Porygon is a library for generate low-poly style images. It's algorithm is based on this paper and  Polyvia. The Delaunay algorithm used is this library.

如果你看的懂中文，你可以看我的这篇文章，里面会介绍实现的思路。

Effect

Detail

• Get the edge points
  • Use Sobel to find the edge vertices and randomly take a few vertices
  • Generate random vertices using Poisson samples
  • Merge these vertices
• Use Delaunay to form a number of triangles
• Get the color from the center of the triangle and fill the color

Requirements

• iOS 6.0+
• Xcode 7.0+

Installation

CocoaPods

1. Add pod 'Porygon' to your Podfile.
2. Run pod install or pod update.
3. Import <Porygon/Porygon.h>.

Manually

1. Download all the files in the Sources subdirectory.
2. Add the source files to your Xcode project.
3. Link with required frameworks:
   • UIKit
4. Import DVSPorygon.h.

Useage

Easy use

DVSPorygon *porygon = [[DVSPorygon alloc] init];
UIImage * lowPolyImage = [porygon lowPolyWithImage:[UIImage imageNamed:@"camera"]]; // get low poly image

Configuration parameters

DVSPorygon *porygon = [[DVSPorygon alloc] init];
// edge vertex count
porygon.vertexCount = 10000;
// randomly add the number of vertices
porygon.randomCount = 200;
// show wireframe effects
porygon.isWireframe = true;
UIImage * lowPolyImage = [porygon lowPolyWithImage:[UIImage imageNamed:@"camera"]]; // get low poly image

License

Porygon is provided under the MIT license. See LICENSE file for details.