automated snapshot

field.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	rl "github.com/gen2brain/raylib-go/raylib"
 	"github.com/ojrac/opensimplex-go"
 )
@@ -46,7 +47,7 @@ func (f *SimplexNoiseField) Get(x, y float32) float32 {
 type ImageField struct {
 	image            *rl.Image
 	pixels           ImagePixels
-	offsetX, offsetY float32
+	offsetX, offsetY int
 }
 
 type ImagePixels struct {
@@ -66,14 +67,15 @@ func (p *ImagePixels) Get(x, y int) rl.Color {
 
 func NewImageField(path string) ImageField {
 	image := rl.LoadImage(path)
+	fmt.Printf("loaded image from %s\n", path)
 	colors := rl.LoadImageColors(image)
 	pixels := ImagePixels{
 		w:      int(image.Width),
 		h:      int(image.Height),
 		colors: colors,
 	}
-	offsetX := float32(image.Width / 2)
-	offsetY := float32(image.Height / 2)
+	offsetX := int(image.Width)/2
+	offsetY := int(image.Height)/2
 	return ImageField{
 		image:   image,
 		pixels:  pixels,
@@ -82,8 +84,9 @@ func NewImageField(path string) ImageField {
 	}
 }
 
+// zero centered
 func (f *ImageField) Get(x, y float32) float32 {
 	// todo : blend colors
-	c := f.pixels.Get(int(x+f.offsetX), int(y+f.offsetY))
+	c := f.pixels.Get(int(x+float32(f.offsetX)), int(y+float32(f.offsetY)))
 	return Brightness(c)
 }