public void setTransparency(uint factor)
{
transparency = MathUtility.Crop(factor, 0, 255);
opaque = (transparency == 0);
}
public void setReflectivity(uint factor)
{
reflectivity = MathUtility.Crop(factor, 0, 255);
}
void drawLine(Vertex a, Vertex b, uint color)
{
Vertex temp;
if ((a.clipcode & b.clipcode) != 0)
{
return;
}
dx = Math.Abs(a.X - b.X);
dy = Math.Abs(a.Y - b.Y);
dz = 0;
if (dx > dy)
{
if (a.X > b.X)
{
temp = a; a = b; b = temp;
}
if (dx > 0)
{
dz = (b.Z - a.Z) / dx;
dy = ((b.Y - a.Y) << 16) / dx;
}
z = a.Z;
y = a.Y << 16;
var bX = b.X;
int xPlusOffset;
for (x = a.X; x <= bX; x++)
{
y2 = y >> 16;
if (MathUtility.inrange(x, 0, width - 1) && MathUtility.inrange(y2, 0, height - 1))
{
offset = y2 * width;
xPlusOffset = x + offset;
if (z < zBuffer[xPlusOffset])
{
if (!screen.antialias)
{
screen.p[xPlusOffset] = color;
zBuffer[xPlusOffset] = (uint)z;
}
else
{
screen.p[xPlusOffset] = color;
screen.p[xPlusOffset + 1] = color;
screen.p[xPlusOffset + width] = color;
screen.p[xPlusOffset + width + 1] = color;
zBuffer[xPlusOffset] = (uint)z;
}
}
if (useIdBuffer)
{
idBuffer[xPlusOffset] = currentId;
}
}
z += dz; y += dy;
}
}
else
{
if (a.Y > b.Y)
{
temp = a; a = b; b = temp;
}
if (dy > 0)
{
dz = (b.Z - a.Z) / dy;
dx = ((b.X - a.X) << 16) / dy;
}
z = a.Z;
x = a.X << 16;
int bY = b.Y;
int x2PlusOffset;
for (y = a.Y; y <= bY; y++)
{
x2 = x >> 16;
if (MathUtility.inrange(x2, 0, width - 1) && MathUtility.inrange(y, 0, height - 1))
{
offset = y * width;
x2PlusOffset = x2 + offset;
if (z < zBuffer[x2PlusOffset])
{
if (!screen.antialias)
{
screen.p[x2PlusOffset] = color;
zBuffer[x2PlusOffset] = (uint)z;
}
else
{
screen.p[x2PlusOffset] = color;
screen.p[x2PlusOffset + 1] = color;
screen.p[x2PlusOffset + width] = color;
screen.p[x2PlusOffset + width + 1] = color;
zBuffer[x2PlusOffset] = (uint)z;
}
}
if (useIdBuffer)
{
idBuffer[x2PlusOffset] = currentId;
}
}
z += dz; x += dx;
}
}
}
/// <summary>
/// Returns a random vector.
/// </summary>
/// <param name="fact"></param>
/// <returns></returns>
public static Vector Random(float fact)
{
return(new Vector(fact * MathUtility.Random(), fact * MathUtility.Random(), fact * MathUtility.Random()));
}
/// <summary>
/// Builds the cartesian coordinates out of the given cylindric coordinates.
/// </summary>
public void BuildCartesian()
{
X = R * MathUtility.Cos(Theta);
Y = R * MathUtility.Sin(Theta);
}
public void setFov(float fov)
{
fovfact = (float)Math.Tan(MathUtility.DegreesToRadians(fov) * 0.5);
}
public void clear(uint bgcolor)
{
MathUtility.clearBuffer(p, bgcolor);
}