// Need to determine Lines end point//  using an angle, magnitude, and origin  radians = (angle * 180) / PI_CONSTANT; // convert to radians if angle is in degrees  end.x=(cos(radians)*length) + origin.x;  end.y=(sin(radians)*length) + origin.y;// use a normal line plotter to plot the line between the points  line(origin,end);  

  // input://  origin - is a point structure//  lenght - is the number of pixels plotted//   angle - must be in radiansvoid drawline(point origin, int lenght, float angle){ int x_adder,y_adder; int x_direction,y_direction; char far *offset;// Check for an invalid line length if(lenght<1){return;} // these two calculations could be made into an evil LUT (could speed it up nicely)//  MAX_VALUE_ACCUM_DATATYPE_WILL_ALLOW should be//  32767 for 16 bit signed int or 2147483647 for 32 bit signed int// this will provide the best accurracy I can think of  x_adder = cos(angle) * MAX_VALUE_ACCUM_DATATYPE_WILL_ALLOW;  y_adder = sin(angle) * MAX_VALUE_ACCUM_DATATYPE_WILL_ALLOW;// Check for negative directions  if(x_adder<0)  {x_adder = -x_adder;   x_direction = -1;   }  else  {x_direction = 1;   }  if(y_adder<0)  {y_adder = -y_adder;   y_direction = -PITCH_CONSTANT;  }  else  {y_direction = PITCH_CONSTANT;   }// initialize the accumulators  x_accum = 0;  y_accum = 0;// calculate origin''s memory offset offset = (char far *)&videobuffer[(origin.y*(pitch/bytes_per_pixel)+origin.x]// Plotting the line while(lenght--) { // plot pixel   *(desired pointer type cast)offset = pixel_color; // Update X movement for next pixel   x_accum += x_adder; // Check X movement   while(x_accum>=MAX_VALUE_ACCUM_DATATYPE_WILL_ALLOW)   {offset+=x_direction;    x_accum -= MAX_VALUE_ACCUM_DATATYPE_WILL_ALLOW;   } // Update Y movement for the next pixel   y_accum += y_adder; // Check Y movement   while(y_accum>=MAX_VALUE_ACCUM_DATATYPE_WILL_ALLOW)   {offset+=y_direction;    y_accum -= MAX_VALUE_ACCUM_DATATYPE_WILL_ALLOW;   } }// end of drawline  return;}