crosshairs.cs

功能：基于windows mobile 的地图查看器。使用vs2005开发

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;

using Microsoft.WindowsMobile.DirectX;
using Microsoft.WindowsMobile.DirectX.Direct3D;

namespace cfWorldWind
{
	class Crosshairs
	{
		//WorldWindow.drawCrossHairs()
		public Crosshairs()
		{

		}

		private Line crossHairs;
		Vector2[] vertical;
		Vector2[] horizontal;
		VertexBuffer verticalBuffer;
		VertexBuffer horizontalBuffer;
		Material crossMaterial;

		public void InitializeVertex(Device device, Size form, Color col)
		{
			crossMaterial = new Material();
			crossMaterial.Ambient = col;
			crossMaterial.Diffuse = col;

			int crossHairSize = 6; //10 on desktop

			crossHairs = new Line();

			vertical = new Vector2[2];
			horizontal = new Vector2[2];

			int halfWidth = form.Width / 2;
			int halfHeight = form.Height / 2;

			horizontal[0].X = halfWidth - crossHairSize;
			horizontal[0].Y = halfHeight;
			horizontal[1].X = halfWidth + crossHairSize;
			horizontal[1].Y = halfHeight;

			vertical[0].X = halfWidth;
			vertical[0].Y = halfHeight - crossHairSize;
			vertical[1].X = halfWidth;
			vertical[1].Y = halfHeight + crossHairSize;

			verticalBuffer = Line.GetVertexBuffer(device, vertical, col);
			horizontalBuffer = Line.GetVertexBuffer(device, horizontal, col);
		}

		public void RenderVertex(Device device)
		{
			device.Material = crossMaterial;
			device.SetTexture(0, null);
			crossHairs.Draw(device, horizontalBuffer);
			crossHairs.Draw(device, verticalBuffer);
		}

		public void RenderVertex(Device device, Color col)
		{
			device.Material = crossMaterial;
			device.SetTexture(0, null);
			//crossHairs.Begin();
			crossHairs.Draw(device, horizontal, col);
			crossHairs.Draw(device, vertical, col);
			//crossHairs.End();
		}

		public void Dispose()
		{
			if (verticalBuffer != null)
			{
				verticalBuffer.Dispose();
				verticalBuffer = null;
			}
			if (horizontalBuffer != null)
			{
				horizontalBuffer.Dispose();
				horizontalBuffer = null;
			}
		}

		/*
		Pen pen;
		Point[] vertical;
		Point[] horizontal;

		public void Initialize(Size form)
		{
			int crossHairSize = 6; //10 on desktop

			vertical = new Point[2];
			horizontal = new Point[2];

			int halfWidth = form.Width / 2;
			int halfHeight = form.Height / 2;

			horizontal[0].X = halfWidth - crossHairSize;
			horizontal[0].Y = halfHeight;
			horizontal[1].X = halfWidth + crossHairSize;
			horizontal[1].Y = halfHeight;

			vertical[0].X = halfWidth;
			vertical[0].Y = halfHeight - crossHairSize;
			vertical[1].X = halfWidth;
			vertical[1].Y = halfHeight + crossHairSize;

			float penWidth = 1;
			pen = new Pen(Color.GhostWhite, penWidth);
		}

		public void Render(Graphics graphics)
		{
			graphics.DrawLine(pen, vertical[0].X, vertical[0].Y, vertical[1].X, vertical[1].Y);
			graphics.DrawLine(pen, horizontal[0].X, horizontal[0].Y, horizontal[1].X, horizontal[1].Y); 
		}
		*/

	}
}