?????????????

OGRE??

??Ogre???????????????????
?darkangel01??[??]???????????????????????????????????????????????

???darkangle01????

???????????????????????????

?????????Vector3 v3;???Vector4 v4(v3);

???????????????????????
Camera* cam=mSceneMgr->getCamera(&quotlayerCam");
Matrix4 viewMatrix=cam->getViewMatrix();
Matrix4 projectMatrix=cam->getProjectionMatrix();

???????????
Vector4 temp=viewMatrix*projectMatrix*v4;
?????
Vector3 ScreenPos=Vector3(v4.x/v4.w,v4.y/v4.w,v4.z/v4.w);

?????x,y???????-1,+1?????0?1?????
float x=ScreenPos.x/2+0.5
float y=-ScreenPos.y/2+0.5


1. Vector4 temp=viewMatrix*projectMatrix*v4;???Vector3 ScreenPos=Vector3(v4.x/v4.w,v4.y/v4.w,v4.z/v4.w);??????temp
2. ???temp??????????????

123776

?Ogre????????????????????
???????????? XD


???????? ????????????
?????
Vector4 temp = (projectMatrix*viewMatrix)*v4;
Vector3 ScreenPos = Vector3(temp.x/temp.w,temp.y/temp.w,temp.z/temp.w);
(???]??C?y? ????????e)

?? ?????????
float x=ScreenPos.x/2+0.5
float y=-ScreenPos.y/2+0.5
?2?????????rojectMatrix ?????2???2???
??????????r??????
???????f ???sse???6?

[em20]

juedno2004

1. 
   
2. bool OgreProject(    double objx, double objy, double objz,
   
3.                      const Matrix4& viewMat,
   
4.                      const Matrix4& projMat,
   
5.                      const RenderWindow* rm,
   
6.                      double* winx, double* winy, double* winz)
   
7. {
   
8.         Matrix4 viewMatrix = viewMat;
   
9.         Matrix4 projMatrix = projMat;
   
10. 
    
11.         Vector4 in = Vector4(objx, objy, objz, 1.0);
    
12.         Vector4 out;
    
13. 
    
14.         out = viewMatrix * in;
    
15.         in = projMatrix * out;
    
16. 
    
17.         if(in.w == 0.0) return false;
    
18. 
    
19.         in.x /= in.w;
    
20.         in.y /= in.w;
    
21.         in.z /= in.w;
    
22. 
    
23.         // Map x, y and z to range 0-1
    
24.         in.x = in.x * 0.5 + 0.5;
    
25.         in.y = in.y * 0.5 + 0.5;
    
26.         in.z = in.z * 0.5 + 0.5;
    
27. 
    
28.         // Map x,y to viewport
    
29.         in.x = in.x * rm->getWidth();
    
30.         in.y = (1 - in.y) * rm->getHeight();
    
31. 
    
32.         *winx = in.x;
    
33.         *winy = in.y;
    
34.         *winz = in.z;
    
35. 
    
36.         return true;
    
37. }
    

复制代码

good luck to u  @_@

darkangel01

123776: Re:?????????????

?Ogre????????????????????
???????????? XD


???????? ????..

??????????

????????????

123776

darkangel01: Re: Re:?????????????



??????????

????????????

                Matrix4 viewMatrix = mCamera->getViewMatrix();
                Matrix4 projectMatrix = mCamera->getProjectionMatrix();
                Matrix4 eyeMatrix = (Matrix4(0.5,0,0,0.5, 0,-0.5,0,0.5, 0,0,1,0, 0,0,0,1)*(projectMatrix*viewMatrix));
                Vector4 temp = eyeMatrix*v4;
                Vector3 ScreenPos = Vector3(temp.x/temp.w,temp.y/temp.w,temp.z/temp.w);

Enigmaya

123776: Re: Re: Re:?????????????

Matrix4 viewMatrix = mCamera->getViewMatrix();
Matrix4 projectMatrix = mCamera->getProjectionMatrix();
Matrix4 eyeMatrix = (Matrix4(0.5,0,0,0.5, 0,-0.5,0,0.5, 0,0,1,0, 0,0,0,1)*(projectMatrix*viewMatrix));
Vector4 temp = eyeMatrix*v4;
Vector3 ScreenPos = Vector3(temp.x/temp.w,temp.y/temp.w,temp.z/temp.w);

?????

123776

Enigmaya: Re: Re: Re: Re:?????????????



?????

???1?????? ?????Q!!
MATRIX??????

darkangel01

????????????????

euclid

???123776?!!

Lzg0001

????????????????????????????

??????????????????????????????

?????//??????????????????????????????

1???�??�??????? vecView ??
?camera->getRayToViewport().getDirection()(???????)??

2????????????????????�??�?????????�3D�??????

3?????3D???????????????????????????
?Vector3 vecTarget = posTarget - posCamera?.

4.?????????????????????????????? 3D ???????? PT?????????? 3D ?? PV?

5?? PT ? PV ???????????�????�??????????? vecView ? vecTarget ?????.  ????????????????????? 2D ?????????????????????????????????

6?????????????????????????????????�??�??�??�?????? Vector3.Y ????????????????????????????????????????????????? Y ???????

7??? X ??????? ?????????????????????????????????????????????�?�???�?�???????? vecView?vecTarget ???????????????�??�???????? Y ???????�?�??�?�?
===============================================

???????????????
�? ??????????????? ????????�?

????????????
�??
???
?????????????
?????????
�

==============================
?????????