Hello!
I’m working with Panda3d to build a simple FPS. I put in the scene an environment and a camera. I want the camera doens’t travel into environment. Surfing on the web, I find CollisionHandlerPusher class that should stop two object when they intersect. It’s correct?
I don’t understand how to use CollisionHandlerPusher.
Where can i find an example?? possible in c++ please!
thanks!
The Panda3D manual is a good place to start for information about Panda’s collision system. There is also the Roaming Ralph sample program, which was oringinally written in Python, but which also has a C++ version that you can find by searching the forums.
David
I dont’t find the roaming ralph in c++ version:
in this topic [url]Roaming Ralph in C++] the link is broken
I try to do it by myself and i write this code:
#include "pandaFramework.h"
#include "pandaSystem.h"
#include "collisionTraverser.h"
#include "collisionNode.h"
#include "collisionPlane.h"
#include "collisionHandlerPusher.h"
#include "collisionSphere.h"
#include "nodePath.h"
#include "collisionHandlerEvent.h"
#include "plane.h"
#include "lpoint3.h"
#include "lvector3.h"
#include "boundingPlane.h"
#define ACCEL 200
float vel =0;
PandaFramework framework;
AsyncTaskManager* taskMgr = AsyncTaskManager::get_global_ptr();
WindowFramework *window;
NodePath smile;
AsyncTask::DoneStatus rotCamTask(GenericAsyncTask* task, void* data) {
window->get_camera_group().look_at(smile);
return AsyncTask::DS_cont;
}
AsyncTask::DoneStatus moveSmile(GenericAsyncTask* task, void* data) {
vel += ACCEL*task->get_dt();
smile.set_z(smile.get_z() - vel*task->get_dt());
return AsyncTask::DS_cont;
}
int main(int argc, char *argv[]) {
framework.open_framework(argc, argv);
framework.set_window_title("My Panda3D Window");
window = framework.open_window();
CollisionTraverser trav;
trav.show_collisions(window->get_render());
CollisionHandlerPusher* notifier = new CollisionHandlerPusher();
notifier->add_in_pattern("%fn-in-%in");
smile = window->load_model(framework.get_models(), "models/frowney");
smile.reparent_to(window->get_render());
smile.set_pos(0, 0, 10);
CollisionSphere* col_solid = new CollisionSphere(0, 0, 0, 1);
CollisionNode* col_node = new CollisionNode("Sphere");
col_node->add_solid(col_solid);
NodePath col = smile.attach_new_node(col_node);
col.show();
trav.add_collider(col, notifier);
CollisionPlane* col_plane = new CollisionPlane(LPlane(LVector3f(0, 0, 1), LPoint3f(0, 0, 0)));
col_node = new CollisionNode("Floor");
col_node->add_solid(col_plane);
NodePath floor = window->get_render().attach_new_node(col_node);
floor.show();
NodePath cam = window->get_camera_group();
cam.set_pos(0, -10, 4);
cam.look_at(smile);
// Add our task.
taskMgr->add(new GenericAsyncTask("Rotate camera", &rotCamTask, (void*) &smile));
taskMgr->add(new GenericAsyncTask("Move smile", &moveSmile, (void*) &smile));
framework.main_loop();
framework.close_framework();
return (0);
}but when the smile touch the floor, the sphere crosses the plane.
Why?
ok… I write this.
#include "pandaFramework.h"
#include "pandaSystem.h"
#include "collisionTraverser.h"
#include "collisionNode.h"
#include "collisionPlane.h"
#include "collisionHandlerPusher.h"
#include "collisionSphere.h"
#include "nodePath.h"
#include "collisionHandlerEvent.h"
#include "plane.h"
#include "lpoint3.h"
#include "lvector3.h"
#include "boundingPlane.h"
#define ACCEL 9.8
float vel =20;
PandaFramework framework;
AsyncTaskManager* taskMgr = AsyncTaskManager::get_global_ptr();
WindowFramework *window;
NodePath smile;
CollisionTraverser trav;
AsyncTask::DoneStatus rotCamTask(GenericAsyncTask* task, void* data) {
window->get_camera_group().look_at(smile);
return AsyncTask::DS_cont;
}
AsyncTask::DoneStatus moveSmile(GenericAsyncTask* task, void* data) {
trav.traverse(window->get_render());
vel += ACCEL*task->get_dt();
smile.set_z(smile.get_z() - vel*task->get_dt());
return AsyncTask::DS_cont;
}
int main(int argc, char *argv[]) {
framework.open_framework(argc, argv);
framework.set_window_title("My Panda3D Window");
window = framework.open_window();
trav.show_collisions(window->get_render());
CollisionHandlerPusher* notifier = new CollisionHandlerPusher();
notifier->add_in_pattern("%fn-in-%in");
smile = window->load_model(framework.get_models(), "models/frowney");
smile.reparent_to(window->get_render());
smile.set_pos(0, 0, 10);
CollisionSphere* col_solid = new CollisionSphere(0, 0, 0, 1);
CollisionNode* col_node = new CollisionNode("Sphere");
col_node->add_solid(col_solid);
NodePath col = smile.attach_new_node(col_node);
col.show();
trav.add_collider(col, notifier);
NodePath floor = window->load_model(framework.get_models(), "plane");
floor.reparent_to(window->get_render());
floor.set_pos(0, 0, 0);
CollisionPlane* col_plane = new CollisionPlane(LPlane(LVector3f(0, 0, 1), LPoint3f(0, 0, 0)));
col_node = new CollisionNode("Floor");
col_node->add_solid(col_plane);
floor = floor.attach_new_node(col_node);
floor.show();
NodePath cam = window->get_camera_group();
cam.set_pos(0, -10, 4);
cam.look_at(smile);
// Add our task.
taskMgr->add(new GenericAsyncTask("Rotate camera", &rotCamTask, (void*) &smile));
taskMgr->add(new GenericAsyncTask("Move smile", &moveSmile, (void*) &smile));
framework.main_loop();
framework.close_framework();
return (0);
}but when the smile touch the plane, in the terminal it shows this message:
:collide(error): CollisionHandlerPusher doesn't know about render/frowney.egg/Sphere, disabling.Why?