Fixed cloth tangent generation (from 'stabilization/2106' @26c9853f)

- The output vectors were not properly filled with zeros when they already had the expected size. - The tolerance was too large and was causing patches while computing tangents and bitangents. - The handedness was inverted to what is expected in the shader (which always inverts tangent's w). Signed-off-by: moraaar <moraaar@amazon.com>
2021-07-28 13:14:56 +01:00
parent 5662cb551e
commit d38f17131e
3 changed files with 23 additions and 11 deletions
@@ -578,7 +578,7 @@ namespace NvCloth
                    const AZ::Vector3& renderTangent = renderTangents[renderVertexIndex];
                    destTangentsBuffer[index].Set(
                        renderTangent,
-                        1.0f);
+                        -1.0f); // Shader function ConstructTBN inverts w to change bitangent sign, but the bitangents passed are already corrected, so passing -1.0 to counteract.
                }

                if (destBitangentsBuffer)