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/branches/ver0branch/gridCube.vhd
0,0 → 1,158
-- Author : Julian Andres Guarin Reyes.
-- Project : JART, Just Another Ray Tracer.
-- email : jguarin2002 at gmail.com, j.guarin at javeriana.edu.co
 
-- This code was entirely written by Julian Andres Guarin Reyes.
-- The following code is licensed under GNU Public License
-- http://www.gnu.org/licenses/gpl-3.0.txt.
 
-- This file is part of JART (Just Another Ray Tracer).
 
-- JART (Just Another Ray Tracer) is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
 
-- JART (Just Another Ray Tracer) is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
 
-- You should have received a copy of the GNU General Public License
-- along with JART (Just Another Ray Tracer). If not, see <http://www.gnu.org/licenses/>.
 
-- This is it!!!!! The following code represents the whole blocks gathered all together.
-- This block represents a processing cube. The cube's height is always 3 (floor 0 to floor 2). The cube width
-- is the number of spheres under intersection test each clock. The cube depth represents the number or rays under
-- intersection test each clock.
 
-- Details on the cube outputs interpretation, can be found at BlackBook.pdf
 
 
library ieee;
use ieee.std_logic_1164.all;
use work.powerGrid.all;
 
entity gridCube is
generic (
-- Depth
D : integer := 4;
-- ID width.
IDW : integer := 2;
-- Number of Columns.
C : integer := 4;
-- Input rays width.
W0 : integer := 18;
-- Dot products and spheres constant width
W1 : integer := 32; IDW : integer := 2;
);
port (
-- The usual control signals.
clk,rst : in std_logic;
-- Grid, rays and sphere flow through control signals.
pipeOn : in std_logic;
-- The same column nxtSphere signal control..... regardless the Cube Depth.
nxtSphere : in std_logic_vector (C-1 downto 0);
-- R-F0
-- Input Values.
-- The ray input vector.
iRayx: in std_logic_vector (D*W0 - 1 downto 0);
iRayy: in std_logic_vector (D*W0 - 1 downto 0);
iRayz: in std_logic_vector (D*W0 - 1 downto 0);
-- The spheres x position (sphere centers) input vectors.
iSphrCenterx: in std_logic_vector (C*W0 - 1 downto 0);
-- The spheres y position (sphere centers) input vectors.
iSphrCentery: in std_logic_vector (C*W0 - 1 downto 0);
-- The spheres z position (sphere centers) input vectors.
iSphrCenterz: in std_logic_vector (C*W0 - 1 downto 0);
-- The spheres x position (sphere centers) output vectors.
oSphrCenterx: out std_logic_vector (C*W0 - 1 downto 0);
-- The spheres y positions (sphere centes) output vectors.
oSphrCentery: out std_logic_vector (C*W0 - 1 downto 0);
-- The spheres z positions (sphere centers) output vectors.
oSphrCenterz: out std_logic_vector (C*W0 - 1 downto 0);
-- Output Values
-- The ray output vector.
oRayx: out std_logic_vector (D*W0 - 1 downto 0);
oRayy: out std_logic_vector (D*W0 - 1 downto 0);
oRayz: out std_logic_vector (D*W0 - 1 downto 0);
-- R-F1
-- K Input / Output.
kInput : in std_logic_vector (C*W1 - 1 downto 0);
kOutput : out std_logic_vector (C*W1 - 1 downto 0)
--R-F2
-- Input Values
refvd : in std_logic_vector (D*W1-1 downto 0);
selvd : out std_logic_vector (D*W1-1 downto 0);
colid : out std_logic_vector (D*IDW-1 downto 0);
inter : out std_logic_vector (D-1 downto 0)
);
end entity;
 
architecture rtl of gridCube is
 
-- Difussion nets for sphere constant and center .
signal sK : std_logic_vector ((D+1)*C*W1 - 1 downto 0);
signal sVx : std_logic_vector ((D+1)*C*W0 - 1 downto 0);
signal sVy : std_logic_vector ((D+1)*C*W0 - 1 downto 0);
signal sVz : std_logic_vector ((D+1)*C*W0 - 1 downto 0);
 
begin
 
-- External connections : K constant.
sK (C*W1-1 downto 0) <= kInput;
kOutput <= sK ((D+1)*C*W1-1 downto D*C*W1-1);
-- External connections : Sphere Center.
sVx (C*W0-1 downto 0) <= iSphereCenterx;
sVy (C*W0-1 downto 0) <= iSphereCentery;
sVz (C*W0-1 downto 0) <= iSphereCenterz;
oRayx <= sVx ((D+1)*C*W0-1 downto D*C*W0-1);
oRayy <= sVy ((D+1)*C*W0-1 downto D*C*W0-1);
oRayz <= sVz ((D+1)*C*W0-1 downto D*C*W0-1);
 
gridArray: for i in 0 to D-1 generate
gridn: rayxsphereGrid
generic map (
IDW = IDW,
C = C,
W0 = W0,
W1 = W1 );
port map (
clk => clk,
rst => rst,
pipeOn => pipeOn,
nxtSphere => nxtSphere,
iRayx => iRayx ((i+1)*W0-1 downto i*W0),
iRayy => iRayy ((i+1)*W0-1 downto i*W0),
iRayz => iRayz ((i+1)*W0-1 downto i*W0),
iSphrCenterx => sVx((i+1)*C*W0-1 downto i*C*W0),
iSphrCentery => sVy((i+1)*C*W0-1 downto i*C*W0),
iSphrCenterz => sVz((i+1)*C*W0-1 downto i*C*W0),
oSphrCenterx => sVx((i+2)*C*W0-1 downto (i+1)*C*W0),
oSphrCentery => sVy((i+2)*C*W0-1 downto (i+1)*C*W0),
oSphrCenterz => sVz((i+2)*C*W0-1 downto (i+1)*C*W0),
oRayx => oRayx ((i+1)*W0-1 downto i*W0),
oRayy => oRayy ((i+1)*W0-1 downto i*W0),
oRayz => oRayz ((i+1)*W0-1 downto i*W0),
kInput => sK((i+1)*C*W1-1 downto i*C*W1),
kOutput => sK((i+2)*C*W1-1 downto (i+1)*C*W1),
refvd => refvd((i+1)*W1-1 downto i*W1),
selvd => selvd((i+1)*W1-1 downto i*W1),
colid => colid((i+1)*IDW-1 downto i*IDW),
inter => inter(i)
);
end generate;
 
end rtl;

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