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--- en:orx:reference:object:snippets [2013/05/14 23:50 (13 years ago)] – [orxObject_GetWorldRotation and orxObject_GetRotation] sergeig
+++ en:orx:reference:object:snippets [2018/01/21 02:53 (8 years ago)] (current) – Content moved. Deleted. sausage
@@ Line 1: / Line 1: @@
-====== Object: Code Snippets ======
-===== OrxFrame =====
-===== OrxFX =====
-===== OrxFXPointer =====
-===== OrxObject =====
-==== OrxObject_SetPosition ====
-  orxVECTOR tilePos;
-  orxVector_Set(&tilePos, orx2F(80.0f) * x, orx2F(160.0f), orxFLOAT_0);
-  orxObject_SetPosition(tile, &tilePos);
-  orxVECTOR pos;
-  orxObject_GetPosition(player, &pos);
-  pos.fX = -pos.fX;
-  orxObject_SetPosition(player, &pos);
-==== orxObject_SetRotation ====
-Rotation is set in radians. Zero rad vector is equivalent to (1, 0) vector in screen coordinates. In other words it is a horizontal line pointing from left to right.
-Positive rotation is set in clockwise direction. If vector origin was in the center of the screen, then 1 rad would point to the left right corner of the screen.
-By default object starts with zero rotation angle. Rotation counterclockwise will put the angle into negative range. Rotation clockwise will put the angle into positive range of values.
-==== orxObject_SetAngularVelocity ====
-Set angular velocity changes object rotation value over time. Setting positive value make object rotate clockwise. Negative value sets counterclockwise direction.
-TBD: What's the unit of measure?
-==== orxObject_GetWorldRotation and orxObject_GetRotation ====
-As object rotates continuously clockwise its angle will continue to increase. Thus after a first full circle its angle will be set to 2*Pi. After the second full circle it will be set to 4*Pi. The same is true for confer-clockwise rotation. The 1st full circle will be set to -2*Pi and so on.
-Thus you may have to normalize the rotation value of the object.
-==== orxObject_CreateNeighborList and orxObject_DeleteNeighborList ====
-Use it to obtain objects within the specified bounding box.
-<code c>
-    orxOBJECt *obj; // comes from mouse click event or in some other way
-    orxVECTOR pos, size;
-    orxFLOAT range = 250.;
-    orxOBOX box;
-    orxObject_GetWorldPosition(obj, &pos);
-    orxVector_Set(&size, range, range, 0.);
-    orxOBox_2DSet(&box, &pos, &orxVECTOR_0, &size, 0.);
-    orxBANK *neighbors = orxObject_CreateNeighborList(box);
-    void* cell = orxNULL;
-    while ((cell = orxBank_GetNext(neighbors, cell))) {
-        orxOBJECT **n = cell;
-        orxLOG("object name: %s.", orxObject_GetName(*n));
-    }
-    orxObject_DeleteNeighborList(neighbors);
-</code>
-==== object traversing ====
-[[en:orx:tutorials:community:sergeig:objecttreetraversing|Object Traversing]] has its own page due to somewhat large discussion on the topic.
-===== OrxSpawner =====
-===== OrxStructure =====
-===== OrxTimeLine =====

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