private static void RenderGouraudShader(this Image <Rgba32> screen, float[,] zBuffer)
{
var cameraPosition = new Vector3(1, 1, 3);
var cameraTarget = new Vector3(0, 0, 0);
var cameraUp = new Vector3(0, 1, 0);
var viewPort = CreateViewPort(ScreenWidth / 8, ScreenHeight / 8, ScreenWidth * 3 / 4, ScreenHeight * 3 / 4);
var projection = CreateProjection(-1 / (cameraPosition - cameraTarget).Length());
var modelView = CreateLookAt(cameraPosition, cameraTarget, cameraUp);
var light = new Vector3(1, 1, 1).Normalize();
var shader = new GouraudShader
{
Transform = viewPort * projection * modelView,
Light = light
};
var model = ModelUtils.LoadModel(@"Resources\Head\Model.obj");
screen.Render(model, shader, zBuffer);
}
public void Render()
{
Stopwatch sw = new Stopwatch();
sw.Start();
DirectBitmap bitmap = new DirectBitmap(width, height);
Rasterizer rasterizer = new Rasterizer();
//// start of picture render by toon shader ////
var toon_shader = new GouraudShader(model, ViewPort, Projection, ModelView, light_dir);
for (int i = 0; i < model.FacesV.Count; i++)
{
Vector4[] screen_coords = new Vector4[3];
for (int j = 0; j < model.FacesV[i].Length; j++)
{
screen_coords[j] = toon_shader.Vertex(i, j);
}
rasterizer.Triangle(screen_coords, toon_shader, bitmap, pictureBox, z_buffer);
}
//// end of picture render by toon shader ////
sw.Stop();
model.Texture.Dispose();
bitmap.Bitmap.RotateFlip(RotateFlipType.Rotate180FlipNone);
InfoViewer.ShowDiagnosticInfo
($"Render Time: {sw.Elapsed.TotalMilliseconds:f2} ms", new PointF(10, 30), Graphics.FromImage(bitmap.Bitmap));
// output final render
pictureBox.Image = bitmap.Bitmap;
}