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authorKeith Whitwell <keith@tungstengraphics.com>2001-06-04 15:34:31 +0000
committerKeith Whitwell <keith@tungstengraphics.com>2001-06-04 15:34:31 +0000
commitabd5134965665ad9f7154a08b13edfed15f00135 (patch)
tree8f0ec0bb9e167410d3ef28a42f2af85e8d4d385f /progs/demos/isosurf.c
parentbd58a63fe891f6e42c71e8a8f2c8a7990b59eae8 (diff)
fixed some GL_POINTS probs
Diffstat (limited to 'progs/demos/isosurf.c')
-rw-r--r--progs/demos/isosurf.c68
1 files changed, 42 insertions, 26 deletions
diff --git a/progs/demos/isosurf.c b/progs/demos/isosurf.c
index 85fb7f215c7..2706ad9faef 100644
--- a/progs/demos/isosurf.c
+++ b/progs/demos/isosurf.c
@@ -1,4 +1,4 @@
-/* $Id: isosurf.c,v 1.11 2001/05/11 15:47:02 keithw Exp $ */
+/* $Id: isosurf.c,v 1.12 2001/06/04 15:34:31 keithw Exp $ */
/*
* Display an isosurface of 3-D wind speed volume.
@@ -449,15 +449,20 @@ static void draw_surface( int with_state )
break;
case (DRAW_ARRAYS|POINTS):
- glDrawArraysEXT( GL_POINTS, 0, numverts );
+ glDrawArraysEXT( GL_POINTS, 0, numuniq );
break;
case (DRAW_ELTS|POINTS):
- glDrawElements( GL_POINTS, numverts, GL_UNSIGNED_INT, indices );
+ /* 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 < numverts ; i++)
- glArrayElement( indices[i] );
+ for (i = 0 ; i < numuniq ; i++)
+ glArrayElement( i );
glEnd();
break;
#endif
@@ -487,10 +492,14 @@ static void draw_surface( int with_state )
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 < numverts ; i++ ) {
- glNormal3fv( &data[i][3] );
- glVertex3fv( &data[i][0] );
+ for ( i = 0 ; i < numuniq ; i++ ) {
+ glNormal3fv( &compressed_data[i][3] );
+ glVertex3fv( &compressed_data[i][0] );
}
glEnd();
break;
@@ -713,24 +722,16 @@ static void ModeMenu(int m)
print_flags("primitive", state & PRIMITIVE_MASK);
print_flags("render style", state & RENDER_STYLE_MASK);
- if ((state & PRIMITIVE_MASK) != TRIANGLES)
- {
- fprintf(stderr, "enabling normal arrays\n");
- glVertexPointerEXT( 3, GL_FLOAT, sizeof(data[0]), numverts, data );
- glNormalPointerEXT( GL_FLOAT, sizeof(data[0]), numverts, &data[0][3]);
-#ifdef GL_EXT_compiled_vertex_array
- if (allowed & LOCKED) {
- if (state & LOCKED) {
- glLockArraysEXT( 0, numverts );
- } else {
- glUnlockArraysEXT();
- }
- }
-#endif
- }
- else if ((state & RENDER_STYLE_MASK) != DRAW_ARRAYS)
+ if ((state & PRIMITIVE_MASK) != STRIPS &&
+ ((state & RENDER_STYLE_MASK) == DRAW_ELTS ||
+ (state & RENDER_STYLE_MASK) == ARRAY_ELT ||
+ (state & PRIMITIVE_MASK) == POINTS))
{
fprintf(stderr, "enabling small arrays\n");
+ /* Rendering any primitive with draw-element/array-element
+ * --> Can't do strips here as ordering has been lost in
+ * compaction process...
+ */
glVertexPointerEXT( 3, GL_FLOAT, sizeof(data[0]), numuniq,
compressed_data );
glNormalPointerEXT( GL_FLOAT, sizeof(data[0]), numuniq,
@@ -745,9 +746,10 @@ static void ModeMenu(int m)
}
#endif
}
- else {
+ else if ((state & PRIMITIVE_MASK) == TRIANGLES &&
+ (state & RENDER_STYLE_MASK) == DRAW_ARRAYS) {
fprintf(stderr, "enabling big arrays\n");
- /* Only get here for DRAW_ARRAYS + TRIANGLES
+ /* Only get here for TRIANGLES and drawarrays
*/
glVertexPointerEXT( 3, GL_FLOAT, sizeof(data[0]), (numverts-2) * 3,
expanded_data );
@@ -764,6 +766,20 @@ static void ModeMenu(int m)
}
#endif
}
+ else {
+ fprintf(stderr, "enabling normal arrays\n");
+ glVertexPointerEXT( 3, GL_FLOAT, sizeof(data[0]), numverts, data );
+ glNormalPointerEXT( GL_FLOAT, sizeof(data[0]), numverts, &data[0][3]);
+#ifdef GL_EXT_compiled_vertex_array
+ if (allowed & LOCKED) {
+ if (state & LOCKED) {
+ glLockArraysEXT( 0, numverts );
+ } else {
+ glUnlockArraysEXT();
+ }
+ }
+#endif
+ }
}
#endif