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Improve terrain paint blending of the existing layer values

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#2258
This commit is contained in:
Wojtek Figat
2024-02-26 16:44:55 +01:00
parent f1fe83ca81
commit 0ee5ef8cf5
1 changed files with 11 additions and 12 deletions
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23
Source/Editor/Tools/Terrain/Paint/SingleLayerMode.cs
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@@ -93,22 +93,21 @@ namespace FlaxEditor.Tools.Terrain.Paint
if (paintAmount < 0.0f)
continue; // Skip when pixel won't be affected
// Paint on the active splatmap texture
src[c] = Mathf.Saturate(src[c] + paintAmount);
src[(c + 1) % 4] = Mathf.Saturate(src[(c + 1) % 4] - paintAmount);
src[(c + 2) % 4] = Mathf.Saturate(src[(c + 2) % 4] - paintAmount);
src[(c + 3) % 4] = Mathf.Saturate(src[(c + 3) % 4] - paintAmount);
p.TempBuffer[z * p.ModifiedSize.X + x] = src;
// Other layers reduction based on their sum and current paint intensity
var srcOther = (Color)p.SourceDataOther[zz * p.HeightmapSize + xx];
var otherLayersSum = src.ValuesSum + srcOther.ValuesSum - src[c];
var decreaseAmount = paintAmount / otherLayersSum;
// Paint on the active splatmap texture
var srcNew = Color.Clamp(src - src * decreaseAmount, Color.Zero, Color.White);
srcNew[c] = Mathf.Saturate(src[c] + paintAmount);
p.TempBuffer[z * p.ModifiedSize.X + x] = srcNew;
var other = (Color)p.SourceDataOther[zz * p.HeightmapSize + xx];
//if (other.ValuesSum > 0.0f) // Skip editing the other splatmap if it's empty
{
// Remove 'paint' from the other splatmap texture
other[c] = Mathf.Saturate(other[c] - paintAmount);
other[(c + 1) % 4] = Mathf.Saturate(other[(c + 1) % 4] - paintAmount);
other[(c + 2) % 4] = Mathf.Saturate(other[(c + 2) % 4] - paintAmount);
other[(c + 3) % 4] = Mathf.Saturate(other[(c + 3) % 4] - paintAmount);
p.TempBufferOther[z * p.ModifiedSize.X + x] = other;
srcOther = Color.Clamp(srcOther - srcOther * decreaseAmount, Color.Zero, Color.White);
p.TempBufferOther[z * p.ModifiedSize.X + x] = srcOther;
otherModified = true;
}
}