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

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
eyex	DOUBLE	in
eyey	DOUBLE	in
eyez	DOUBLE	in
centerx	DOUBLE	in
centery	DOUBLE	in
centerz	DOUBLE	in
upx	DOUBLE	in
upy	DOUBLE	in
upz	DOUBLE	in

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)。