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torus ported. All shapes drawn with glDrawArrays and glDrawElements now.

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Next is to use the same drawing functions for all shapes, all those with
circles still have their own now


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1269 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dcnieho 2012-04-28 17:01:44 +00:00
parent 93e05f42de
commit a01a0426e7
1 changed files with 22 additions and 42 deletions
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64
freeglut/freeglut/src/fg_geometry.c
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@ -1757,22 +1757,39 @@ static void fghTorus( double dInnerRadius, double dOuterRadius, GLint nSides, GL
GLushort *stripIdx;
/* Allocate buffers for indices, bail out if memory allocation fails */
//stripIdx = malloc((slices+1)*2*(stacks+2)*sizeof(GLushort));
stripIdx = malloc((nRings+1)*2*nSides*sizeof(GLushort));
if (!(stripIdx))
{
free(stripIdx);
fgError("Failed to allocate memory in fghTorus");
}
for( i=0, idx=0; i<nSides; i++ )
{
int ioff = 1;
if (i==nSides-1)
ioff = -i;
for( j=0; j<nRings; j++, idx+=2 )
{
int offset = j * nSides + i;
stripIdx[idx ] = offset;
stripIdx[idx+1] = offset + ioff;
}
/* repeat first to close off shape */
stripIdx[idx ] = i;
stripIdx[idx+1] = i + ioff;
idx +=2;
}
/* draw */
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, vertices);
glNormalPointer(GL_FLOAT, 0, normals);
/*draw stacks*/
//for (i=0; i<stacks+2; i++)
// glDrawElements(GL_TRIANGLE_STRIP,(slices+1)*2,GL_UNSIGNED_SHORT,stripIdx+i*(slices+1)*2);
for (i=0; i<nSides; i++)
glDrawElements(GL_TRIANGLE_STRIP,(nRings+1)*2,GL_UNSIGNED_SHORT,stripIdx+i*(nRings+1)*2);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
@ -1869,46 +1886,9 @@ void FGAPIENTRY glutWireTorus( double dInnerRadius, double dOuterRadius, GLint n
*/
void FGAPIENTRY glutSolidTorus( double dInnerRadius, double dOuterRadius, GLint nSides, GLint nRings )
{
GLfloat *vertex, *normal;
int i, j, nVert;
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidTorus" );
fghGenerateTorus(
dInnerRadius, dOuterRadius, nSides, nRings, /* input */
&vertex, &normal, &nVert /* output */
);
for( i=0; i<nSides; i++ )
{
int offset;
int ioff = 3;
if (i==nSides-1)
ioff = -i*3;
glBegin( GL_TRIANGLE_STRIP );
for( j=0; j<nRings; j++ )
{
offset = 3 * ( j * nSides + i ) ;
glNormal3fv( normal + offset );
glVertex3fv( vertex + offset );
glNormal3fv( normal + offset + ioff );
glVertex3fv( vertex + offset + ioff );
}
/* repeat first to close off shape */
offset = 3 * i;
glNormal3fv( normal + offset );
glVertex3fv( vertex + offset );
glNormal3fv( normal + offset + ioff );
glVertex3fv( vertex + offset + ioff );
glEnd();
}
free ( vertex ) ;
free ( normal ) ;
fghTorus(dInnerRadius, dOuterRadius, nSides, nRings, FALSE);
}
#endif /* EGL_VERSION_1_0 */