private void InitializeCamera()
{
float aspectRatio = (float)GraphicsDevice.Viewport.Width / (float)GraphicsDevice.Viewport.Height;
float fov = MathHelper.PiOver4 * aspectRatio * 3 / 4;
projection = Matrix.CreatePerspectiveFieldOfView(fov, aspectRatio, .1f, 2000f);
world = Matrix.Identity;
camera = new ArcBallCamera(ArcBallCameraMode.RollConstrained);
camera.Distance = 450;
//orbit the camera so we're looking down the z=-1 axis
//the acr-ball camera is traditionally oriented to look
//at the "front" of an object
camera.OrbitRight(MathHelper.Pi);
camera.OrbitUp(1.0f);
camera.InputDistanceRate = 100;
}
public void Draw(GraphicsDevice graphics, ArcBallCamera camera, Matrix projection)
{
// Set the parameters of the effect
skySphereEffect.Parameters["ViewMatrix"].SetValue(camera.ViewMatrix);
skySphereEffect.Parameters["ProjectionMatrix"].SetValue(projection);
foreach (ModelMesh mesh in skySphere.Meshes)
{
foreach (ModelMeshPart part in mesh.MeshParts)
{
part.Effect = skySphereEffect;
}
}
// Draw model
foreach (ModelMesh mesh in skySphere.Meshes)
{
mesh.Draw();
}
// Undo the renderstate settings from the shader
graphics.RasterizerState = RasterizerState.CullCounterClockwise;
graphics.DepthStencilState = DepthStencilState.Default;
}
public void DrawrobotNames(SpriteBatch spriteBatch, WorldObjectRobot robot, GraphicsDevice graphicsDevice, ArcBallCamera camera, Matrix projection)
{
GameObjectRobot gameObjectRobot = (GameObjectRobot)robot.GameObject;
Vector3 screenSpace = graphicsDevice.Viewport.Project(Vector3.Zero,
projection,
camera.ViewMatrix,
Matrix.CreateTranslation(robot.PositionX, robot.PositionY, robot.PositionZ));
// Get 2D coordinates from screenspace vector
Vector2 textPosition;
textPosition.X = screenSpace.X;
textPosition.Y = screenSpace.Y;
// Center the text
Vector2 stringCenter = FontSmall.MeasureString(gameObjectRobot.FullName) * 0.5f;
// Calculate position
textPosition.X = (int)(textPosition.X - stringCenter.X);
//textPosition.Y = (int)(textPosition.Y - stringCenter.Y);
textPosition.Y = (int)(textPosition.Y + stringCenter.Y);
// Skip if out of screen
if (textPosition.X < 0 || textPosition.X > graphicsDevice.Viewport.Width)
{
return;
}
if (textPosition.Y < 0 || textPosition.Y > graphicsDevice.Viewport.Height)
{
return;
}
// Draw the text
spriteBatch.DrawString(FontSmall, gameObjectRobot.FullName, textPosition, Color.White);
}
