diff options
Diffstat (limited to 'nGenEx/Polygon.cpp')
| -rw-r--r-- | nGenEx/Polygon.cpp | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/nGenEx/Polygon.cpp b/nGenEx/Polygon.cpp index 8051ec3..e21c442 100644 --- a/nGenEx/Polygon.cpp +++ b/nGenEx/Polygon.cpp @@ -665,15 +665,12 @@ Material::GetThumbColor(int i, int j, int size) int tu = (int) (u * tex_bumpmap->Width());
int tv = (int) (v * tex_bumpmap->Height());
- double du1 = tex_bumpmap->GetColor(tu,tv).Red() -
- tex_bumpmap->GetColor(tu-1,tv).Red();
- double du2 = tex_bumpmap->GetColor(tu+1,tv).Red() -
- tex_bumpmap->GetColor(tu,tv).Red();
-
- double dv1 = tex_bumpmap->GetColor(tu,tv).Red() -
- tex_bumpmap->GetColor(tu,tv-1).Red();
- double dv2 = tex_bumpmap->GetColor(tu,tv+1).Red() -
- tex_bumpmap->GetColor(tu,tv).Red();
+ DWORD tmpred = tex_bumpmap->GetColor(tu,tv).Red();
+ double du1 = tmpred - tex_bumpmap->GetColor(tu-1,tv).Red();
+ double du2 = tex_bumpmap->GetColor(tu+1,tv).Red() - tmpred;
+
+ double dv1 = tmpred - tex_bumpmap->GetColor(tu,tv-1).Red();
+ double dv2 = tex_bumpmap->GetColor(tu,tv+1).Red() - tmpred;
double du = (du1 + du2) / 512 * 1e-8;
double dv = (dv1 + dv2) / 512 * 1e-8;
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