Difference between revisions of "Other Problems"

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(Created page with "==Compile glui in windows== download: <br> http://glui.sourceforge.net/#download <br> Go to msvc folder and build. A problem you may met:<br> "There is an incompatibility betwee...")
 
 
(5 intermediate revisions by the same user not shown)
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To fix the error, right click on the project name in the Solution Explorer tab and select Properties -> C/C++ -> Preprocessor -> Preprocessor definitions and append GLUT_BUILDING_LIB to the existing definitions, seperated by semicolons. " <br>
 
To fix the error, right click on the project name in the Solution Explorer tab and select Properties -> C/C++ -> Preprocessor -> Preprocessor definitions and append GLUT_BUILDING_LIB to the existing definitions, seperated by semicolons. " <br>
 +
==Calculate 3D projection 在三维空间中,点到平面的投影==
 +
 +
空间点Po(X,Y,Z),以及空间平面(Pp, Np) 其中Pp是平面上任意一点,Np是平面的单位法向量,那么 Po在平面(Pp,Np)上的投影点坐标P = Po - Np * ((Po-Pp)*Np)
 +
理由就是Po到平面的距离就是D=((Po-Pp)*Np),把Po沿着法向量的反方向移动D就可以了
 +
 +
MatLab Code
 +
<pre>
 +
Po=[5.116,3.769,0.851];
 +
Pa=[3.351,1.419,-1.669];
 +
Pb=[-1.249,2.196,0.851];
 +
Pc=[2.646,0.2,4.054];
 +
Np = cross((Pa-Pb),(Pc-Pb));
 +
Np = Np / norm(Np);
 +
P = Po - Np * ((Po-Pb) * Np');
 +
//P =
 +
//
 +
//    4.1833    0.7237    0.0875
 +
</pre>
 +
==3D Transformation matrix math==
 +
===Local mat to world Mat===
 +
WorldMat = LocalMat * ParentWorldMat<br>
 +
All Matrixes are 4x4
 +
===Local Translation to World Translation===
 +
WorldVec = LocalVec * ParentWorldMat<br>
 +
 +
==How To Fix Windows 8/Windows 10 touchscreen stopped working==
 +
 +
See this link [[How To Fix Windows Touch Screen]]

Latest revision as of 15:38, 31 October 2015

Compile glui in windows

download:
http://glui.sourceforge.net/#download
Go to msvc folder and build. A problem you may met:

"There is an incompatibility between glut.h and Visual Studio .NET. that results in compile errors: error C2381: 'exit' : redefinition; __declspec(noreturn) differs error C3861: 'exit': identifier not found, even with argument-dependent lookup

To fix the error, right click on the project name in the Solution Explorer tab and select Properties -> C/C++ -> Preprocessor -> Preprocessor definitions and append GLUT_BUILDING_LIB to the existing definitions, seperated by semicolons. "

Calculate 3D projection 在三维空间中,点到平面的投影

空间点Po(X,Y,Z),以及空间平面(Pp, Np) 其中Pp是平面上任意一点,Np是平面的单位法向量,那么 Po在平面(Pp,Np)上的投影点坐标P = Po - Np * ((Po-Pp)*Np) 理由就是Po到平面的距离就是D=((Po-Pp)*Np),把Po沿着法向量的反方向移动D就可以了

MatLab Code

Po=[5.116,3.769,0.851];
Pa=[3.351,1.419,-1.669];
Pb=[-1.249,2.196,0.851];
Pc=[2.646,0.2,4.054];
Np = cross((Pa-Pb),(Pc-Pb));
Np = Np / norm(Np);
P = Po - Np * ((Po-Pb) * Np');
//P =
//
//    4.1833    0.7237    0.0875

3D Transformation matrix math

Local mat to world Mat

WorldMat = LocalMat * ParentWorldMat
All Matrixes are 4x4

Local Translation to World Translation

WorldVec = LocalVec * ParentWorldMat

How To Fix Windows 8/Windows 10 touchscreen stopped working

See this link How To Fix Windows Touch Screen