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fixed tangent space

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This commit is contained in:
Mikulas Florek 2020-04-13 21:13:25 +02:00
parent 11eaa4803e
commit f71848569e
1 changed files with 10 additions and 4 deletions
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14
src/renderer/editor/fbx_importer.cpp
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@ -433,9 +433,9 @@ static void computeTangents(Array<ofbx::Vec3>& out, int vertex_count, const ofbx
const ofbx::Vec3 v0 = vertices[i + 0];
const ofbx::Vec3 v1 = vertices[i + 1];
const ofbx::Vec3 v2 = vertices[i + 2];
const ofbx::Vec2 uv0 = uvs[0];
const ofbx::Vec2 uv1 = uvs[1];
const ofbx::Vec2 uv2 = uvs[2];
const ofbx::Vec2 uv0 = uvs[i + 0];
const ofbx::Vec2 uv1 = uvs[i + 1];
const ofbx::Vec2 uv2 = uvs[i + 2];
const ofbx::Vec3 dv10 = v1 - v0;
const ofbx::Vec3 dv20 = v2 - v0;
@ -447,7 +447,13 @@ static void computeTangents(Array<ofbx::Vec3>& out, int vertex_count, const ofbx
tangent.x = (dv20.x * duv10.y - dv10.x * duv20.y) * dir;
tangent.y = (dv20.y * duv10.y - dv10.y * duv20.y) * dir;
tangent.z = (dv20.z * duv10.y - dv10.z * duv20.y) * dir;
out[i] = tangent;
const float l = 1 / sqrtf(float(tangent.x * tangent.x + tangent.y * tangent.y + tangent.z * tangent.z));
tangent.x *= l;
tangent.y *= l;
tangent.z *= l;
out[i + 0] = tangent;
out[i + 1] = tangent;
out[i + 2] = tangent;
}
}