/// <summary>
/// Performs Draw events for all objects.
/// </summary>
public static void Update(GameTime gameTime)
{
#region Canvas matrix.
var windowManager = GameMgr.WindowManager;
if (!windowManager.IsFullScreen || windowManager.CanvasMode == CanvasMode.None)
{
CanvasMatrix = Matrix.CreateTranslation(Vector3.Zero);
}
if (windowManager.IsFullScreen)
{
// Fills the display with canvas.
if (windowManager.CanvasMode == CanvasMode.Fill)
{
CanvasMatrix = Matrix.CreateScale(
new Vector3(
windowManager.PreferredBackBufferWidth / (float)windowManager.CanvasWidth,
windowManager.PreferredBackBufferHeight / (float)windowManager.CanvasHeight,
1
)
);
}
// Fills the display with canvas.
// Scales display to match canvas, but keeps aspect ratio.
if (windowManager.CanvasMode == CanvasMode.KeepAspectRatio)
{
var backbufferSize = new Vector2(
windowManager.PreferredBackBufferWidth,
windowManager.PreferredBackBufferHeight
);
float ratio,
offsetX = 0,
offsetY = 0;
float backbufferRatio = windowManager.PreferredBackBufferWidth / (float)windowManager.PreferredBackBufferHeight;
float canvasRatio = windowManager.CanvasWidth / (float)windowManager.CanvasHeight;
if (canvasRatio > backbufferRatio)
{
ratio = windowManager.PreferredBackBufferWidth / (float)windowManager.CanvasWidth;
offsetY = (windowManager.PreferredBackBufferHeight - (windowManager.CanvasHeight * ratio)) / 2f;
}
else
{
ratio = windowManager.PreferredBackBufferHeight / (float)windowManager.CanvasHeight;
offsetX = (windowManager.PreferredBackBufferWidth - (windowManager.CanvasWidth * ratio)) / 2f;
}
CanvasMatrix = Matrix.CreateScale(new Vector3(ratio, ratio, 1)) * Matrix.CreateTranslation(new Vector3(offsetX, offsetY, 0));
}
// Scales display to match canvas, but keeps aspect ratio.
}
#endregion Canvas matrix.
#region Main draw events.
foreach (var camera in CameraMgr.Cameras)
{
if (camera.Enabled)
{
CurrentCamera = camera;
Surface.SetTarget(
camera.Surface,
camera.ConstructViewMatrix(),
camera.ConstructProjectionMatrix()
);
if (camera.ClearBackground)
{
Device.Clear(camera.BackgroundColor);
}
SceneMgr.CallDrawEvents();
VertexBatch.FlushBatch();
Surface.ResetTarget();
}
}
#endregion Main draw events.
// Resetting camera, transform matrix and mouse position.
CurrentCamera = null;
VertexBatch.PushProjectionMatrix(
Matrix.CreateOrthographicOffCenter(
0,
GameMgr.WindowManager.PreferredBackBufferWidth,
GameMgr.WindowManager.PreferredBackBufferHeight,
0,
0,
1
)
);
VertexBatch.PushViewMatrix(CanvasMatrix);
// Resetting camera, transform matrix and mouse position
// Drawing camera surfaces.
var oldEffect = VertexBatch.Effect;
VertexBatch.Effect = null;
Device.Clear(Color.Transparent);
// We don't need in-game rasterizer to apply to camera surfaces.
var oldRasterizerState = VertexBatch.RasterizerState;
var oldBlendState = VertexBatch.BlendState;
VertexBatch.RasterizerState = _cameraRasterizerState;
VertexBatch.BlendState = BlendState.AlphaBlend;
foreach (var camera in CameraMgr.Cameras)
{
if (camera.Visible && camera.Enabled)
{
camera.Render();
}
}
VertexBatch.FlushBatch();
VertexBatch.RasterizerState = oldRasterizerState;
VertexBatch.BlendState = oldBlendState;
VertexBatch.Effect = oldEffect;
// Drawing camera surfaces.
// Drawing GUI stuff.
SceneMgr.CallDrawGUIEvents();
VertexBatch.FlushBatch();
// Drawing GUI stuff.
VertexBatch.PopViewMatrix();
VertexBatch.PopProjectionMatrix();
// Safety checks.
if (!Surface.SurfaceStackEmpty)
{
throw new InvalidOperationException("Unbalanced surface stack! Did you forgot to reset a surface somewhere?");
}
if (!VertexBatch.WorldStackEmpty)
{
throw new InvalidOperationException("Unbalanced World matrix stack! Did you forgot to pop a matrix somewhere?");
}
if (!VertexBatch.ViewStackEmpty)
{
throw new InvalidOperationException("Unbalanced View matrix stack! Did you forgot to pop a matrix somewhere?");
}
if (!VertexBatch.ProjectionStackEmpty)
{
throw new InvalidOperationException("Unbalanced Projection matrix stack! Did you forgot to pop a matrix somewhere?");
}
// Safety checks.
}
