📄 mydischargeview.cpp
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// MyDischargeView.cpp : implementation of the CMyDischargeView class
//
#include "stdafx.h"
#include "MyDischarge.h"
#include "MyDischargeDoc.h"
#include "MyDischargeView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CMyDischargeView
IMPLEMENT_DYNCREATE(CMyDischargeView, CView)
BEGIN_MESSAGE_MAP(CMyDischargeView, CView)
//{{AFX_MSG_MAP(CMyDischargeView)
ON_WM_CREATE()
ON_WM_DESTROY()
ON_WM_SIZE()
ON_WM_TIMER()
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMyDischargeView construction/destruction
CMyDischargeView::CMyDischargeView()
{
// TODO: add construction code here
}
CMyDischargeView::~CMyDischargeView()
{
}
BOOL CMyDischargeView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
////////////////////////////////////////////////////////////////
//设置窗口类型
cs.style |=WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
////////////////////////////////////////////////////////////////
return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CMyDischargeView drawing
void CMyDischargeView::OnDraw(CDC* pDC)
{
CMyDischargeDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
//////////////////////////////////////////////////////////////////
RenderScene(); //渲染场景
//////////////////////////////////////////////////////////////////
}
/////////////////////////////////////////////////////////////////////////////
// CMyDischargeView printing
BOOL CMyDischargeView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}
void CMyDischargeView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}
void CMyDischargeView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CMyDischargeView diagnostics
#ifdef _DEBUG
void CMyDischargeView::AssertValid() const
{
CView::AssertValid();
}
void CMyDischargeView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
CMyDischargeDoc* CMyDischargeView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMyDischargeDoc)));
return (CMyDischargeDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CMyDischargeView message handlers
int CMyDischargeView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CView::OnCreate(lpCreateStruct) == -1)
return -1;
// TODO: Add your specialized creation code here
//////////////////////////////////////////////////////////////////
//初始化OpenGL和设置定时器
m_pDC = new CClientDC(this);
SetTimer(1, 20, NULL);
InitializeOpenGL(m_pDC);
//////////////////////////////////////////////////////////////////
LoadTexture();
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
return 0;
}
void CMyDischargeView::OnDestroy()
{
CView::OnDestroy();
// TODO: Add your message handler code here
/////////////////////////////////////////////////////////////////
//删除调色板和渲染上下文、定时器
::wglMakeCurrent(0,0);
::wglDeleteContext( m_hRC);
if (m_hPalette)
DeleteObject(m_hPalette);
if ( m_pDC )
{
delete m_pDC;
}
KillTimer(1);
/////////////////////////////////////////////////////////////////
}
void CMyDischargeView::OnSize(UINT nType, int cx, int cy)
{
CView::OnSize(nType, cx, cy);
// TODO: Add your message handler code here
/////////////////////////////////////////////////////////////////
//添加窗口缩放时的图形变换函数
glViewport(0,0,cx,cy);
/////////////////////////////////////////////////////////////////
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-13, 33, -20, 20);
glMatrixMode(GL_MODELVIEW);
}
void CMyDischargeView::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
/////////////////////////////////////////////////////////////////
//添加定时器响应函数和场景更新函数
Invalidate(FALSE);
/////////////////////////////////////////////////////////////////
CView::OnTimer(nIDEvent);
}
/////////////////////////////////////////////////////////////////////
// 设置逻辑调色板
//////////////////////////////////////////////////////////////////////
void CMyDischargeView::SetLogicalPalette(void)
{
struct
{
WORD Version;
WORD NumberOfEntries;
PALETTEENTRY aEntries[256];
} logicalPalette = { 0x300, 256 };
BYTE reds[] = {0, 36, 72, 109, 145, 182, 218, 255};
BYTE greens[] = {0, 36, 72, 109, 145, 182, 218, 255};
BYTE blues[] = {0, 85, 170, 255};
for (int colorNum=0; colorNum<256; ++colorNum)
{
logicalPalette.aEntries[colorNum].peRed =
reds[colorNum & 0x07];
logicalPalette.aEntries[colorNum].peGreen =
greens[(colorNum >> 0x03) & 0x07];
logicalPalette.aEntries[colorNum].peBlue =
blues[(colorNum >> 0x06) & 0x03];
logicalPalette.aEntries[colorNum].peFlags = 0;
}
m_hPalette = CreatePalette ((LOGPALETTE*)&logicalPalette);
}
//////////////////////////////////////////////////////////
// 初始化openGL场景
//////////////////////////////////////////////////////////
BOOL CMyDischargeView::InitializeOpenGL(CDC* pDC)
{
m_pDC = pDC;
SetupPixelFormat();
//生成绘制描述表
m_hRC = ::wglCreateContext(m_pDC->GetSafeHdc());
//置当前绘制描述表
::wglMakeCurrent(m_pDC->GetSafeHdc(), m_hRC);
return TRUE;
}
//////////////////////////////////////////////////////////
// 设置像素格式
//////////////////////////////////////////////////////////
BOOL CMyDischargeView::SetupPixelFormat()
{
PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR), // pfd结构的大小
1, // 版本号
PFD_DRAW_TO_WINDOW | // 支持在窗口中绘图
PFD_SUPPORT_OPENGL | // 支持 OpenGL
PFD_DOUBLEBUFFER, // 双缓存模式
PFD_TYPE_RGBA, // RGBA 颜色模式
24, // 24 位颜色深度
0, 0, 0, 0, 0, 0, // 忽略颜色位
0, // 没有非透明度缓存
0, // 忽略移位位
0, // 无累加缓存
0, 0, 0, 0, // 忽略累加位
32, // 32 位深度缓存
0, // 无模板缓存
0, // 无辅助缓存
PFD_MAIN_PLANE, // 主层
0, // 保留
0, 0, 0 // 忽略层,可见性和损毁掩模
};
int pixelformat;
pixelformat = ::ChoosePixelFormat(m_pDC->GetSafeHdc(), &pfd);//选择像素格式
::SetPixelFormat(m_pDC->GetSafeHdc(), pixelformat, &pfd); //设置像素格式
if(pfd.dwFlags & PFD_NEED_PALETTE)
SetLogicalPalette(); //设置逻辑调色板
return TRUE;
}
//////////////////////////////////////////////////////////
// 场景绘制与渲染
//////////////////////////////////////////////////////////
BOOL CMyDischargeView::RenderScene()
{
glClear(GL_COLOR_BUFFER_BIT);
ModifyKnots();
glDisable(GL_TEXTURE_2D);
glColor3f(1, 1, 1);
glBegin(GL_LINES);
glVertex2f(10.5, -40);
glVertex2f(0.5, 0);
glVertex2f(10.5, -40);
glVertex2f(20.5, 0);
glEnd();
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
for (i=0; i<KNOTS-1; i++)
Line((float)(i+1), ds[i]/2, (float)(i+2), ds[i+1]/2, 0.05);
glEnd();
glColor4f(0, 1, 1, 1);
glPushMatrix();
glTranslatef(0.5, 0, 0);
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex2f(-2, -2);
glTexCoord2f(1, 0); glVertex2f(2, -2);
glTexCoord2f(1, 1); glVertex2f(2, 2);
glTexCoord2f(0, 1); glVertex2f(-2, 2);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslatef(20.5, 0, 0);
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex2f(-2, -2);
glTexCoord2f(1, 0); glVertex2f(2, -2);
glTexCoord2f(1, 1); glVertex2f(2, 2);
glTexCoord2f(0, 1); glVertex2f(-2, 2);
glEnd();
glPopMatrix();
glFlush();
::SwapBuffers(m_pDC->GetSafeHdc()); //交互缓冲区
return TRUE;
}
void CMyDischargeView::LoadTexture( )
{
int texwid, texht;
int texcomps;
char fn[]="particle.rgb";
teximage = m_Tex->read_texture(fn, &texwid, &texht, &texcomps);
if (!teximage)
{
MessageBox("Sorry, can't read texture file...","Error",MB_OK);
exit(0);
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, texwid, texht, 0, GL_RGBA, GL_UNSIGNED_BYTE, teximage);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glEnable(GL_TEXTURE_2D);
}
void CMyDischargeView::ModifyKnots()
{
for (i=0; i<KNOTS; i++)
{
ds[i] = (float)(rand() % 100)/80;
}
}
void CMyDischargeView::Line(float x1, float y1, float x2, float y2, float offset)
{
float k;
k = (y2-y1)/(x2-x1);
while (1)
{
glColor3f(0, 0, 0.3);
glTexCoord2f(0, 0); glVertex2f(x1-0.4, y1-0.4);
glTexCoord2f(1, 0); glVertex2f(x1+0.4, y1-0.4);
glTexCoord2f(1, 1); glVertex2f(x1+0.4, y1+0.2);
glTexCoord2f(0, 1); glVertex2f(x1-0.4, y1+0.2);
glColor4f(0.5, 0.5, 0.9, 1);
glTexCoord2f(0, 0); glVertex2f(x1-0.15, y1-0.15);
glTexCoord2f(1, 0); glVertex2f(x1+0.15, y1-0.15);
glTexCoord2f(1, 1); glVertex2f(x1+0.15, y1+0.15);
glTexCoord2f(0, 1); glVertex2f(x1-0.15, y1+0.15);
glColor4f(0, 0, 1, 0.3);
glTexCoord2f(0, 0); glVertex2f(x1-0.4, y1-0.2);
glTexCoord2f(1, 0); glVertex2f(x1+0.4, y1-0.2);
glTexCoord2f(1, 1); glVertex2f(x1+0.4, y1+0.4);
glTexCoord2f(0, 1); glVertex2f(x1-0.4, y1+0.4);
x1 += offset;
y1 += k*offset;
if (x1 >= x2) return;
}
}
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