private static void BounceSphereInWorld(IMovable3 s, GameTime gameTime)
{
// vy = ay * dt + v0;
Vector3 velocity = s.Velocity;
Vector3 position = s.Position;
if (velocity.Y > 0)
{
velocity.Y = velocity.Y - (float)(2f * 9.8f * gameTime.ElapsedGameTime.TotalSeconds);
}
// First test along the X axis, flipping the velocity if a collision occurs.
if (s.Position.X < -worldSize + s.Radius)
{
position.X = -worldSize + s.Radius;
if (s.Velocity.X < 0f)
{
velocity.X *= -1f;
}
}
else if (s.Position.X > worldSize - s.Radius)
{
position.X = worldSize - s.Radius;
if (s.Velocity.X > 0f)
{
velocity.X *= -1f;
}
}
// Then we test the Y axis
if (s.Position.Y < s.Radius)
{
position.Y = s.Radius;
if (s.Velocity.Y < 0f)
{
velocity.Y *= -1f;
}
}
else if (s.Position.Y > worldSize - s.Radius)
{
position.Y = worldSize - s.Radius;
if (s.Velocity.Y > 0f)
{
velocity.Y *= -1f;
}
}
// And lastly the Z axis
if (s.Position.Z < -worldSize + s.Radius)
{
position.Z = -worldSize + s.Radius;
if (s.Velocity.Z < 0f)
{
velocity.Z *= -1f;
}
}
else if (s.Position.Z > worldSize - s.Radius)
{
position.Z = worldSize - s.Radius;
if (s.Velocity.Z > 0f)
{
velocity.Z *= -1f;
}
}
s.Position = position;
s.Velocity = velocity;
s.Rotation = new Vector3(0, PI2 * (float)(gameTime.TotalGameTime.TotalSeconds % 1), 0);
}
private static void BounceSphereInWorld(IMovable3 s, GameTime gameTime)
{
// vy = ay * dt + v0;
Vector3 velocity = s.Velocity;
Vector3 position = s.Position;
if (velocity.Y > 0)
velocity.Y = velocity.Y - (float)(2f * 9.8f * gameTime.ElapsedGameTime.TotalSeconds);
// First test along the X axis, flipping the velocity if a collision occurs.
if (s.Position.X < -worldSize + s.Radius)
{
position.X = -worldSize + s.Radius;
if (s.Velocity.X < 0f)
velocity.X *= -1f;
}
else if (s.Position.X > worldSize - s.Radius)
{
position.X = worldSize - s.Radius;
if (s.Velocity.X > 0f)
velocity.X *= -1f;
}
// Then we test the Y axis
if (s.Position.Y < s.Radius)
{
position.Y = s.Radius;
if (s.Velocity.Y < 0f)
velocity.Y *= -1f;
}
else if (s.Position.Y > worldSize - s.Radius)
{
position.Y = worldSize - s.Radius;
if (s.Velocity.Y > 0f)
velocity.Y *= -1f;
}
// And lastly the Z axis
if (s.Position.Z < -worldSize + s.Radius)
{
position.Z = -worldSize + s.Radius;
if (s.Velocity.Z < 0f)
velocity.Z *= -1f;
}
else if (s.Position.Z > worldSize - s.Radius)
{
position.Z = worldSize - s.Radius;
if (s.Velocity.Z > 0f)
velocity.Z *= -1f;
}
s.Position = position;
s.Velocity = velocity;
s.Rotation = new Vector3(0, PI2 * (float)(gameTime.TotalGameTime.TotalSeconds % 1), 0);
}
