static float unprecise_invSqrt(float x) { float xhalf = 0.5f * x; int i = Float.floatToIntBits(x); i = 0x5f3759df - (i >> 1); x = Float.intBitsToFloat(i); x *= (1.5f - xhalf * x * x); ret x; }
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| ID | Author/Program | Comment | Date |
|---|---|---|---|
| 1380 | stefan | From https://stackoverflow.com/questions/11513344/how-to-implement-the-fast-inverse-square-root-in-java | 2019-07-29 11:31:54 |
| Snippet ID: | #1024278 |
| Snippet name: | unprecise_invSqrt - the infamous inverse square root approximation |
| Eternal ID of this version: | #1024278/1 |
| Text MD5: | 9f21f44439309378799c64c01a193cbb |
| Author: | stefan |
| Category: | javax / maths |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2019-07-29 11:31:37 |
| Source code size: | 211 bytes / 8 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 285 / 323 |
| Referenced in: | #1006654 - Standard functions list 2 (LIVE, continuation of #761) |