commit 45dd30104a1086ba08c9d0db0c8cdd46db2a146d
parent 1ee234bf637554ad39ce22f7b64e52180273a7b0
Author: Brian C. Lane <bcl@brianlane.com>
Date: Sat, 3 Dec 2022 09:50:36 -0800
Add color support
This adds the option to color the cells based on their age. Currently it
is just a copy of the same color function used in Mazes for Programmers.
Adds a -color cmdline option, and a 'c' key to toggle the color option.
Diffstat:
| M | main.go | | | 28 | ++++++++++++++++++++++++++++ |
1 file changed, 28 insertions(+), 0 deletions(-)
diff --git a/main.go b/main.go
@@ -42,6 +42,7 @@ type cmdlineArgs struct {
PatternFile string // File with initial pattern
Pause bool // Start the game paused
Empty bool // Start with empty world
+ Color bool // Color the cells based on age
Port int // Port to listen to
Host string // Host IP to bind to
Server bool // Launch an API server when true
@@ -62,6 +63,7 @@ var cfg = cmdlineArgs{
PatternFile: "",
Pause: false,
Empty: false,
+ Color: false,
Port: 3051,
Host: "127.0.0.1",
Server: false,
@@ -82,6 +84,7 @@ func parseArgs() {
flag.StringVar(&cfg.PatternFile, "pattern", cfg.PatternFile, "File with initial pattern to load")
flag.BoolVar(&cfg.Pause, "pause", cfg.Pause, "Start the game paused")
flag.BoolVar(&cfg.Empty, "empty", cfg.Empty, "Start with empty world")
+ flag.BoolVar(&cfg.Color, "color", cfg.Color, "Color cells based on age")
flag.IntVar(&cfg.Port, "port", cfg.Port, "Port to listen to")
flag.StringVar(&cfg.Host, "host", cfg.Host, "Host IP to bind to")
flag.BoolVar(&cfg.Server, "server", cfg.Server, "Launch an API server")
@@ -527,6 +530,22 @@ func (g *LifeGame) liveNeighbors(c *Cell) (int, int) {
return liveCount, 0
}
+// SetColorFromAge uses the cell's age to color it
+func (g *LifeGame) SetColorFromAge(age int) {
+
+ // Based on the coloring algorithm used in Mazes for Programmers
+ // Except that I don't have a max distance here
+ maxAge := float64(255)
+ if float64(age) > maxAge {
+ age = 255
+ }
+
+ intensity := (maxAge - float64(age)) / maxAge
+ dark := uint8(255 * intensity)
+ bright := uint8(128 + 127*intensity)
+ g.renderer.SetDrawColor(dark, bright, dark, 255)
+}
+
// Draw draws the current state of the world
func (g *LifeGame) Draw(status string) {
// Clear the world to the background color
@@ -539,6 +558,9 @@ func (g *LifeGame) Draw(status string) {
if !c.alive {
continue
}
+ if cfg.Color {
+ g.SetColorFromAge(c.age)
+ }
g.DrawCell(*c)
}
}
@@ -580,6 +602,9 @@ func (g *LifeGame) UpdateCell(x, y int, erase bool) {
// UpdateStatus draws the status bar
func (g *LifeGame) UpdateStatus(status string) {
+ if len(status) == 0 {
+ return
+ }
text, err := g.font.RenderUTF8Solid(status, sdl.Color{255, 255, 255, 255})
if err != nil {
log.Printf("Failed to render text: %s\n", err)
@@ -633,6 +658,7 @@ func (g *LifeGame) NextFrame() {
func ShowKeysHelp() {
fmt.Println("h - Print help")
fmt.Println("<space> - Toggle pause/play")
+ fmt.Println("c - Toggle color")
fmt.Println("q - Quit")
fmt.Println("s - Single step")
fmt.Println("r - Reset the game")
@@ -667,6 +693,8 @@ func (g *LifeGame) Run() {
oneStep = true
case sdl.K_r:
g.InitializeCells()
+ case sdl.K_c:
+ cfg.Color = !cfg.Color
}
}
