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gluLookAt

関数
視点・注視点・上方向から視野変換行列を設定する。
DLLGLU32.dll呼出規約winapi
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シグネチャ

// GLU32.dll
#include <windows.h>

void gluLookAt(
    DOUBLE eyex,
    DOUBLE eyey,
    DOUBLE eyez,
    DOUBLE centerx,
    DOUBLE centery,
    DOUBLE centerz,
    DOUBLE upx,
    DOUBLE upy,
    DOUBLE upz
);

パラメーター

名前型方向説明
eyexDOUBLEin視点位置のx座標。
eyeyDOUBLEin視点位置のy座標。
eyezDOUBLEin視点位置のz座標。
centerxDOUBLEin注視点のx座標。
centeryDOUBLEin注視点のy座標。
centerzDOUBLEin注視点のz座標。
upxDOUBLEin上方向ベクトルのx成分。
upyDOUBLEin上方向ベクトルのy成分。
upzDOUBLEin上方向ベクトルのz成分。

戻り値の型: void

各言語での呼び出し定義

// GLU32.dll
#include <windows.h>

void gluLookAt(
    DOUBLE eyex,
    DOUBLE eyey,
    DOUBLE eyez,
    DOUBLE centerx,
    DOUBLE centery,
    DOUBLE centerz,
    DOUBLE upx,
    DOUBLE upy,
    DOUBLE upz
);
[DllImport("GLU32.dll", ExactSpelling = true)]
static extern void gluLookAt(
    double eyex,   // DOUBLE
    double eyey,   // DOUBLE
    double eyez,   // DOUBLE
    double centerx,   // DOUBLE
    double centery,   // DOUBLE
    double centerz,   // DOUBLE
    double upx,   // DOUBLE
    double upy,   // DOUBLE
    double upz   // DOUBLE
);
<DllImport("GLU32.dll", ExactSpelling:=True)>
Public Shared Sub gluLookAt(
    eyex As Double,   ' DOUBLE
    eyey As Double,   ' DOUBLE
    eyez As Double,   ' DOUBLE
    centerx As Double,   ' DOUBLE
    centery As Double,   ' DOUBLE
    centerz As Double,   ' DOUBLE
    upx As Double,   ' DOUBLE
    upy As Double,   ' DOUBLE
    upz As Double   ' DOUBLE
)
End Sub
' eyex : DOUBLE
' eyey : DOUBLE
' eyez : DOUBLE
' centerx : DOUBLE
' centery : DOUBLE
' centerz : DOUBLE
' upx : DOUBLE
' upy : DOUBLE
' upz : DOUBLE
Declare PtrSafe Sub gluLookAt Lib "glu32" ( _
    ByVal eyex As Double, _
    ByVal eyey As Double, _
    ByVal eyez As Double, _
    ByVal centerx As Double, _
    ByVal centery As Double, _
    ByVal centerz As Double, _
    ByVal upx As Double, _
    ByVal upy As Double, _
    ByVal upz As Double)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。
import ctypes
from ctypes import wintypes

gluLookAt = ctypes.windll.glu32.gluLookAt
gluLookAt.restype = None
gluLookAt.argtypes = [
    ctypes.c_double,  # eyex : DOUBLE
    ctypes.c_double,  # eyey : DOUBLE
    ctypes.c_double,  # eyez : DOUBLE
    ctypes.c_double,  # centerx : DOUBLE
    ctypes.c_double,  # centery : DOUBLE
    ctypes.c_double,  # centerz : DOUBLE
    ctypes.c_double,  # upx : DOUBLE
    ctypes.c_double,  # upy : DOUBLE
    ctypes.c_double,  # upz : DOUBLE
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GLU32.dll')
gluLookAt = Fiddle::Function.new(
  lib['gluLookAt'],
  [
    Fiddle::TYPE_DOUBLE,  # eyex : DOUBLE
    Fiddle::TYPE_DOUBLE,  # eyey : DOUBLE
    Fiddle::TYPE_DOUBLE,  # eyez : DOUBLE
    Fiddle::TYPE_DOUBLE,  # centerx : DOUBLE
    Fiddle::TYPE_DOUBLE,  # centery : DOUBLE
    Fiddle::TYPE_DOUBLE,  # centerz : DOUBLE
    Fiddle::TYPE_DOUBLE,  # upx : DOUBLE
    Fiddle::TYPE_DOUBLE,  # upy : DOUBLE
    Fiddle::TYPE_DOUBLE,  # upz : DOUBLE
  ],
  Fiddle::TYPE_VOID)
#[link(name = "glu32")]
extern "system" {
    fn gluLookAt(
        eyex: f64,  // DOUBLE
        eyey: f64,  // DOUBLE
        eyez: f64,  // DOUBLE
        centerx: f64,  // DOUBLE
        centery: f64,  // DOUBLE
        centerz: f64,  // DOUBLE
        upx: f64,  // DOUBLE
        upy: f64,  // DOUBLE
        upz: f64  // DOUBLE
    );
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("GLU32.dll")]
public static extern void gluLookAt(double eyex, double eyey, double eyez, double centerx, double centery, double centerz, double upx, double upy, double upz);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GLU32_gluLookAt' -Namespace Win32 -PassThru
# $api::gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz)
#uselib "GLU32.dll"
#func global gluLookAt "gluLookAt" double, double, double, double, double, double, double, double, double
; gluLookAt eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz
; eyex : DOUBLE -> "double"
; eyey : DOUBLE -> "double"
; eyez : DOUBLE -> "double"
; centerx : DOUBLE -> "double"
; centery : DOUBLE -> "double"
; centerz : DOUBLE -> "double"
; upx : DOUBLE -> "double"
; upy : DOUBLE -> "double"
; upz : DOUBLE -> "double"
#uselib "GLU32.dll"
#func global gluLookAt "gluLookAt" double, double, double, double, double, double, double, double, double
; gluLookAt eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz
; eyex : DOUBLE -> "double"
; eyey : DOUBLE -> "double"
; eyez : DOUBLE -> "double"
; centerx : DOUBLE -> "double"
; centery : DOUBLE -> "double"
; centerz : DOUBLE -> "double"
; upx : DOUBLE -> "double"
; upy : DOUBLE -> "double"
; upz : DOUBLE -> "double"
; void gluLookAt(DOUBLE eyex, DOUBLE eyey, DOUBLE eyez, DOUBLE centerx, DOUBLE centery, DOUBLE centerz, DOUBLE upx, DOUBLE upy, DOUBLE upz)
#uselib "GLU32.dll"
#func global gluLookAt "gluLookAt" double, double, double, double, double, double, double, double, double
; gluLookAt eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz
; eyex : DOUBLE -> "double"
; eyey : DOUBLE -> "double"
; eyez : DOUBLE -> "double"
; centerx : DOUBLE -> "double"
; centery : DOUBLE -> "double"
; centerz : DOUBLE -> "double"
; upx : DOUBLE -> "double"
; upy : DOUBLE -> "double"
; upz : DOUBLE -> "double"
import (
	"math"
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	glu32 = windows.NewLazySystemDLL("GLU32.dll")
	procgluLookAt = glu32.NewProc("gluLookAt")
)

// eyex (DOUBLE), eyey (DOUBLE), eyez (DOUBLE), centerx (DOUBLE), centery (DOUBLE), centerz (DOUBLE), upx (DOUBLE), upy (DOUBLE), upz (DOUBLE)
r1, _, err := procgluLookAt.Call(
	uintptr(math.Float64bits(eyex)),
	uintptr(math.Float64bits(eyey)),
	uintptr(math.Float64bits(eyez)),
	uintptr(math.Float64bits(centerx)),
	uintptr(math.Float64bits(centery)),
	uintptr(math.Float64bits(centerz)),
	uintptr(math.Float64bits(upx)),
	uintptr(math.Float64bits(upy)),
	uintptr(math.Float64bits(upz)),
)
_ = 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 gluLookAt(
  eyex: Double;   // DOUBLE
  eyey: Double;   // DOUBLE
  eyez: Double;   // DOUBLE
  centerx: Double;   // DOUBLE
  centery: Double;   // DOUBLE
  centerz: Double;   // DOUBLE
  upx: Double;   // DOUBLE
  upy: Double;   // DOUBLE
  upz: Double   // DOUBLE
); stdcall;
  external 'GLU32.dll' name 'gluLookAt';
result := DllCall("GLU32\gluLookAt"
    , "Double", eyex   ; DOUBLE
    , "Double", eyey   ; DOUBLE
    , "Double", eyez   ; DOUBLE
    , "Double", centerx   ; DOUBLE
    , "Double", centery   ; DOUBLE
    , "Double", centerz   ; DOUBLE
    , "Double", upx   ; DOUBLE
    , "Double", upy   ; DOUBLE
    , "Double", upz   ; DOUBLE
    , "Int")   ; return: void
●gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz) = DLL("GLU32.dll", "int gluLookAt(double, double, double, double, double, double, double, double, double)")
# 呼び出し: gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz)
# eyex : DOUBLE -> "double"
# eyey : DOUBLE -> "double"
# eyez : DOUBLE -> "double"
# centerx : DOUBLE -> "double"
# centery : DOUBLE -> "double"
# centerz : DOUBLE -> "double"
# upx : DOUBLE -> "double"
# upy : DOUBLE -> "double"
# upz : 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)。
const std = @import("std");

extern "glu32" fn gluLookAt(
    eyex: f64, // DOUBLE
    eyey: f64, // DOUBLE
    eyez: f64, // DOUBLE
    centerx: f64, // DOUBLE
    centery: f64, // DOUBLE
    centerz: f64, // DOUBLE
    upx: f64, // DOUBLE
    upy: f64, // DOUBLE
    upz: f64 // DOUBLE
) callconv(std.os.windows.WINAPI) void;
proc gluLookAt(
    eyex: float64,  # DOUBLE
    eyey: float64,  # DOUBLE
    eyez: float64,  # DOUBLE
    centerx: float64,  # DOUBLE
    centery: float64,  # DOUBLE
    centerz: float64,  # DOUBLE
    upx: float64,  # DOUBLE
    upy: float64,  # DOUBLE
    upz: float64  # DOUBLE
) {.importc: "gluLookAt", stdcall, dynlib: "GLU32.dll".}
pragma(lib, "glu32");
extern(Windows)
void gluLookAt(
    double eyex,   // DOUBLE
    double eyey,   // DOUBLE
    double eyez,   // DOUBLE
    double centerx,   // DOUBLE
    double centery,   // DOUBLE
    double centerz,   // DOUBLE
    double upx,   // DOUBLE
    double upy,   // DOUBLE
    double upz   // DOUBLE
);
ccall((:gluLookAt, "GLU32.dll"), stdcall, Cvoid,
      (Float64, Float64, Float64, Float64, Float64, Float64, Float64, Float64, Float64),
      eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz)
# eyex : DOUBLE -> Float64
# eyey : DOUBLE -> Float64
# eyez : DOUBLE -> Float64
# centerx : DOUBLE -> Float64
# centery : DOUBLE -> Float64
# centerz : DOUBLE -> Float64
# upx : DOUBLE -> Float64
# upy : DOUBLE -> Float64
# upz : DOUBLE -> Float64
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
void gluLookAt(
    double eyex,
    double eyey,
    double eyez,
    double centerx,
    double centery,
    double centerz,
    double upx,
    double upy,
    double upz);
]]
local glu32 = ffi.load("glu32")
-- glu32.gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz)
-- eyex : DOUBLE
-- eyey : DOUBLE
-- eyez : DOUBLE
-- centerx : DOUBLE
-- centery : DOUBLE
-- centerz : DOUBLE
-- upx : DOUBLE
-- upy : DOUBLE
-- upz : DOUBLE
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
const koffi = require('koffi');
const lib = koffi.load('GLU32.dll');
const gluLookAt = lib.func('__stdcall', 'gluLookAt', 'void', ['double', 'double', 'double', 'double', 'double', 'double', 'double', 'double', 'double']);
// gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz)
// eyex : DOUBLE -> 'double'
// eyey : DOUBLE -> 'double'
// eyez : DOUBLE -> 'double'
// centerx : DOUBLE -> 'double'
// centery : DOUBLE -> 'double'
// centerz : DOUBLE -> 'double'
// upx : DOUBLE -> 'double'
// upy : DOUBLE -> 'double'
// upz : DOUBLE -> 'double'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。
const lib = Deno.dlopen("GLU32.dll", {
  gluLookAt: { parameters: ["f64", "f64", "f64", "f64", "f64", "f64", "f64", "f64", "f64"], result: "void" },
});
// lib.symbols.gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz)
// eyex : DOUBLE -> "f64"
// eyey : DOUBLE -> "f64"
// eyez : DOUBLE -> "f64"
// centerx : DOUBLE -> "f64"
// centery : DOUBLE -> "f64"
// centerz : DOUBLE -> "f64"
// upx : DOUBLE -> "f64"
// upy : DOUBLE -> "f64"
// upz : DOUBLE -> "f64"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。
<?php
$ffi = FFI::cdef(<<<C
void gluLookAt(
    double eyex,
    double eyey,
    double eyez,
    double centerx,
    double centery,
    double centerz,
    double upx,
    double upy,
    double upz);
C, "GLU32.dll");
// $ffi->gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz);
// eyex : DOUBLE
// eyey : DOUBLE
// eyez : DOUBLE
// centerx : DOUBLE
// centery : DOUBLE
// centerz : DOUBLE
// upx : DOUBLE
// upy : DOUBLE
// upz : DOUBLE
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。
import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Glu32 extends StdCallLibrary {
    Glu32 INSTANCE = Native.load("glu32", Glu32.class);
    void gluLookAt(
        double eyex,   // DOUBLE
        double eyey,   // DOUBLE
        double eyez,   // DOUBLE
        double centerx,   // DOUBLE
        double centery,   // DOUBLE
        double centerz,   // DOUBLE
        double upx,   // DOUBLE
        double upy,   // DOUBLE
        double upz   // DOUBLE
    );
}
@[Link("glu32")]
lib LibGLU32
  fun gluLookAt = gluLookAt(
    eyex : Float64,   # DOUBLE
    eyey : Float64,   # DOUBLE
    eyez : Float64,   # DOUBLE
    centerx : Float64,   # DOUBLE
    centery : Float64,   # DOUBLE
    centerz : Float64,   # DOUBLE
    upx : Float64,   # DOUBLE
    upy : Float64,   # DOUBLE
    upz : Float64   # DOUBLE
  ) : Void
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。
import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef gluLookAtNative = Void Function(Double, Double, Double, Double, Double, Double, Double, Double, Double);
typedef gluLookAtDart = void Function(double, double, double, double, double, double, double, double, double);
final gluLookAt = DynamicLibrary.open('GLU32.dll')
    .lookupFunction<gluLookAtNative, gluLookAtDart>('gluLookAt');
// eyex : DOUBLE -> Double
// eyey : DOUBLE -> Double
// eyez : DOUBLE -> Double
// centerx : DOUBLE -> Double
// centery : DOUBLE -> Double
// centerz : DOUBLE -> Double
// upx : DOUBLE -> Double
// upy : DOUBLE -> Double
// upz : DOUBLE -> Double
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
procedure gluLookAt(
  eyex: Double;   // DOUBLE
  eyey: Double;   // DOUBLE
  eyez: Double;   // DOUBLE
  centerx: Double;   // DOUBLE
  centery: Double;   // DOUBLE
  centerz: Double;   // DOUBLE
  upx: Double;   // DOUBLE
  upy: Double;   // DOUBLE
  upz: Double   // DOUBLE
); stdcall;
  external 'GLU32.dll' name 'gluLookAt';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "gluLookAt"
  c_gluLookAt :: CDouble -> CDouble -> CDouble -> CDouble -> CDouble -> CDouble -> CDouble -> CDouble -> CDouble -> IO ()
-- eyex : DOUBLE -> CDouble
-- eyey : DOUBLE -> CDouble
-- eyez : DOUBLE -> CDouble
-- centerx : DOUBLE -> CDouble
-- centery : DOUBLE -> CDouble
-- centerz : DOUBLE -> CDouble
-- upx : DOUBLE -> CDouble
-- upy : DOUBLE -> CDouble
-- upz : DOUBLE -> CDouble
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。
open Ctypes
open Foreign

let glulookat =
  foreign "gluLookAt"
    (double @-> double @-> double @-> double @-> double @-> double @-> double @-> double @-> double @-> returning void)
(* eyex : DOUBLE -> double *)
(* eyey : DOUBLE -> double *)
(* eyez : DOUBLE -> double *)
(* centerx : DOUBLE -> double *)
(* centery : DOUBLE -> double *)
(* centerz : DOUBLE -> double *)
(* upx : DOUBLE -> double *)
(* upy : DOUBLE -> double *)
(* upz : DOUBLE -> double *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)
(cffi:define-foreign-library glu32 (t "GLU32.dll"))
(cffi:use-foreign-library glu32)

(cffi:defcfun ("gluLookAt" glu-look-at :convention :stdcall) :void
  (eyex :double)   ; DOUBLE
  (eyey :double)   ; DOUBLE
  (eyez :double)   ; DOUBLE
  (centerx :double)   ; DOUBLE
  (centery :double)   ; DOUBLE
  (centerz :double)   ; DOUBLE
  (upx :double)   ; DOUBLE
  (upy :double)   ; DOUBLE
  (upz :double))   ; DOUBLE
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $gluLookAt = Win32::API::More->new('GLU32',
    'void gluLookAt(double eyex, double eyey, double eyez, double centerx, double centery, double centerz, double upx, double upy, double upz)');
# my $ret = $gluLookAt->Call($eyex, $eyey, $eyez, $centerx, $centery, $centerz, $upx, $upy, $upz);
# eyex : DOUBLE -> double
# eyey : DOUBLE -> double
# eyez : DOUBLE -> double
# centerx : DOUBLE -> double
# centery : DOUBLE -> double
# centerz : DOUBLE -> double
# upx : DOUBLE -> double
# upy : DOUBLE -> double
# upz : DOUBLE -> double
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。