I have Board class:
struct Cell
{
cocos2d::Sprite* sprite;
int status;
};
class Board
{
public:
Cell* cells[5][5];
...
};
In .cpp file, I call:
cells[i][j]->sprite = Sprite::create("abc.png");
but error runtime.
Please tell me why?
After creating Sprite you have to retain it if you are not adding it to Layer in function where you have create otherwise it will be released after function call.
you should use like
cells[i][j]->sprite = Sprite::create("abc.png");
sprite->retain();
in destructor release it:
cells[i][j]->sprite->release();
Related
The purpose of the code is to
make a prefab of "Normal" and "Virus"
make them move in random directions
when they collide, change "Normal" into "Virus" Prefabs
However, I've got stucked on step 2.
I successfuly made "Normal" and "Virus" Prefabs get spawned at random places.
Btw, I have no idea what I should do to supply transform function to Prefabs.
Also, what codes should I use to replace "Normal" Prefabs into "Virus" Prefabs if they collide each other?
These are the codes and pics I used
using UnityEngine;
public class VirusSpawner : MonoBehaviour
{
[SerializeField]
private int objectSpawnCount = 5;
[SerializeField]
private GameObject[] prefabArray;
private void Awake()
{
for (int i = 0; i < objectSpawnCount; ++i)
{
int index = Random.Range(0, prefabArray.Length);
float x = Random.Range(-3, 3);
float y = Random.Range(-4, 4);
Vector3 position = new Vector3(x, y, 0);
Instantiate(prefabArray[index], position, Quaternion.identity);
}
}
}
As I understood what you need is a script for your objects, responsible for moving them and controlling all this "Normal" and "Virus" states.
2.1. Create a C# Script (i.e. "Virus") that moves the object as soon as it exists.
2.2. Right after instantiating your prefabs add this script to it:
GameObject newGO = Instantiate(prefabArray[index], position, Quaternion.identity);
newGO.AddComponent<Virus>();
On the new "Virus" script, add the collision detection and variable that holds the state of Normal or Virus
As #Caio Rocha said you can instantiate new Virus Object and add component to it but there can be one more way which can be faster :
Create a Empty Game Object.
Add both (Virus and Normal) prefabs as children of that prefab and drag and drop to project window to create new Prefab.
Attach this script to Parent:
public class ParentObject : MonoBehaviour
{
public GameObject VirusObject;
public GameObject NormalObject;
private bool isVirus;
private void Awake()
{
isVirus = (Random.Range(0, 2) == 1); //Randomly Make an object
//virus or normal on instantiation
if (isVirus)
{
TurnToVirus();
}
else
{
TurntoNormal();
}
}
private void OnCollisionEnter(Collision other)
{
ParentObject coll =
other.collider.gameObject.GetComponent<ParentObject>();
if (coll && coll.isVirus) //if other object is virus
{
TurnToVirus();
}
}
private void TurnToVirus()
{
VirusObject.SetActive(true);
NormalObject.SetActive(false);
}
private void TurntoNormal()
{
VirusObject.SetActive(false);
NormalObject.SetActive(true);
}
}
Now Inside prefab array move this Parent prefab instead of your own prefabs and it will randomly create normal and virus objects and when they interact normal turn to viruses. Make sure this script and collider is now on parent. This is much optimized over adding component individually just for single check.
I am facing problem while running gtest for the following code sample.
ignore header includes as its compilable and running fine.
Error:
GMOCK WARNING:
Uninteresting mock function call - returning default value.
Function call: receive(0x7ffcee4fc990, 0x7ffcee4fc900)
Returns: 0
NOTE: You can safely ignore the above warning unless this call should not happen. Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call. See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
/data/home/sipadhy/unit_test_research/gTest/ImplClassTest.cpp:174: Failure
Actual function call count doesn't match EXPECT_CALL(mockImplClass, receive(_, _))...
Expected: to be called at least once
Actual: never called - unsatisfied and active
Sample Code:
// Main Class where function to be mocked
class ImplClass
{
public:
virtual int receive(structX* x, structY* y){ // some logic }
};
// An intermidiate class which calls the main class
class IntermidiateClass
{
std::shared_ptr<ImplClass> implClassPtr = nullptr;
public:
setImplClassptr(std::shared_ptr<ImplClass> ptr)
{
implClassPtr = ptr;
}
int getValue()
{
structX x;
structY y;
return(implClassPtr->receive(x, y));
}
};
// Mock Class
class MockImplClass: public ImplClass
{
public:
MOCK_METHOD2(receive, int(structX, structY));
}
// Test case
TEST(MyTest, TEST1)
{
MockImplClass mockImplClass;
IntermidiateClass intermidiateObj;
intermidiateObj.setImplClassptr(std::make_shared<MockImplClass>());
EXPECT_CALL(mockImplClass, receive(_, _))
.Times(AtLeast(1))
.WillRepeatedly(Return(1));
int retVal = intermidiateObj.getValue();
}
Thanks,
Siva
You create a brand new object of the MockImplClass class here:
std::make_shared<MockImplClass>()
Thus your first created object
MockImplClass mockImplClass;
never gets used to call receive()
Please excuse me I'm a complete novice at all this but I'm trying to make a game following "Brackeys How To Make A Video Game" I'm on video 8 if that helps. I can't seem to find what i have done wrong i have added my scripts for "player movement", "player collision" and "game manager". Please if there is anything else you need to help me please ask i really don't want to give up just yet was really enjoying doing this.
Thank you all
using UnityEngine;
public class PlayerMovement : MonoBehaviour {
// This is a reference to the Rigidbody component called "rb"
public Rigidbody rb;
public float forwardForce = 2000f; // Variable that determines the forward force
public float sidewaysForce = 500f; // Variable that determines the sideways force
// We marked this as "Fixed"Update because we
// are using it to mess with physics.
void FixedUpdate ()
{
// Add a forward force
rb.AddForce(0, 0, forwardForce * Time.deltaTime);
if (Input.GetKey("d")) // If the player is pressing the "d" key
{
// Add a force to the right
rb.AddForce(sidewaysForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
}
if (Input.GetKey("a")) // If the player is pressing the "a" key
{
// Add a force to the left
rb.AddForce(-sidewaysForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
}
if (rb.position.y < -1f)
{
FindObjectOfType<GameManager>().EndGame();
}
}
}
using UnityEngine;
public class PlayerCollision : MonoBehaviour {
public PlayerMovement movement; // A reference to our PlayerMovement script
// This function runs when we hit another object.
// We get information about the collision and call it "collisionInfo".
void OnCollisionEnter (Collision collisionInfo)
{
// We check if the object we collided with has a tag called "Obstacle".
if (collisionInfo.collider.tag == "Obstacle")
{
movement.enabled = false; // Disable the players movement.
FindObjectOfType<GameManager>().EndGame();
}
}
}
using UnityEngine;
using UnityEngine.SceneManagement;
public class GameManager : MonoBehaviour {
bool gameHasEnded = false;
public float restartDelay = 1f;
public GameObject completeLevelUI;
public void CompleteLevel ()
{
completeLevelUI.SetActive(true);
}
public void EndGame ()
{
if (gameHasEnded == false)
{
gameHasEnded = true;
Debug.Log("GAME OVER");
Invoke("Restart", restartDelay);
}
}
void Restart ()
{
SceneManager.LoadScene(SceneManager.GetActiveScene().name);
}
}
when i fall off ground:
NullReferenceException: Object reference not set to an instance of an object
PlayerMovement.FixedUpdate () (at Assets/Scripts/PlayerMovement.cs:32)
when i hit an obstacle:
NullReferenceException: Object reference not set to an instance of an object
PlayerCollision.OnCollisionEnter (UnityEngine.Collision collisionInfo) (at Assets/Scripts/PlayerCollision.cs:15)
It seems to me that FindObjectOfType<GameManager>() is returning null, which is causing a null reference exception when you attempt to call the EndGame function. This most likely means that there is no object in your scene with the GameManager component on it. The solution to this problem is simple:
Create an empty object in your scene and add the GameManager component to it. This will fix the error in this instance, but it could happen in the future if you're not careful. It is also a good idea to check if you found an object or not before calling functions on it:
GameManager gm = FindObjectOfType<GameManager>();
if (gm != null)
{
gm.EndGame();
}
I'm trying to follow the tutorial about Watchfaces creation, but I'm stuck.
I copied the code from the wiki so there shouldn't be any error whatsoever, but I'm getting this error while compiling
error: implicit declaration of function 'PBL_IF_ROUND_ELSE' [-Werror=implicit-function-declaration]
I tried to google it but I couldn't find anything useful.
This is the code
#include <pebble.h>
static Window *s_main_window;
static TextLayer *s_time_layer;
static void update_time() {
// Get a tm structure
time_t temp = time(NULL);
struct tm *tick_time = localtime(&temp);
// Write the current hours and minutes into a buffer
static char s_buffer[8];
strftime(s_buffer, sizeof(s_buffer), clock_is_24h_style() ? "%H:%M" : "%I:%M", tick_time);
// Display this time on the TextLayer
text_layer_set_text(s_time_layer, s_buffer);
}
static void tick_handler(struct tm *tick_time, TimeUnits units_changed) {
update_time();
}
static void main_window_load(Window *window) {
// Get information about the Window
Layer *window_layer = window_get_root_layer(window);
GRect bounds = layer_get_bounds(window_layer);
// Create the TextLayer with specific bounds
s_time_layer = text_layer_create(
GRect(0, PBL_IF_ROUND_ELSE(58, 52), bounds.size.w, 50));
// Improve the layout to be more like a watchface
text_layer_set_background_color(s_time_layer, GColorClear);
text_layer_set_text_color(s_time_layer, GColorBlack);
text_layer_set_text(s_time_layer, "00:00");
text_layer_set_font(s_time_layer, fonts_get_system_font(FONT_KEY_BITHAM_42_BOLD));
text_layer_set_text_alignment(s_time_layer, GTextAlignmentCenter);
// Add it as a child layer to the Window's root layer
layer_add_child(window_layer, text_layer_get_layer(s_time_layer));
}
static void main_window_unload(Window *window) {
// Destroy TextLayer
text_layer_destroy(s_time_layer);
}
static void init() {
// Create main Window element and assign to pointer
s_main_window = window_create();
// Set handlers to manage the elements inside the Window
window_set_window_handlers(s_main_window, (WindowHandlers) {
.load = main_window_load,
.unload = main_window_unload
});
// Show the Window on the watch, with animated=true
window_stack_push(s_main_window, true);
// Make sure the time is displayed from the start
update_time();
// Register with TickTimerService
tick_timer_service_subscribe(MINUTE_UNIT, tick_handler);
}
static void deinit() {
// Destroy Window
window_destroy(s_main_window);
}
int main(void) {
init();
app_event_loop();
deinit();
}
I'm using the CloudPebble SDK.
I got it, PBL_IF_ROUND_ELSE works only with 3.X SDK (I was using the 2.X).
"PBL_IF_ROUND_ELSE(58, 52)" Only works with Pebble Time or SDK3.
You can replace "PBL_IF_ROUND_ELSE(58, 52)" with a range between 0 and 100. 0 meaning it will be at the top of the screen. 100 means it will be at the bottom of the screen.
Replace the "PBL_IF_ROUND_ELSE(58, 52)" with a 0. That should do the trick. Im assuming you are trying to run this program on the aplite version?
So I'm making a zombie shooter game that works well, but after running for a while I get hit with this exception:
Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException:
Couldn't load file: 1zom3.png
at com.badlogic.gdx.graphics.Pixmap.<init>(Pixmap.java:140)
at com.badlogic.gdx.graphics.TextureData$Factory.loadFromFile(TextureData.java:98)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:100)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:92)
at com.lastride.game.Entity.changeState(Entity.java:51)
at com.lastride.game.Enemy.seek(Enemy.java:39)
at com.lastride.game.LastRideGame.update(LastRideGame.java:149)
at com.lastride.game.LastRideGame.render(LastRideGame.java:229)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:215)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:120)
Caused by: java.io.IOException: Error loading pixmap:
at com.badlogic.gdx.graphics.g2d.Gdx2DPixmap.<init>(Gdx2DPixmap.java:57)
at com.badlogic.gdx.graphics.Pixmap.<init>(Pixmap.java:138)
... 9 more
I know for a fact that the image is there as it works, but it seems that after running for a bit it crashes.
This is the method where it crashes on:
public void changeState(int i)
{
//changes the state and concurrently the image associated with the given state
state = i;
sprite = new Sprite(new Texture(Gdx.files.internal(name+i+suff)));//crashes here
bounding = (sprite.getBoundingRectangle());
if (sprite.getTexture().getTextureData().isPrepared()==false)
{
sprite.getTexture().getTextureData().prepare();
}
playerMap = sprite.getTexture().getTextureData().consumePixmap();
}
As #Tenfour04 points out, it could be an out-of-memory problem.
Instead of doing this:
sprite = new Sprite(new Texture(Gdx.files.internal(name+i+suff)));
Create an global (and/or possible static and/or possible final) Texture object, and load it just once at the beginning of your game and use it repeatably.
Something like this:
public static Texture myTexture_1; //<< your texture
public static final int ID_MY_TEXTURE_1 = 1; //<< this will work as an ID
// This method is called once in your game (like in the create() method)...
public static void load() {
myTexture_1 = new Texture(Gdx.files.internal(name + ID_MY_TEXTURE_1 + suff));
}
// when no longer necessary, remove it...
public static void dispose() {
myTexture_1.dispose();
// and so on...
}
then, in your changeState() method, do a switch to retrieve the correct texture:
public void changeState(int i) {
state = i;
switch(i){
case ID_MY_TEXTURE_1 :
sprite = new Sprite(myTexture_1);
break;
// rest of cases...
}
// rest of your code...
}