mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-16 05:05:11 +00:00
104 lines
2.3 KiB
Verilog
104 lines
2.3 KiB
Verilog
|
|
`ifndef SPRITE_BITMAP_H
|
|
`define SPRITE_BITMAP_H
|
|
|
|
`include "hvsync_generator.v"
|
|
|
|
/*
|
|
Simple sprite renderer example.
|
|
|
|
car_bitmap - ROM for a car sprite.
|
|
sprite_bitmap_top - Example sprite rendering module.
|
|
*/
|
|
|
|
module car_bitmap(yofs, bits);
|
|
|
|
input [3:0] yofs;
|
|
output [7:0] bits;
|
|
|
|
reg [7:0] bitarray[0:15];
|
|
|
|
assign bits = bitarray[yofs];
|
|
|
|
initial begin/*{w:8,h:16}*/
|
|
bitarray[0] = 8'b0;
|
|
bitarray[1] = 8'b1100;
|
|
bitarray[2] = 8'b11001100;
|
|
bitarray[3] = 8'b11111100;
|
|
bitarray[4] = 8'b11101100;
|
|
bitarray[5] = 8'b11100000;
|
|
bitarray[6] = 8'b1100000;
|
|
bitarray[7] = 8'b1110000;
|
|
bitarray[8] = 8'b110000;
|
|
bitarray[9] = 8'b110000;
|
|
bitarray[10] = 8'b110000;
|
|
bitarray[11] = 8'b1101110;
|
|
bitarray[12] = 8'b11101110;
|
|
bitarray[13] = 8'b11111110;
|
|
bitarray[14] = 8'b11101110;
|
|
bitarray[15] = 8'b101110;
|
|
end
|
|
|
|
endmodule
|
|
|
|
module sprite_bitmap_top(clk, reset, hsync, vsync, rgb);
|
|
|
|
input clk, reset;
|
|
output hsync, vsync;
|
|
output [2:0] rgb;
|
|
wire display_on;
|
|
wire [8:0] hpos;
|
|
wire [8:0] vpos;
|
|
|
|
reg sprite_active;
|
|
reg [3:0] car_sprite_xofs;
|
|
reg [3:0] car_sprite_yofs;
|
|
wire [7:0] car_sprite_bits;
|
|
|
|
reg [8:0] player_x = 128;
|
|
reg [8:0] player_y = 128;
|
|
|
|
hvsync_generator hvsync_gen(
|
|
.clk(clk),
|
|
.reset(reset),
|
|
.hsync(hsync),
|
|
.vsync(vsync),
|
|
.display_on(display_on),
|
|
.hpos(hpos),
|
|
.vpos(vpos)
|
|
);
|
|
|
|
car_bitmap car(
|
|
.yofs(car_sprite_yofs),
|
|
.bits(car_sprite_bits));
|
|
|
|
// start Y counter when we hit the top border (player_y)
|
|
always @(posedge hsync)
|
|
if (vpos == player_y)
|
|
car_sprite_yofs <= 15;
|
|
else if (car_sprite_yofs != 0)
|
|
car_sprite_yofs <= car_sprite_yofs - 1;
|
|
|
|
// restart X counter when we hit the left border (player_x)
|
|
always @(posedge clk)
|
|
if (hpos == player_x)
|
|
car_sprite_xofs <= 15;
|
|
else if (car_sprite_xofs != 0)
|
|
car_sprite_xofs <= car_sprite_xofs - 1;
|
|
|
|
// mirror sprite in X direction
|
|
wire [3:0] car_bit = car_sprite_xofs>=8 ?
|
|
15-car_sprite_xofs:
|
|
car_sprite_xofs;
|
|
|
|
wire car_gfx = car_sprite_bits[car_bit[2:0]];
|
|
|
|
wire r = display_on && car_gfx;
|
|
wire g = display_on && car_gfx;
|
|
wire b = display_on && car_gfx;
|
|
assign rgb = {b,g,r};
|
|
|
|
endmodule
|
|
|
|
`endif
|