Memory leak

C++ coding using Panda3D
5

You will not believe the code from the textbook has a memory leak. :open_mouth:

#include "pandaFramework.h"
#include "pandaSystem.h"
 
int main(int argc, char *argv[]) {
    //open a new window framework
  PandaFramework framework;
  framework.open_framework(argc, argv);
    //set the window title to My Panda3D Window
  framework.set_window_title("My Panda3D Window");
    //open the window
  WindowFramework *window = framework.open_window();
 
  //here is room for your own code
 
    //do the main loop, equal to run() in python
  framework.main_loop();
    //close the window framework
  framework.close_framework();
  return (0);
}

However, if I supplement my code, it’s OK.

Example:

#include "pandaFramework.h"
#include "pandaSystem.h"
#include "geomTristrips.h"

void CubeToSphere (LVector3f&vPosition){

    float x2 = vPosition[0] * vPosition[0] ;
    float y2 = vPosition[1] * vPosition[1] ;
    float z2 = vPosition[2] * vPosition[2];

    vPosition[0] = vPosition[0] * sqrt( 1.0f - ( y2 * 0.5f ) - ( z2 * 0.5f ) + ( (y2 * z2) / 3.0f ) );
    vPosition[1] = vPosition[1] * sqrt( 1.0f - ( z2 * 0.5f ) - ( x2 * 0.5f ) + ( (z2 * x2) / 3.0f ) );
    vPosition[2] = vPosition[2] * sqrt( 1.0f - ( x2 * 0.5f ) - ( y2 * 0.5f ) + ( (x2 * y2) / 3.0f ) );
}

int main(int argc, char *argv[]) {
PandaFramework framework;
framework.open_framework(argc, argv);
framework.set_window_title("My Panda3D");
WindowFramework *window = framework.open_window();
window->setup_trackball();

PT(GeomVertexData) vdata;
vdata = new GeomVertexData("ProceduralMesh", GeomVertexFormat::get_v3(), Geom::UH_static);

vdata->set_num_rows(4);

GeomVertexWriter vertex; vertex = GeomVertexWriter(vdata, "vertex");

PT(GeomTristrips) prim;
prim = new GeomTristrips(Geom::UH_static);

int height  = 2;
int width  =  2;
float  radius = 3.0;

LVector3f vMinPosition(-1.0f, -1.0f, 0.0f );

int index = 0;

for ( int  y  =  0;  y < height; ++y){
    for ( int  x  = 0;  x < width;  ++x ){

        LVector3f vPosition = vMinPosition;

        vPosition[0] += (float)x / (float)(width-1)* 2.0f;
        vPosition[1] +=- (float)y / (float)(height-1)* 2.0f;

        vertex.add_data3f(vPosition);

        prim->add_vertex( index);

        if ( index ==  3){
            prim->close_primitive();
            index = 0;
        }

       ++ index ;

        }
}

PT(Geom) geom;
geom = new Geom(vdata);
geom->add_primitive(prim);

PT(GeomNode) node;
node = new GeomNode("gnode");
node->add_geom(geom);

NodePath nodePath = window->get_render().attach_new_node(node);

framework.main_loop();
framework.close_framework();
return (0);
}

No Leaks :laughing: