Looking to learn more about Technical Illustration

Hey.
If anyone has any information on how I can learn more about Technical Illustration that would be great.  I'm currently looking for work in this field and want to improve my skills in this specialized field.
Thanks.

Monika Gause wrote:
See the tutorials here: http://khulsey.com/
And then pick your jaw up off the floor and start reading them
Mr. Hulsey does incredible work.
Gasp. .. If the next question is, "how would I get started, drawing something like this?", the answer would be "Practice. Practice, and despair."
That semi-transparent sedan is breathtaking.

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    CREATE OR REPLACE PACKAGE "CSV_UTIL"
    as
    By Oleg Lihvoinen:
    Parse and de_quote procedures are taken from AskTom and modified
        type vcArray is table of varchar2(32767) index by binary_integer;
        g_words            vcArray;
        g_empty            vcArray;
        g_last_string    varchar2(32767); 
      procedure parse( p_str      in varchar2,
                       p_enc_by in varchar2,
                       p_sep   in varchar2 );
      procedure upload(p_file_name VARCHAR2, p_collection_name VARCHAR2, p_enc_by IN VARCHAR2, p_sep_by IN VARCHAR2, p_rows NUMBER);
      function de_quote( p_str in varchar2, 
                           p_enc_by in varchar2 )
        return varchar2;
    end;
      CREATE OR REPLACE PACKAGE BODY "CSV_UTIL"
    AS
       FUNCTION de_quote (p_str IN VARCHAR2, p_enc_by IN VARCHAR2)
          RETURN VARCHAR2
       IS
       v_str VARCHAR2(32767) := p_str;
       BEGIN
          IF (p_enc_by IS NULL)
          THEN
             RETURN p_str;
          ELSE
            IF SUBSTR(p_str,-1) = p_enc_by THEN
               v_str := SUBSTR(p_str,1,LENGTH(p_str)-1);
            END IF;
            IF SUBSTR(p_str,1,1) = p_enc_by THEN
               v_str := SUBSTR(v_str,2);
            END IF; 
            RETURN REPLACE (v_str,
                             p_enc_by || p_enc_by,
                             p_enc_by
          END IF;
       END de_quote;
       PROCEDURE parse (p_str IN VARCHAR2, p_enc_by IN VARCHAR2, p_sep IN VARCHAR2)
       IS
          l_n          NUMBER   DEFAULT 1;
          l_in_quote   BOOLEAN  DEFAULT FALSE;
          l_ch         NCHAR (1);
          l_len        NUMBER   DEFAULT NVL (LENGTH (p_str), 0);
       BEGIN
          IF (l_len = 0)
          THEN
             RETURN;
          END IF;
          g_words := g_empty;
          g_words (1) := NULL;
          FOR i IN 1 .. l_len
          LOOP
             l_ch := SUBSTR (p_str, i, 1);
             IF (l_ch = p_enc_by)
             THEN
                l_in_quote := NOT l_in_quote;
             END IF;
             IF (l_ch = p_sep AND NOT l_in_quote)
             THEN
                l_n := l_n + 1;
                g_words (l_n) := NULL;
             ELSE
                g_words (l_n) := g_words (l_n) || l_ch;
             END IF;
          END LOOP;
          g_words (l_n) := de_quote (g_words (l_n), CHR(10));
          g_words (l_n) := de_quote (g_words (l_n), CHR(13));
          FOR i IN 1 .. l_n
          LOOP
             g_words (i) := de_quote (g_words (i), p_enc_by);
          END LOOP;
       END parse;
    Author: Oleg Lihvoinen
    Company: DbSWH
       PROCEDURE upload (p_file_name VARCHAR2, p_collection_name VARCHAR2, p_enc_by IN VARCHAR2, p_sep_by IN VARCHAR2, p_rows NUMBER)
       IS
          v_blob_data    BLOB;
          v_clob_data    CLOB;
          v_clob_len     NUMBER;
          v_position     NUMBER;
          v_char         NCHAR (1);
          c_chunk_len    NUMBER           := 1;
          v_line         VARCHAR2 (32767) := NULL;
          v_data_array   vcarray;
          v_rows         NUMBER           := 0;
          n_seq          NUMBER           := 1;
          dest_offset    NUMBER           := 1;
          src_offset     NUMBER           := 1;
          amount         INTEGER          := DBMS_LOB.lobmaxsize;
          blob_csid      NUMBER           := DBMS_LOB.default_csid;
          lang_ctx       INTEGER          := DBMS_LOB.default_lang_ctx;
          warning        INTEGER;
          l_sep          VARCHAR2(100)    := CASE WHEN p_sep_by = '\t' THEN chr(9) ELSE p_sep_by END;
       BEGIN
          htmldb_collection.create_or_truncate_collection
                                          (p_collection_name      => p_collection_name);
          -- Read blob from wwv_flow_files
          SELECT blob_content
            INTO v_blob_data
            FROM wwv_flow_files
           WHERE NAME = p_file_name;
          v_position := 1;
          DBMS_LOB.createtemporary (lob_loc      => v_clob_data,
                                    CACHE        => TRUE,
                                    dur          => DBMS_LOB.SESSION
          DBMS_LOB.converttoclob (v_clob_data,
                                  v_blob_data,
                                  amount,
                                  dest_offset,
                                  src_offset,
                                  blob_csid,
                                  lang_ctx,
                                  warning
          v_clob_len := DBMS_LOB.getlength (v_clob_data);
          IF v_clob_len = 0 THEN
             RETURN;
          END IF;
          WHILE (v_position <= v_clob_len)
          LOOP
             v_char := DBMS_LOB.SUBSTR (v_clob_data, c_chunk_len, v_position);
             v_line := v_line || v_char;
             v_position := v_position + c_chunk_len;
             -- When the whole line is retrieved and not end of file or end of file
             IF v_char = CHR (10) AND v_position < v_clob_len OR v_position = v_clob_len
             THEN
                parse (p_str => v_line, p_enc_by => p_enc_by, p_sep => l_sep);
                v_data_array := g_words;
                FOR i IN 1..g_words.count LOOP
                   IF i <= 50 THEN
                      v_data_array(i) := g_words(i);
                   ELSE
                      exit;
                   END IF;
                END LOOP;
                FOR i IN g_words.count + 1..50 LOOP
                   v_data_array(i) := null;
                END LOOP;           
                v_rows := v_rows + 1;
                -- exit if uploaded specified number of rows
                IF p_rows IS NOT NULL AND v_rows > p_rows THEN
                   EXIT;
                END IF;
                -- Store data to collection
                n_seq :=
                   htmldb_collection.add_member
                                         (p_collection_name      => p_collection_name,
                                          p_c001                 => v_data_array
                                                                               (1),
                                          p_c002                 => v_data_array
                                                                               (2),
                                          p_c003                 => v_data_array
                                                                               (3),
                                          p_c004                 => v_data_array
                                                                               (4),
                                          p_c005                 => v_data_array
                                                                               (5),
                                          p_c006                 => v_data_array
                                                                               (6),
                                          p_c007                 => v_data_array
                                                                               (7),
                                          p_c008                 => v_data_array
                                                                               (8),
                                          p_c009                 => v_data_array
                                                                               (9),
                                          p_c010                 => v_data_array
                                                                               (10),
                                          p_c011                 => v_data_array
                                                                               (11),
                                          p_c012                 => v_data_array
                                                                               (12),
                                          p_c013                 => v_data_array
                                                                               (13),
                                          p_c014                 => v_data_array
                                                                               (14),
                                          p_c015                 => v_data_array
                                                                               (15),
                                          p_c016                 => v_data_array
                                                                               (16),
                                          p_c017                 => v_data_array
                                                                               (17),
                                          p_c018                 => v_data_array
                                                                               (18),
                                          p_c019                 => v_data_array
                                                                               (19),
                                          p_c020                 => v_data_array
                                                                               (20),
                                          p_c021                 => v_data_array
                                                                               (21),
                                          p_c022                 => v_data_array
                                                                               (22),
                                          p_c023                 => v_data_array
                                                                               (23),
                                          p_c024                 => v_data_array
                                                                               (24),
                                          p_c025                 => v_data_array
                                                                               (25),
                                          p_c026                 => v_data_array
                                                                               (26),
                                          p_c027                 => v_data_array
                                                                               (27),
                                          p_c028                 => v_data_array
                                                                               (28),
                                          p_c029                 => v_data_array
                                                                               (29),
                                          p_c030                 => v_data_array
                                                                               (30),
                                          p_c031                 => v_data_array
                                                                               (31),
                                          p_c032                 => v_data_array
                                                                               (32),
                                          p_c033                 => v_data_array
                                                                               (33),
                                          p_c034                 => v_data_array
                                                                               (34),
                                          p_c035                 => v_data_array
                                                                               (35),
                                          p_c036                 => v_data_array
                                                                               (36),
                                          p_c037                 => v_data_array
                                                                               (37),
                                          p_c038                 => v_data_array
                                                                               (38),
                                          p_c039                 => v_data_array
                                                                               (39),
                                          p_c040                 => v_data_array
                                                                               (40),
                                          p_c041                 => v_data_array
                                                                               (41),
                                          p_c042                 => v_data_array
                                                                               (42),
                                          p_c043                 => v_data_array
                                                                               (43),
                                          p_c044                 => v_data_array
                                                                               (44),
                                          p_c045                 => v_data_array
                                                                               (45),
                                          p_c046                 => v_data_array
                                                                               (46),
                                          p_c047                 => v_data_array
                                                                               (47),
                                          p_c048                 => v_data_array
                                                                               (48),
                                          p_c049                 => v_data_array
                                                                               (49),
                                          p_c050                 => v_data_array
                                                                               (50)                                                                          
                -- Clear the line
                v_line := NULL;
             END IF;
          END LOOP;
       END;
    END;
    This package is from AskTom web site.
    Modified a bit.
      CREATE OR REPLACE PACKAGE "OLS_PRINT_SYLK_FORMAT" as
      type owaSylkArray is table of varchar2(2000);
      procedure show(
          p_query         in varchar2,
          p_parm_names    in owaSylkArray default owaSylkArray(),
          p_parm_values   in owaSylkArray default owaSylkArray(),
          p_sum_column    in owaSylkArray default owaSylkArray(),
          p_max_rows      in number     default 10000,
          p_show_null_as  in varchar2   default null,
          p_show_grid     in varchar2   default 'YES',
          p_show_col_headers in varchar2 default 'YES',
          p_font_name     in varchar2   default 'Courier New',
          p_widths        in owaSylkArray default owaSylkArray(),
          p_titles        in owaSylkArray default owaSylkArray(),
          p_strip_html    in varchar2   default 'YES' );
      procedure show(
          p_cursor        in integer,
          p_sum_column    in owaSylkArray  default owaSylkArray(),
          p_max_rows      in number     default 10000,
          p_show_null_as  in varchar2   default null,
          p_show_grid     in varchar2   default 'YES',
          p_show_col_headers in varchar2 default 'YES',
          p_font_name     in varchar2   default 'Courier New',
          p_widths        in owaSylkArray default owaSylkArray(),
          p_titles        in owaSylkArray default owaSylkArray(),
          p_strip_html    in varchar2   default 'YES' );
      PROCEDURE get_usable_sql (p_sql_in IN VARCHAR2, p_sql_out OUT VARCHAR2);
    end ols_print_sylk_format;
      CREATE OR REPLACE PACKAGE BODY "OLS_PRINT_SYLK_FORMAT" as
      g_cvalue  varchar2(32767);
      g_desc_t dbms_sql.desc_tab2;
      type vc_arr is table of varchar2(2000) index by binary_integer;
      g_lengths vc_arr;
      g_sums vc_arr;
      procedure p( p_str in varchar2 )
      is
      len NUMBER;
      begin
        htp.p(p_str);
        --dbms_output.put_line(p_str);
      exception
        when others then null;
      end;
      function build_cursor(
          q in varchar2,
          n in owaSylkArray,
          v in owaSylkArray ) return integer is
        c integer := dbms_sql.open_cursor;
        i number := 1;
      begin
        dbms_sql.parse (c, q, dbms_sql.native);
        loop
          dbms_sql.bind_variable( c, n(i), v(i) );
          i := i + 1;
        end loop;
        return c;
      exception
        when others then
          return c;
      end build_cursor;
      function str_html ( line in varchar2 ) return varchar2 is
        x       varchar2(32767) := null;
        in_html boolean         := FALSE;
        s       varchar2(3);
      begin
        if line is null then
          return line;
        end if;
        for i in 1 .. length( line ) loop
          s := substr( line, i, 1 );
          if in_html then
            if s = '>' then
              in_html := FALSE;
            end if;
          else
            if s = '<' then
              in_html := TRUE;
            end if;
          end if;
          if not in_html and s != '>' then
            x := x || s;
          end if;
        end loop;
        return x;
      end str_html;
      function ite( b boolean,
                    t varchar2,
                    f varchar2 ) return varchar2 is
      begin
        if b then
          return t;
        else
          return f;
        end if;
      end ite;
      procedure print_comment( p_comment varchar2 ) is
      begin
        return;
        p( ';' || chr(10) || '; ' || p_comment || chr(10) || ';' );
      end print_comment;
      procedure print_heading( font in varchar2,
                               grid in varchar2,
                               col_heading in varchar2,
                               titles in owaSylkArray )
      is
        l_title varchar2(2000);
      begin
        p( 'ID;DBSWHWEBSHOP' );
        print_comment( 'Fonts' );
        p( 'P;F' || font || ';M200' );
        p( 'P;F' || font || ';M200;SB' );
        p( 'P;F' || font || ';M200;SUB' );
        print_comment( 'Global Formatting' );
        --p( 'F;C1;FG0R;SM1' ||
        p( 'F;C1;FG0L;SM0' ||
               ite( upper(grid)='YES', '', ';G' ) ||
               ite( upper(col_heading)='YES', '', ';H' )  );
        for i in 1 .. g_desc_t.count loop
          --p( 'F;C' || to_char(i+1) || ';FG0R;SM0' );
          p( 'F;C' || to_char(i+1) || ';FG0L;SM0' );
        end loop;
        print_comment( 'Title Row' );
        p( 'F;R1;FG0C;SM2' );
        for i in 1 .. g_desc_t.count loop
          g_lengths(i) := g_desc_t(i).col_name_len;
          g_sums(i) := 0;
          begin
            l_title := titles(i);
          exception
            when others then
              l_title := g_desc_t(i).col_name;
          end;
          if i = 1 then
            --p( 'C;Y1;X2;K"' || l_title || '"' );
            p( 'C;Y1;X1;K"' || l_title || '"' );
          else
            --p( 'C;X' || to_char(i+1) || ';K"' || l_title || '"' );
            p( 'C;X' || to_char(i) || ';K"' || l_title || '"' );
          end if;
        end loop;
      end print_heading;
      function print_rows(
          c            in integer,
          max_rows     in number,
          sum_columns  in owaSylkArray,
          show_null_as in varchar2,
          strip_html   in varchar2 ) return number is
        row_cnt number          := 0;
        line    varchar2(32767) := null;
        n       number;
      begin
        loop
          exit when ( row_cnt >= max_rows or
                      dbms_sql.fetch_rows( c ) <= 0 );
          row_cnt := row_cnt + 1;
          print_comment( 'Row ' || row_cnt );
          p( 'C;Y' || to_char(row_cnt+1) );
          for i in 1 .. g_desc_t.count loop
            dbms_sql.column_value( c, i, g_cvalue );
            g_cvalue := trim( both chr(10) from g_cvalue );
            g_cvalue := trim( both chr(13) from g_cvalue );       
            g_cvalue := translate( g_cvalue,
                                chr(13)||chr(10)||chr(9)||';', '    ' );
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                                 str_html( g_cvalue ),
                                 g_cvalue );
            g_lengths(i) := greatest( nvl(length(g_cvalue),
                                      nvl(length(show_null_as),0)),
                                      g_lengths(i) );
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            line := line || ';K';
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              n := to_number( g_cvalue );
              if upper( sum_columns(i)) = 'Y' then
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              end if;
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              when others then
                n := null;
            end;
            line := line ||
                     ite( n is null,
                          ite( g_cvalue is null,
                                   '"'||show_null_as||
                                      '"', '"'||g_cvalue||'"' ),
                                 n );
            p( line );
          end loop;
        end loop;
        return row_cnt;
      end print_rows;
      procedure print_sums(
          sum_columns  in owaSylkArray,
          row_cnt      in number ) is
      begin
        if sum_columns.count = 0 then
          return;
        end if;
        print_comment( 'Totals Row' );
        p( 'C;Y' || to_char(row_cnt + 4) );
        p( 'C;X1;K"Totals:"' );
        for i in 1 .. g_desc_t.count loop
          begin
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        --p( 'F;W1 1 7' );
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          exception
            when others then
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          p_max_rows      in number     default 10000,
          p_show_null_as  in varchar2   default null,
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          p_show_col_headers in varchar2 default 'YES',
          p_font_name     in varchar2   default 'Courier New',
          p_widths        in owaSylkArray default owaSylkArray(),
          p_titles        in owaSylkArray default owaSylkArray(),
          p_strip_html    in varchar2   default 'YES' ) is
        l_row_cnt number;
        l_col_cnt number;
        l_status  number;
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          p_parm_values   in owaSylkArray default owaSylkArray(),
          p_sum_column    in owaSylkArray default owaSylkArray(),
          p_max_rows      in number     default 10000,
          p_show_null_as  in varchar2   default null,
          p_show_grid     in varchar2   default 'YES',
          p_show_col_headers in varchar2 default 'YES',
          p_font_name     in varchar2   default 'Courier New',
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          p_titles        in owaSylkArray default owaSylkArray(),
          p_strip_html    in varchar2   default 'YES' ) is
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              p_widths => p_widths,
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          v_length   NUMBER;
          v_exit     NUMBER;
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             v_sql :=
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      CREATE OR REPLACE PROCEDURE "PRINT_SYLK" AS
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    v_plug_source_type VARCHAR2(32767);
    v_filenm VARCHAR2(2000);
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