diff options
Diffstat (limited to 'GPU3D_Soft.cpp')
| -rw-r--r-- | GPU3D_Soft.cpp | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/GPU3D_Soft.cpp b/GPU3D_Soft.cpp index 7c7613c..0f8ef69 100644 --- a/GPU3D_Soft.cpp +++ b/GPU3D_Soft.cpp @@ -467,10 +467,10 @@ void RenderPolygon(Polygon* polygon) s32 wl = vlcur->FinalPosition[3] + (((s64)(vlnext->FinalPosition[3] - vlcur->FinalPosition[3]) * lfactor) >> 12); s32 wr = vrcur->FinalPosition[3] + (((s64)(vrnext->FinalPosition[3] - vrcur->FinalPosition[3]) * rfactor) >> 12); - s64 perspfactorl1 = ((s64)(0x1000 - lfactor) << 12) / vlcur->FinalPosition[3]; - s64 perspfactorl2 = ((s64)lfactor << 12) / vlnext->FinalPosition[3]; - s64 perspfactorr1 = ((s64)(0x1000 - rfactor) << 12) / vrcur->FinalPosition[3]; - s64 perspfactorr2 = ((s64)rfactor << 12) / vrnext->FinalPosition[3]; + s64 perspfactorl1 = ((s64)(0x1000 - lfactor) * vlnext->FinalPosition[3]) >> 12; + s64 perspfactorl2 = ((s64)lfactor * vlcur->FinalPosition[3]) >> 12; + s64 perspfactorr1 = ((s64)(0x1000 - rfactor) * vrnext->FinalPosition[3]) >> 12; + s64 perspfactorr2 = ((s64)rfactor * vrcur->FinalPosition[3]) >> 12; if (perspfactorl1 + perspfactorl2 == 0) { @@ -512,8 +512,8 @@ void RenderPolygon(Polygon* polygon) //z -= 0x1FF; //if (z < 0) z = 0; - s32 perspfactor1 = ((0x1000 - xfactor) << 12) / wl; - s32 perspfactor2 = (xfactor << 12) / wr; + s32 perspfactor1 = ((s64)(0x1000 - xfactor) * wr) >> 12; + s32 perspfactor2 = ((s64)xfactor * wl) >> 12; if (perspfactor1 + perspfactor2 == 0) { @@ -528,8 +528,10 @@ void RenderPolygon(Polygon* polygon) u32 vg = ((perspfactor1 * gl) + (perspfactor2 * gr)) / (perspfactor1 + perspfactor2); u32 vb = ((perspfactor1 * bl) + (perspfactor2 * br)) / (perspfactor1 + perspfactor2); - s16 s = ((perspfactor1 * sl) + (perspfactor2 * sr)) / (perspfactor1 + perspfactor2); - s16 t = ((perspfactor1 * tl) + (perspfactor2 * tr)) / (perspfactor1 + perspfactor2); + s16 s = ((perspfactor1 * (s64)sl) + (perspfactor2 * (s64)sr)) / (perspfactor1 + perspfactor2); + s16 t = ((perspfactor1 * (s64)tl) + (perspfactor2 * (s64)tr)) / (perspfactor1 + perspfactor2); + + //printf("y=%d x=%d: s=%04X t=%04X\n", y, x, s, t); RenderPixel(polygon, x, y, z, vr>>3, vg>>3, vb>>3, s, t); } |