CCEffectReflection - Add initializer / constructor methods that accept fresnel parameters

Author: Thayer J Andrews

cocos2d-ui-tests/tests/CCEffectsTest.m

@@ -518,7 +518,7 @@ -(void)setupStackTest
                          [CCEffectHue effectWithHue:90.0f],
                          [CCEffectGlass effectWithRefraction:0.5f refractionEnvironment:refractEnvironment reflectionEnvironment:reflectEnvironment normalMap:nil],
                          [CCEffectRefraction effectWithRefraction:0.5f environment:refractEnvironment normalMap:nil],
-                         [CCEffectReflection effectWithEnvironment:reflectEnvironment normalMap:nil],
+                         [CCEffectReflection effectWithFresnelBias:0.2f fresnelPower:2.0f environment:reflectEnvironment normalMap:nil],
                          ];
 
 
@@ -566,7 +566,7 @@ -(void)setupPerformanceTest
                             [CCEffectHue effectWithHue:90.0f],
                             [CCEffectGlass effectWithRefraction:0.5f refractionEnvironment:refractEnvironment reflectionEnvironment:reflectEnvironment normalMap:nil],
                             [CCEffectRefraction effectWithRefraction:0.5f environment:refractEnvironment normalMap:nil],
-                            [CCEffectReflection effectWithEnvironment:reflectEnvironment normalMap:nil],
+                            [CCEffectReflection effectWithFresnelBias:0.1f fresnelPower:4.0f environment:reflectEnvironment normalMap:nil],
                             ];
     CCEffect *selectedEffect = allEffects[8];
 

cocos2d/CCEffectReflection.h

@@ -18,7 +18,10 @@
 
 -(id)init;
 -(id)initWithEnvironment:(CCSprite *)environment normalMap:(CCSpriteFrame *)normalMap;
+-(id)initWithFresnelBias:(float)bias fresnelPower:(float)power environment:(CCSprite *)environment normalMap:(CCSpriteFrame *)normalMap;
+
 +(id)effectWithEnvironment:(CCSprite *)environment normalMap:(CCSpriteFrame *)normalMap;
++(id)effectWithFresnelBias:(float)bias fresnelPower:(float)power environment:(CCSprite *)environment normalMap:(CCSpriteFrame *)normalMap;
 
 @end
 #endif

cocos2d/CCEffectReflection.m

@@ -35,9 +35,14 @@ -(id)init
 }
 
 -(id)initWithEnvironment:(CCSprite *)environment normalMap:(CCSpriteFrame *)normalMap
+{
+    return [self initWithFresnelBias:1.0f fresnelPower:0.0f environment:environment normalMap:normalMap];
+}
+
+-(id)initWithFresnelBias:(float)bias fresnelPower:(float)power environment:(CCSprite *)environment normalMap:(CCSpriteFrame *)normalMap
 {
     NSArray *uniforms = @[
-                          [CCEffectUniform uniform:@"float" name:@"u_fresnelBias" value:[NSNumber numberWithFloat:0.0f]],
+                          [CCEffectUniform uniform:@"float" name:@"u_fresnelBias" value:[NSNumber numberWithFloat:1.0f]],
                           [CCEffectUniform uniform:@"float" name:@"u_fresnelPower" value:[NSNumber numberWithFloat:0.0f]],
                           [CCEffectUniform uniform:@"sampler2D" name:@"u_envMap" value:(NSValue*)[CCTexture none]],
                           [CCEffectUniform uniform:@"vec2" name:@"u_tangent" value:[NSValue valueWithGLKVector2:GLKVector2Make(1.0f, 0.0f)]],
@@ -49,6 +54,8 @@ -(id)initWithEnvironment:(CCSprite *)environment normalMap:(CCSpriteFrame *)norm
     {
         _environment = environment;
         _normalMap = normalMap;
+        _fresnelBias = bias;
+        _fresnelPower = power;
 
         self.debugName = @"CCEffectReflection";
     }
@@ -60,6 +67,11 @@ +(id)effectWithEnvironment:(CCSprite *)environment normalMap:(CCSpriteFrame *)no
     return [[self alloc] initWithEnvironment:environment normalMap:normalMap];
 }
 
++(id)effectWithFresnelBias:(float)bias fresnelPower:(float)power environment:(CCSprite *)environment normalMap:(CCSpriteFrame *)normalMap
+{
+    return [[self alloc] initWithFresnelBias:bias fresnelPower:power environment:environment normalMap:normalMap];
+}
+
 -(void)buildFragmentFunctions
 {
     self.fragmentFunctions = [[NSMutableArray alloc] init];