Originally developed by Matt Gallagher, further developed by Roy Ratcliffe, ported to iPhone by Ole Begemann, and now with additional refactoring by Roy Ratcliffe. Call it a team effort!
- Matt's original post: Drawing gloss gradients in CoreGraphics
- Roy's further-development post: Gloss-Caustic Shading
- Ole's iPhone-port post: Porting RRGlossCausticShader to the iPhone
- Roy's additional-refactoring post: Gloss Caustic Shader for iPhone
Add the files in the root folder to your Xcode project, namely:
mfor the gloss-caustic shader,
mfor the caustic colour matcher,
mfor the exponential helper,
mfor luminance conversion,
UIColorextensions (iPhone only).
Create an instance of
Optionally modify the shader's base colour and parameters (see
RRCausticColorMatcher.hfor the possible settings).
-drawRect:method, do something like this:
CGRect bounds = self.bounds; [shader drawShadingFromPoint:bounds.origin toPoint:CGPointMake(bounds.origin.x, bounds.origin.y + bounds.size.height) inContext:UIGraphicsGetCurrentContext()];
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