Rename view-map to minimap and work on a real view-map

internal/conv/object.go

@@ -43,6 +43,8 @@ func ConvertObject(rawObj *data.Object, name string) *Object {
 	return out
 }
 
+var transparent = color.RGBA{0, 0, 0, 0}
+
 // WIP. Try to convert the pixeldata into a picture.
 func spriteToPic(sprite *data.Sprite) *pixel.PictureData {
 	pic := pixel.MakePictureData(pixel.R(float64(0), float64(0), float64(sprite.Width), float64(sprite.Height)))
@@ -77,9 +79,14 @@ func spriteToPic(sprite *data.Sprite) *pixel.PictureData {
 
 		// Ignore the record separator
 		rowData = rowData[0 : len(rowData)-1]
-
 		leftPad := (int(sprite.Width) - len(rowData)) / 2
 
+		// Set all bytes to be transparent by default
+		for allX := 0; allX < int(sprite.Width); allX++ {
+			idx := pic.Index(pixel.V(float64(allX), float64(y)))
+			pic.Pix[idx] = transparent
+		}
+
 		for x, b := range rowData {
 			idx := pic.Index(pixel.V(float64(leftPad+x), float64(y)))
 			r, g, b, a := data.ColorPalette[int(b)].RGBA()