在Go中，如何将[16] float32转换为* float32

Question

I am using a math library to handle projection matrix arithmetic.

The OpenGL library that I am using requires "*float32" that represents the matrix. However, what I have available is "[16]float32"

How can I create a *float32 variable and have it point to the beginning of the [16]float32 array?

Thanks.

Answer 1

working sample:

package main

/*
float Add(float *fs)
{
  fs[15]=15.5;
  return fs[0]+fs[1];
}
*/
import "C"

import "fmt"
import "unsafe"

func main() {
    ary := [16]float32{1.5, 2.0}
    fs := (*C.float)(unsafe.Pointer(&ary[0]))
    r := float32(C.Add(fs))
    fmt.Println(r, ary[15]) //3.5 15.5
}