Backport library to .NET5

The decision to simply bump the version to .NET7 was purely out of convenience because it provided a tiny little utility function that the Matrix implementation uses. This decision was made when this wasn't really intended to be a proper continuation of the project but simply a quick and dirty fork that would work for my purposes. I realize that considering the broad userbase people might genuinely benefit from this.

Author: Saalvage

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.x.x
+          dotnet-version: 5.x.x
 
       - run: dotnet test AssimpNet.Test -c ${{ matrix.configuration }} ${{ matrix.additional_args }}
 

AssimpNet.Sample/AssimpNet.Sample.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net7</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <RootNamespace>Assimp.Sample</RootNamespace>
     <ApplicationIcon />
     <StartupObject />

AssimpNet.Test/AssimpNet.Test.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8</TargetFrameworks>
+    <TargetFrameworks>net6.0</TargetFrameworks>
     <RootNamespace>Assimp.Test</RootNamespace>
     <LangVersion>latest</LangVersion>
     <ForceCopyNativeAssimp>true</ForceCopyNativeAssimp>

AssimpNet/AssimpNet.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net7</TargetFrameworks>
+    <TargetFrameworks>net5.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <GenerateAssemblyInfo>true</GenerateAssemblyInfo>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>

AssimpNet/Matrix3x3.cs

@@ -484,7 +484,19 @@ public static Matrix3x3 FromToMatrix(Vector3 from, Vector3 to)
                 {
                     for(int j = 1; j < 4; j++)
                     {
-                        m[i, j] = -c1 * u[i] * u[j] - c2 * v[i] * v[j] + c3 * v[i] * u[j];
+                        m[i, j] = -c1 * Index(u, i) * Index(u, j) - c2 * Index(v, i) * Index(v, j) + c3 * Index(v, i) * Index(u, j);
+
+                        continue;
+
+                        static float Index(Vector3 v, int i)
+                        {
+                            return i switch
+                            {
+                                1 => v.X,
+                                2 => v.Y,
+                                3 => v.Z,
+                            };
+                        }
                     }
                     m[i, i] += 1.0f;
                 }

README.md

@@ -25,7 +25,7 @@ The library is split between two parts, a low level and a high level. The intent
 
 ## Supported Frameworks ##
 
-The library runs on **.NET 7**.
+The library runs on **.NET 5**.
 
 ## Supported Platforms ##