public void Matrix4x4_Clone()
{
Matrix4x4 m = CreateRandomMatrix();
Matrix c = null;
Assert.DoesNotThrow(() => c = m.Clone());
Assert.AreNotSame(m, c);
Assert.AreEqual(m.GetType(), c.GetType(), "Clone() mast return the same matrix type");
}
private void UpdateChildrenMatrices()
{
var mat = Matrix4x4.Identity;
mat.M14 = FloatHelpers.SignalingNaN;
mat.M24 = FloatHelpers.SignalingNaN;
mat.M34 = FloatHelpers.SignalingNaN;
mat.M44 = FloatHelpers.SignalingNaN;
Matrix4x4[] matrices = new Matrix4x4[NumBounds];
matrices.AsSpan().Fill(mat);
CurrentMatrices = new SimpleArray <Matrix4x4>(matrices);
LastMatrices = new SimpleArray <Matrix4x4>((Matrix4x4[])matrices.Clone());
}
// Start is called before the first frame update
void Start()
{
//Get the mesh and the material from the
this.mesh = MeshGetters.getTriMesh(1f, 2f);
this.grassRenderMaterial = Resources.Load <Material>("Materials/Grass");
grassTransforms = new List <Matrix4x4[]>();
float grassDensity = 0.3f;//1 blade of grass per area unit
int[] triangles = MeshGetters.getMeshTriangles(this.gameObject);
Vector3[] vertices = MeshGetters.getMeshVertices(this.gameObject);
Vector3[] curVertices = new Vector3[3];
int gtbi = 0;
Matrix4x4[] grassTransformBuffer = new Matrix4x4[1023];
//Iterate through our triangles array three at a time (one triangle)
for (int i = 0; i < triangles.Length; i += 3)
{
//Convert to vertices
curVertices[0] = Vector3.Scale(vertices[triangles[i]], transform.localScale) + transform.position;
curVertices[1] = Vector3.Scale(vertices[triangles[i + 1]], transform.localScale) + transform.position;
curVertices[2] = Vector3.Scale(vertices[triangles[i + 2]], transform.localScale) + transform.position;
float area = GeometryFunctions.getTriangleArea(curVertices);
int numBlades = (int)(area * grassDensity);
Vector3[] grassLocs = GeometryFunctions.getNLocationsOnTriangle(curVertices, numBlades);
for (int j = 0; j < grassLocs.Length; j++)
{
if (gtbi == 1023)
{
gtbi = 0;
Matrix4x4[] gtBufferCopy = (Matrix4x4[])grassTransformBuffer.Clone();
grassTransforms.Add(gtBufferCopy);
}
Quaternion rotationQuat = Quaternion.FromToRotation(transform.up, GeometryFunctions.getTriangleNormal(curVertices));
grassTransformBuffer[gtbi] = Matrix4x4.TRS(grassLocs[j], rotationQuat, new Vector3(1, 1, 1));
gtbi++;
}
}
//Get them leftovers
grassTransforms.Add(grassTransformBuffer);//this should be truncated and then added to the dynamic list based on the current j
//will deal with it later
}
private static Matrix4x4 ComputeInverse_Numerics_Matrix4x4_2(Matrix4x4 matrix)
{
Matrix4x4 invMatrix4x4 = (Matrix4x4)matrix.Clone();
unsafe
{
fixed(float *invVecPtr = invMatrix4x4.MatrixBuffer)
fixed(float *mVecPtr = matrix.MatrixBuffer)
{
Mat4x4 mVec = Unsafe.Read <Mat4x4>(mVecPtr), invVec;
if (Mat4x4.Invert(mVec, out invVec) == false)
{
throw new InvalidOperationException("not invertible");
}
Unsafe.Write(invVecPtr, invVec);
}
}
return(invMatrix4x4);
}