1 files changed, 117 insertions, 0 deletions

@@ -0,0 +1,117 @@
+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2008, 2009 Jason Booth
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+
+#import "CCNode.h"
+#import "CCTexture2D.h"
+#import "CCProtocols.h"
+#import "Platforms/CCGL.h"
+
+/**
+ * A CCRibbon is a dynamically generated list of polygons drawn as a single or series
+ * of triangle strips. The primary use of CCRibbon is as the drawing class of Motion Streak,
+ * but it is quite useful on it's own. When manually drawing a ribbon, you can call addPointAt
+ * and pass in the parameters for the next location in the ribbon. The system will automatically
+ * generate new polygons, texture them accourding to your texture width, etc, etc.
+ *
+ * CCRibbon data is stored in a CCRibbonSegment class. This class statically allocates enough verticies and
+ * texture coordinates for 50 locations (100 verts or 48 triangles). The ribbon class will allocate
+ * new segments when they are needed, and reuse old ones if available. The idea is to avoid constantly
+ * allocating new memory and prefer a more static method. However, since there is no way to determine
+ * the maximum size of some ribbons (motion streaks), a truely static allocation is not possible.
+ *
+ * @since v0.8.1
+ */
+@interface CCRibbon : CCNode <CCTextureProtocol>
+{
+        NSMutableArray* segments_;
+        NSMutableArray* deletedSegments_;
+
+        CGPoint                 lastPoint1_;
+        CGPoint                 lastPoint2_;
+        CGPoint                 lastLocation_;
+        int                                     vertCount_;
+        float                           texVPos_;
+        float                           curTime_;
+        float                           fadeTime_;
+        float                           delta_;
+        float                           lastWidth_;
+        float                           lastSign_;
+        BOOL                            pastFirstPoint_;
+
+        // Texture used
+        CCTexture2D*            texture_;
+
+        // texture length
+        float                   textureLength_;
+
+        // RGBA protocol
+        ccColor4B color_;
+
+        // blend func
+        ccBlendFunc             blendFunc_;
+}
+
+/** Texture used by the ribbon. Conforms to CCTextureProtocol protocol */
+@property (nonatomic,readwrite,retain) CCTexture2D* texture;
+
+/** Texture lengths in pixels */
+@property (nonatomic,readwrite) float textureLength;
+
+/** GL blendind function */
+@property (nonatomic,readwrite,assign) ccBlendFunc blendFunc;
+
+/** color used by the Ribbon (RGBA) */
+@property (nonatomic,readwrite) ccColor4B color;
+
+/** creates the ribbon */
++(id)ribbonWithWidth:(float)w image:(NSString*)path length:(float)l color:(ccColor4B)color fade:(float)fade;
+/** init the ribbon */
+-(id)initWithWidth:(float)w image:(NSString*)path length:(float)l color:(ccColor4B)color fade:(float)fade;
+/** add a point to the ribbon */
+-(void)addPointAt:(CGPoint)location width:(float)w;
+/** polling function */
+-(void)update:(ccTime)delta;
+/** determine side of line */
+-(float)sideOfLine:(CGPoint)p l1:(CGPoint)l1 l2:(CGPoint)l2;
+
+@end
+
+/** object to hold ribbon segment data */
+@interface CCRibbonSegment : NSObject
+{
+@public
+        GLfloat verts[50*6];
+        GLfloat coords[50*4];
+        GLubyte colors[50*8];
+        float           creationTime[50];
+        BOOL            finished;
+        uint            end;
+        uint            begin;
+}
+-(id)init;
+-(void)reset;
+-(void)draw:(float)curTime fadeTime:(float)fadeTime color:(ccColor4B)color;
+@end