Changeset 6415

Timestamp:

02/29/08 02:31:56 (11 months ago)

Author:

pgiraud

Message:

add the Quad easing methods for Tween

Files:

• trunk/openlayers/lib/OpenLayers/Tween.js (modified) (1 diff)
• trunk/openlayers/tests/manual/tween.html (modified) (1 diff)

trunk/openlayers/lib/OpenLayers/Tween.js

@@ -269 +269 @@
-    CLASS_NAME: "OpenLayers.Easing.Expo"
-};
+
+/**
+ * Namespace: OpenLayers.Easing.Quad
+ */
+OpenLayers.Easing.Quad = {
+    
+    /**
+     * Function: easeIn
+     * 
+     * Parameters:
+     * t - {Float} time
+     * b - {Float} beginning position
+     * c - {Float} total change
+     * d - {Float} duration of the transition
+     */
+    easeIn: function(t, b, c, d) {
+        return c*(t/=d)*t + b;
+    },
+    
+    /**
+     * Function: easeOut
+     * 
+     * Parameters:
+     * t - {Float} time
+     * b - {Float} beginning position
+     * c - {Float} total change
+     * d - {Float} duration of the transition
+     */
+    easeOut: function(t, b, c, d) {
+        return -c *(t/=d)*(t-2) + b;
+    },
+    
+    /**
+     * Function: easeInOut
+     * 
+     * Parameters:
+     * t - {Float} time
+     * b - {Float} beginning position
+     * c - {Float} total change
+     * d - {Float} duration of the transition
+     */
+    easeInOut: function(t, b, c, d) {
+        if ((t/=d/2) < 1) return c/2*t*t + b;
+        return -c/2 * ((--t)*(t-2) - 1) + b;
+    },
+
+    CLASS_NAME: "OpenLayers.Easing.Quad"
+};

trunk/openlayers/tests/manual/tween.html

@@ -66 +66 @@
-        <option value="Linear">Linear</option>
-        <option value="Expo">Expo</option>
+        <option value="Quad">Quad</option>
-    </select>
-    <select name="easing" id="easing" onchange="changeTween()">