glVertex2d

関数

頂点を倍精度の2次元座標で指定する。

DLLOPENGL32.dll呼出規約winapi

シグネチャ

// OPENGL32.dll
#include <windows.h>

void glVertex2d(
    DOUBLE x,
    DOUBLE y
);

パラメーター

名前	型	方向
x	DOUBLE	in
y	DOUBLE	in

戻り値の型: void

各言語での呼び出し定義

// OPENGL32.dll
#include <windows.h>

void glVertex2d(
    DOUBLE x,
    DOUBLE y
);

[DllImport("OPENGL32.dll", ExactSpelling = true)]
static extern void glVertex2d(
    double x,   // DOUBLE
    double y   // DOUBLE
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glVertex2d(
    x As Double,   ' DOUBLE
    y As Double   ' DOUBLE
)
End Sub

' x : DOUBLE
' y : DOUBLE
Declare PtrSafe Sub glVertex2d Lib "opengl32" ( _
    ByVal x As Double, _
    ByVal y As Double)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glVertex2d = ctypes.windll.opengl32.glVertex2d
glVertex2d.restype = None
glVertex2d.argtypes = [
    ctypes.c_double,  # x : DOUBLE
    ctypes.c_double,  # y : DOUBLE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glVertex2d = Fiddle::Function.new(
  lib['glVertex2d'],
  [
    Fiddle::TYPE_DOUBLE,  # x : DOUBLE
    Fiddle::TYPE_DOUBLE,  # y : DOUBLE
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glVertex2d(
        x: f64,  // DOUBLE
        y: f64  // DOUBLE
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glVertex2d(double x, double y);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glVertex2d' -Namespace Win32 -PassThru
# $api::glVertex2d(x, y)

#uselib "OPENGL32.dll"
#func global glVertex2d "glVertex2d" double, double
; glVertex2d x, y
; x : DOUBLE -> "double"
; y : DOUBLE -> "double"

#uselib "OPENGL32.dll"
#func global glVertex2d "glVertex2d" double, double
; glVertex2d x, y
; x : DOUBLE -> "double"
; y : DOUBLE -> "double"

; void glVertex2d(DOUBLE x, DOUBLE y)
#uselib "OPENGL32.dll"
#func global glVertex2d "glVertex2d" double, double
; glVertex2d x, y
; x : DOUBLE -> "double"
; y : DOUBLE -> "double"

import (
	"math"
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglVertex2d = opengl32.NewProc("glVertex2d")
)

// x (DOUBLE), y (DOUBLE)
r1, _, err := procglVertex2d.Call(
	uintptr(math.Float64bits(x)),
	uintptr(math.Float64bits(y)),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void
// 注意: float/double 引数は proc.Call では XMM レジスタに渡せません。
// windows.SyscallN(proc.Addr(), math.Float64bits(x), ...) もしくは cgo を使用してください。

procedure glVertex2d(
  x: Double;   // DOUBLE
  y: Double   // DOUBLE
); stdcall;
  external 'OPENGL32.dll' name 'glVertex2d';

result := DllCall("OPENGL32\glVertex2d"
    , "Double", x   ; DOUBLE
    , "Double", y   ; DOUBLE
    , "Int")   ; return: void

●glVertex2d(x, y) = DLL("OPENGL32.dll", "int glVertex2d(double, double)")
# 呼び出し: glVertex2d(x, y)
# x : DOUBLE -> "double"
# y : DOUBLE -> "double"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。