Opengl function to convert trianglelist to trianglestrip

Graphics and GPU Programming Programming OpenGL

Started by jor1980 March 03, 2010 09:57 AM

2 comments, last by V-man 14 years, 1 month ago

jor1980

152

Author

March 03, 2010 09:57 AM

HI, i would like to know if exists an opengl function to convert trianglelists into triangletrips Thank´s

mrbastard

1,577

March 03, 2010 09:59 AM

There doesn't. But you can download nvidia's nvtristrip lib.

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swiftcoder

18,997

March 03, 2010 10:19 AM

Quote:Original post by jor1980
HI, i would like to know if exists an opengl function to convert trianglelists into triangletrips

Unless you are targeting very ancient hardware, triangle strips are unlikely to represent a performance gain.

The sweet spot for all modern hardware is 'indexed triangle lists' (plenty of info on google, etc.). The primary benefit is that indexed lists can allow the hardware vertex cache to function very efficiently.

The NvTriStrip library mentioned by mrbastard also works well to optimise indexed triangle lists [smile]

Tristam MacDonald. Ex-BigTech Software Engineer. Future farmer. [https://trist.am]

V-man

813

March 03, 2010 04:04 PM

GL_TRIANGLE_LIST is bullshit.
What you need is index reordering algorithm for GL_TRIANGLES.

Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);

Opengl function to convert trianglelist to trianglestrip

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Opengl function to convert trianglelist to trianglestrip

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