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:

 1 //--------------------------------------------------------------------------------------
 2 // Global variables
 3 //--------------------------------------------------------------------------------------
 4 
 5 float4x4 g_mWorld    : WORLD            : register(c0); // World matrix for object
 6 float4x4 g_mView    : VIEW            : register(c4);    // View matrix for object
 7 float4x4 g_mProj    : PROJECTION    : register(c8);    // Project matrix for object
 8 float4   g_params   : PARAMS        : register(c12); 
 9 
10 //-----------------------------------------------------------------------------
11 // Name: VS_HWInstancing
12 // Type: Vertex shader (HW Instancing)
13 //-----------------------------------------------------------------------------
14 void VS_HWInstancing( 
15     float4 vPos : POSITION,
16     float3 vNormal : NORMAL,
17     float4 vColor : COLOR0,
18     float4 vColorInstance : COLOR1,
19     float4 vBoxInstance : COLOR2,
20     out float4 oPos : POSITION,
21     out float4 oColor : COLOR0)
22 {
23     // Use the fourth component of the vBoxInstance to rotate the box:
24     vBoxInstance.w *= 2 * 3.1415f;
25     float4 vRotatedPos = vPos;
26     vRotatedPos.x = vPos.x * cos(vBoxInstance.w) + vPos.z * sin(vBoxInstance.w);
27     vRotatedPos.z = vPos.z * cos(vBoxInstance.w) - vPos.x * sin(vBoxInstance.w);
28     
29     // Use the instance position to offset the incoming box corner position:
30     vRotatedPos += float4( (vBoxInstance.xyz) * g_params.x, 0 );
31     vRotatedPos.x -= g_params.y;
32     vRotatedPos.z -= g_params.y;
33     vRotatedPos.w = 1.0f;
34 
35     // Transform the position from object space to homogeneous projection space
36     oPos = mul( vRotatedPos, g_mWorld );
37     oPos = mul( oPos, g_mView );
38     oPos = mul( oPos, g_mProj );
39     
40     // color
41     oColor = vColor * vColorInstance;
42 }
43 
44 //-----------------------------------------------------------------------------
45 // Name: PS
46 // Type: Pixel shader
47 //-----------------------------------------------------------------------------
48 float4 PS(    float4 vColor : COLOR0 ) : COLOR0
49 {
50     return vColor;
51 }
52 
53 //-----------------------------------------------------------------------------
54 // Name: THW_Instancing
55 // Type: Technique
56 // Desc: Renders scene through Hardware instancing
57 //-----------------------------------------------------------------------------
58 technique THW_Instancing
59 {
60     pass P0
61     {
62         VertexShader = compile vs_2_0 VS_HWInstancing();
63         PixelShader  = compile ps_2_0 PS();
64     }
65 }

下载地址:

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