Panda3d manual not so helpful

C++ coding using Panda3D
1

It is me again…
I go trough the manual, And I reach the texturing part.

The manual say:

I just found one problem with this:
This is a pyton command! :frowning:

So I tryed again with the TexturePool but my object always white:

PandaFramework framework;
         framework.open_framework(argc, argv);
         framework.set_window_title("yay");
	WindowProperties *props = new WindowProperties();
          props->set_size(400,200);
          //props->set_undecorated(false);
          //props->set_fixed_size(true);
          props->set_origin(100,100);
         WindowFramework *window = framework.open_window(*props,1);
		 
NodePath lepecs =
  window->load_model(framework.get_models(),"lepke.egg");
lepecs.set_pos(-8, 150, -30);
lepecs.set_scale(1 , 1, 1);
//lepecs.set_color(0,0,1,0.5);

PT(Texture) texture;
texture =  TexturePool::load_texture("lepke.png");


lepecs.set_texture(texture);
lepecs.reparent_to(window->get_render());

the inage is exist.
how to put an image onto an object? (and how you know, how to use a function? the reference dont’t give enough information)
(And I still have no idea, how to make a “sprite” too)

And why not change the name of the window border to “yay”?

2

Are you sure that your texture is at the path you ask for it at because you load textures the same as me and it works for me.

3

Oh, I found the problem. You are almost right. The picture is exist, but too big(or my object is too small),
And it have transparent background. :blush:

Thank you.

Now just i have one problem:

Would you tell me, why not/how to change the window title name?
here is my full code:

#include "pandaSystem.h"
#include "pandaFramework.h"
#include "windowProperties.h"
#include "SpriteParticleRenderer.h"
#include "TexturePool.h"
#include "loader.h"

TexturePool*  myTexturePool = TexturePool::get_global_ptr();


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow) {

    int argc = 0;
         char** argv = NULL;
		
		  WindowProperties *props = new WindowProperties();
          props->set_size(400,200);
          //props->set_undecorated(true);
          //props->set_fixed_size(true);
          props->set_origin(100,100);

		 PandaFramework framework;
         framework.open_framework(argc, argv);
         framework.set_window_title("yay");
         WindowFramework *window = framework.open_window(*props,1);		 
NodePath lepecs =
  window->load_model(framework.get_models(),"lepke.egg");
lepecs.set_pos(-8, 150, -30);
lepecs.set_scale(1 , 1, 1);
//lepecs.set_color(0,0,1,0.5);
//myTexture = loader.loadTexture("myTexture.png")
PT(Texture) texture;
texture =  TexturePool::load_texture("blue.jpg");
lepecs.set_texture(texture);
lepecs.reparent_to(window->get_render());
 framework.main_loop();
    // Shut down the engine when done.
		framework.close_framework();
4

The manual has some holes indeed. But usually the Python and C++ ways are the same and the API is very similar (the only thing changing being the use of snake case in C++ rather than lower camel case).

You have two choices to overcome this: you can either use an IDE that allows you to explore an object’s prototype as you type (KDevelop does that, Eclipse does it with Java but I’m not sure for C++ ?).
Or you can spend a little more time on it and check out the C++ reference:
panda3d.org/reference/1.8.1/cxx/annotated

Sometimes it requires to track down the API quite a lot, but most of the time it’s a perfect match.

About renaming a window, you can do it by calling set_window_title(const std::string&) from your PandaFramework instance.

5

Yeah, the Visual c++ 2008 have something similar, it is caled intellisence. I works perfect in c# but in c++ is do almost nothing. But fortunetly I found the c++ translated samples (what is in the installed engine), and I will go trough them.
I usually use the reference, but if something need for something (like texturepool calling and declaration) It not will so helpfull, becaue dont tell a lot of thing about the command.

see my code, I use that in my program, but not change the title, because I make a window properties, and I not defined the title in it:

props->set_title(“yay” );

But thank you for helping.