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cleaner interface to minmax and transform

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This commit is contained in:
David Rose 2003-02-02 20:40:26 +00:00
parent 5b7526d3a0
commit a31dba7522
2 changed files with 91 additions and 61 deletions
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117
panda/src/gobj/geom.cxx
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@ -16,23 +16,19 @@
//
////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////
// Includes
////////////////////////////////////////////////////////////////////
#include "geom.h"
#include "config_gobj.h"
#include <graphicsStateGuardianBase.h>
#include <geometricBoundingVolume.h>
#include <datagram.h>
#include <datagramIterator.h>
#include <bamReader.h>
#include <bamWriter.h>
#include <ioPtaDatagramShort.h>
#include <ioPtaDatagramInt.h>
#include <ioPtaDatagramLinMath.h>
#include <indent.h>
#include "graphicsStateGuardianBase.h"
#include "geometricBoundingVolume.h"
#include "datagram.h"
#include "datagramIterator.h"
#include "bamReader.h"
#include "bamWriter.h"
#include "ioPtaDatagramShort.h"
#include "ioPtaDatagramInt.h"
#include "ioPtaDatagramLinMath.h"
#include "indent.h"
////////////////////////////////////////////////////////////////////
// Static variables
@ -202,6 +198,70 @@ operator = (const Geom &copy) {
make_dirty();
}
////////////////////////////////////////////////////////////////////
// Function: Geom::calc_tight_bounds
// Access: Public
// Description: Expands min_point and max_point to include all of the
// vertices in the Geom, if any. found_any is set true
// if any points are found. It is the caller's
// responsibility to initialize min_point, max_point,
// and found_any before calling this function.
////////////////////////////////////////////////////////////////////
void Geom::
calc_tight_bounds(LPoint3f &min_point, LPoint3f &max_point,
bool &found_any) const {
Geom::VertexIterator vi = make_vertex_iterator();
int num_prims = get_num_prims();
for (int p = 0; p < num_prims; p++) {
int length = get_length(p);
for (int v = 0; v < length; v++) {
Vertexf vertex = get_next_vertex(vi);
if (found_any) {
min_point.set(min(min_point[0], vertex[0]),
min(min_point[1], vertex[1]),
min(min_point[2], vertex[2]));
max_point.set(max(max_point[0], vertex[0]),
max(max_point[1], vertex[1]),
max(max_point[2], vertex[2]));
} else {
min_point = vertex;
max_point = vertex;
found_any = true;
}
}
}
}
////////////////////////////////////////////////////////////////////
// Function: Geom::transform_vertices
// Access: Public
// Description: Applies the indicated transform to all of the
// vertices in the Geom. If the Geom happens to share a
// vertex table with another Geom, this operation will
// duplicate the vertex table instead of breaking the
// other Geom; however, if multiple Geoms with shared
// tables are transformed by the same matrix, they will
// no longer share tables after the operation. Consider
// using the GeomTransformer if you will be applying the
// same transform to multiple Geoms.
////////////////////////////////////////////////////////////////////
void Geom::
transform_vertices(const LMatrix4f &mat) {
PTA_Vertexf coords;
PTA_ushort index;
get_coords(coords, index);
PTA_Vertexf new_coords;
new_coords.reserve(coords.size());
PTA_Vertexf::const_iterator vi;
for (vi = coords.begin(); vi != coords.end(); ++vi) {
new_coords.push_back((*vi) * mat);
}
nassertv(new_coords.size() == coords.size());
set_coords(new_coords, index);
}
////////////////////////////////////////////////////////////////////
// Function: Geom::set_coords
// Access: Public
@ -899,32 +959,3 @@ write_verbose(ostream &out, int indent_level) const {
describe_attr(out, this, bind_normals, g_normals, true, indent_level + 2);
}
}
////////////////////////////////////////////////////////////////////
// Function: Geom::get_min_max
// Access: Public
// Description: Expands min and max, if necessary, to include the
// complete bounding rectangle that encloses all the
// vertices.
////////////////////////////////////////////////////////////////////
void Geom::
get_min_max(Vertexf &min, Vertexf &max) const {
int numv = _coords.size();
for (int i = 0; i < numv; i++) {
if (_coords[i][0] < min[0])
min[0] = _coords[i][0];
else if (_coords[i][0] > max[0])
max[0] = _coords[i][0];
if (_coords[i][1] < min[1])
min[1] = _coords[i][1];
else if (_coords[i][1] > max[1])
max[1] = _coords[i][1];
if (_coords[i][2] < min[2])
min[2] = _coords[i][2];
else if (_coords[i][2] > max[2])
max[2] = _coords[i][2];
}
}

35
panda/src/gobj/geom.h
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@ -17,25 +17,22 @@
////////////////////////////////////////////////////////////////////
#ifndef GEOM_H
#define GEOM_H
//
////////////////////////////////////////////////////////////////////
// Includes
////////////////////////////////////////////////////////////////////
#include <pandabase.h>
#include "pandabase.h"
#include "drawable.h"
#include <vector_typedWritable.h>
#include <pointerTo.h>
#include <pointerToArray.h>
#include <typedef.h>
#include <luse.h>
#include <pta_Vertexf.h>
#include <pta_Normalf.h>
#include <pta_Colorf.h>
#include <pta_TexCoordf.h>
#include <pta_ushort.h>
#include <pta_int.h>
#include "vector_typedWritable.h"
#include "pointerTo.h"
#include "pointerToArray.h"
#include "typedef.h"
#include "luse.h"
#include "pta_Vertexf.h"
#include "pta_Normalf.h"
#include "pta_Colorf.h"
#include "pta_TexCoordf.h"
#include "pta_ushort.h"
#include "pta_int.h"
#include "texture.h"
class Datagram;
@ -137,8 +134,10 @@ public:
virtual void print_draw_immediate() const = 0;
public:
void get_min_max(Vertexf &min, Vertexf &max) const;
void calc_tight_bounds(LPoint3f &min_point, LPoint3f &max_point,
bool &found_any) const;
void transform_vertices(const LMatrix4f &mat);
void set_coords(const PTA_Vertexf &coords,
const PTA_ushort &vindex =