使用 4*4*4 的控制点

pkg/producer/grid_img.go

@@ -21,8 +21,9 @@ func gridImage2(m, n, height, width, k, hmin, hmax int) []*GridPoint {
 	hmax = hmax + 500
 	hmin = hmin - 500
 	dh := (hmax - hmin) / (k)
+
 	var h []int
-	for i := 1; i <= k; i++ {
+	for i := 0; i <= k; i++ {
 		h = append(h, hmin+dh*i)
 	}