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native tristrip support

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This commit is contained in:
David Rose 2008-08-08 18:57:20 +00:00
parent 4990a8f2bc
commit db1877d141
2 changed files with 144 additions and 3 deletions
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145
panda/src/tinydisplay/tinyGraphicsStateGuardian.cxx
View File

@ -94,6 +94,7 @@ reset() {
_supported_geom_rendering =
Geom::GR_point |
Geom::GR_indexed_other |
Geom::GR_triangle_strip |
Geom::GR_flat_last_vertex;
_max_texture_dimension = (1 << ZB_POINT_ST_FRAC_BITS);
@ -854,7 +855,7 @@ draw_triangles(const GeomPrimitivePipelineReader *reader, bool force) {
#endif // NDEBUG
int num_vertices = reader->get_num_vertices();
_vertices_immediate_pcollector.add_level(num_vertices);
_vertices_tri_pcollector.add_level(num_vertices);
if (reader->is_indexed()) {
switch (reader->get_index_type()) {
@ -920,6 +921,144 @@ draw_triangles(const GeomPrimitivePipelineReader *reader, bool force) {
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::draw_tristrips
// Access: Public, Virtual
// Description: Draws a series of triangle strips.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
draw_tristrips(const GeomPrimitivePipelineReader *reader, bool force) {
PStatTimer timer(_draw_primitive_pcollector, reader->get_current_thread());
#ifndef NDEBUG
if (tinydisplay_cat.is_spam()) {
tinydisplay_cat.spam() << "draw_tristrips: " << *(reader->get_object()) << "\n";
}
#endif // NDEBUG
// Send the individual triangle strips, stepping over the
// degenerate vertices.
CPTA_int ends = reader->get_ends();
_primitive_batches_tristrip_pcollector.add_level(ends.size());
if (reader->is_indexed()) {
unsigned int start = 0;
for (size_t i = 0; i < ends.size(); i++) {
_vertices_tristrip_pcollector.add_level(ends[i] - start);
int end = ends[i];
nassertr(end - start >= 3, false);
switch (reader->get_index_type()) {
case Geom::NT_uint8:
{
PN_uint8 *index = (PN_uint8 *)reader->get_read_pointer(force);
if (index == NULL) {
return false;
}
GLVertex *v0 = &_vertices[index[start] - _min_vertex];
GLVertex *v1 = &_vertices[index[start + 1] - _min_vertex];
bool reversed = false;
for (int vi = start + 2; vi < end; ++vi) {
GLVertex *v2 = &_vertices[index[vi] - _min_vertex];
if (reversed) {
gl_draw_triangle(_c, v1, v0, v2);
reversed = false;
} else {
gl_draw_triangle(_c, v0, v1, v2);
reversed = true;
}
v0 = v1;
v1 = v2;
}
}
break;
case Geom::NT_uint16:
{
PN_uint16 *index = (PN_uint16 *)reader->get_read_pointer(force);
if (index == NULL) {
return false;
}
GLVertex *v0 = &_vertices[index[start] - _min_vertex];
GLVertex *v1 = &_vertices[index[start + 1] - _min_vertex];
bool reversed = false;
for (int vi = start + 2; vi < end; ++vi) {
GLVertex *v2 = &_vertices[index[vi] - _min_vertex];
if (reversed) {
gl_draw_triangle(_c, v1, v0, v2);
reversed = false;
} else {
gl_draw_triangle(_c, v0, v1, v2);
reversed = true;
}
v0 = v1;
v1 = v2;
}
}
break;
case Geom::NT_uint32:
{
PN_uint32 *index = (PN_uint32 *)reader->get_read_pointer(force);
if (index == NULL) {
return false;
}
GLVertex *v0 = &_vertices[index[start] - _min_vertex];
GLVertex *v1 = &_vertices[index[start + 1] - _min_vertex];
bool reversed = false;
for (int vi = start + 2; vi < end; ++vi) {
GLVertex *v2 = &_vertices[index[vi] - _min_vertex];
if (reversed) {
gl_draw_triangle(_c, v1, v0, v2);
reversed = false;
} else {
gl_draw_triangle(_c, v0, v1, v2);
reversed = true;
}
v0 = v1;
v1 = v2;
}
}
break;
}
start = ends[i] + 2;
}
} else {
unsigned int start = 0;
int delta = reader->get_first_vertex() - _min_vertex;
for (size_t i = 0; i < ends.size(); i++) {
_vertices_tristrip_pcollector.add_level(ends[i] - start);
int end = ends[i];
nassertr(end - start >= 3, false);
GLVertex *v0 = &_vertices[start + delta];
GLVertex *v1 = &_vertices[start + delta + 1];
bool reversed = false;
for (int vi = start + 2; vi < end; ++vi) {
GLVertex *v2 = &_vertices[vi + delta];
if (reversed) {
gl_draw_triangle(_c, v1, v0, v2);
reversed = false;
} else {
gl_draw_triangle(_c, v0, v1, v2);
reversed = true;
}
v0 = v1;
v1 = v2;
}
start = ends[i] + 2;
}
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::draw_lines
// Access: Public, Virtual
@ -935,7 +1074,7 @@ draw_lines(const GeomPrimitivePipelineReader *reader, bool force) {
#endif // NDEBUG
int num_vertices = reader->get_num_vertices();
_vertices_immediate_pcollector.add_level(num_vertices);
_vertices_other_pcollector.add_level(num_vertices);
if (reader->is_indexed()) {
switch (reader->get_index_type()) {
@ -1012,7 +1151,7 @@ draw_points(const GeomPrimitivePipelineReader *reader, bool force) {
#endif // NDEBUG
int num_vertices = reader->get_num_vertices();
_vertices_immediate_pcollector.add_level(num_vertices);
_vertices_other_pcollector.add_level(num_vertices);
if (reader->is_indexed()) {
switch (reader->get_index_type()) {

2
panda/src/tinydisplay/tinyGraphicsStateGuardian.h
View File

@ -68,6 +68,8 @@ public:
bool force);
virtual bool draw_triangles(const GeomPrimitivePipelineReader *reader,
bool force);
virtual bool draw_tristrips(const GeomPrimitivePipelineReader *reader,
bool force);
virtual bool draw_lines(const GeomPrimitivePipelineReader *reader,
bool force);
virtual bool draw_points(const GeomPrimitivePipelineReader *reader,