}
#endif //_DEBUG
// Create OpenGL rendering context
int CRenderView::OnCreate(LPCREATESTRUCT lpCreateStruct) {
if (CView::OnCreate(lpCreateStruct) == -1) return -1;
HWND hWnd = GetSafeHwnd(); HDC hDC = ::GetDC(hWnd);
if(SetWindowPixelFormat(hDC)==FALSE) return 0;
if(CreateViewGLContext(hDC)==FALSE) return 0;
// Default mode
glPolygonMode(GL_FRONT,GL_FILL); glPolygonMode(GL_BACK,GL_FILL); glShadeModel(GL_FLAT);
// light must be disabled // while rendering the terrain
// because it has no normal definition InitGeometry();
glEnable(GL_TEXTURE_2D); glDisable(GL_LIGHTING); return 0; }
BOOL CRenderView::SetWindowPixelFormat(HDC hDC) {
PIXELFORMATDESCRIPTOR pixelDesc;
pixelDesc.nSize = sizeof(PIXELFORMATDESCRIPTOR); pixelDesc.nVersion = 1;
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pixelDesc.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_STEREO_DONTCARE;
pixelDesc.iPixelType = PFD_TYPE_RGBA; pixelDesc.cColorBits = 32; pixelDesc.cRedBits = 8; pixelDesc.cRedShift = 16; pixelDesc.cGreenBits = 8; pixelDesc.cGreenShift = 8; pixelDesc.cBlueBits = 8; pixelDesc.cBlueShift = 0; pixelDesc.cAlphaBits = 0; pixelDesc.cAlphaShift = 0; pixelDesc.cAccumBits = 64; pixelDesc.cAccumRedBits = 16; pixelDesc.cAccumGreenBits = 16; pixelDesc.cAccumBlueBits = 16; pixelDesc.cAccumAlphaBits = 0; pixelDesc.cDepthBits = 32; pixelDesc.cStencilBits = 8; pixelDesc.cAuxBuffers = 0;
pixelDesc.iLayerType = PFD_MAIN_PLANE; pixelDesc.bReserved = 0; pixelDesc.dwLayerMask = 0; pixelDesc.dwVisibleMask = 0; pixelDesc.dwDamageMask = 0;
m_GLPixelIndex = ChoosePixelFormat(hDC,&pixelDesc); if(m_GLPixelIndex == 0) // Choose default {
m_GLPixelIndex = 1;
if(DescribePixelFormat(hDC,m_GLPixelIndex,
sizeof(PIXELFORMATDESCRIPTOR),&pixelDesc)==0) return FALSE; }
if(!SetPixelFormat(hDC,m_GLPixelIndex,&pixelDesc)) return FALSE;
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return TRUE; }
// Create an OpenGL rendering context
BOOL CRenderView::CreateViewGLContext(HDC hDC) {
m_hGLContext = wglCreateContext(hDC);
if(m_hGLContext==NULL) return FALSE;
if(wglMakeCurrent(hDC,m_hGLContext)==FALSE) return FALSE;
return TRUE; }
// Cleanup every OpenGL rendering context void CRenderView::OnDestroy() {
if(wglGetCurrentContext() != NULL) wglMakeCurrent(NULL,NULL);
if(m_hGLContext != NULL) {
wglDeleteContext(m_hGLContext); m_hGLContext = NULL; }
CView::OnDestroy(); }
void CRenderView::OnSize(UINT nType, int cx, int cy) {
CView::OnSize(nType, cx, cy);
// Set OpenGL perspective, viewport and mode CSize size(cx,cy); double aspect;
aspect = (cy == 0) ? (double)size.cx : (double)size.cx/(double)size.cy;
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glViewport(0, 0, (GLsizei) cx, (GLsizei) cy); glMatrixMode(GL_PROJECTION); glLoadIdentity();
gluPerspective(60.0, (GLfloat) cx/(GLfloat) cy, 1.0f, 500.0f);
glMatrixMode(GL_MODELVIEW); glLoadIdentity();
gluLookAt (ex, ey, ez, cx, cy, cz, 0.0f, 1.0f, 0.0f); }
void CRenderView::OnLButtonDown(UINT nFlags, CPoint point) {
m_LeftButtonDown = TRUE; m_LeftDownPos = point;
CView::OnLButtonDown(nFlags, point); }
void CRenderView::OnLButtonUp(UINT nFlags, CPoint point) {
m_LeftButtonDown = FALSE;
CView::OnLButtonUp(nFlags, point); }
void CRenderView::OnMouseMove(UINT nFlags, CPoint point) {
switch(nFlags){
case(MK_LBUTTON): MoveEye(FORWARD,(GLfloat)(oldmy-point.y)/5.0f,1); break;
case(MK_RBUTTON):
MoveEye(TURNLEFT, (GLfloat)(oldmx-point.x), 1); break; }
oldmy = point.y; oldmx = point.x; Invalidate(FALSE);
CView::OnMouseMove(nFlags, point);
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}
void CRenderView::OnPaint() {
// Device context for painting CPaintDC dc(this);
// Useful in singledoc templates HWND hWnd = GetSafeHwnd(); HDC hDC = ::GetDC(hWnd);
wglMakeCurrent(hDC,m_hGLContext);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClearColor(m_ClearColorRed,m_ClearColorGreen,m_ClearColorBlue,1.0f); glPushMatrix();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); InitRenderWin(); Render();
// Double buffers SwapBuffers(hDC); }
// Function that moves the eye or turns the angle of sight. // Updates scene if update != 0.
void CRenderView::MoveEye(int type, GLfloat amount, int update) {
GLfloat a;
switch(type){ case FORWARD: a = sqrt((cx-ex)*(cx-ex)+(cz-ez)*(cz-ez)); ex = (amount*(cx-ex)+a*ex) / a; ez = (amount*(cz-ez)+a*ez) / a; cx = (amount*(cx-ex)+a*cx) / a; cz = (amount*(cz-ez)+a*cz) / a; break;
case TURNLEFT:
cx = (cx-ex)*(float)cos(amount/360.0f) + (cz-ez)*(float)sin(amount/360.0f)+ex; cz = (cz-ez)*(float)cos(amount/360.0f) - (cx-ex)*(float)sin(amount/360.0f)+ez;
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