blender
/
blender
134
399
Fork 582
Code Issues 6.3k Pull Requests 755 Projects 19 Wiki Activity

[Cycles] Fix math problems in safe_logf 

log(0) is undefined and should not have been included
log(1) == 0, dividing by zero is not recommended
This commit is contained in:
Ray molenkamp 2017-05-07 09:16:14 -06:00
parent 3cd27374ee
commit c9451f1cff
Notes: blender-bot 2023-12-08 16:39:08 +01:00 
Referenced by issue #54275, Blender cycles volumetric shader bug
Referenced by issue #51442, Compiling OpenCL program base: CL_DEVICE_NOT_AVAILABLE
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
intern/cycles/util/util_math.h
View File

@ -492,19 +492,19 @@ ccl_device float safe_powf(float a, float b)
return compatible_powf(a, b);
}
ccl_device float safe_logf(float a, float b)
{
if(UNLIKELY(a < 0.0f || b < 0.0f))
return 0.0f;
return logf(a)/logf(b);
}
ccl_device float safe_divide(float a, float b)
{
return (b != 0.0f)? a/b: 0.0f;
}
ccl_device float safe_logf(float a, float b)
{
if(UNLIKELY(a <= 0.0f || b <= 0.0f))
return 0.0f;
return safe_divide(logf(a),logf(b));
}
ccl_device float safe_modulo(float a, float b)
{
return (b != 0.0f)? fmodf(a, b): 0.0f;