Check determinant to prevent singular matrix issue

Switch_FileFormatsMain/FileFormats/BFRES/Bfres Structs/SubFiles/FMDL/FSHP.cs

@@ -909,18 +909,21 @@ namespace Bfres.Structs
             {
                 var skel = GetParentModel().Skeleton;
                 Matrix4 trans = Matrix4.Identity;
-
                 if (IsSingleBind)
                 {
                     if (BoneIndex >= skel.Node_Array.Length || BoneIndex == -1)
                         return position;
 
                     var bone = skel.bones[skel.Node_Array[BoneIndex]];
+
+                    if (trans.Determinant != 0)
                         trans = bone.invert;
                 }
                 else
                 {
                     var bone = skel.bones[BoneIndex];
+
+                    if (trans.Determinant != 0)
                         trans = bone.invert;
                 }
 
@@ -1090,8 +1093,8 @@ namespace Bfres.Structs
                     if (VertexSkinCount == 1 && vtx.boneIds.Count > 0)
                         boneId = vtx.boneIds[0];
 
-                  //  vtx.pos = TransformLocal(vtx.pos, boneId, VertexSkinCount == 1);
-                //    vtx.nrm = TransformLocal(vtx.nrm, boneId, VertexSkinCount == 1, false);
+                    vtx.pos = TransformLocal(vtx.pos, boneId, VertexSkinCount == 1);
+                    vtx.nrm = TransformLocal(vtx.nrm, boneId, VertexSkinCount == 1, false);
                 }
                 //Console.WriteLine($"Weight count {vtx.boneWeights.Count}");
                 //Console.WriteLine($"Index count {vtx.boneIds.Count}");

Switch_FileFormatsMain/GL/BFRES_Render.cs

@@ -296,7 +296,10 @@ namespace FirstPlugin
             Matrix4 camMat = previewScale * control.mtxCam * control.mtxProj;
 
             Matrix4 sphereMatrix = camMat;
+
+            if (sphereMatrix.Determinant != 0)
                 sphereMatrix.Invert();
+
             sphereMatrix.Transpose();
             shader.SetMatrix4x4("sphereMatrix", ref sphereMatrix);
 
@@ -308,7 +311,10 @@ namespace FirstPlugin
             shader.SetVector3("difLightColor", new Vector3(1));
             shader.SetVector3("ambLightColor", new Vector3(1));
 
-            Matrix4 invertedCamera = camMat.Inverted();
+            Matrix4 invertedCamera = Matrix4.Identity;
+            if (invertedCamera.Determinant != 0)
+                invertedCamera = camMat.Inverted();
+
             Vector3 lightDirection = new Vector3(0f, 0f, -1f);
 
             //Todo. Maybe change direction via AAMP file (configs shader data)
@@ -427,10 +433,6 @@ namespace FirstPlugin
         {
             for (int i = 0; i < fmdl.Skeleton.Node_Array.Length; i++)
             {
-                //   if (!fmdl.Skeleton.bones[fmdl.Skeleton.Node_Array[i]].Visible)
-                //    fshp.Checked = false;
-
-                
                 GL.Uniform1(GL.GetUniformLocation(shader.program, String.Format("boneIds[{0}]", i)), fmdl.Skeleton.Node_Array[i]);
 
                 Matrix4 transform = fmdl.Skeleton.bones[fmdl.Skeleton.Node_Array[i]].invert * fmdl.Skeleton.bones[fmdl.Skeleton.Node_Array[i]].Transform;