static void draw_surface()
{
GLint i;
#ifdef GL_EXT_vertex_array
if (use_vertex_arrays)
{
glDrawArraysEXT( GL_TRIANGLE_STRIP, 0, numverts );
}
else
#endif
{
glBegin( GL_TRIANGLE_STRIP );
for (i=0;i<numverts;i++)
{
glNormal3fv( norms[i] );
glVertex3fv( verts[i] );
}
glEnd();
}
}
static void draw_surface( unsigned int with_state )
{
GLint i, j;
if (with_state & DISPLAYLIST) {
if ((with_state & (RENDER_STYLE_MASK|PRIMITIVE_MASK|MATERIAL_MASK)) !=
dlist_state) {
/*
*/
fprintf(stderr, "rebuilding displaylist\n");
if (dlist_state)
glDeleteLists( surf1, 1 );
dlist_state = with_state & (RENDER_STYLE_MASK|PRIMITIVE_MASK|
MATERIAL_MASK);
surf1 = glGenLists(1);
glNewList(surf1, GL_COMPILE);
draw_surface( dlist_state );
glEndList();
}
glCallList( surf1 );
return;
}
switch (with_state & (RENDER_STYLE_MASK|PRIMITIVE_MASK)) {
#ifdef GL_EXT_vertex_array
case (DRAW_ELTS|TRIANGLES):
if (with_state & MATERIALS) {
for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) {
GLuint nr = MIN(num_tri_verts-i, 600);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, col[j]);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, col[j]);
glDrawElements( GL_TRIANGLES, nr, GL_UNSIGNED_INT, tri_indices+i );
}
} else {
glDrawElements( GL_TRIANGLES, num_tri_verts, GL_UNSIGNED_INT,
tri_indices );
}
break;
case (DRAW_ARRAYS|TRIANGLES):
glDrawArraysEXT( GL_TRIANGLES, 0, (numverts-2)*3 );
break;
case (ARRAY_ELT|TRIANGLES):
if (with_state & MATERIALS) {
for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) {
GLuint nr = MIN(num_tri_verts-i, 600);
GLuint k;
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, col[j]);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, col[j]);
glBegin( GL_TRIANGLES );
for (k = 0 ; k < nr ; k++)
glArrayElement( tri_indices[i+k] );
glEnd();
}
} else {
glBegin( GL_TRIANGLES );
for (i = 0 ; i < num_tri_verts ; i++)
glArrayElement( tri_indices[i] );
glEnd();
}
break;
/* Uses the original arrays (including duplicate elements):
*/
case (DRAW_ARRAYS|STRIPS):
glDrawArraysEXT( GL_TRIANGLE_STRIP, 0, numverts );
break;
case (DRAW_ELTS|STRIPS):
glDrawElements( GL_TRIANGLE_STRIP, numverts,
GL_UNSIGNED_INT, strip_indices );
break;
/* Uses the original arrays (including duplicate elements):
*/
case (ARRAY_ELT|STRIPS):
glBegin( GL_TRIANGLE_STRIP );
for (i = 0 ; i < numverts ; i++)
glArrayElement( i );
glEnd();
break;
case (DRAW_ARRAYS|POINTS):
glDrawArraysEXT( GL_POINTS, 0, numuniq );
break;
case (DRAW_ELTS|POINTS):
/* can use numuniq with strip_indices as strip_indices[i] == i.
*/
glDrawElements( GL_POINTS, numuniq,
GL_UNSIGNED_INT, strip_indices );
break;
case (ARRAY_ELT|POINTS):
/* just emit each unique element once:
*/
glBegin( GL_POINTS );
for (i = 0 ; i < numuniq ; i++)
glArrayElement( i );
glEnd();
break;
#endif
case (GLVERTEX|TRIANGLES):
if (with_state & MATERIALS) {
for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) {
GLuint nr = MIN(num_tri_verts-i, 600);
GLuint k;
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, col[j]);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, col[j]);
glBegin( GL_TRIANGLES );
for (k = 0 ; k < nr ; k++) {
glNormal3fv( &compressed_data[tri_indices[i+k]][3] );
glVertex3fv( &compressed_data[tri_indices[i+k]][0] );
}
glEnd();
}
} else {
glBegin( GL_TRIANGLES );
for (i = 0 ; i < num_tri_verts ; i++) {
glNormal3fv( &compressed_data[tri_indices[i]][3] );
glVertex3fv( &compressed_data[tri_indices[i]][0] );
}
glEnd();
}
break;
case (GLVERTEX|POINTS):
/* Renders all points, but not in strip order... Shouldn't be a
* problem, but people may be confused as to why points are so
* much faster in this demo... And why cva doesn't help them...
*/
glBegin( GL_POINTS );
for ( i = 0 ; i < numuniq ; i++ ) {
glNormal3fv( &compressed_data[i][3] );
glVertex3fv( &compressed_data[i][0] );
}
glEnd();
break;
case (GLVERTEX|STRIPS):
glBegin( GL_TRIANGLE_STRIP );
for (i=0;i<numverts;i++) {
glNormal3fv( &data[i][3] );
glVertex3fv( &data[i][0] );
}
glEnd();
break;
default:
fprintf(stderr, "unimplemented mode %x...\n",
(with_state & (RENDER_STYLE_MASK|PRIMITIVE_MASK)));
break;
}
}
