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Fix display of rotated meshes with MeshTransformation 

Rotation used the wrong (untransformed) coordinates for the rotation center
directional-lights
Sven Eberhardt 2016-10-31 10:01:19 -04:00
parent 194e7d709b
commit f17046e1f0
1 changed files with 4 additions and 1 deletions
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5
src/object/C4Object.cpp
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@ -503,7 +503,10 @@ void C4Object::DrawFaceImpl(C4TargetFacet &cgo, bool action, float fx, float fy,
if (fix_r != Fix0)
{
const auto mesh_center = pMeshInstance->GetMesh().GetBoundingBox().GetCenter();
// Rotation should happen around the mesh center after application of any mesh transformation
// So translate back by the transformed mesh center before rotation
auto mesh_center = pMeshInstance->GetMesh().GetBoundingBox().GetCenter();
mesh_center = matrix * mesh_center;
matrix = StdMeshMatrix::Translate(-mesh_center.x, -mesh_center.y, -mesh_center.z) * matrix;
matrix = StdMeshMatrix::Rotate(fixtof(fix_r) * (M_PI / 180.0f), 0.0f, 0.0f, 1.0f) * matrix;
matrix = StdMeshMatrix::Translate(mesh_center.x, mesh_center.y, mesh_center.z) * matrix;