glEvalCoord2f

関数

2次元エバリュエータを単精度座標で評価する。

DLLOPENGL32.dll呼出規約winapi

シグネチャ

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

void glEvalCoord2f(
    FLOAT u,
    FLOAT v
);

パラメーター

名前	型	方向
u	FLOAT	in
v	FLOAT	in

戻り値の型: void

各言語での呼び出し定義

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

void glEvalCoord2f(
    FLOAT u,
    FLOAT v
);

[DllImport("OPENGL32.dll", ExactSpelling = true)]
static extern void glEvalCoord2f(
    float u,   // FLOAT
    float v   // FLOAT
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glEvalCoord2f(
    u As Single,   ' FLOAT
    v As Single   ' FLOAT
)
End Sub

' u : FLOAT
' v : FLOAT
Declare PtrSafe Sub glEvalCoord2f Lib "opengl32" ( _
    ByVal u As Single, _
    ByVal v As Single)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glEvalCoord2f = ctypes.windll.opengl32.glEvalCoord2f
glEvalCoord2f.restype = None
glEvalCoord2f.argtypes = [
    ctypes.c_float,  # u : FLOAT
    ctypes.c_float,  # v : FLOAT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glEvalCoord2f = Fiddle::Function.new(
  lib['glEvalCoord2f'],
  [
    Fiddle::TYPE_FLOAT,  # u : FLOAT
    Fiddle::TYPE_FLOAT,  # v : FLOAT
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glEvalCoord2f(
        u: f32,  // FLOAT
        v: f32  // FLOAT
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glEvalCoord2f(float u, float v);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glEvalCoord2f' -Namespace Win32 -PassThru
# $api::glEvalCoord2f(u, v)

#uselib "OPENGL32.dll"
#func global glEvalCoord2f "glEvalCoord2f" float, float
; glEvalCoord2f u, v
; u : FLOAT -> "float"
; v : FLOAT -> "float"

#uselib "OPENGL32.dll"
#func global glEvalCoord2f "glEvalCoord2f" float, float
; glEvalCoord2f u, v
; u : FLOAT -> "float"
; v : FLOAT -> "float"

; void glEvalCoord2f(FLOAT u, FLOAT v)
#uselib "OPENGL32.dll"
#func global glEvalCoord2f "glEvalCoord2f" float, float
; glEvalCoord2f u, v
; u : FLOAT -> "float"
; v : FLOAT -> "float"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglEvalCoord2f = opengl32.NewProc("glEvalCoord2f")
)

// u (FLOAT), v (FLOAT)
r1, _, err := procglEvalCoord2f.Call(
	uintptr(math.Float32bits(u)),
	uintptr(math.Float32bits(v)),
)
_ = 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 glEvalCoord2f(
  u: Single;   // FLOAT
  v: Single   // FLOAT
); stdcall;
  external 'OPENGL32.dll' name 'glEvalCoord2f';

result := DllCall("OPENGL32\glEvalCoord2f"
    , "Float", u   ; FLOAT
    , "Float", v   ; FLOAT
    , "Int")   ; return: void

●glEvalCoord2f(u, v) = DLL("OPENGL32.dll", "int glEvalCoord2f(float, float)")
# 呼び出し: glEvalCoord2f(u, v)
# u : FLOAT -> "float"
# v : FLOAT -> "float"
# 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)。