Big rename part 1: 'action' to 'input'.

[enjoyable.git] / NJInputAnalog.m

diff --git a/NJInputAnalog.m b/NJInputAnalog.m
new file mode 100644 (file)
index 0000000..98ed018
--- /dev/null
+++ b/NJInputAnalog.m
@@ -0,0 +1,53 @@
+//
+//  NJInputAnalog.m
+//  Enjoy
+//
+//  Created by Sam McCall on 5/05/09.
+//
+
+#define DEAD_ZONE 0.3
+
+#import "NJInputAnalog.h"
+
+static float normalize(long p, long min, long max) {
+    return 2 * (p - min) / (float)(max - min) - 1;
+}
+
+@implementation NJInputAnalog {
+    float magnitude;
+    long rawMin;
+    long rawMax;
+}
+
+- (id)initWithIndex:(int)index rawMin:(long)rawMin_ rawMax:(long)rawMax_ {
+    if ((self = [super init])) {
+        self.name = [[NSString alloc] initWithFormat: @"Axis %d", index];
+        self.children = @[[[NJInput alloc] initWithName:@"Low" base:self],
+                          [[NJInput alloc] initWithName:@"High" base:self]];
+        rawMax = rawMax_;
+        rawMin = rawMin_;
+    }
+    return self;
+}
+
+- (id)findSubInputForValue:(IOHIDValueRef)value {
+    float mag = normalize(IOHIDValueGetIntegerValue(value), rawMin, rawMax);
+    if (mag < -DEAD_ZONE)
+        return self.children[0];
+    else if (mag > DEAD_ZONE)
+        return self.children[1];
+    else
+        return nil;
+}
+
+- (void)notifyEvent:(IOHIDValueRef)value {
+    magnitude = normalize(IOHIDValueGetIntegerValue(value), rawMin, rawMax);
+    [self.children[0] setActive:magnitude < -DEAD_ZONE];
+    [self.children[1] setActive:magnitude > DEAD_ZONE];
+}
+
+- (float)magnitude {
+    return magnitude;
+}
+
+@end