private void DrawClipTriangle(Triangle tri, DirectBitmap b, float[] depthBuffer, Vector3 normal, FragmentShaderDelegate frag)
{
Fragment fragment = new Fragment();
float zBuf;
int padding = 5;
int minX = int.MaxValue, maxX = int.MinValue, minY = int.MaxValue, maxY = int.MinValue;
foreach (Vector2 v in tri.Points) //Get bounding box
{
if (v.x > maxX)
{
maxX = (int)(v.x + 1);//Round up
}
if (v.x < minX)
{
minX = (int)(v.x);
}
if (v.y > maxY)
{
maxY = (int)(v.y + 1);
}
if (v.y < minY)
{
minY = (int)(v.y);
}
}
if (maxX > camera.renderWidth)
{
maxX = camera.renderWidth;
}
if (minX < 0)
{
minX = 0;
}
if (maxY > camera.renderHeight)
{
maxY = camera.renderHeight;
}
if (minY < 0)
{
minY = 0;
}
Vector2 pt = new Vector2();
maxX = (maxX + padding > camera.renderWidth - 1 ? camera.renderWidth - 1 : maxX + padding);
maxY = (maxY + padding > camera.renderHeight - 1 ? camera.renderHeight - 1 : maxY + padding);
minX = (minX - padding < 0 ? 0 : minX - padding);
minY = (minY - padding < 0 ? 0 : minY - padding);
float z;
for (int i = minX; i < maxX; i++)
{
for (int j = minY + 1; j <= maxY; j++)
{
pt.x = i + 0.5f;
pt.y = j + 0.5f;
Vector3 baryCoords = tri.GetBarycentricCoordinates(pt, out bool inside);
if (inside)
{
//Do some interpolation with the z-buffer here
z = tri.ZAt(baryCoords);
zBuf = depthBuffer[(i) + (camera.renderHeight * (camera.renderHeight - j))];
if (zBuf == 0 || z < zBuf)
{
fragment.uv = tri.UVAt(baryCoords);
fragment.normal = tri.NormalAt(baryCoords);
fragment.color = Color.HotPink;
fragment.triangle = tri;
fragment.faceNormal = normal;
fragment.camera = camera;
fragment.thisMesh = mesh;
fragment.x = i;
fragment.y = j;
fragment.z = z;
frag(fragment);
b.SetPixel(fragment.x, camera.renderHeight - fragment.y, fragment.color);
depthBuffer[(fragment.x) + (camera.renderHeight * (camera.renderHeight - fragment.y))] = fragment.z;
}
}
}
}
}
public void SmoothShader(Fragment f)
{
float fac = Vector3.Dot(f.normal, -f.camera.transform.Forward);
f.color = Color.FromArgb(albedo.A, (byte)(fac * albedo.R), (byte)(fac * albedo.G), (byte)(fac * albedo.B));
}
