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void Sub(int K,
         float X1, float Y1, float Z1,
         float X2, float Y2, float Z2)
{
  Vector[K,0] = X1-X2;
  Vector[K,1] = Y1-Y2;
  Vector[K,2] = Z1-Z2;
}

//

void Cross(int K,
           float X1, float Y1, float Z1,
           float X2, float Y2, float Z2)
{
  Vector[K,0] = Y1*Z2-Z1*Y2;
  Vector[K,1] = Z1*X2-X1*Z2;
  Vector[K,2] = X1*Y2-Y1*X2;
}

//

float Dot(float X1, float Y1, float Z1,
          float X2, float Y2, float Z2)
{
  return X1*X2+Y1*Y2+Z1*Z2;
}

//

int RayTriangle(float OX, float OY, float OZ,
                float DX, float DY, float DZ,
                float X1, float Y1, float Z1,
                float X2, float Y2, float Z2,
                float X3, float Y3, float Z3)
{
  float R, S, T, U, V;

  Sub(1,X2,Y2,Z2,X1,Y1,Z1);
  Sub(2,X3,Y3,Z3,X1,Y1,Z1);
  
  Cross(3,DX,DY,DZ,Vector[2,0],Vector[2,1],Vector[2,2]);

  R = Dot(Vector[1,0],Vector[1,1],Vector[1,2],Vector[3,0],Vector[3,1],Vector[3,2]);

  Sub(4,OX,OY,OZ,X1,Y1,Z1);
  S = 1/R;
  
  Cross(5,Vector[4,0],Vector[4,1],Vector[4,2],Vector[1,0],Vector[1,1],Vector[1,2]);
  
  if(R <= Epsilon && R >= Epsilon*-1)
  {
    return 0;
  }
  else
  {
    if(R > Epsilon)
    {
      Debug = U;
      U = Dot(Vector[4,0],Vector[4,1],Vector[4,2],Vector[3,0],Vector[3,1],Vector[3,2]);
      if(U < 0 || U > R)
      {
        return 0;
      }

      V = Dot(DX,DY,DZ,Vector[5,0],Vector[5,1],Vector[5,2]);
      if(V < 0 || U+V > R)
      {
        return 0;
      }
    }

    if(R < Epsilon*-1)
    {
      U = Dot(Vector[4,0],Vector[4,1],Vector[4,2],Vector[3,0],Vector[3,1],Vector[3,2]);
      if(U > 0 || U < R)
      {
        return 0;
      }

      V = Dot(DX,DY,DZ,Vector[5,0],Vector[5,1],Vector[5,2]);
      if(V > 0 || U+V < R)
      {
        return 0;
      }
    }
  }
  
  T = Dot(Vector[2,0],Vector[2,1],Vector[2,2],Vector[5,0],Vector[5,1],Vector[5,2]);
  U *= S;
  V *= S;
  
  return 1;
}

Code: Select all

if(this.Vertex.X > 0)
{
  this.Vertex.X = 1;
  this.Vertex.Y = 0;
}