trigger sphere

src/game-lib-component-trigger-sphere-sphere.js

@@ -0,0 +1,71 @@
+//
+// uses the entity position + mesh bounding sphere to check if intersections
+//
+GameLib.D3.ComponentTriggerSphereSphere = function(
+    componentId,
+    sphereRadius,
+    entitiesToCheck,
+    callback
+) {
+    this.componentId = componentId || GameLib.D3.Tools.RandomId();
+    this.parentEntity = null;
+
+    // Todo: this should be executed somewhere in game-lib-z, so that we don't execute it on every construction of an object.
+    GameLib.D3.Utils.Extend(GameLib.D3.ComponentTriggerSphereSphere, GameLib.D3.ComponentInterface);
+
+    this.entitiesToCheck = entitiesToCheck || [];
+    this.sphereRadius = sphereRadius || 1.0;
+    this.callback = callback || null;
+};
+
+if(typeof THREE != "undefined") {
+    ComponentTriggerSphereSphere_spherePosition_Vector3 = new THREE.Vector3();
+    ComponentTriggerSphereSphere_targetBoundingSpherePosition_Vector3 = new THREE.Vector3();
+    ComponentTriggerSphereSphere_targetBoundingSphereRadius = 0.0;
+    ComponentTriggerSphereSphere_sphereToSphere_Vector3 = new THREE.Vector3();
+}
+
+///////////////////////// Methods to override //////////////////////////
+GameLib.D3.ComponentTriggerSphereSphere.prototype.onUpdate = function(
+    deltaTime,
+    parentEntity
+) {
+
+    ComponentTriggerSphereSphere_spherePosition_Vector3.set(
+        parentEntity.position.x,
+        parentEntity.position.y,
+        parentEntity.position.z
+    );
+
+    for(var e in this.entitiesToCheck) {
+        var entityToCheck = this.entitiesToCheck[e];
+
+        ComponentTriggerSphereSphere_targetBoundingSpherePosition_Vector3.set(
+            entityToCheck.position.x,
+            entityToCheck.position.y,
+            entityToCheck.position.z
+        );
+
+        if(entityToCheck.mesh && entityToCheck.mesh.geometry.boundingSphere) {
+            ComponentTriggerSphereSphere_targetBoundingSphereRadius = entityToCheck.mesh.geometry.boundingSphere.radius;
+        } else {
+            ComponentTriggerSphereSphere_targetBoundingSphereRadius = 0.0;
+        }
+
+        // do sphere sphere collision
+
+        ComponentTriggerSphereSphere_sphereToSphere_Vector3.set(
+            ComponentTriggerSphereSphere_targetBoundingSpherePosition_Vector3.x - ComponentTriggerSphereSphere_spherePosition_Vector3.x,
+            ComponentTriggerSphereSphere_targetBoundingSpherePosition_Vector3.y - ComponentTriggerSphereSphere_spherePosition_Vector3.y,
+            ComponentTriggerSphereSphere_targetBoundingSpherePosition_Vector3.z - ComponentTriggerSphereSphere_spherePosition_Vector3.z
+        );
+
+        var length = ComponentTriggerSphereSphere_sphereToSphere_Vector3.length();
+
+        if((length - (ComponentTriggerSphereSphere_targetBoundingSphereRadius + this.sphereRadius)) < 0) {
+            if(this.callback) {
+                this.callback(parentEntity, entityToCheck);
+            }
+        }
+    }
+};