三维物体转动opengl程序.docx
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三维物体转动opengl程序
/*
*ThisCodeWasCreatedByJeffMolofee2000
*AHUGEThanksToFredricEcholsForCleaningUp
*AndOptimizingTheBaseCode,MakingItMoreFlexible!
*IfYou'veFoundThisCodeUseful,PleaseLetMeKnow.
*VisitMySiteAt
*/
#include//HeaderFileForWindows
#include//HeaderFileForTheOpenGL32Library
#include//HeaderFileForTheGLu32Library
#include//HeaderFileForTheGlauxLibrary
HDChDC=NULL;//PrivateGDIDeviceContext
HGLRChRC=NULL;//PermanentRenderingContext
HWNDhWnd=NULL;//HoldsOurWindowHandle
HINSTANCEhInstance;//HoldsTheInstanceOfTheApplication
boolkeys[256];//ArrayUsedForTheKeyboardRoutine
boolactive=TRUE;//WindowActiveFlagSetToTRUEByDefault
boolfullscreen=TRUE;//FullscreenFlagSetToFullscreenModeByDefault
GLfloatrtri;//AngleForTheTriangle（NEW）
GLfloatrquad;//AngleForTheQuad（NEW）
LRESULTCALLBACKWndProc（HWND,UINT,WPARAM,LPARAM）;//DeclarationForWndProc
GLvoidReSizeGLScene（GLsizeiwidth,GLsizeiheight）//ResizeAndInitializeTheGLWindow
{
if（height==0）//PreventADivideByZeroBy
{
height=1;//MakingHeightEqualOne
}
glViewport（0,0,width,height）;//ResetTheCurrentViewport
glMatrixMode（GL_PROJECTION）;//SelectTheProjectionMatrix
glLoadIdentity（）;//ResetTheProjectionMatrix
//CalculateTheAspectRatioOfTheWindow
gluPerspective（45.0f,（GLfloat）width/（GLfloat）height,0.1f,100.0f）;
glMatrixMode（GL_MODELVIEW）;//SelectTheModelviewMatrix
glLoadIdentity（）;//ResetTheModelviewMatrix
}
intInitGL（GLvoid）//AllSetupForOpenGLGoesHere
{
glShadeModel（GL_SMOOTH）;//EnableSmoothShading
glClearColor（0.0f,0.0f,0.0f,0.5f）;//BlackBackground
glClearDepth（1.0f）;//DepthBufferSetup
glEnable（GL_DEPTH_TEST）;//EnablesDepthTesting
glDepthFunc（GL_LEQUAL）;//TheTypeOfDepthTestingToDo
glHint（GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST）;//ReallyNicePerspectiveCalculations
returnTRUE;//InitializationWentOK
}
intDrawGLScene（GLvoid）//Here'sWhereWeDoAllTheDrawing
{
glClear（GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT）;//ClearScreenAndDepthBuffer
glLoadIdentity（）;//ResetTheCurrentModelviewMatrix
glTranslatef（-1.5f,0.0f,-6.0f）;//MoveLeft1.5UnitsAndIntoTheScreen6.0
glRotatef（rtri,0.0f,1.0f,0.0f）;//RotateTheTriangleOnTheYaxis（NEW）
glBegin（GL_TRIANGLES）;//StartDrawingATriangle
glColor3f（1.0f,0.0f,0.0f）;//Red
glVertex3f（0.0f,1.0f,0.0f）;//TopOfTriangle（Front）
glColor3f（0.0f,1.0f,0.0f）;//Green
glVertex3f（-1.0f,-1.0f,1.0f）;//LeftOfTriangle（Front）
glColor3f（0.0f,0.0f,1.0f）;//Blue
glVertex3f（1.0f,-1.0f,1.0f）;//RightOfTriangle（Front）
glColor3f（1.0f,0.0f,0.0f）;//Red
glVertex3f（0.0f,1.0f,0.0f）;//TopOfTriangle（Right）
glColor3f（0.0f,0.0f,1.0f）;//Blue
glVertex3f（1.0f,-1.0f,1.0f）;//LeftOfTriangle（Right）
glColor3f（0.0f,1.0f,0.0f）;//Green
glVertex3f（1.0f,-1.0f,-1.0f）;//RightOfTriangle（Right）
glColor3f（1.0f,0.0f,0.0f）;//Red
glVertex3f（0.0f,1.0f,0.0f）;//TopOfTriangle（Back）
glColor3f（0.0f,1.0f,0.0f）;//Green
glVertex3f（1.0f,-1.0f,-1.0f）;//LeftOfTriangle（Back）
glColor3f（0.0f,0.0f,1.0f）;//Blue
glVertex3f（-1.0f,-1.0f,-1.0f）;//RightOfTriangle（Back）
glColor3f（1.0f,0.0f,0.0f）;//Red
glVertex3f（0.0f,1.0f,0.0f）;//TopOfTriangle（Left）
glColor3f（0.0f,0.0f,1.0f）;//Blue
glVertex3f（-1.0f,-1.0f,-1.0f）;//LeftOfTriangle（Left）
glColor3f（0.0f,1.0f,0.0f）;//Green
glVertex3f（-1.0f,-1.0f,1.0f）;//RightOfTriangle（Left）
glEnd（）;//DoneDrawingThePyramid
glLoadIdentity（）;//ResetTheCurrentModelviewMatrix
glTranslatef（1.5f,0.0f,-7.0f）;//MoveRight1.5UnitsAndIntoTheScreen7.0
glRotatef（rquad,1.0f,1.0f,1.0f）;//RotateTheQuadOnTheXaxis（NEW）
glBegin（GL_QUADS）;//DrawAQuad
glColor3f（0.0f,1.0f,0.0f）;//SetTheColorToGreen
glVertex3f（1.0f,1.0f,-1.0f）;//TopRightOfTheQuad（Top）
glVertex3f（-1.0f,1.0f,-1.0f）;//TopLeftOfTheQuad（Top）
glVertex3f（-1.0f,1.0f,1.0f）;//BottomLeftOfTheQuad（Top）
glVertex3f（1.0f,1.0f,1.0f）;//BottomRightOfTheQuad（Top）
glColor3f（1.0f,0.5f,0.0f）;//SetTheColorToOrange
glVertex3f（1.0f,-1.0f,1.0f）;//TopRightOfTheQuad（Bottom）
glVertex3f（-1.0f,-1.0f,1.0f）;//TopLeftOfTheQuad（Bottom）
glVertex3f（-1.0f,-1.0f,-1.0f）;//BottomLeftOfTheQuad（Bottom）
glVertex3f（1.0f,-1.0f,-1.0f）;//BottomRightOfTheQuad（Bottom）
glColor3f（1.0f,0.0f,0.0f）;//SetTheColorToRed
glVertex3f（1.0f,1.0f,1.0f）;//TopRightOfTheQuad（Front）
glVertex3f（-1.0f,1.0f,1.0f）;//TopLeftOfTheQuad（Front）
glVertex3f（-1.0f,-1.0f,1.0f）;//BottomLeftOfTheQuad（Front）
glVertex3f（1.0f,-1.0f,1.0f）;//BottomRightOfTheQuad（Front）
glColor3f（1.0f,1.0f,0.0f）;//SetTheColorToYellow
glVertex3f（1.0f,-1.0f,-1.0f）;//TopRightOfTheQuad（Back）
glVertex3f（-1.0f,-1.0f,-1.0f）;//TopLeftOfTheQuad（Back）
glVertex3f（-1.0f,1.0f,-1.0f）;//BottomLeftOfTheQuad（Back）
glVertex3f（1.0f,1.0f,-1.0f）;//BottomRightOfTheQuad（Back）
glColor3f（0.0f,0.0f,1.0f）;//SetTheColorToBlue
glVertex3f（-1.0f,1.0f,1.0f）;//TopRightOfTheQuad（Left）
glVertex3f（-1.0f,1.0f,-1.0f）;//TopLeftOfTheQuad（Left）
glVertex3f（-1.0f,-1.0f,-1.0f）;//BottomLeftOfTheQuad（Left）
glVertex3f（-1.0f,-1.0f,1.0f）;//BottomRightOfTheQuad（Left）
glColor3f（1.0f,0.0f,1.0f）;//SetTheColorToViolet
glVertex3f（1.0f,1.0f,-1.0f）;//TopRightOfTheQuad（Right）
glVertex3f（1.0f,1.0f,1.0f）;//TopLeftOfTheQuad（Right）
glVertex3f（1.0f,-1.0f,1.0f）;//BottomLeftOfTheQuad（Right）
glVertex3f（1.0f,-1.0f,-1.0f）;//BottomRightOfTheQuad（Right）
glEnd（）;//DoneDrawingTheQuad
rtri+=0.2f;//IncreaseTheRotationVariableForTheTriangle（NEW）
rquad-=0.15f;//DecreaseTheRotationVariableForTheQuad（NEW）
returnTRUE;//KeepGoing
}
GLvoidKillGLWindow（GLvoid）//ProperlyKillTheWindow
{
if（fullscreen）//AreWeInFullscreenMode?
{
ChangeDisplaySettings（NULL,0）;//IfSoSwitchBackToTheDesktop
ShowCursor（TRUE）;//ShowMousePointer
}
if（hRC）//DoWeHaveARenderingContext?
{
if（!
wglMakeCurrent（NULL,NULL））//AreWeAbleToReleaseTheDCAndRCContexts?
{
MessageBox（NULL,"ReleaseOfDCAndRCFailed.","SHUTDOWNERROR",MB_OK|MB_ICONINFORMATION）;
}
if（!
wglDeleteContext（hRC））//AreWeAbleToDeleteTheRC?
{
MessageBox（NULL,"ReleaseRenderingContextFailed.","SHUTDOWNERROR",MB_OK|MB_ICONINFORMATION）;
}
hRC=NULL;//SetRCToNULL
}
if（hDC&&!
ReleaseDC（hWnd,hDC））//AreWeAbleToReleaseTheDC
{
MessageBox（NULL,"ReleaseDeviceContextFailed.","SHUTDOWNERROR",MB_OK|MB_ICONINFORMATION）;
hDC=NULL;//SetDCToNULL
}
if（hWnd&&!
DestroyWindow（hWnd））//AreWeAbleToDestroyTheWindow?
{
MessageBox（NULL,"CouldNotReleasehWnd.","SHUTDOWNERROR",MB_OK|MB_ICONINFORMATION）;
hWnd=NULL;//SethWndToNULL
}
if（!
UnregisterClass（"OpenGL",hInstance））//AreWeAbleToUnregisterClass
{
MessageBox（NULL,"CouldNotUnregisterClass.","SHUTDOWNERROR",MB_OK|MB_ICONINFORMATION）;
hInstance=NULL;//SethInstanceToNULL
}
}
/*ThisCodeCreatesOurOpenGLWindow.ParametersAre:
*
*title-TitleToAppearAtTheTopOfTheWindow*
*width-WidthOfTheGLWindowOrFullscreenMode*
*height-HeightOfTheGLWindowOrFullscreenMode*
*bits-NumberOfBitsToUseForColor（8/16/24/32）*
*fullscreenflag-UseFullscreenMode（TRUE）OrWindowedMode（FALSE）*/
BOOLCreateGLWindow（char*title,intwidth,intheight,intbits,boolfullscreenflag）
{
GLuintPixelFormat;//HoldsTheResultsAfterSearchingForAMatch
WNDCLASSwc;//WindowsClassStructure
DWORDdwExStyle;//WindowExtendedStyle
DWORDdwStyle;//WindowStyle
RECTWindowRect;//GrabsRectangleUpperLeft/LowerRightValues
WindowRect.left=（long）0;//SetLeftValueTo0
WindowRect.right=（long）width;//SetRightValueToRequestedWidth
WindowRect.top=（long）0;//SetTopValueTo0
WindowRect.bottom=（long）height;//SetBottomValueToRequestedHeight
fullscreen=fullscreenflag;//SetTheGlobalFullscreenFlag
hInstance=GetModuleHandle（NULL）;//GrabAnInstanceForOurWindow
wc.style=CS_HREDRAW|CS_VREDRAW|CS_OWNDC;//RedrawOnSize,AndOwnDCForWindow.
wc.lpfnWndProc=（WNDPROC）WndProc;//WndProcHandlesMessages
wc.cbClsExtra=0;//NoExtraWindowData
wc.cbWndExtra=0;//NoExtraWindowData
wc.hInstance=hInstance;//SetTheInstance
wc.hIcon=LoadIcon（NULL,IDI_WINLOGO）;//LoadTheDefaultIcon
wc.hCursor=LoadCursor（NULL,IDC_ARROW）;//LoadTheArrowPointer
wc.hbrBackground=NULL;//NoBackgroundRequiredForGL
wc.lpszMenuName=NULL;//WeDon'tWantAMenu
wc.lpszClassName="OpenGL";//SetTheClassName
if（!
RegisterClass（&wc））//AttemptToRegisterTheWindowClass
{
MessageBox（NUL
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