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 *= 2 * 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, 0 );
    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