TheCloud/panda3d
1
0
Fork 0
mirror of https://github.com/panda3d/panda3d.git synced 2025-10-03 18:31:55 -04:00
Code Issues Packages Projects Releases Wiki Activity

add a spindle to the viz

Browse Source
This commit is contained in:
David Rose 2006-09-08 18:47:54 +00:00
parent 3d415c4e0f
commit 02916bf726
3 changed files with 160 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
panda/src/pgraph/lodNode.I
View File

@ -316,7 +316,7 @@ INLINE void LODNode::Switch::
set_range(float in, float out) {
_in = in;
_out = out;
_ring_viz.clear();
clear_ring_viz();
}
////////////////////////////////////////////////////////////////////
@ -352,7 +352,7 @@ INLINE void LODNode::Switch::
rescale(float factor) {
_in *= factor;
_out *= factor;
_ring_viz.clear();
clear_ring_viz();
}
////////////////////////////////////////////////////////////////////
@ -402,6 +402,21 @@ get_ring_viz() const {
return _ring_viz;
}
////////////////////////////////////////////////////////////////////
// Function: LODNode::Switch::get_spindle_viz
// Access: Public
// Description: Returns a PandaNode suitable for rendering the center
// spindle of the LODNode, in the color of this switch.
////////////////////////////////////////////////////////////////////
INLINE PandaNode *LODNode::Switch::
get_spindle_viz() const {
if (_spindle_viz.is_null()) {
((Switch *)this)->compute_spindle_viz();
}
return _spindle_viz;
}
////////////////////////////////////////////////////////////////////
// Function: LODNode::Switch::get_viz_model_state
// Access: Public
@ -412,7 +427,7 @@ get_ring_viz() const {
INLINE const RenderState *LODNode::Switch::
get_viz_model_state() const {
if (_viz_model_state.is_null()) {
((Switch *)this)->compute_ring_viz();
((Switch *)this)->compute_viz_model_state();
}
return _viz_model_state;
@ -443,3 +458,16 @@ read_datagram(DatagramIterator &source) {
_out = source.get_float32();
}
////////////////////////////////////////////////////////////////////
// Function: LODNode::Switch::clear_ring_viz
// Access: Private
// Description: Resets the internal cache values for the ring and
// spindle viz, and related pointers, for the
// set_switch() debugging mode.
////////////////////////////////////////////////////////////////////
INLINE void LODNode::Switch::
clear_ring_viz() {
_ring_viz.clear();
_spindle_viz.clear();
_viz_model_state.clear();
}

159
panda/src/pgraph/lodNode.cxx
View File

@ -393,33 +393,28 @@ show_switches_cull_callback(CullTraverser *trav, CullTraverserData &data) {
++si) {
const Switch &sw = (*si);
if (sw.is_shown()) {
PT(PandaNode) ring_viz = sw.get_ring_viz();
CullTraverserData next_data(data, ring_viz);
CullTraverserData next_data(data, sw.get_ring_viz());
next_data._net_transform = viz_transform;
trav->traverse(next_data);
if (sw.in_range_2(dist2)) {
// This switch level is in range. Draw its children in the
// funny wireframe mode.
// This switch level is in range. Draw the spindle in this
// color.
CullTraverserData next_data2(data, sw.get_spindle_viz());
next_data2._net_transform = viz_transform;
trav->traverse(next_data2);
// And draw its children in the funny wireframe mode.
int index = (si - cdata->_switch_vector.begin());
if (index < get_num_children()) {
CullTraverserData next_data(data, get_child(index));
next_data._state = next_data._state->compose(sw.get_viz_model_state());
trav->traverse(next_data);
CullTraverserData next_data3(data, get_child(index));
next_data3._state = next_data3._state->compose(sw.get_viz_model_state());
trav->traverse(next_data3);
}
}
}
}
// Finally, draw the visible child(ren) in the appropriate state as
// well.
for (int index = 0; index < (int)cdata->_switch_vector.size(); index++) {
if (cdata->_switch_vector[index].in_range_2(dist2)) {
}
}
// Now return false indicating that we have already taken care of
// the traversal from here.
return false;
@ -658,12 +653,17 @@ fillin(DatagramIterator &scan, BamReader *manager) {
////////////////////////////////////////////////////////////////////
void LODNode::Switch::
compute_ring_viz() {
// We render the ring as a series of concentric ring-shaped triangle
// strips, each of which has num_slices quads.
static const int num_slices = 50;
static const int num_rings = 1;
// There are also two more triangle strips, one for the outer edge,
// and one for the inner edge.
static const float edge_ratio = 0.1; // ratio of edge height to diameter.
const GeomVertexFormat *format = GeomVertexFormat::get_v3n3cp();
PT(GeomVertexData) vdata = new GeomVertexData("LOD", format, Geom::UH_static);
PT(GeomVertexData) vdata = new GeomVertexData("LOD_ring", format, Geom::UH_static);
// Fill up the vertex table with all of the vertices.
GeomVertexWriter vertex(vdata, InternalName::get_vertex());
@ -699,12 +699,6 @@ compute_ring_viz() {
float r = (float)ri;
float d = r * (_in - _out) + _out;
// Invert the direction of Z on the outer ring, to invert the
// vertex winding order (and thereby invert the facing of the
// polygons). We want the outer ring to face inward, and the
// inner ring to face outward.
float sign = 1.0f - (ri * 2);
for (si = 0; si < num_slices; ++si) {
float s = (float)si / (float)num_slices;
float t = MathNumbers::pi_f * 2.0f * s;
@ -712,8 +706,8 @@ compute_ring_viz() {
float x = cosf(t);
float y = sinf(t);
vertex.add_data3f(x * d, y * d, 0.5f * edge_ratio * d * sign);
normal.add_data3f(x * sign, y * sign, 0.0f);
vertex.add_data3f(x * d, y * d, 0.5f * edge_ratio * d);
normal.add_data3f(x, y, 0.0f);
color.add_data4f(_show_color);
}
@ -724,8 +718,8 @@ compute_ring_viz() {
float x = cosf(t);
float y = sinf(t);
vertex.add_data3f(x * d, y * d, -0.5f * edge_ratio * d * sign);
normal.add_data3f(x * sign, y * sign, 0.0f);
vertex.add_data3f(x * d, y * d, -0.5f * edge_ratio * d);
normal.add_data3f(x, y, 0.0f);
color.add_data4f(_show_color);
}
}
@ -765,10 +759,91 @@ compute_ring_viz() {
material->set_twoside(true);
material = MaterialPool::get_material(material);
CPT(RenderState) viz_state = RenderState::make(CullFaceAttrib::make(CullFaceAttrib::M_cull_none),
TextureAttrib::make_off(),
MaterialAttrib::make(material),
RenderState::get_max_priority());
CPT(RenderState) viz_state =
RenderState::make(CullFaceAttrib::make(CullFaceAttrib::M_cull_none),
TextureAttrib::make_off(),
ShaderAttrib::make_off(),
MaterialAttrib::make(material),
RenderState::get_max_priority());
if (_show_color[3] != 1.0f) {
viz_state = viz_state->add_attrib(TransparencyAttrib::make(TransparencyAttrib::M_alpha),
RenderState::get_max_priority());
}
geom_node->set_state(viz_state);
_ring_viz = geom_node.p();
}
////////////////////////////////////////////////////////////////////
// Function: LODNode::Switch::compute_spindle_viz
// Access: Private
// Description: Computes a Geom suitable for rendering the LODNode
// spindle in the color of this switch.
////////////////////////////////////////////////////////////////////
void LODNode::Switch::
compute_spindle_viz() {
// We render the spindle as a cylinder, which consists of num_rings
// rings stacked vertically, each of which is a triangle strip of
// num_slices quads. The scale is -10 .. 10 vertically, with a radius
// of 1.0.
static const int num_slices = 10;
static const int num_rings = 10;
const GeomVertexFormat *format = GeomVertexFormat::get_v3n3cp();
PT(GeomVertexData) vdata = new GeomVertexData("LOD_spindle", format, Geom::UH_static);
// Fill up the vertex table with all of the vertices.
GeomVertexWriter vertex(vdata, InternalName::get_vertex());
GeomVertexWriter normal(vdata, InternalName::get_normal());
GeomVertexWriter color(vdata, InternalName::get_color());
int ri, si;
for (ri = 0; ri <= num_rings; ++ri) {
// r is in the range [0.0, 1.0].
float r = (float)ri / (float)num_rings;
// z is in the range [100.0, -100.0]
float z = 100.0f - r * 200.0f;
for (si = 0; si < num_slices; ++si) {
// s is in the range [0.0, 1.0).
float s = (float)si / (float)num_slices;
// t is in the range [0.0, 2pi).
float t = MathNumbers::pi_f * 2.0f * s;
float x = cosf(t);
float y = sinf(t);
vertex.add_data3f(x, y, z);
normal.add_data3f(x, y, 0.0f);
color.add_data4f(_show_color);
}
}
// Now create the triangle strips. One tristrip for each ring.
PT(GeomTristrips) strips = new GeomTristrips(Geom::UH_static);
for (ri = 0; ri < num_rings; ++ri) {
for (si = 0; si < num_slices; ++si) {
strips->add_vertex(ri * num_slices + si);
strips->add_vertex((ri + 1) * num_slices + si);
}
strips->add_vertex(ri * num_slices);
strips->add_vertex((ri + 1) * num_slices);
strips->close_primitive();
}
PT(Geom) spindle_geom = new Geom(vdata);
spindle_geom->add_primitive(strips);
PT(GeomNode) geom_node = new GeomNode("spindle");
geom_node->add_geom(spindle_geom);
CPT(RenderState) viz_state =
RenderState::make(CullFaceAttrib::make(CullFaceAttrib::M_cull_clockwise),
TextureAttrib::make_off(),
ShaderAttrib::make_off(),
RenderState::get_max_priority());
if (_show_color[3] != 1.0f) {
viz_state = viz_state->add_attrib(TransparencyAttrib::make(TransparencyAttrib::M_alpha),
RenderState::get_max_priority());
@ -776,14 +851,26 @@ compute_ring_viz() {
geom_node->set_state(viz_state);
_ring_viz = geom_node.p();
// Also compute a RenderState for rendering the children in
// wireframe mode.
_spindle_viz = geom_node.p();
}
////////////////////////////////////////////////////////////////////
// Function: LODNode::Switch::compute_viz_model_state
// Access: Private
// Description: Computes a RenderState for rendering the children of
// this switch in colored wireframe mode.
////////////////////////////////////////////////////////////////////
void LODNode::Switch::
compute_viz_model_state() {
// The RenderState::make() function only takes up to four attribs at
// once. Since we need more attribs than that, we have to make up
// our state in two steps.
_viz_model_state = RenderState::make(RenderModeAttrib::make(RenderModeAttrib::M_wireframe),
TextureAttrib::make_off(),
ShaderAttrib::make_off(),
ColorAttrib::make_flat(_show_color),
TransparencyAttrib::make(TransparencyAttrib::M_none),
RenderState::get_max_priority());
CPT(RenderState) st2 = RenderState::make(TransparencyAttrib::make(TransparencyAttrib::M_none),
RenderState::get_max_priority());
_viz_model_state = _viz_model_state->compose(st2);
}

6
panda/src/pgraph/lodNode.h
View File

@ -110,13 +110,18 @@ protected:
INLINE void hide();
INLINE PandaNode *get_ring_viz() const;
INLINE PandaNode *get_spindle_viz() const;
INLINE const RenderState *get_viz_model_state() const;
INLINE void write_datagram(Datagram &destination) const;
INLINE void read_datagram(DatagramIterator &source);
private:
INLINE void clear_ring_viz();
void compute_ring_viz();
void compute_spindle_viz();
void compute_viz_model_state();
private:
float _in;
@ -124,6 +129,7 @@ protected:
bool _shown;
Colorf _show_color;
PT(PandaNode) _ring_viz;
PT(PandaNode) _spindle_viz;
CPT(RenderState) _viz_model_state;
};
typedef pvector<Switch> SwitchVector;