Many updates from John Fay.
git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@32 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dheyse
parent
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commit
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@ -37,32 +37,30 @@
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/*
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/*
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* TODO BEFORE THE STABLE RELEASE:
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* TODO BEFORE THE STABLE RELEASE:
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*
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*
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* Following functions have been contributed by Andreas Umbach. I modified
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* Following functions have been contributed by Andreas Umbach.
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* them a bit to make them use GLib (for memory allocation).
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*
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*
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* glutWireCube() -- could add normal vectors so that lighting works
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* glutWireCube() -- looks OK
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* glutSolidCube() -- OK
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* glutSolidCube() -- OK
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* glutWireSphere() -- OK
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* glutWireSphere() -- OK
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* glutSolidSphere() -- OK
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* glutSolidSphere() -- OK
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*
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*
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* Following functions have been implemented by me:
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* Following functions have been implemented by Pawel and modified by John Fay:
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*
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*
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* glutWireCone() -- looks OK
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* glutWireCone() -- looks OK
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* glutSolidCone() -- normals are missing, there are holes in the thing
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* glutSolidCone() -- looks OK
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*
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*
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* Those functions need to be implemented, as nothing has been done yet.
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* Those functions have been implemented by John Fay.
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* For now all of them draw a wire or solid cube, just to mark their presence.
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*
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*
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* glutWireTorus() --
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* glutWireTorus() -- looks OK
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* glutSolidTorus() --
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* glutSolidTorus() -- looks OK
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* glutWireDodecahedron() --
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* glutWireDodecahedron() -- looks OK
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* glutSolidDodecahedron() --
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* glutSolidDodecahedron() -- looks OK
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* glutWireOctahedron() --
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* glutWireOctahedron() -- looks OK
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* glutSolidOctahedron() --
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* glutSolidOctahedron() -- looks OK
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* glutWireTetrahedron() --
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* glutWireTetrahedron() -- looks OK
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* glutSolidTetrahedron() --
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* glutSolidTetrahedron() -- looks OK
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* glutWireIcosahedron() --
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* glutWireIcosahedron() -- looks OK
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* glutSolidIcosahedron() --
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* glutSolidIcosahedron() -- looks OK
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*/
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*/
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@ -76,18 +74,20 @@ void FGAPIENTRY glutWireCube( GLdouble dSize )
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float size = (float) dSize * 0.5f;
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float size = (float) dSize * 0.5f;
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# define V(a,b,c) glVertex3f( a size, b size, c size );
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# define V(a,b,c) glVertex3f( a size, b size, c size );
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# define N(a,b,c) glNormal3f( a, b, c );
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/*
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/*
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* PWO: I dared to convert the code to use macros...
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* PWO: I dared to convert the code to use macros...
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*/
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*/
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glBegin( GL_LINE_LOOP ); V(-,-,+); V(+,-,+); V(+,+,+); V(-,+,+); glEnd();
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glBegin( GL_LINE_LOOP ); N( 1.0, 0.0, 0.0); V(+,-,+); V(+,-,-); V(+,+,-); V(+,+,+); glEnd();
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glBegin( GL_LINE_LOOP ); V(-,-,-); V(-,+,-); V(+,+,-); V(+,-,-); glEnd();
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glBegin( GL_LINE_LOOP ); N( 0.0, 1.0, 0.0); V(+,+,+); V(+,+,-); V(-,+,-); V(-,+,+); glEnd();
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glBegin( GL_LINES );
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glBegin( GL_LINE_LOOP ); N( 0.0, 0.0, 1.0); V(+,+,+); V(-,+,+); V(-,-,+); V(+,-,+); glEnd();
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V(-,-,+); V(-,-,-); V(-,+,+); V(-,+,-);
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glBegin( GL_LINE_LOOP ); N(-1.0, 0.0, 0.0); V(-,-,+); V(-,+,+); V(-,+,-); V(-,-,-); glEnd();
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V(+,-,+); V(+,-,-); V(+,+,+); V(+,+,-);
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glBegin( GL_LINE_LOOP ); N( 0.0,-1.0, 0.0); V(-,-,+); V(-,-,-); V(+,-,-); V(+,-,+); glEnd();
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glEnd();
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glBegin( GL_LINE_LOOP ); N( 0.0, 0.0,-1.0); V(-,-,-); V(-,+,-); V(+,+,-); V(+,-,-); glEnd();
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# undef V
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# undef V
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# undef N
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}
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}
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/*
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/*
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@ -104,12 +104,12 @@ void FGAPIENTRY glutSolidCube( GLdouble dSize )
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* PWO: Again, I dared to convert the code to use macros...
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* PWO: Again, I dared to convert the code to use macros...
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*/
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*/
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glBegin( GL_QUADS );
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glBegin( GL_QUADS );
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N( 1, 0, 0); V(+,-,+); V(+,-,-); V(+,+,-); V(+,+,+);
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N( 1.0, 0.0, 0.0); V(+,-,+); V(+,-,-); V(+,+,-); V(+,+,+);
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N( 0, 1, 0); V(+,+,+); V(+,+,-); V(-,+,-); V(-,+,+);
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N( 0.0, 1.0, 0.0); V(+,+,+); V(+,+,-); V(-,+,-); V(-,+,+);
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N( 0, 0, 1); V(+,+,+); V(-,+,+); V(-,-,+); V(+,-,+);
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N( 0.0, 0.0, 1.0); V(+,+,+); V(-,+,+); V(-,-,+); V(+,-,+);
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N(-1, 0, 0); V(-,-,+); V(-,+,+); V(-,+,-); V(-,-,-);
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N(-1.0, 0.0, 0.0); V(-,-,+); V(-,+,+); V(-,+,-); V(-,-,-);
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N( 0,-1, 0); V(-,-,+); V(-,-,-); V(+,-,-); V(+,-,+);
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N( 0.0,-1.0, 0.0); V(-,-,+); V(-,-,-); V(+,-,-); V(+,-,+);
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N( 0, 0,-1); V(-,-,-); V(-,+,-); V(+,+,-); V(+,-,-);
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N( 0.0, 0.0,-1.0); V(-,-,-); V(-,+,-); V(+,+,-); V(+,-,-);
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glEnd();
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glEnd();
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# undef V
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# undef V
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@ -124,6 +124,7 @@ void FGAPIENTRY glutWireSphere( GLdouble dRadius, GLint slices, GLint stacks )
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float radius = (float) dRadius, phi, psi, dpsi, dphi;
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float radius = (float) dRadius, phi, psi, dpsi, dphi;
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float* vertex;
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float* vertex;
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int i, j;
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int i, j;
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float cphi, sphi, cpsi, spsi ;
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/*
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/*
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* Allocate the vertices array
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* Allocate the vertices array
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@ -139,15 +140,19 @@ void FGAPIENTRY glutWireSphere( GLdouble dRadius, GLint slices, GLint stacks )
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for( j=0; j<stacks-1; j++ )
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for( j=0; j<stacks-1; j++ )
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{
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{
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cpsi = (float)cos ( psi ) ;
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spsi = (float)sin ( psi ) ;
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phi = 0;
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phi = 0;
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for( i=0; i<slices; i++ )
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for( i=0; i<slices; i++ )
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{
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{
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*(vertex + 3 * j * slices + 3 * i + 0) = sin( phi ) * sin( psi );
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int offset = 3 * ( j * slices + i ) ;
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*(vertex + 3 * j * slices + 3 * i + 1) = cos( phi ) * sin( psi );
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cphi = (float)cos ( phi ) ;
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*(vertex + 3 * j * slices + 3 * i + 2) = cos( psi );
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sphi = (float)sin ( phi ) ;
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*(vertex + offset + 0) = sphi * spsi ;
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*(vertex + offset + 1) = cphi * spsi ;
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*(vertex + offset + 2) = cpsi ;
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phi += dphi;
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phi += dphi;
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glVertex3fv( vertex + 3 * j * slices + 3 * i );
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}
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}
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psi += dpsi;
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psi += dpsi;
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@ -161,8 +166,9 @@ void FGAPIENTRY glutWireSphere( GLdouble dRadius, GLint slices, GLint stacks )
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for( j=0; j<stacks - 1; j++ )
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for( j=0; j<stacks - 1; j++ )
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{
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{
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glNormal3fv( vertex + 3 * j * slices + 3 * i );
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int offset = 3 * ( j * slices + i ) ;
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glVertex3fv( vertex + 3 * j * slices + 3 * i );
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glNormal3fv( vertex + offset );
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glVertex3fv( vertex + offset );
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}
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}
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glNormal3f(0, 0, -1);
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glNormal3f(0, 0, -1);
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@ -176,8 +182,9 @@ void FGAPIENTRY glutWireSphere( GLdouble dRadius, GLint slices, GLint stacks )
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for( i=0; i<slices; i++ )
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for( i=0; i<slices; i++ )
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{
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{
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glNormal3fv( vertex + 3 * j * slices + 3 * i );
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int offset = 3 * ( j * slices + i ) ;
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glVertex3fv( vertex + 3 * j * slices + 3 * i );
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glNormal3fv( vertex + offset );
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glVertex3fv( vertex + offset );
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}
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}
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glEnd();
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glEnd();
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@ -195,6 +202,7 @@ void FGAPIENTRY glutSolidSphere( GLdouble dRadius, GLint slices, GLint stacks )
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float radius = (float) dRadius, phi, psi, dpsi, dphi;
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float radius = (float) dRadius, phi, psi, dpsi, dphi;
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float *next, *tmp, *row;
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float *next, *tmp, *row;
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int i, j;
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int i, j;
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float cphi, sphi, cpsi, spsi ;
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glPushMatrix();
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glPushMatrix();
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//glScalef( radius, radius, radius );
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//glScalef( radius, radius, radius );
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@ -236,6 +244,8 @@ void FGAPIENTRY glutSolidSphere( GLdouble dRadius, GLint slices, GLint stacks )
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{
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{
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phi = 0;
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phi = 0;
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psi += dpsi;
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psi += dpsi;
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cpsi = (float)cos ( psi ) ;
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spsi = (float)sin ( psi ) ;
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/* get coords */
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/* get coords */
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glBegin( GL_QUAD_STRIP );
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glBegin( GL_QUAD_STRIP );
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@ -243,9 +253,11 @@ void FGAPIENTRY glutSolidSphere( GLdouble dRadius, GLint slices, GLint stacks )
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/* glBegin(GL_LINE_LOOP); */
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/* glBegin(GL_LINE_LOOP); */
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for( i=0; i<slices; i++ )
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for( i=0; i<slices; i++ )
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{
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{
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next[ i * 3 + 0 ] = sin( phi ) * sin( psi );
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cphi = (float)cos ( phi ) ;
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next[ i * 3 + 1 ] = cos( phi ) * sin( psi );
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sphi = (float)sin ( phi ) ;
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next[ i * 3 + 2 ] = cos( psi );
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next[ i * 3 + 0 ] = sphi * spsi ;
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next[ i * 3 + 1 ] = cphi * spsi ;
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next[ i * 3 + 2 ] = cpsi ;
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glNormal3fv( row + i * 3 );
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glNormal3fv( row + i * 3 );
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glVertex3f(
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glVertex3f(
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@ -304,78 +316,85 @@ void FGAPIENTRY glutSolidSphere( GLdouble dRadius, GLint slices, GLint stacks )
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*/
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*/
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void FGAPIENTRY glutWireCone( GLdouble base, GLdouble height, GLint slices, GLint stacks )
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void FGAPIENTRY glutWireCone( GLdouble base, GLdouble height, GLint slices, GLint stacks )
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{
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{
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float alt = (float) height / (float) (stacks + 1);
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float alt = (float) height / (float) (stacks + 1);
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float angle = (float) M_PI / (float) slices * 2.0f;
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float angle = (float) M_PI / (float) slices * 2.0f;
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float slope = (float) tan( height / base );
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float slope = (float) ( height / base );
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float* vertices = NULL;
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float sBase = (float)base ;
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int i, j;
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float sinNormal = (float)( base / sqrt ( height * height + base * base )) ;
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float cosNormal = (float)( height / sqrt ( height * height + base * base )) ;
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/*
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float* vertices = NULL;
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* We need 'slices' points on a circle
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int i, j;
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*/
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vertices = calloc( sizeof(float), 2 * (slices + 1) );
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for( i=0; i<slices+1; i++ )
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/*
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* We need 'slices' points on a circle
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*/
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vertices = calloc( sizeof(float), 2 * (slices + 1) );
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for( j=0; j<slices+1; j++ )
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{
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vertices[ j*2 + 0 ] = cos( angle * j );
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vertices[ j*2 + 1 ] = sin( angle * j );
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}
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/*
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* First the cone's bottom...
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*/
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for( j=0; j<slices; j++ )
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{
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glBegin( GL_LINE_LOOP );
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glNormal3f( 0, 0, -1 );
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glVertex3f( vertices[ (j+0)*2+0 ] * sBase, vertices[ (j+0)*2+1 ] * sBase, 0 );
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glVertex3f( vertices[ (j+1)*2+0 ] * sBase, vertices[ (j+1)*2+1 ] * sBase, 0 );
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glVertex3f( 0, 0, 0 );
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glEnd();
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}
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/*
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* Then all the stacks between the bottom and the top
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*/
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for( i=0; i<stacks; i++ )
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{
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float alt_a = i * alt, alt_b = (i + 1) * alt;
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float scl_a = (height - alt_a) / slope;
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float scl_b = (height - alt_b) / slope;
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for( j=0; j<slices; j++ )
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{
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{
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vertices[ i*2 + 0 ] = cos( angle * i );
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glBegin( GL_LINE_LOOP );
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vertices[ i*2 + 1 ] = sin( angle * i );
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glNormal3f( sinNormal * vertices[(j+0)*2+0], sinNormal * vertices[(j+0)*2+1], cosNormal ) ;
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glVertex3f( vertices[(j+0)*2+0] * scl_a, vertices[(j+0)*2+1] * scl_a, alt_a );
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glNormal3f( sinNormal * vertices[(j+1)*2+0], sinNormal * vertices[(j+1)*2+1], cosNormal ) ;
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glVertex3f( vertices[(j+1)*2+0] * scl_a, vertices[(j+1)*2+1] * scl_a, alt_a );
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glNormal3f( sinNormal * vertices[(j+0)*2+0], sinNormal * vertices[(j+0)*2+1], cosNormal ) ;
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glVertex3f( vertices[(j+0)*2+0] * scl_b, vertices[(j+0)*2+1] * scl_b, alt_b );
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glEnd();
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glBegin( GL_LINE_LOOP );
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glNormal3f( sinNormal * vertices[(j+0)*2+0], sinNormal * vertices[(j+0)*2+1], cosNormal ) ;
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glVertex3f( vertices[(j+0)*2+0] * scl_b, vertices[(j+0)*2+1] * scl_b, alt_b );
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glNormal3f( sinNormal * vertices[(j+1)*2+0], sinNormal * vertices[(j+1)*2+1], cosNormal ) ;
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glVertex3f( vertices[(j+1)*2+0] * scl_b, vertices[(j+1)*2+1] * scl_b, alt_b );
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glVertex3f( vertices[(j+1)*2+0] * scl_a, vertices[(j+1)*2+1] * scl_a, alt_a );
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glEnd();
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}
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}
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}
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/*
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/*
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* First the cone's bottom...
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* Finally have the top part drawn...
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*/
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*/
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for( i=0; i<slices; i++ )
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for( j=0; j<slices; j++ )
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{
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{
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float scl = height / slope;
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float scl = alt / slope;
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glBegin( GL_LINE_LOOP );
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glBegin( GL_LINE_LOOP );
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glNormal3f( 0, 0, -1 );
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glNormal3f( sinNormal * vertices[(j+0)*2+0], sinNormal * vertices[(j+0)*2+1], cosNormal ) ;
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glVertex3f( vertices[ (i+0)*2+0 ] * scl, vertices[ (i+0)*2+1 ] * scl, 0 );
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glVertex3f( vertices[ (j+0)*2+0 ] * scl, vertices[ (j+0)*2+1 ] * scl, height - alt );
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glVertex3f( vertices[ (i+1)*2+0 ] * scl, vertices[ (i+1)*2+1 ] * scl, 0 );
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glNormal3f( sinNormal * vertices[(j+1)*2+0], sinNormal * vertices[(j+1)*2+1], cosNormal ) ;
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glVertex3f( 0, 0, 0 );
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glVertex3f( vertices[ (j+1)*2+0 ] * scl, vertices[ (j+1)*2+1 ] * scl, height - alt );
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glEnd();
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glVertex3f( 0, 0, height );
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}
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glEnd();
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}
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/*
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* Then all the stacks between the bottom and the top
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*
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* ekhm jak wektor normalny z trojkata?
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*/
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for( i=0; i<stacks; i++ )
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{
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float alt_a = i * alt, alt_b = (i + 1) * alt;
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float scl_a = (height - alt_a) / slope;
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float scl_b = (height - alt_b) / slope;
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for( j=0; j<slices; j++ )
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{
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glBegin( GL_LINE_LOOP );
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glVertex3f( vertices[(j+0)*2+0] * scl_a, vertices[(j+0)*2+1] * scl_a, alt_a );
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glVertex3f( vertices[(j+1)*2+0] * scl_a, vertices[(j+1)*2+1] * scl_a, alt_a );
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glVertex3f( vertices[(j+0)*2+0] * scl_b, vertices[(j+0)*2+1] * scl_b, alt_b );
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glEnd();
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glBegin( GL_LINE_LOOP );
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glVertex3f( vertices[(j+0)*2+0] * scl_b, vertices[(j+0)*2+1] * scl_b, alt_b );
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glVertex3f( vertices[(j+1)*2+0] * scl_b, vertices[(j+1)*2+1] * scl_b, alt_b );
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glVertex3f( vertices[(j+1)*2+0] * scl_a, vertices[(j+1)*2+1] * scl_a, alt_a );
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glEnd();
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}
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||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Finally have the top part drawn...
|
|
||||||
*/
|
|
||||||
for( i=0; i<slices; i++ )
|
|
||||||
{
|
|
||||||
float scl = alt / slope;
|
|
||||||
|
|
||||||
glBegin( GL_LINE_LOOP );
|
|
||||||
glVertex3f( vertices[ (i+0)*2+0 ] * scl, vertices[ (i+0)*2+1 ] * scl, height - alt );
|
|
||||||
glVertex3f( vertices[ (i+1)*2+0 ] * scl, vertices[ (i+1)*2+1 ] * scl, height - alt );
|
|
||||||
glVertex3f( 0, 0, height );
|
|
||||||
glEnd();
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
@ -383,78 +402,87 @@ void FGAPIENTRY glutWireCone( GLdouble base, GLdouble height, GLint slices, GLin
|
|||||||
*/
|
*/
|
||||||
void FGAPIENTRY glutSolidCone( GLdouble base, GLdouble height, GLint slices, GLint stacks )
|
void FGAPIENTRY glutSolidCone( GLdouble base, GLdouble height, GLint slices, GLint stacks )
|
||||||
{
|
{
|
||||||
float alt = (float) height / (float) (stacks + 1);
|
float alt = (float) height / (float) (stacks + 1);
|
||||||
float angle = (float) M_PI / (float) slices * 2.0f;
|
float angle = (float) M_PI / (float) slices * 2.0f;
|
||||||
float slope = (float) tan( height / base );
|
float slope = (float) ( height / base );
|
||||||
float* vertices = NULL;
|
float sBase = (float)base ;
|
||||||
int i, j;
|
float sinNormal = (float)( base / sqrt ( height * height + base * base )) ;
|
||||||
|
float cosNormal = (float)( height / sqrt ( height * height + base * base )) ;
|
||||||
|
|
||||||
/*
|
float* vertices = NULL;
|
||||||
* We need 'slices' points on a circle
|
int i, j;
|
||||||
*/
|
|
||||||
vertices = calloc( sizeof(float), 2 * (slices + 1) );
|
|
||||||
|
|
||||||
for( i=0; i<slices+1; i++ )
|
/*
|
||||||
|
* We need 'slices' points on a circle
|
||||||
|
*/
|
||||||
|
vertices = calloc( sizeof(float), 2 * (slices + 1) );
|
||||||
|
|
||||||
|
for( j=0; j<slices+1; j++ )
|
||||||
|
{
|
||||||
|
vertices[ j*2 + 0 ] = cos( angle * j );
|
||||||
|
vertices[ j*2 + 1 ] = sin( angle * j );
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* First the cone's bottom...
|
||||||
|
*/
|
||||||
|
for( j=0; j<slices; j++ )
|
||||||
|
{
|
||||||
|
float scl = height / slope;
|
||||||
|
|
||||||
|
glBegin( GL_TRIANGLES );
|
||||||
|
glNormal3f( 0, 0, -1 );
|
||||||
|
glVertex3f( vertices[ (j+0)*2+0 ] * sBase, vertices[ (j+0)*2+1 ] * sBase, 0 );
|
||||||
|
glVertex3f( vertices[ (j+1)*2+0 ] * sBase, vertices[ (j+1)*2+1 ] * sBase, 0 );
|
||||||
|
glVertex3f( 0, 0, 0 );
|
||||||
|
glEnd();
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Then all the stacks between the bottom and the top
|
||||||
|
*/
|
||||||
|
for( i=0; i<stacks; i++ )
|
||||||
|
{
|
||||||
|
float alt_a = i * alt, alt_b = (i + 1) * alt;
|
||||||
|
float scl_a = (height - alt_a) / slope;
|
||||||
|
float scl_b = (height - alt_b) / slope;
|
||||||
|
|
||||||
|
for( j=0; j<slices; j++ )
|
||||||
{
|
{
|
||||||
vertices[ i*2 + 0 ] = cos( angle * i );
|
glBegin( GL_TRIANGLES );
|
||||||
vertices[ i*2 + 1 ] = sin( angle * i );
|
glNormal3f( sinNormal * vertices[(j+0)*2+0], sinNormal * vertices[(j+0)*2+1], cosNormal ) ;
|
||||||
|
glVertex3f( vertices[(j+0)*2+0] * scl_a, vertices[(j+0)*2+1] * scl_a, alt_a );
|
||||||
|
glNormal3f( sinNormal * vertices[(j+1)*2+0], sinNormal * vertices[(j+1)*2+1], cosNormal ) ;
|
||||||
|
glVertex3f( vertices[(j+1)*2+0] * scl_a, vertices[(j+1)*2+1] * scl_a, alt_a );
|
||||||
|
glNormal3f( sinNormal * vertices[(j+0)*2+0], sinNormal * vertices[(j+0)*2+1], cosNormal ) ;
|
||||||
|
glVertex3f( vertices[(j+0)*2+0] * scl_b, vertices[(j+0)*2+1] * scl_b, alt_b );
|
||||||
|
glEnd();
|
||||||
|
|
||||||
|
glBegin( GL_TRIANGLES );
|
||||||
|
glNormal3f( sinNormal * vertices[(j+0)*2+0], sinNormal * vertices[(j+0)*2+1], cosNormal ) ;
|
||||||
|
glVertex3f( vertices[(j+0)*2+0] * scl_b, vertices[(j+0)*2+1] * scl_b, alt_b );
|
||||||
|
glNormal3f( sinNormal * vertices[(j+1)*2+0], sinNormal * vertices[(j+1)*2+1], cosNormal ) ;
|
||||||
|
glVertex3f( vertices[(j+1)*2+0] * scl_b, vertices[(j+1)*2+1] * scl_b, alt_b );
|
||||||
|
glVertex3f( vertices[(j+1)*2+0] * scl_a, vertices[(j+1)*2+1] * scl_a, alt_a );
|
||||||
|
glEnd();
|
||||||
}
|
}
|
||||||
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* First the cone's bottom...
|
* Finally have the top part drawn...
|
||||||
*/
|
*/
|
||||||
for( i=0; i<slices; i++ )
|
for( j=0; j<slices; j++ )
|
||||||
{
|
{
|
||||||
float scl = height / slope;
|
float scl = alt / slope;
|
||||||
|
|
||||||
glBegin( GL_TRIANGLES );
|
glBegin( GL_TRIANGLES );
|
||||||
glNormal3f( 0, 0, -1 );
|
glNormal3f( sinNormal * vertices[(j+0)*2+0], sinNormal * vertices[(j+0)*2+1], cosNormal ) ;
|
||||||
glVertex3f( vertices[ (i+0)*2+0 ] * scl, vertices[ (i+0)*2+1 ] * scl, 0 );
|
glVertex3f( vertices[ (j+0)*2+0 ] * scl, vertices[ (j+0)*2+1 ] * scl, height - alt );
|
||||||
glVertex3f( vertices[ (i+1)*2+0 ] * scl, vertices[ (i+1)*2+1 ] * scl, 0 );
|
glNormal3f( sinNormal * vertices[(j+1)*2+0], sinNormal * vertices[(j+1)*2+1], cosNormal ) ;
|
||||||
glVertex3f( 0, 0, 0 );
|
glVertex3f( vertices[ (j+1)*2+0 ] * scl, vertices[ (j+1)*2+1 ] * scl, height - alt );
|
||||||
glEnd();
|
glVertex3f( 0, 0, height );
|
||||||
}
|
glEnd();
|
||||||
|
}
|
||||||
/*
|
|
||||||
* Then all the stacks between the bottom and the top
|
|
||||||
*
|
|
||||||
* ekhm jak wektor normalny z trojkata?
|
|
||||||
*/
|
|
||||||
for( i=0; i<stacks; i++ )
|
|
||||||
{
|
|
||||||
float alt_a = i * alt, alt_b = (i + 1) * alt;
|
|
||||||
float scl_a = (height - alt_a) / slope;
|
|
||||||
float scl_b = (height - alt_b) / slope;
|
|
||||||
|
|
||||||
for( j=0; j<slices; j++ )
|
|
||||||
{
|
|
||||||
glBegin( GL_TRIANGLES );
|
|
||||||
glVertex3f( vertices[(j+0)*2+0] * scl_a, vertices[(j+0)*2+1] * scl_a, alt_a );
|
|
||||||
glVertex3f( vertices[(j+1)*2+0] * scl_a, vertices[(j+1)*2+1] * scl_a, alt_a );
|
|
||||||
glVertex3f( vertices[(j+0)*2+0] * scl_b, vertices[(j+0)*2+1] * scl_b, alt_b );
|
|
||||||
glEnd();
|
|
||||||
|
|
||||||
glBegin( GL_TRIANGLES );
|
|
||||||
glVertex3f( vertices[(j+1)*2+0] * scl_a, vertices[(j+1)*2+1] * scl_a, alt_a );
|
|
||||||
glVertex3f( vertices[(j+1)*2+0] * scl_b, vertices[(j+1)*2+1] * scl_b, alt_b );
|
|
||||||
glVertex3f( vertices[(j+0)*2+0] * scl_b, vertices[(j+0)*2+1] * scl_b, alt_b );
|
|
||||||
glEnd();
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Finally have the top part drawn...
|
|
||||||
*/
|
|
||||||
for( i=0; i<slices; i++ )
|
|
||||||
{
|
|
||||||
float scl = alt / slope;
|
|
||||||
|
|
||||||
glBegin( GL_TRIANGLES );
|
|
||||||
glVertex3f( vertices[ (i+0)*2+0 ] * scl, vertices[ (i+0)*2+1 ] * scl, height - alt );
|
|
||||||
glVertex3f( vertices[ (i+1)*2+0 ] * scl, vertices[ (i+1)*2+1 ] * scl, height - alt );
|
|
||||||
glVertex3f( 0, 0, height );
|
|
||||||
glEnd();
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
@ -462,7 +490,77 @@ void FGAPIENTRY glutSolidCone( GLdouble base, GLdouble height, GLint slices, GLi
|
|||||||
*/
|
*/
|
||||||
void FGAPIENTRY glutWireTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GLint nSides, GLint nRings )
|
void FGAPIENTRY glutWireTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GLint nSides, GLint nRings )
|
||||||
{
|
{
|
||||||
glutWireSphere( dOuterRadius, 5, 5 );
|
float iradius = (float) dInnerRadius, oradius = (float)dOuterRadius, phi, psi, dpsi, dphi;
|
||||||
|
float* vertex, *normal;
|
||||||
|
int i, j;
|
||||||
|
float spsi, cpsi, sphi, cphi ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Allocate the vertices array
|
||||||
|
*/
|
||||||
|
vertex = calloc( sizeof(float), 3 * nSides * nRings );
|
||||||
|
normal = calloc( sizeof(float), 3 * nSides * nRings );
|
||||||
|
|
||||||
|
glPushMatrix();
|
||||||
|
|
||||||
|
dpsi = 2.0 * M_PI / (float)nRings ;
|
||||||
|
dphi = 2.0 * M_PI / (float)nSides ;
|
||||||
|
psi = 0.0;
|
||||||
|
|
||||||
|
for( j=0; j<nRings; j++ )
|
||||||
|
{
|
||||||
|
cpsi = (float)cos ( psi ) ;
|
||||||
|
spsi = (float)sin ( psi ) ;
|
||||||
|
phi = 0.0;
|
||||||
|
|
||||||
|
for( i=0; i<nSides; i++ )
|
||||||
|
{
|
||||||
|
int offset = 3 * ( j * nSides + i ) ;
|
||||||
|
cphi = (float)cos ( phi ) ;
|
||||||
|
sphi = (float)sin ( phi ) ;
|
||||||
|
*(vertex + offset + 0) = cpsi * ( oradius + cphi * iradius ) ;
|
||||||
|
*(vertex + offset + 1) = spsi * ( oradius + cphi * iradius ) ;
|
||||||
|
*(vertex + offset + 2) = sphi * iradius ;
|
||||||
|
*(normal + offset + 0) = cpsi * cphi ;
|
||||||
|
*(normal + offset + 1) = spsi * cphi ;
|
||||||
|
*(normal + offset + 2) = sphi ;
|
||||||
|
phi += dphi;
|
||||||
|
}
|
||||||
|
|
||||||
|
psi += dpsi;
|
||||||
|
}
|
||||||
|
|
||||||
|
for( i=0; i<nSides; i++ )
|
||||||
|
{
|
||||||
|
glBegin( GL_LINE_LOOP );
|
||||||
|
|
||||||
|
for( j=0; j<nRings; j++ )
|
||||||
|
{
|
||||||
|
int offset = 3 * ( j * nSides + i ) ;
|
||||||
|
glNormal3fv( normal + offset );
|
||||||
|
glVertex3fv( vertex + offset );
|
||||||
|
}
|
||||||
|
|
||||||
|
glEnd();
|
||||||
|
}
|
||||||
|
|
||||||
|
for( j=0; j<nRings; j++ )
|
||||||
|
{
|
||||||
|
glBegin(GL_LINE_LOOP);
|
||||||
|
|
||||||
|
for( i=0; i<nSides; i++ )
|
||||||
|
{
|
||||||
|
int offset = 3 * ( j * nSides + i ) ;
|
||||||
|
glNormal3fv( normal + offset );
|
||||||
|
glVertex3fv( vertex + offset );
|
||||||
|
}
|
||||||
|
|
||||||
|
glEnd();
|
||||||
|
}
|
||||||
|
|
||||||
|
free ( vertex ) ;
|
||||||
|
free ( normal ) ;
|
||||||
|
glPopMatrix();
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
@ -470,7 +568,74 @@ void FGAPIENTRY glutWireTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GLi
|
|||||||
*/
|
*/
|
||||||
void FGAPIENTRY glutSolidTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GLint nSides, GLint nRings )
|
void FGAPIENTRY glutSolidTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GLint nSides, GLint nRings )
|
||||||
{
|
{
|
||||||
glutSolidSphere( dOuterRadius, 5, 5 );
|
float iradius = (float) dInnerRadius, oradius = (float)dOuterRadius, phi, psi, dpsi, dphi;
|
||||||
|
float* vertex, *normal;
|
||||||
|
int i, j;
|
||||||
|
float spsi, cpsi, sphi, cphi ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Increment the number of sides and rings to allow for one more point than surface
|
||||||
|
*/
|
||||||
|
nSides ++ ;
|
||||||
|
nRings ++ ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Allocate the vertices array
|
||||||
|
*/
|
||||||
|
vertex = calloc( sizeof(float), 3 * nSides * nRings );
|
||||||
|
normal = calloc( sizeof(float), 3 * nSides * nRings );
|
||||||
|
|
||||||
|
glPushMatrix();
|
||||||
|
|
||||||
|
dpsi = 2.0 * M_PI / (float)(nRings - 1) ;
|
||||||
|
dphi = 2.0 * M_PI / (float)(nSides - 1) ;
|
||||||
|
psi = 0.0;
|
||||||
|
|
||||||
|
for( j=0; j<nRings; j++ )
|
||||||
|
{
|
||||||
|
cpsi = (float)cos ( psi ) ;
|
||||||
|
spsi = (float)sin ( psi ) ;
|
||||||
|
phi = 0.0;
|
||||||
|
|
||||||
|
for( i=0; i<nSides; i++ )
|
||||||
|
{
|
||||||
|
int offset = 3 * ( j * nSides + i ) ;
|
||||||
|
cphi = (float)cos ( phi ) ;
|
||||||
|
sphi = (float)sin ( phi ) ;
|
||||||
|
*(vertex + offset + 0) = cpsi * ( oradius + cphi * iradius ) ;
|
||||||
|
*(vertex + offset + 1) = spsi * ( oradius + cphi * iradius ) ;
|
||||||
|
*(vertex + offset + 2) = sphi * iradius ;
|
||||||
|
*(normal + offset + 0) = cpsi * cphi ;
|
||||||
|
*(normal + offset + 1) = spsi * cphi ;
|
||||||
|
*(normal + offset + 2) = sphi ;
|
||||||
|
phi += dphi;
|
||||||
|
}
|
||||||
|
|
||||||
|
psi += dpsi;
|
||||||
|
}
|
||||||
|
|
||||||
|
glBegin( GL_QUADS );
|
||||||
|
for( i=0; i<nSides-1; i++ )
|
||||||
|
{
|
||||||
|
for( j=0; j<nRings-1; j++ )
|
||||||
|
{
|
||||||
|
int offset = 3 * ( j * nSides + i ) ;
|
||||||
|
glNormal3fv( normal + offset );
|
||||||
|
glVertex3fv( vertex + offset );
|
||||||
|
glNormal3fv( normal + offset + 3 );
|
||||||
|
glVertex3fv( vertex + offset + 3 );
|
||||||
|
glNormal3fv( normal + offset + 3 * nSides + 3 );
|
||||||
|
glVertex3fv( vertex + offset + 3 * nSides + 3 );
|
||||||
|
glNormal3fv( normal + offset + 3 * nSides );
|
||||||
|
glVertex3fv( vertex + offset + 3 * nSides );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
glEnd();
|
||||||
|
|
||||||
|
free ( vertex ) ;
|
||||||
|
free ( normal ) ;
|
||||||
|
glPopMatrix();
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
@ -670,14 +835,14 @@ void FGAPIENTRY glutSolidTetrahedron( void )
|
|||||||
/*
|
/*
|
||||||
*
|
*
|
||||||
*/
|
*/
|
||||||
float r[12][3] = { { 1.0f, 0.0f, 0.0f },
|
float icos_r[12][3] = { { 1.0f, 0.0f, 0.0f },
|
||||||
{ 0.447214f, 0.894427f, 0.0f }, { 0.447214f, 0.276393f, 0.850651f }, { 0.447214f, -0.723607f, 0.525731f }, { 0.447214f, -0.723607f, -0.525731f }, { 0.447214f, 0.276393f, -0.850651f },
|
{ 0.447214f, 0.894427f, 0.0f }, { 0.447214f, 0.276393f, 0.850651f }, { 0.447214f, -0.723607f, 0.525731f }, { 0.447214f, -0.723607f, -0.525731f }, { 0.447214f, 0.276393f, -0.850651f },
|
||||||
{ -0.447214f, -0.894427f, 0.0f }, { -0.447214f, -0.276393f, 0.850651f }, { -0.447214f, 0.723607f, 0.525731f }, { -0.447214f, 0.723607f, -0.525731f }, { -0.447214f, -0.276393f, -0.850651f },
|
{ -0.447214f, -0.894427f, 0.0f }, { -0.447214f, -0.276393f, 0.850651f }, { -0.447214f, 0.723607f, 0.525731f }, { -0.447214f, 0.723607f, -0.525731f }, { -0.447214f, -0.276393f, -0.850651f },
|
||||||
{ -1.0f, 0.0f, 0.0f } } ;
|
{ -1.0f, 0.0f, 0.0f } } ;
|
||||||
int v [20][3] = { { 0, 1, 2 }, { 0, 2, 3 }, { 0, 3, 4 }, { 0, 4, 5 }, { 0, 5, 1 },
|
int icos_v [20][3] = { { 0, 1, 2 }, { 0, 2, 3 }, { 0, 3, 4 }, { 0, 4, 5 }, { 0, 5, 1 },
|
||||||
{ 1, 8, 2 }, { 2, 7, 3 }, { 3, 6, 4 }, { 4, 10, 5 }, { 5, 9, 1 },
|
{ 1, 8, 2 }, { 2, 7, 3 }, { 3, 6, 4 }, { 4, 10, 5 }, { 5, 9, 1 },
|
||||||
{ 1, 9, 8 }, { 2, 8, 7 }, { 3, 7, 6 }, { 4, 6, 10 }, { 5, 10, 9 },
|
{ 1, 9, 8 }, { 2, 8, 7 }, { 3, 7, 6 }, { 4, 6, 10 }, { 5, 10, 9 },
|
||||||
{ 11, 9, 10 }, { 11, 8, 9 }, { 11, 7, 8 }, { 11, 6, 7 }, { 11, 10, 6 } } ;
|
{ 11, 9, 10 }, { 11, 8, 9 }, { 11, 7, 8 }, { 11, 6, 7 }, { 11, 10, 6 } } ;
|
||||||
|
|
||||||
void FGAPIENTRY glutWireIcosahedron( void )
|
void FGAPIENTRY glutWireIcosahedron( void )
|
||||||
{
|
{
|
||||||
@ -685,14 +850,14 @@ void FGAPIENTRY glutWireIcosahedron( void )
|
|||||||
for ( i = 0; i < 20; i++ )
|
for ( i = 0; i < 20; i++ )
|
||||||
{
|
{
|
||||||
float normal[3] ;
|
float normal[3] ;
|
||||||
normal[0] = ( r[v[i][1]][1] - r[v[i][0]][1] ) * ( r[v[i][2]][2] - r[v[i][0]][2] ) - ( r[v[i][1]][2] - r[v[i][0]][2] ) * ( r[v[i][2]][1] - r[v[i][0]][1] ) ;
|
normal[0] = ( icos_r[icos_v[i][1]][1] - icos_r[icos_v[i][0]][1] ) * ( icos_r[icos_v[i][2]][2] - icos_r[icos_v[i][0]][2] ) - ( icos_r[icos_v[i][1]][2] - icos_r[icos_v[i][0]][2] ) * ( icos_r[icos_v[i][2]][1] - icos_r[icos_v[i][0]][1] ) ;
|
||||||
normal[1] = ( r[v[i][1]][2] - r[v[i][0]][2] ) * ( r[v[i][2]][0] - r[v[i][0]][0] ) - ( r[v[i][1]][0] - r[v[i][0]][0] ) * ( r[v[i][2]][2] - r[v[i][0]][2] ) ;
|
normal[1] = ( icos_r[icos_v[i][1]][2] - icos_r[icos_v[i][0]][2] ) * ( icos_r[icos_v[i][2]][0] - icos_r[icos_v[i][0]][0] ) - ( icos_r[icos_v[i][1]][0] - icos_r[icos_v[i][0]][0] ) * ( icos_r[icos_v[i][2]][2] - icos_r[icos_v[i][0]][2] ) ;
|
||||||
normal[2] = ( r[v[i][1]][0] - r[v[i][0]][0] ) * ( r[v[i][2]][1] - r[v[i][0]][1] ) - ( r[v[i][1]][1] - r[v[i][0]][1] ) * ( r[v[i][2]][0] - r[v[i][0]][0] ) ;
|
normal[2] = ( icos_r[icos_v[i][1]][0] - icos_r[icos_v[i][0]][0] ) * ( icos_r[icos_v[i][2]][1] - icos_r[icos_v[i][0]][1] ) - ( icos_r[icos_v[i][1]][1] - icos_r[icos_v[i][0]][1] ) * ( icos_r[icos_v[i][2]][0] - icos_r[icos_v[i][0]][0] ) ;
|
||||||
glBegin ( GL_LINE_LOOP ) ;
|
glBegin ( GL_LINE_LOOP ) ;
|
||||||
glNormal3fv ( normal ) ;
|
glNormal3fv ( normal ) ;
|
||||||
glVertex3fv ( r[v[i][0]] ) ;
|
glVertex3fv ( icos_r[icos_v[i][0]] ) ;
|
||||||
glVertex3fv ( r[v[i][1]] ) ;
|
glVertex3fv ( icos_r[icos_v[i][1]] ) ;
|
||||||
glVertex3fv ( r[v[i][2]] ) ;
|
glVertex3fv ( icos_r[icos_v[i][2]] ) ;
|
||||||
glEnd () ;
|
glEnd () ;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
@ -708,16 +873,177 @@ void FGAPIENTRY glutSolidIcosahedron( void )
|
|||||||
for ( i = 0; i < 20; i++ )
|
for ( i = 0; i < 20; i++ )
|
||||||
{
|
{
|
||||||
float normal[3] ;
|
float normal[3] ;
|
||||||
normal[0] = ( r[v[i][1]][1] - r[v[i][0]][1] ) * ( r[v[i][2]][2] - r[v[i][0]][2] ) - ( r[v[i][1]][2] - r[v[i][0]][2] ) * ( r[v[i][2]][1] - r[v[i][0]][1] ) ;
|
normal[0] = ( icos_r[icos_v[i][1]][1] - icos_r[icos_v[i][0]][1] ) * ( icos_r[icos_v[i][2]][2] - icos_r[icos_v[i][0]][2] ) - ( icos_r[icos_v[i][1]][2] - icos_r[icos_v[i][0]][2] ) * ( icos_r[icos_v[i][2]][1] - icos_r[icos_v[i][0]][1] ) ;
|
||||||
normal[1] = ( r[v[i][1]][2] - r[v[i][0]][2] ) * ( r[v[i][2]][0] - r[v[i][0]][0] ) - ( r[v[i][1]][0] - r[v[i][0]][0] ) * ( r[v[i][2]][2] - r[v[i][0]][2] ) ;
|
normal[1] = ( icos_r[icos_v[i][1]][2] - icos_r[icos_v[i][0]][2] ) * ( icos_r[icos_v[i][2]][0] - icos_r[icos_v[i][0]][0] ) - ( icos_r[icos_v[i][1]][0] - icos_r[icos_v[i][0]][0] ) * ( icos_r[icos_v[i][2]][2] - icos_r[icos_v[i][0]][2] ) ;
|
||||||
normal[2] = ( r[v[i][1]][0] - r[v[i][0]][0] ) * ( r[v[i][2]][1] - r[v[i][0]][1] ) - ( r[v[i][1]][1] - r[v[i][0]][1] ) * ( r[v[i][2]][0] - r[v[i][0]][0] ) ;
|
normal[2] = ( icos_r[icos_v[i][1]][0] - icos_r[icos_v[i][0]][0] ) * ( icos_r[icos_v[i][2]][1] - icos_r[icos_v[i][0]][1] ) - ( icos_r[icos_v[i][1]][1] - icos_r[icos_v[i][0]][1] ) * ( icos_r[icos_v[i][2]][0] - icos_r[icos_v[i][0]][0] ) ;
|
||||||
glNormal3fv ( normal ) ;
|
glNormal3fv ( normal ) ;
|
||||||
glVertex3fv ( r[v[i][0]] ) ;
|
glVertex3fv ( icos_r[icos_v[i][0]] ) ;
|
||||||
glVertex3fv ( r[v[i][1]] ) ;
|
glVertex3fv ( icos_r[icos_v[i][1]] ) ;
|
||||||
glVertex3fv ( r[v[i][2]] ) ;
|
glVertex3fv ( icos_r[icos_v[i][2]] ) ;
|
||||||
}
|
}
|
||||||
|
|
||||||
glEnd () ;
|
glEnd () ;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
float rdod_r[14][3] = { { 0.0f, 0.0f, 1.0f },
|
||||||
|
{ 0.707107f, 0.000000f, 0.5f }, { 0.000000f, 0.707107f, 0.5f }, { -0.707107f, 0.000000f, 0.5f }, { 0.000000f, -0.707107f, 0.5f },
|
||||||
|
{ 0.707107f, 0.707107f, 0.0f }, { -0.707107f, 0.707107f, 0.0f }, { -0.707107f, -0.707107f, 0.0f }, { 0.707107f, -0.707107f, 0.0f },
|
||||||
|
{ 0.707107f, 0.000000f, -0.5f }, { 0.000000f, 0.707107f, -0.5f }, { -0.707107f, 0.000000f, -0.5f }, { 0.000000f, -0.707107f, -0.5f },
|
||||||
|
{ 0.0f, 0.0f, -1.0f } } ;
|
||||||
|
int rdod_v [12][4] = { { 0, 1, 5, 2 }, { 0, 2, 6, 3 }, { 0, 3, 7, 4 }, { 0, 4, 8, 1 },
|
||||||
|
{ 5, 10, 6, 2 }, { 6, 11, 7, 3 }, { 7, 12, 8, 4 }, { 8, 9, 5, 1 },
|
||||||
|
{ 5, 9, 13, 10 }, { 6, 10, 13, 11 }, { 7, 11, 13, 12 }, { 8, 12, 13, 9 } } ;
|
||||||
|
float rdod_n[12][3] = {
|
||||||
|
{ 0.353553f, 0.353553f, 0.5f }, { -0.353553f, 0.353553f, 0.5f }, { -0.353553f, -0.353553f, 0.5f }, { 0.353553f, -0.353553f, 0.5f },
|
||||||
|
{ 0.000000f, 1.000000f, 0.0f }, { -1.000000f, 0.000000f, 0.0f }, { 0.000000f, -1.000000f, 0.0f }, { 1.000000f, 0.000000f, 0.0f },
|
||||||
|
{ 0.353553f, 0.353553f, -0.5f }, { -0.353553f, 0.353553f, -0.5f }, { -0.353553f, -0.353553f, -0.5f }, { 0.353553f, -0.353553f, -0.5f }
|
||||||
|
} ;
|
||||||
|
|
||||||
|
void FGAPIENTRY glutWireRhombicDodecahedron( void )
|
||||||
|
{
|
||||||
|
int i ;
|
||||||
|
for ( i = 0; i < 12; i++ )
|
||||||
|
{
|
||||||
|
glBegin ( GL_LINE_LOOP ) ;
|
||||||
|
glNormal3fv ( rdod_n[i] ) ;
|
||||||
|
glVertex3fv ( rdod_r[rdod_v[i][0]] ) ;
|
||||||
|
glVertex3fv ( rdod_r[rdod_v[i][1]] ) ;
|
||||||
|
glVertex3fv ( rdod_r[rdod_v[i][2]] ) ;
|
||||||
|
glVertex3fv ( rdod_r[rdod_v[i][3]] ) ;
|
||||||
|
glEnd () ;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
void FGAPIENTRY glutSolidRhombicDodecahedron( void )
|
||||||
|
{
|
||||||
|
int i ;
|
||||||
|
|
||||||
|
glBegin ( GL_QUADS ) ;
|
||||||
|
for ( i = 0; i < 12; i++ )
|
||||||
|
{
|
||||||
|
glNormal3fv ( rdod_n[i] ) ;
|
||||||
|
glVertex3fv ( rdod_r[rdod_v[i][0]] ) ;
|
||||||
|
glVertex3fv ( rdod_r[rdod_v[i][1]] ) ;
|
||||||
|
glVertex3fv ( rdod_r[rdod_v[i][2]] ) ;
|
||||||
|
glVertex3fv ( rdod_r[rdod_v[i][3]] ) ;
|
||||||
|
}
|
||||||
|
|
||||||
|
glEnd () ;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define NUM_FACES 4
|
||||||
|
|
||||||
|
static GLfloat tetrahedron_v[4][3] = /* Vertices */
|
||||||
|
{
|
||||||
|
{ -0.5, -0.288675134, -0.144337567 },
|
||||||
|
{ 0.5, -0.288675134, -0.144337567 },
|
||||||
|
{ 0.0, 0.577350269, -0.144337567 },
|
||||||
|
{ 0.0, 0.0, 0.672159013 }
|
||||||
|
} ;
|
||||||
|
|
||||||
|
static GLint tetrahedron_i[4][3] = /* Vertex indices */
|
||||||
|
{
|
||||||
|
{ 0, 1, 2 }, { 0, 2, 3 }, { 0, 3, 1 }, { 1, 3, 2 }
|
||||||
|
} ;
|
||||||
|
|
||||||
|
static GLfloat tetrahedron_n[4][3] = /* Normals */
|
||||||
|
{
|
||||||
|
{ 0.0, 0.0, -1.0 },
|
||||||
|
{ -0.816496581, 0.471404521, 0.333333333 },
|
||||||
|
{ 0.0, -0.942809042, 0.333333333 },
|
||||||
|
{ 0.816496581, 0.471404521, 0.333333333 }
|
||||||
|
} ;
|
||||||
|
|
||||||
|
void FGAPIENTRY glutWireSierpinskiSponge ( int num_levels, GLfloat offset[3], GLfloat scale )
|
||||||
|
{
|
||||||
|
int i, j ;
|
||||||
|
|
||||||
|
if ( num_levels == 0 )
|
||||||
|
{
|
||||||
|
|
||||||
|
for ( i = 0 ; i < NUM_FACES ; i++ )
|
||||||
|
{
|
||||||
|
glBegin ( GL_LINE_LOOP ) ;
|
||||||
|
glNormal3fv ( tetrahedron_n[i] ) ;
|
||||||
|
for ( j = 0; j < 3; j++ )
|
||||||
|
{
|
||||||
|
float x = offset[0] + scale * tetrahedron_v[tetrahedron_i[i][j]][0] ;
|
||||||
|
float y = offset[1] + scale * tetrahedron_v[tetrahedron_i[i][j]][1] ;
|
||||||
|
float z = offset[2] + scale * tetrahedron_v[tetrahedron_i[i][j]][2] ;
|
||||||
|
glVertex3f ( x, y, z ) ;
|
||||||
|
}
|
||||||
|
|
||||||
|
glEnd () ;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
GLfloat local_offset[3] ; // Use a local variable to avoid buildup of roundoff errors
|
||||||
|
num_levels -- ;
|
||||||
|
scale /= 2.0 ;
|
||||||
|
local_offset[0] = offset[0] + scale * tetrahedron_v[0][0] ;
|
||||||
|
local_offset[1] = offset[1] + scale * tetrahedron_v[0][1] ;
|
||||||
|
local_offset[2] = offset[2] + scale * tetrahedron_v[0][2] ;
|
||||||
|
glutWireSierpinskiSponge ( num_levels, local_offset, scale ) ;
|
||||||
|
local_offset[0] += scale ;
|
||||||
|
glutWireSierpinskiSponge ( num_levels, local_offset, scale ) ;
|
||||||
|
local_offset[0] -= 0.5 * scale ;
|
||||||
|
local_offset[1] += 0.866025403 * scale ;
|
||||||
|
glutWireSierpinskiSponge ( num_levels, local_offset, scale ) ;
|
||||||
|
local_offset[1] -= 0.577350269 * scale ;
|
||||||
|
local_offset[2] += 0.816496581 * scale ;
|
||||||
|
glutWireSierpinskiSponge ( num_levels, local_offset, scale ) ;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void FGAPIENTRY glutSolidSierpinskiSponge ( int num_levels, GLfloat offset[3], GLfloat scale )
|
||||||
|
{
|
||||||
|
int i, j ;
|
||||||
|
|
||||||
|
if ( num_levels == 0 )
|
||||||
|
{
|
||||||
|
glBegin ( GL_TRIANGLES ) ;
|
||||||
|
|
||||||
|
for ( i = 0 ; i < NUM_FACES ; i++ )
|
||||||
|
{
|
||||||
|
glNormal3fv ( tetrahedron_n[i] ) ;
|
||||||
|
for ( j = 0; j < 3; j++ )
|
||||||
|
{
|
||||||
|
float x = offset[0] + scale * tetrahedron_v[tetrahedron_i[i][j]][0] ;
|
||||||
|
float y = offset[1] + scale * tetrahedron_v[tetrahedron_i[i][j]][1] ;
|
||||||
|
float z = offset[2] + scale * tetrahedron_v[tetrahedron_i[i][j]][2] ;
|
||||||
|
glVertex3f ( x, y, z ) ;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
glEnd () ;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
GLfloat local_offset[3] ; // Use a local variable to avoid buildup of roundoff errors
|
||||||
|
num_levels -- ;
|
||||||
|
scale /= 2.0 ;
|
||||||
|
local_offset[0] = offset[0] + scale * tetrahedron_v[0][0] ;
|
||||||
|
local_offset[1] = offset[1] + scale * tetrahedron_v[0][1] ;
|
||||||
|
local_offset[2] = offset[2] + scale * tetrahedron_v[0][2] ;
|
||||||
|
glutSolidSierpinskiSponge ( num_levels, local_offset, scale ) ;
|
||||||
|
local_offset[0] += scale ;
|
||||||
|
glutSolidSierpinskiSponge ( num_levels, local_offset, scale ) ;
|
||||||
|
local_offset[0] -= 0.5 * scale ;
|
||||||
|
local_offset[1] += 0.866025403 * scale ;
|
||||||
|
glutSolidSierpinskiSponge ( num_levels, local_offset, scale ) ;
|
||||||
|
local_offset[1] -= 0.577350269 * scale ;
|
||||||
|
local_offset[2] += 0.816496581 * scale ;
|
||||||
|
glutSolidSierpinskiSponge ( num_levels, local_offset, scale ) ;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#undef NUM_FACES
|
||||||
|
|
||||||
/*** END OF FILE ***/
|
/*** END OF FILE ***/
|
||||||
|
|||||||
Reference in New Issue
Block a user