Orx Learning - en:examples:objects
https://orx-project.org/wiki/
2026-04-04T21:57:16+00:00Orx Learning
https://orx-project.org/wiki/
https://orx-project.org/wiki/_media/favicon.icotext/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Coloring an Object
https://orx-project.org/wiki/en/examples/objects/coloring_an_object?rev=1759253179&do=diff
Coloring an Object
orxVECTOR colorVec;
colorVec.fX = 1.0; //full red
colorVec.fY = 0.5; //half green
colorVec.fZ = 0; //no blue = orange
orxCOLOR color;
color.vRGB = colorVec;
color.fAlpha = orxFLOAT_1; //set alpha (required) to stop your object from becoming fully transparent.
orxObject_SetColor(MyObject, &color);text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Comparing Strings
https://orx-project.org/wiki/en/examples/objects/comparing_strings?rev=1759253179&do=diff
Comparing Strings
Code
if (orxString_Compare("String One", "String Two") == 0) {
// is the same
} else {
// is not the same
}
int value = orxString_Compare("aa", "ab"); //value is -1 (smaller)
int value2 = orxString_Compare("ab", "aa"); //value2 is 1 (larger)text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Concatenating two orxSTRINGs
https://orx-project.org/wiki/en/examples/objects/concatenating_two_strings?rev=1759253179&do=diff
Concatenating two orxSTRINGs
#include "orx.h"
#ifdef __orxMSVC__
#include "malloc.h"
#endif
...
const orxSTRING stringOne = "I like the beach. ";
const orxSTRING stringTwo = "And I like the waves.";
int length = orxString_GetLength(stringOne) + orxString_GetLength(stringTwo) + 1;
#ifdef __orxMSVC__
orxCHAR *concatenatedString = (orxCHAR *)alloca(length * sizeof(orxCHAR));
#else /* __orxMSVC__ */
orxCHAR concatenatedString[length] = {};
#endif /* __orxMSVC__ */
orxString_NPrint(concat…text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Getting the total count of all Objects
https://orx-project.org/wiki/en/examples/objects/counting_all_objects?rev=1759253179&do=diff
Getting the total count of all Objects
This function will return the total count of all current objects.
Code
orxU32 totalObjectsCount = orxStructure_GetCounter(orxSTRUCTURE_ID_OBJECT);
Counts of other structure types can also be called. See: orxSTRUCTURE_ID in the APItext/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Counting Objects by Name
https://orx-project.org/wiki/en/examples/objects/counting_objects_by_name?rev=1759253179&do=diff
Counting Objects by Name
How to get a count of all objects with a particular name. In this case, both the ship and invader carry a bullet. This example counts all the BulletObjects.
Assets
Code
int bulletObjectCount = 0;
orxSTRUCTURE *objectToCheck = orxStructure_GetFirst(orxSTRUCTURE_ID_OBJECT);
while (objectToCheck != orxNULL){
const orxSTRING name = orxObject_GetName(orxOBJECT(objectToCheck));
if (orxString_Compare(name, "BulletObject") == 0){
bulletObjectCount++;
…text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Create Object
https://orx-project.org/wiki/en/examples/objects/create_object?rev=1759253179&do=diff
Create Object
Code
orxOBJECT *heroObject = orxObject_CreateFromConfig("HeroObject");
Config
[HeroObject]
Graphic = HeroGraphic
Position = (320, 200, 0)
[HeroGraphic]
Texture = hero.pngtext/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Getting a Child Object by Name from a Parent Object
https://orx-project.org/wiki/en/examples/objects/get_child_object_by_name?rev=1759253179&do=diff
Getting a Child Object by Name from a Parent Object
Orx provides a pair of functions for finding objects in an object hierarchy by name. The two functions are orxObject_FindChild and orxObject_FindOwnedChild. These functions will filter out any camera or spawner and retrieve the child matching the provided path.text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Get OrxObject by Traversing Structures
https://orx-project.org/wiki/en/examples/objects/get_object_by_traversing_structures?rev=1759253179&do=diff
Get OrxObject by Traversing Structures
orxSTRUCTURE *structure = orxStructure_GetFirst(orxSTRUCTURE_ID_OBJECT);
while (structure != orxNULL){
orxOBJECT *object = orxOBJECT(structure);
const orxSTRING objectName = orxObject_GetName(object);
orxSTRUCTURE *nextStructure = orxStructure_GetNext(structure);
if (orxString_Compare(objectName , "SomeObjectName") == 0){
orxObject_SetLifeTime(orxOBJECT(structure), orx2F(0.0));
}
structure = nextStructure;
}text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Get the Name of an Object
https://orx-project.org/wiki/en/examples/objects/get_object_name?rev=1759253179&do=diff
Get the Name of an Object
const orxSTRING name = orxTexture_GetName(SomeObject);text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Keep an Object facing the Mouse Position
https://orx-project.org/wiki/en/examples/objects/keep_object_facing_mouse?rev=1759253179&do=diff
Keep an Object facing the Mouse Position
Good for weapons that fire in the direction of the mouse
Resource
Config
[Arrow]
Graphic = @
Texture = arrow.png
Pivot = center
Position = (0, 0, 0)
Code
orxVECTOR arrowPosition = orxVECTOR_0;
orxObject_GetPosition(arrow, &arrowPosition);
orxVECTOR mousePosition = orxVECTOR_0;
orxMouse_GetPosition(&mousePosition);
orxRender_GetWorldPosition(&mousePosition, orxNULL, &mousePosition);
orxVECTOR direction = orxV…text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Having a Parent Object die after all children have died
https://orx-project.org/wiki/en/examples/objects/kill_parent_object_when_children_die?rev=1759253179&do=diff
Having a Parent Object die after all children have died
This example shows children with a random lifetime, and the parent dying only after all children have expired.
Config
[WarningObject]
Position = (0, 0, -0.2)
ChildList = FlashingTopObject # IconObject # WarningTextObject
LifeTime = childtext/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Non-rotating Child Objects
https://orx-project.org/wiki/en/examples/objects/non_rotating_children?rev=1759253179&do=diff
Non-rotating Child Objects
For attaching children whose position follows the parent's rotation, but the child's direction vector does not change.
Assets
Code
orxObject_CreateFromConfig("BossObject");
Config
[BossObject]
Graphic = BossGraphic
Position = (400, 300, -0.1)
ChildList = Gun1 # Gun2 # Gun3 # Gun4
Smoothing = true
AngularVelocity = 36
[BossGraphic]
Texture = boss.png
Pivot = center
[Gun1@GunObject]
Position = (-55, -55, -0.1)
Rotation = -45
[Gun2@GunObject]
Position = (55…text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Convert a Number to a String
https://orx-project.org/wiki/en/examples/objects/number_to_string?rev=1759253179&do=diff
Convert a Number to a String
orxS32 score = 1234;
orxCHAR formattedScore[6] = {};
orxString_NPrint(formattedScore, sizeof(formattedScore) - 1, "%d", score);text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Get and Set Rotation on an Object
https://orx-project.org/wiki/en/examples/objects/object_get_set_rotation?rev=1759253179&do=diff
Get and Set Rotation on an Object
orxOBJECT *heroObject = orxObject_CreateFromConfig("HeroObject");
orxFLOAT rotation = orxObject_GetRotation(heroObject);
rotation += 10;
orxObject_SetRotation(heroObject, rotation);text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Object with Children
https://orx-project.org/wiki/en/examples/objects/object_with_children?rev=1759253179&do=diff
Object with Children
Code
orxOBJECT *heroObject = orxObject_CreateFromConfig("HeroObject");
Config
[HeroObject]
Graphic = HeroGraphic
Position = (320, 200, 0)
ChildList = HeroChildObject
[HeroChildObject]
Graphic = HeroGraphic
Position = (20, 20, 0)
[HeroGraphic]
Texture = hero.pngtext/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Object shadow using a child
https://orx-project.org/wiki/en/examples/objects/object_with_shadow?rev=1759253179&do=diff
Object shadow using a child
Assets
Code
orxObject_CreateFromConfig("CannonObject");
Config
[CannonObject]
Graphic = CannonGraphic
Smoothing = true
Position = (-80, -80, -0.1)
AngularVelocity = 100
ChildList = CannonShadow
[CannonGraphic]
Texture = cannon.png
Pivot = (18.5, 26, 0)
[CannonShadow]
Graphic = CannonShadowGraphic
Position = (-20, 20, 0)
IgnoreFromParent = position.rotation
[CannonShadowGraphic]
Texture = cannon-shadow.png
Pi…text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Get a string in a string
https://orx-project.org/wiki/en/examples/objects/string_in_string?rev=1759253179&do=diff
Get a string in a string
orxSTRING alphabet = (orxCHAR*)"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
orxU32 size = 3, pos = 4;
orxCHAR buffer[64];
orxString_NPrint(buffer, sizeof(buffer), "%.3s", alphabet + pos);
buffer contains “EFG”.text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Turning or Steering
https://orx-project.org/wiki/en/examples/objects/turning_or_steering?rev=1759253179&do=diff
Turning or Steering
Good for vehicle steering or turning ships and planes.
Code
car = orxObject_CreateFromConfig("CarObject");
...
if(orxInput_IsActive("Right")){
orxFLOAT rotation = orxObject_GetRotation(car);
orxVECTOR relativeSpeed = orxVECTOR_0;
orxObject_GetRelativeSpeed(car, &relativeSpeed);
rotation += 0.01;
orxObject_SetRotation(car, rotation);
orxObject_SetRelativeSpeed(car, &relativeSpeed); //reapply the relative speed.
}text/html2025-09-30T17:26:19+00:00Anonymous (anonymous@undisclosed.example.com)Turning or Steering (method 2)
https://orx-project.org/wiki/en/examples/objects/turning_or_steering_2?rev=1759253179&do=diff
Turning or Steering (method 2)
Good for vehicle steering or turning ships and planes. Doesn't use relative speed so functions are faster, and the seperate rotation and speed are handy for drifting effects.
Code
car = orxObject_CreateFromConfig("CarObject");
...
if(orxInput_IsActive("Right")){
orxFLOAT rotation = orxObject_GetRotation(car);
orxVECTOR speed;
orxObject_GetSpeed(car, &speed);
rotation += 0.01;
orxVector_2DRotate(&speed, &speed, 0.01);
orxObject_SetRotation(car, r…