Question

编译以下代码时......

package camera

type camera struct {
    position [3]float64
    viewWidth int
    viewHeight int
}

func (c camera) SwitchToCartesianThreeSpace(x, y int) [3]float64 { // LINE 9
    var x3 float64 = 0 // view is set to the origin
    var y3 float64 = float64(x) - (float64(c.viewWidth) / 2)
    var z3 float64 = float64(-y) + (float64(c.viewHeight) / 2)
    result := [3]float64{x3, y3, z3}                               // LINE 13
    return result
}

......发生以下错误。

camera/camera.go:9: undefined: x
camera/camera.go:9: undefined: y
camera/camera.go:11: undefined: x
camera/camera.go:12: undefined: y
camera/camera.go:13: cannot use x3 (type float64) as type [3]float64 in array element
camera/camera.go:13: cannot use y3 (type float64) as type [3]float64 in array element
camera/camera.go:13: cannot use z3 (type float64) as type [3]float64 in array element

到目前为止，我已经编写了大量的Go代码，并且不明白为什么第9行的错误或第13行的错误正在发生！有谁能解释？

Answer 1

隔离in a playgroud，它编译得很好，并且具有预期的输出：

c := camera{}
res := c.SwitchToCartesianThreeSpace(2, 3)
// res is [0 2 -3]

您需要尝试camera.go仅包含该代码，或检查camera.go文件在current workspace中的适用方式。

Go方法参数和float64数组给出意外错误

1 个答案: