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< > BotCompany Repo | #1027305 // lazyBWImage - IBWImage with on-demand pixel generation. not synchronized

JavaX fragment (include) [tags: use-pretranspiled]

Uses 11335K of libraries. Click here for Pure Java version (2233L/14K).

!include once #1027304 // eclipse collections

import org.eclipse.collections.impl.map.mutable.primitive.*;

static IBWImage lazyBWImage(int w, int h, IF2<Int, Int, Float> getFloatPixel) {
  ret new IBWImage {
    new IntFloatHashMap knownPixels;
    
    public int getWidth() { ret w; }
    public int getHeight() { ret h; }
    
    public float getFloatPixel(int x, int y) {
      int i = x*w+h;
      Float f = knownPixels.getIfAbsent(i, Float.NaN);
      if (!isNaN(f)) ret f;
        knownPixels.put(i, f = getFloatPixel.get(x, y));
      ret f;
    }
  };
}

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Snippet ID: #1027305
Snippet name: lazyBWImage - IBWImage with on-demand pixel generation. not synchronized
Eternal ID of this version: #1027305/5
Text MD5: 505c40580f962c808d2fdb71ecd665d0
Transpilation MD5: 933e7b29940f6115c3ccedbf2279fcfc
Author: stefan
Category: javax / maths
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2020-03-01 11:26:31
Source code size: 584 bytes / 20 lines
Pitched / IR pitched: No / No
Views / Downloads: 201 / 308
Version history: 4 change(s)
Referenced in: [show references]