void FillTriangle(Vertex v1, Vertex v2, Vertex v3, Bitmap texture)
{
var screenSpace = Matrix4Utils.ScreenSpace(Width / 2, Height / 2);
Matrix4 iden = Matrix4.Identity;
Vertex minYVert = v1.Transform(screenSpace, iden).PerspectiveDivide();
Vertex midYVert = v2.Transform(screenSpace, iden).PerspectiveDivide();
Vertex maxYVert = v3.Transform(screenSpace, iden).PerspectiveDivide();
if (minYVert.TriangleAreaTimesTwo(maxYVert, midYVert) >= 0)
{
return;
}
if (maxYVert.Y < midYVert.Y)
{
Swap(ref maxYVert, ref midYVert);
}
if (midYVert.Y < minYVert.Y)
{
Swap(ref midYVert, ref minYVert);
}
if (maxYVert.Y < midYVert.Y)
{
Swap(ref maxYVert, ref midYVert);
}
float a = minYVert.TriangleAreaTimesTwo(maxYVert, midYVert);
ScanTriangle(minYVert, midYVert, maxYVert, a >= 0, texture);
}
static void Main(string[] args)
{
UnusedParameters(args);
Display display = new Display();
RenderContext target = display.FrameBuffer;
Bitmap texture = new Bitmap("./res/bricks.jpg");
Bitmap texture2 = new Bitmap("./res/bricks2.jpg");
Mesh monkeyMesh = Mesh.FromFile("./res/smoothMonkey0.obj");
Mesh terrainMesh = Mesh.FromFile("./res/terrain2.obj");
Transform monkeyTransform = new Transform(new Vector4(0, 0, 3, 1));
Transform terrainTransform = new Transform(new Vector4(0, -1, 0, 1));
Camera camera = new Camera(
Matrix4Utils.Perspective(
MathHelper.DegreesToRadians(70),
(float)target.Width / target.Height,
0.1f, 1000.0f
)
);
long previousTime = DateTime.UtcNow.Ticks;
display.UpdateFrame += delegate(object s, FrameEventArgs e)
{
UnusedParameters(s, e);
long currentTime = DateTime.UtcNow.Ticks;
float delta = (float)((currentTime - previousTime) / 10000000.0);
previousTime = currentTime;
camera.Update(display.Input, delta);
Matrix4 vp = camera.ViewProjection;
monkeyTransform = monkeyTransform.Rotate(
Quaternion.FromAxisAngle(new Vector3(0, 1, 0), delta)
);
target.Clear(0x00);
target.ClearDepthBuffer();
monkeyMesh.Draw(target, vp, monkeyTransform.Matrix, texture2);
terrainMesh.Draw(target, vp, terrainTransform.Matrix, texture);
display.SwapBuffers();
};
display.Run();
}
