Re: [PD] mesh_square

marius schebella a écrit :

cyrille henry wrote:

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marius schebella a écrit :

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hi cyrille, with mesh_square, are there other arguments to the draw message than "default" "line" and "point"?

you can send to mesh_square all draw style that you can send to any other gem primitive. but only this one work as expected.

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and what is the "default" draw method?

if(m_drawType==GL_DEFAULT_GEM)m_drawType=GL_TRIANGLE_STRIP;

if I send the message draw triangle_strip then it looks different than the default. if I send draw + integernumber, I get error: Bad arguments for message 'draw' to object 'mesh_square'

what's the problem with draw DEFAULT?

in gemshape.cpp you'll find :

switch (c){ case 'D': // default m_drawType = GL_DEFAULT_GEM; break; case 'L': // line m_drawType = GL_LINE_LOOP; break; case 'F': // fill m_drawType = GL_POLYGON; break; case 'Q': // quads m_drawType = GL_QUADS; break; case 'P': // point m_drawType = GL_POINTS; break; case 'T': // triangles m_drawType = GL_TRIANGLES; break; case 'S': // strip m_drawType = GL_TRIANGLE_STRIP; break;
in this code, c is the 1st letter after "draw ". so draw Triangle_strip is the same as draw Triangle, or draw Turtle try "draw STRIP", or "draw Something" to draw triangle_strip.... (STRIP in more logic, but anything starting with S will work).

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how are the vertices connected/what is the order of the vertices?

the best explanation i can provide is from the source code! :

   for (int i=0; i<(gridX-1) ; i++)
   {
       glBegin(m_drawType);
       for (int j = 0; j < gridY ; j++)
       {
           glTexCoord2fv( texCoords[i][j] );
           glVertex3f( m_size * (i*sizeX - 1), m_size * (j*sizeY 

-1) , 0);

           glTexCoord2fv( texCoords[i+1][j] );
           glVertex3f(  m_size * ((i+1)*sizeX - 1), m_size * 

(j*sizeY -1), 0); } glEnd(); }

I should read more code, this is not so difficult as I thought...

yes, really. it's the best documentation ever! gem code is usually very clear.

cyrille

marius.