原创D3D几何实例化的DEMO

CUBE的几何实例化DEMO

鼠标右键按下并拖动         旋转视角
WSAD                         前后左右
RF                              上下
QE                              左右旋转
上下左右键                   上下左右旋转

-                                减少立方体
=                               增加立方体

shader代码:

 //--------------------------------------------------------------------------------------
 // Global variables
 //--------------------------------------------------------------------------------------

 float4x4 g_mWorld    : WORLD            : register(c0); // World matrix for object
 float4x4 g_mView    : VIEW            : register(c4);    // View matrix for object
 float4x4 g_mProj    : PROJECTION    : register(c8);    // Project matrix for object
 float4   g_params   : PARAMS        : register(c12); 

 //-----------------------------------------------------------------------------
 // Name: VS_HWInstancing
 // Type: Vertex shader (HW Instancing)
 //-----------------------------------------------------------------------------
 void VS_HWInstancing(
     float4 vPos : POSITION,
     float3 vNormal : NORMAL,
     float4 vColor : COLOR0,
     float4 vColorInstance : COLOR1,
     float4 vBoxInstance : COLOR2,
     out float4 oPos : POSITION,
     out float4 oColor : COLOR0)
 {
     // Use the fourth component of the vBoxInstance to rotate the box:
     vBoxInstance.w *=  * 3.1415f;
     float4 vRotatedPos = vPos;
     vRotatedPos.x = vPos.x * cos(vBoxInstance.w) + vPos.z * sin(vBoxInstance.w);
     vRotatedPos.z = vPos.z * cos(vBoxInstance.w) - vPos.x * sin(vBoxInstance.w);

     // Use the instance position to offset the incoming box corner position:
     vRotatedPos += float4( (vBoxInstance.xyz) * g_params.x,  );
     vRotatedPos.x -= g_params.y;
     vRotatedPos.z -= g_params.y;
     vRotatedPos.w = 1.0f;

     // Transform the position from object space to homogeneous projection space
     oPos = mul( vRotatedPos, g_mWorld );
     oPos = mul( oPos, g_mView );
     oPos = mul( oPos, g_mProj );

     // color
     oColor = vColor * vColorInstance;
 }

 //-----------------------------------------------------------------------------
 // Name: PS
 // Type: Pixel shader
 //-----------------------------------------------------------------------------
 float4 PS(    float4 vColor : COLOR0 ) : COLOR0
 {
     return vColor;
 }

 //-----------------------------------------------------------------------------
 // Name: THW_Instancing
 // Type: Technique
 // Desc: Renders scene through Hardware instancing
 //-----------------------------------------------------------------------------
 technique THW_Instancing
 {
     pass P0
     {
         VertexShader = compile vs_2_0 VS_HWInstancing();
         PixelShader  = compile ps_2_0 PS();
     }
 }

下载地址:

http://pan.baidu.com/s/1wz8jH