private void AddToDraw(HyperLine projectedTriangle, float depth)
{
if (primitiveCount == privitiveBuffer.Length)
{
int newBufferSize = primitiveCount * 2;
Array.Resize(ref privitiveBuffer, newBufferSize);
Array.Resize(ref depthBuffer, newBufferSize);
}
privitiveBuffer[primitiveCount] = projectedTriangle;
depthBuffer[primitiveCount] = depth;
primitiveCount++;
}
public void Draw(HyperLine value, Matrix <float> worldViewProjection)
{
if (!drawMode)
{
throw new InvalidOperationException("Begin must be called.");
}
HyperLine triangle = value;
if (TryProjectPrimitive(ref triangle, worldViewProjection))
{
float depth = (triangle.Start.W + triangle.End.W) / 2f;
AddToDraw(triangle, depth);
}
}
private bool TryProjectPrimitive(ref HyperLine hyperLine, Matrix <float> worldViewProjection)
{
Vector4 u = new Vector4();
var pStart = ProjectVector(hyperLine.Start, worldViewProjection, out u.X);
var pEnd = ProjectVector(hyperLine.End, worldViewProjection, out u.Y);
const float epsilon = float.Epsilon;
if (u.X < epsilon || u.Y < epsilon)
{
return(false);
}
pStart /= u.X;
pEnd /= u.Y;
hyperLine = new HyperLine(pStart, pEnd, hyperLine.Color);
return(true);
}
public bool Equals(HyperLine other)
{
return(Start == other.Start && End == other.End && Color == other.Color);
}