public static VertexPositionNormalTexture[] ToNonIndexedWithNormals(KModel model, Texture2D texture, bool smoothShading)
{
// Calc normals
Vector3[] normals;
if (smoothShading)
normals = model.CalcVertexNormals();
else
normals = model.CalcFacetNormals();
// Build vertex array for rendering
var result = new VertexPositionNormalTexture[3 * model.Facets.Count];
var arrayIndex = 0;
for (int facetIndex = 0; facetIndex < model.Facets.Count; facetIndex++)
{
var facet = model.Facets[facetIndex];
result[arrayIndex].Position = model.Vertices[facet.Ve0].Pt;
result[arrayIndex].TextureCoordinate = facet.Tex0;
result[arrayIndex].Normal = smoothShading ? normals[facet.Ve0] : normals[facetIndex];
arrayIndex++;
result[arrayIndex].Position = model.Vertices[facet.Ve1].Pt;
result[arrayIndex].TextureCoordinate = facet.Tex1;
result[arrayIndex].Normal = smoothShading ? normals[facet.Ve1] : normals[facetIndex];
arrayIndex++;
result[arrayIndex].Position = model.Vertices[facet.Ve2].Pt;
result[arrayIndex].TextureCoordinate = facet.Tex2;
result[arrayIndex].Normal = smoothShading ? normals[facet.Ve2] : normals[facetIndex];
arrayIndex++;
}
/*for (int i = 0; i < result.Length; i++)
{
result[i].Normal = result[i].Position.Normalized();
}*/
// If texture coordinates are in pixels, then scale them all to [0,1] x [0,1]
if (model.TexCoordsAreInPixels)
{
var scaleX = 1f / texture.Bounds.Width;
var scaleY = 1f / texture.Bounds.Height;
var bounds = texture.Bounds;
for (int i = 0; i < result.Length; i++)
{
result[i].TextureCoordinate.X *= scaleX;
result[i].TextureCoordinate.Y *= scaleY;
}
}
return result;
}
