public void Draw(Buffer <float> depth, Buffer <vec4> buffer, T[] vertices, int[] triangles)
{
var shaded = vertices.Select(x => vertexShader.ShadeVertex(x)).ToArray();
for (int i = 0; i < triangles.Length; i += 3)
{
var a = shaded[triangles[i]];
var b = shaded[triangles[i + 1]];
var c = shaded[triangles[i + 2]];
var screenA = ClipSpaceToScreenSpace(buffer.Width, buffer.Height, a.ClipPos);
var screenB = ClipSpaceToScreenSpace(buffer.Width, buffer.Height, b.ClipPos);
var screenC = ClipSpaceToScreenSpace(buffer.Width, buffer.Height, c.ClipPos);
Rasterization.FillTriangle(screenA, screenB, screenC, buffer.Width, buffer.Height, (p, bcc) =>
{
var newDepth = ((bcc.x * a.ClipPos) + (bcc.y * b.ClipPos) + (bcc.z * c.ClipPos)).z;
var oldDepth = depth[p.x, p.y];
if (newDepth < oldDepth)
{
return;
}
depth[p.x, p.y] = newDepth;
var vertexData = a.Combine(b, c, bcc.x, bcc.y, bcc.z);
var color = fragmentShader.ShadeFragment(vertexData);
buffer[p.x, p.y] = color;
});
}
}
