commit 356043566b7e4dde94e5303fddf50563d7909aea
parent 93f8ef6a0726d3491a60a37052cb80b8c30bc5e0
Author: Brian C. Lane <bcl@brianlane.com>
Date: Sun, 12 Apr 2020 16:21:22 -0700
Add pattern file type detection
Support Life 1.05 and Plaintext formats initially.
https://www.conwaylife.com/wiki/Category:File_formats
Diffstat:
| M | main.go | | | 96 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------ |
1 file changed, 74 insertions(+), 22 deletions(-)
diff --git a/main.go b/main.go
@@ -1,6 +1,9 @@
+// sdl2-life
+// by Brian C. Lane <bcl@brianlane.com>
package main
import (
+ "bufio"
"flag"
"fmt"
"log"
@@ -20,30 +23,32 @@ const (
/* commandline flags */
type cmdlineArgs struct {
- Width int // Width of window in pixels
- Height int // Height of window in pixels
- Rows int // Number of cell rows
- Columns int // Number of cell columns
- Seed int64 // Seed for PRNG
- Border bool // Border around cells
- Font string // Path to TTF to use for status bar
- FontSize int // Size of font in points
- Rule string // Rulestring to use
- Fps int // Frames per Second
+ Width int // Width of window in pixels
+ Height int // Height of window in pixels
+ Rows int // Number of cell rows
+ Columns int // Number of cell columns
+ Seed int64 // Seed for PRNG
+ Border bool // Border around cells
+ Font string // Path to TTF to use for status bar
+ FontSize int // Size of font in points
+ Rule string // Rulestring to use
+ Fps int // Frames per Second
+ PatternFile string // File with initial pattern
}
/* commandline defaults */
var cfg = cmdlineArgs{
- Width: 500,
- Height: 500,
- Rows: 100,
- Columns: 100,
- Seed: 0,
- Border: false,
- Font: "",
- FontSize: 14,
- Rule: "B3/S23",
- Fps: 10,
+ Width: 500,
+ Height: 500,
+ Rows: 100,
+ Columns: 100,
+ Seed: 0,
+ Border: false,
+ Font: "",
+ FontSize: 14,
+ Rule: "B3/S23",
+ Fps: 10,
+ PatternFile: "",
}
/* parseArgs handles parsing the cmdline args and setting values in the global cfg struct */
@@ -58,6 +63,7 @@ func parseArgs() {
flag.IntVar(&cfg.FontSize, "font-size", cfg.FontSize, "Size of font in points")
flag.StringVar(&cfg.Rule, "rule", cfg.Rule, "Rulestring Bn.../Sn... (B3/S23)")
flag.IntVar(&cfg.Fps, "fps", cfg.Fps, "Frames per Second update rate (10fps)")
+ flag.StringVar(&cfg.PatternFile, "pattern", cfg.PatternFile, "File with initial pattern to load")
flag.Parse()
}
@@ -111,8 +117,39 @@ func (g *LifeGame) cleanup() {
sdl.Quit()
}
-// InitializeCells resets the world to a random state
+// InitializeCells resets the world, either randomly or from a pattern file
func (g *LifeGame) InitializeCells() {
+ g.age = 0
+
+ if len(cfg.PatternFile) == 0 {
+ g.InitializeRandomCells()
+ return
+ }
+
+ // Read all of the pattern file for parsing
+ f, err := os.Open(cfg.PatternFile)
+ if err != nil {
+ log.Fatalf("Error reading pattern file: %s", err)
+ }
+ defer f.Close()
+
+ scanner := bufio.NewScanner(f)
+ if !scanner.Scan() {
+ log.Fatalf("%s is empty.", cfg.PatternFile)
+ }
+ header := scanner.Text()
+ if strings.HasPrefix(header, "#Life 1.05") {
+ g.cells, err = ParseLife105(scanner)
+ } else if strings.HasPrefix(header, "#Life 1.06") {
+ log.Fatal("Life 1.06 file format is not supported")
+ } else if strings.HasPrefix(header, "!Name:") {
+ g.cells, err = ParsePlaintext(scanner)
+ }
+}
+
+// InitializeRandomCells resets the world to a random state
+func (g *LifeGame) InitializeRandomCells() {
+
if cfg.Seed == 0 {
seed := time.Now().UnixNano()
log.Printf("seed = %d\n", seed)
@@ -122,7 +159,6 @@ func (g *LifeGame) InitializeCells() {
rand.Seed(cfg.Seed)
}
- g.age = 0
g.cells = make([][]*Cell, cfg.Rows, cfg.Rows)
for x := 0; x < cfg.Rows; x++ {
for y := 0; y < cfg.Columns; y++ {
@@ -135,6 +171,22 @@ func (g *LifeGame) InitializeCells() {
}
}
+// ParseLife105 pattern file
+// The header has already been read from the buffer when this is called
+func ParseLife105(scanner *bufio.Scanner) ([][]*Cell, error) {
+ cells := make([][]*Cell, cfg.Rows, cfg.Rows)
+
+ return cells, nil
+}
+
+// ParsePlaintext pattern file
+// The header has already been read from the buffer when this is called
+func ParsePlaintext(scanner *bufio.Scanner) ([][]*Cell, error) {
+ cells := make([][]*Cell, cfg.Rows, cfg.Rows)
+
+ return cells, nil
+}
+
// checkState determines the state of the cell for the next tick of the game.
func (g *LifeGame) checkState(c *Cell) {
liveCount := g.liveNeighbors(c)
