));
Fwd = Vector3.Transform(Fwd, Matrix.CreateFromAxisAngle(left, MathHelper.ToRadians(amount)));
Theta = SetTheta(newPos);
}
}
private AngularRange3 SetTheta(Vector3 position)
{
Vector3 norm = position;
norm.Normalize();
float azimuth = 0f;
if (norm.Z > 0)
{
if (norm.X <= 0)
azimuth = MathHelper.Pi + (float)Math.Abs(Math.Asin(norm.X)); // quad 3
else
azimuth = MathHelper.Pi - (float)Math.Abs(Math.Asin(norm.X)); // quad 2
}
else if (norm.X < 0 && norm.Z < 0)
azimuth = MathHelper.TwoPi - (float)Math.Abs(Math.Asin(norm.X)); // quad 4
else
azimuth = (float)Math.Abs(Math.Asin(norm.X)); // quad 1
var theta = new AngularRange3()
{
Azimuth = new AngularRange() { Min = 0f, Max = azimuth },
Altitude = new AngularRange() { Min = 0f, Max = (float)Math.Asin(Vector3.Dot(norm, Vector3.Up)) }
};
return theta;
}
public void PanDown(float amount)
{
Vector3 newPos = Vector3.Transform(Position, Matrix.CreateTranslation(-Up * amount));
if (CheckNewPosition(newPos))
{
Position = newPos;
Target = Vector3.Transform(Target, Matrix.CreateTranslation(-Up * amount));
Theta = SetTheta(newPos);
}
}
public void PanRight(float amount)
{
Vector3 right = Vector3.Cross(Up, Fwd) * -1;
right.Normalize();
Vector3 newPos = Vector3.Transform(Position, Matrix.CreateTranslation(right * amount));
if (CheckNewPosition(newPos))
{
Position = newPos;
Target = Vector3.Transform(Target, Matrix.CreateTranslation(right * amount));
Theta = SetTheta(newPos);
}
}
public void ZoomIn(float amount)
{
Vector3 newPos = Vector3.Transform(Position, Matrix.CreateTranslation(Fwd * amount));
if (CheckNewPosition(newPos))
{
Position = newPos;
Theta = SetTheta(newPos);
}
}