第一个Shader程序

fx文件：

 1 float4x4 matWorld;

 2 float Time=1.0f;

 3 

 4 struct VS_OUTPUT

 5 {

 6     float4 Pos :POSITION;

 7     float4 Color :COLOR;

 8 };

 9 

10 VS_OUTPUT VS(float4 Pos:POSITION,float4 Color:COLOR)

11 {

12     VS_OUTPUT Out=(VS_OUTPUT)0;

13     float4 pos1=Pos;

14     pos1.y+= cos( Time*2.0f)+5;

15     Out.Pos=mul(pos1,matWorld);

16     Out.Color=Color;

17     return Out;

18 }

19 

20 float4 PS(VS_OUTPUT vsout): COLOR

21 {

22     return vsout.Color;

23 }

24 

25 technique RenderScene

26 {

27     pass P0

28     {

29         CullMode=None;

30         vertexShader=compile vs_1_1 VS();

31         pixelShader=compile ps_2_0 PS();

32     }

33 }

View Code

C#编写的托管代码，基于WW的渲染框架用托管D3D9 调用：

  1 using System;

  2 using System.Collections.Generic;

  3 using System.Linq;

  4 using System.Text;

  5 using WorldWind.Renderable;

  6 using Utility;

  7 using Microsoft.DirectX.Direct3D;

  8 using System.IO;

  9 using Microsoft.DirectX;

 10 using System.Drawing;

 11 using System.Windows.Forms;

 12 

 13 namespace AppScene

 14 {

 15     public class Tri : RenderableObject

 16     {

 17         static Effect m_effect = null;

 18         VertexBuffer vertexBuffer = null;

 19         public Tri(string name)

 20             : base(name)

 21         {

 22         }

 23         public override void Initialize(DrawArgs drawArgs)

 24         {

 25             if (m_effect == null)

 26             {

 27                 string outerrors = "";

 28                 System.Reflection.Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();

 29                 Stream effectStream = assembly.GetManifestResourceStream("AppScene.Tri.fx");

 30                 string pathfx = "Tris.fx";

 31                // string pathfx = " Default_DirectX_Effect.fx";

 32                 //string pathfx = "CreateParamModel.fx";

 33 

 34                 //string pathfx = "flag.fx";

 35                 //m_effect = Effect.FromStream(

 36                 //    drawArgs.device,

 37                 //    effectStream,

 38                 //    null,

 39                 //    null,

 40                 //    ShaderFlags.None,

 41                 //    null,

 42                 //    out outerrors);

 43                 m_effect = Effect.FromFile(

 44                     drawArgs.device,

 45                     pathfx,

 46                     null,

 47                     null,

 48                     ShaderFlags.None,

 49                     null,

 50                     out outerrors);

 51                 if (outerrors != null && outerrors.Length > 0)

 52                     Log.Write(Log.Levels.Error, outerrors);

 53             }

 54             vertexBuffer = new VertexBuffer(typeof(CustomVertex.PositionColored), 3, drawArgs.device, 0, CustomVertex.PositionColored.Format, Pool.Default);

 55             vertexBuffer.Created += new EventHandler(vertexBuffer_Created);

 56             vertexBuffer_Created(vertexBuffer, null);

 57             Matrix WorldMatrix = Matrix.Identity;

 58             Matrix viewMatrix = Matrix.LookAtLH(new Vector3(0.0f, 3.0f, -9.0f), new Vector3(0.0f, 0.0f, 0.0f), new Vector3(0.0f, 1.0f, 0.0f));

 59             Matrix projMatrix = Matrix.PerspectiveFovLH((float)Math.PI / 4, 1.0f, 1.0f, 100.0f);

 60             WorldMatrix = drawArgs.device.GetTransform(TransformType.World);

 61             viewMatrix = drawArgs.device.GetTransform(TransformType.View);

 62             projMatrix = drawArgs.device.GetTransform(TransformType.Projection);

 63             

 64             m_effect.SetValue("matWorld", WorldMatrix * viewMatrix * projMatrix);

 65            // m_effect.SetValue("matViewProjection", viewMatrix * projMatrix); 

 66             isInitialized = true;

 67         }

 68 

 69         public override void Update(DrawArgs drawArgs)

 70         {

 71             try

 72             {

 73                 if (!isInitialized)

 74                     Initialize(drawArgs);

 75                 

 76             }

 77             catch (Exception ex)

 78             {

 79                 Log.Write(ex);

 80             }

 81         }

 82         public override void Render(DrawArgs drawArgs)

 83         {

 84             if (!isInitialized)

 85                 return;

 86 

 87             drawArgs.device.SetStreamSource(0, vertexBuffer, 0);

 88             drawArgs.device.VertexFormat = CustomVertex.PositionColored.Format;

 89             int iTime = Environment.TickCount % 1000;

 90             float Angle = iTime * (2.0f * (float)Math.PI) / 1000.0f;

 91             m_effect.SetValue("Time", Angle);

 92             m_effect.Technique = "RenderScene";

 93            // m_effect.Technique = "Default_DirectX_Effect";

 94             int numPasses = m_effect.Begin(0);

 95         

 96             for (int i = 0; i < numPasses; i++)

 97             {

 98                 m_effect.BeginPass(i);

 99                 drawArgs.device.DrawPrimitives(  PrimitiveType.TriangleList, 0,1 );

100                 m_effect.EndPass();

101             }

102             m_effect.End();

103 

104         }

105 

106         void vertexBuffer_Created(object sender, EventArgs e)

107         {

108             CustomVertex.PositionColored[] verts = (CustomVertex.PositionColored[])vertexBuffer.Lock(0, 0);

109             verts[0].Position = new Vector3(12.0f,11.0f,10.0f);

110             verts[0].Color = Color.Red.ToArgb();

111             verts[1].Position = new Vector3(30.0f, 32.0f, 10.0f);

112             verts[1].Color = Color.Red.ToArgb();

113             verts[2].Position = new Vector3(10.0f, 60.0f, 10.0f);

114             verts[2].Color = Color.Yellow.ToArgb();

115             vertexBuffer.Unlock();

116         }

117 

118         public override void Dispose()

119         {

120             if (vertexBuffer!=null)

121             {

122                 vertexBuffer.Dispose();

123             }

124         }

125 

126         public override bool PerformSelectionAction(DrawArgs drawArgs)

127         {

128             return false;

129         }

130     }

131 }

View Code

这里出现一个问题：

鼠标在窗体上移动才能够显示上下移动的三角形。

有时候启动了程序，三角形干脆不显示。开始还没有这个问题，后来出现这个问题！

原来我以为是视域体的问题，但是这个三角形肯定在视域体内部啊。

是帧率控制的问题？需要控制帧率吗，控制帧率是为了减少屏幕刷新次数。不至于刷新太频繁画面干脆不显示吧！

机器有没有问题？

这个问题真是困扰人！

WW的渲染框架本身会有问题吗，通过继承构建的渲染列表对状态机产生影响了？书上的示例程序是没有问题的，为啥我写到一个RenderObject中会出现问题？

后记：移植了NativeMethod类后就好了，应该是消息分发的问题。