triangulov2.v

module triangulov2(
  		 input 	      CLOCK_50,
		 input [3:0]  KEY,
  		 output [3:0] VGA_R,
  		 output [3:0] VGA_G,
		 output [3:0] VGA_B,
 		 output       VGA_HS,
		 output       VGA_VS);
   
   reg signed [23:0] 		      cx = 0;
   reg signed [23:0] 		      cy = 0;		      
   reg signed [23:0] 		      p1_x = 300;
   reg signed [23:0] 		      p1_y = 100;
   reg signed [23:0] 		      p2_x = 400;
   reg signed [23:0] 		      p2_y = 300;
   reg signed [23:0] 		      p3_x = 600;
   reg signed [23:0] 		      p3_y = 200;
   reg [28:0] 			      cont = 0;
   reg [1:0] 			      cc = 0;
   
   
   
   assign VGA_R = v ? (tr ? 4'hc : 4'h0) : 4'b0;
   assign VGA_G = v ? (tr ? 4'hc : 4'h0) : 4'b0;
   assign VGA_B = v ? (tr ? 4'hc : 4'h0) : 4'b0;

   
   
   
   wire 			      v = (cx >= 285) & (cx < 1555) & (cy >= 35) & (cy < 515);
   wire 			      tr = ((p2_x - p1_x) * (cy - p1_y) -(cx - p1_x) * (p2_y - p1_y)) <= 0 &&
				              ((p3_x - p2_x) * (cy - p2_y) -(cx - p2_x) * (p3_y - p2_y)) <= 0 &&
				              ((p1_x - p3_x) * (cy - p3_y) -(cx - p3_x) * (p1_y - p3_y)) <= 0;
     
   
   reg [10:0] 			      c = 10;
   assign VGA_HS = cx >= 190;
   assign VGA_VS = cy >= 2;
   
   always @(posedge CLOCK_50) begin
      cont = cont + 1;
      if(cont == 35000000) begin
	 cc = cc + 1;
	 cont = 0;
      end
      if(cc == 0) begin
	 p1_x = 300;
 	 p1_y = 100;
 	 p2_x = 400;
	 p2_y = 300;
	 p3_x = 600;
	 p3_y = 200;
      end
      else if(cc == 1) begin
	 p1_x = 300;
 	 p1_y = 100;
 	 p2_x = 600;
	 p2_y = 400;
	 p3_x = 800;
	 p3_y = 350;
	end
      else if(cc == 2) begin
	 p1_x = 300;
 	 p1_y = 100;
 	 p2_x = 1000;
	 p2_y = 500;
	 p3_x = 1400;
	 p3_y = 300;
      end
		else if(cc == 3) begin
	 p1_x = 300;
 	 p1_y = 100;
 	 p2_x = 1000;
	 p2_y = 500;
	 p3_x = 1400;
	 p3_y = 100;
      end
      if (cx == 1585) 
	begin
           if (cy == 525) begin
	      cy <= 0;
           end
	   else 
	     cy <= cy + 1;
	   cx <= 0;
	end
      else 
	begin
	   cx <= cx + 1;
	end
   end
endmodule