/// <inheritdoc />
/// <summary>
/// If the action of selecting scene nodes at the scene is active
/// we will draw selecting rectangle.
/// </summary>
public override void Draw(SceneBatch sceneBatch)
{
// If the action of selecting objects at the scene is active
// we will draw selecting rectangle.
if (SelectingNodes)
{
sceneBatch.ApplyBasicEffect();
sceneBatch.GraphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleStrip, drawSelectingRectangle, 0, 2);
}
}
/// <summary>
/// Called when the <see cref="SceneScreen"/> needs to be drawn.
/// </summary>
/// <remarks>
/// Draws in this order:
/// <list type="bullet">
/// <item><description>background</description></item>
/// <item><description>grid, if visible</description></item>
/// <item><description>visible scene nodes</description></item>
/// <item><description>shapes of visible scene nodes, if visible</description></item>
/// <item><description>hands the drawing over to the <see cref="State"/> (<see cref="SceneState.Draw"/> method) of the SceneScreen control</description></item>
/// <item><description>information box at the upper right corner, information about the position under the mouse at the bottom right corner and
/// simulation units measure information at the bottom left corner</description></item>
/// </list>
/// </remarks>
/// <param name="gameTime">Time passed since the last call to Draw.</param>
protected override void Draw(GameTime gameTime)
{
// clear with background color
GraphicsDevice.Clear(ColorSettings.BackgroundColor);
sceneBatch.SceneSize = new Vector2(Width * ScaleInversFactor, Height * ScaleInversFactor);
sceneBatch.ScenePosition = Position;
// draw grid
if (ShowGrid)
{
sceneBatch.Begin(ref projection, ref identity, ref world, ScaleFactor, ScaleInversFactor, ref gameTime);
float gridGapSize = GridGapSize * ScaleInversFactor;
float sceneWidth = Width * ScaleInversFactor;
float sceneHeight = Height * ScaleInversFactor;
for (float i = -Position.Y % gridGapSize; i <= sceneHeight; i += gridGapSize)
{
sceneBatch.DrawLine(new Vector3(Position.X, Position.Y + i, 0f), new Vector3(Position.X + sceneWidth, Position.Y + i, 0f), ColorSettings.GridLineColor);
}
for (float i = -Position.X % gridGapSize; i <= sceneWidth; i += gridGapSize)
{
sceneBatch.DrawLine(new Vector3(Position.X + i, Position.Y, 0f), new Vector3(Position.X + i, Position.Y + sceneHeight, 0f), ColorSettings.GridLineColor);
}
sceneBatch.End();
}
// draw scene (game objects)
sceneBatch.Begin(ref projection, ref identity, ref world, ScaleFactor, ScaleInversFactor, ref gameTime);
foreach (SceneNode node in GetAllSceneNodesReverse(true))
{
node.Draw(sceneBatch);
}
sceneBatch.End();
// draw scene (game objects) shapes
if (ShowShapes)
{
sceneBatch.Begin(ref projection, ref identity, ref world, ScaleFactor, ScaleInversFactor, ref gameTime);
foreach (SceneNode node in GetAllSceneNodesReverse(true))
{
node.DrawShapes(sceneBatch);
}
sceneBatch.End();
}
State.Draw(sceneBatch);
// draw front (like hud)
sceneBatch.Begin(ref projection, ref identity, ref identity, ScaleFactor, ScaleInversFactor, ref gameTime);
// draw info box background and border
sceneBatch.ApplyBasicEffect();
sceneBatch.GraphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleStrip, infoBoxRectangle, 0, 2);
sceneBatch.GraphicsDevice.DrawUserPrimitives(PrimitiveType.LineStrip, infoBoxBorder, 0, 2);
// draw simulation units measure
sceneBatch.GraphicsDevice.DrawUserPrimitives(PrimitiveType.LineList, simulationUnitsLine, 0, 1);
sceneBatch.GraphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleList, simulationUnitsArrows, 0, 2);
// draw rotating update icon
sceneBatch.Apply2D();
sceneBatch.Draw(updateIcon, new Vector2(Width - 90, 18), null, Color.White, (float)lastTime.TotalSeconds * 2f, new Vector2(updateIcon.Width / 2f, updateIcon.Height / 2f), 1f, SpriteEffects.None, 0f);
// draw fps text
sceneBatch.DrawString(font, String.Format("{0,9} FPS", Fps), new Vector2(Width - 80, 10), ColorSettings.InfoBoxTextColor);
// draw mouse scene position in simulation units
sceneBatch.DrawString(font, String.Format("X: {0,-6:0.###}", GameEngine.ConvertUnits.ToSimUnits(MouseScenePosition.X)), new Vector2(Width - 70, Height - 40), ColorSettings.InfoBoxTextColor);
sceneBatch.DrawString(font, String.Format("Y: {0,-6:0.###}", GameEngine.ConvertUnits.ToSimUnits(MouseScenePosition.Y)), new Vector2(Width - 70, Height - 20), ColorSettings.InfoBoxTextColor);
// draw simulation units text
sceneBatch.DrawString(font, "1 meter", new Vector2(10, Height - 30), ColorSettings.InfoBoxTextColor);
sceneBatch.End();
}
