public static Engine.State Convert(State state, Tile tile, uint id)
{
Exception undefModel = new Exception("Undefined model!");
Exception undefTexture = new Exception("Undefined texture!");
Box box = state.Transform == null
? new Box()
: BoxFromTransform(state.Transform);
if (tile.Models == null || state.Model == null)
{
throw undefModel;
}
Render.Model?model = Core.Unit.Resource.LoadModel(tile.Models[(int)state.Model]);
if (model == null)
{
throw undefModel;
}
Render.Model tranformed = new Render.Model(
model.Faces.Select(f => new Render.Face(f, box)).ToArray(),
model.FullSides
);
if (tile.Textures == null)
{
throw undefTexture;
}
uint[]? layers = state.Layers ?? tile.Default?.Layers;
if (layers == null)
{
throw undefTexture;
}
uint[] loaded = layers
.Select(l => Core.Unit.Atlas.LoadSprite(tile.Textures[l]))
.ToArray();
return(new Engine.State(tranformed, id, loaded, box));
}
private void RenderModel(Render.Model model, IMatrix4x4 viewProjectionMatrix, Matrix <double> modelMatrix, Vector <double> cameraPosition)
{
if (!model.Shader.SetUniformMatrix("viewProjectionTransformation", viewProjectionMatrix))
{
throw new Exception("Vertex shader is missing 'viewProjectionTransformation'");
}
if (!model.Shader.SetUniformMatrix("modelTransformation", modelMatrix))
{
throw new Exception("Vertex shader is missing 'modelTransformation'");
}
model.Shader.SetUniformVector("cameraPos", cameraPosition);
Gl.BindVertexArray(model.Mesh.VertexArrayObjectId);
Gl.ActiveTexture(TextureUnit.Texture0);
Gl.BindTexture(TextureTarget.Texture2d, model.Texture?.Id ?? 0);
Gl.UseProgram(model.Shader.Id);
Gl.DrawElements(PrimitiveType.Triangles, model.Mesh.IndexCount, DrawElementsType.UnsignedInt, IntPtr.Zero);
}
