图形学樱花飞舞.doc

操作指导6贴图-樱花飞舞一、 建立工程二、 添加函数和变量public:void mir();/定义镜面显示函数void un2();/定义花瓣void bmptomap();/定义纹理映射方式void mysky();/定义背景贴图FILE * myf;/定义一个贴图文件GLubyte image15125123;定义读取贴图的变量BOOL lkey;/定义动画开关int si;/定义落花瓣的数目float psnow606;/定义60片花瓣的位置、角度CClientDC *my_pDC;CRect my_oldRect;BOOL mytbar;BOOL mysbar;三、 添加消息响应函数OnTimer()。四、 初始化变量CCmyView:CCmyView()/ TODO: add construction code here my_pDC=NULL;mytbar=FALSE;mysbar=FALSE; lkey=TRUE;for(int i=0;i60;i+)psnowi1=1.0f*(rand()-rand()/RAND_MAX;psnowi2=1.0f*(rand()-rand()/RAND_MAX;psnowi0=1.0f*(-rand()/RAND_MAX;psnowi3=90.0f*(rand()-rand()/RAND_MAX;psnowi4=90.0f*(rand()-rand()/RAND_MAX;psnowi5=90.0f*(rand()-rand()/RAND_MAX;si=-59;/打开文件j。bmp，从位图的第54个字节开始是图像信息，将色彩传给imagel/位图要求为23位521*512。if(!(myf=fopen(j.bmp,rb)return;else fseek(myf,54,SEEK_SET); fread(image1,sizeof(unsigned char),512*512*3,myf);五、 建工具栏 ID_BUTTONyh 并添加响应函数：void CCmyView:OnButtonyh() / TODO: Add your command handler code hereif(lkey)SetTimer(1, 120, NULL);elseKillTimer(1);lkey=!lkey;Invalidate(FALSE);六、 加上/ cmyView.cpp : implementation of the CCmyView class/#include stdafx.h#include cmy.h#include MainFrm.h#include Math.h#include cmyDoc.h#include cmyView.h#define ABS(x) (x)0 ? (x) : 0)#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endif七、 在OnDraw（）中改背景glClearColor(0.2f,0.2f,0.2f,0.9f);八、 在OnCreat（）中建立花瓣的显示列表语句int CCmyView:OnCreate(LPCREATESTRUCT lpCreateStruct) if (CView:OnCreate(lpCreateStruct) = -1)return -1;/ TODO: Add your specialized creation code heremyfirst();glNewList(1,GL_COMPILE); un2();glEndList();return 0;九、void CCmyView:OnDestroy() CView:OnDestroy();/ TODO: Add your message handler code hereKillTimer(1);HGLRChrc;hrc = :wglGetCurrentContext(); :wglMakeCurrent(NULL, NULL); if (hrc) :wglDeleteContext(hrc); if (my_pDC) delete my_pDC;十、void CCmyView:OnTimer(UINT nIDEvent) / TODO: Add your message handler code here and/or call defaultif(nIDEvent=1)if(si=59)si=-59;/定义花瓣的数目不超过60for(int i=0;i(60-ABS(si);i+)/花瓣的位置变化if(psnowi1=-0.8f)/花瓣落到底部，重新定义si+;/一片片落下，花瓣增加psnowi0=1.0f*(-rand()/RAND_MAX;psnowi1=1.0f*(rand()/RAND_MAX;psnowi2=1.0f*(rand()-rand()/RAND_MAX;psnowi3=90.0f*(rand()-rand()/RAND_MAX;psnowi4=90.0f*(rand()-rand()/RAND_MAX;psnowi5=90.0f*(rand()-rand()/RAND_MAX;else/花瓣边落下边变化psnowi0=psnowi0+0.02f*(rand()-rand()/RAND_MAX;psnowi1=psnowi1-0.02f;psnowi2=psnowi2+0.02f*(rand()-rand()/RAND_MAX;psnowi3=psnowi5+60.0f*(rand()-rand()/RAND_MAX;psnowi4=psnowi6+60.0f*(rand()-rand()/RAND_MAX;psnowi5=psnowi6+60.0f*(rand()-rand()/RAND_MAX;Invalidate(FALSE);/更新显示CView:OnTimer(nIDEvent);十一、绘画void CCmyView:mydraw()glTranslatef(0.0f,0.0f,-7.0f);/移动到视区内显示glEnable(GL_LINE_SMOOTH);/线与多边形反走样glPushMatrix();glScalef(0.9f,0.9f,0.9f);/调整充满画面mysky();/绘制背景贴图glPopMatrix();for(int i=0;i(60-ABS(si);i+)/绘制60片花瓣glPushMatrix();glTranslatef(psnowi0,psnowi1,psnowi2);glRotated(psnowi3,1.0,0.0,0.0);glRotated(psnowi4,0.0,1.0,0.0);glRotated(psnowi5,0.0,0.0,1.0);glCallList(1);/调用花瓣列表glPopMatrix();glPushMatrix();glScalef(0.8f,1.0f,0.8f);/缩放为长方形glTranslatef(0.8f,0.22f,0.4f);/移动glRotated(-30,0.0,1.0,0.0);/转动mir();/绘制镜子glPopMatrix();glDisable(GL_LINE_SMOOTH);/关闭反走样void CCmyView:mysky()glPushMatrix();glRotated(90,1.0,0.0,0.0);glTexImage2D(GL_TEXTURE_2D,0,3,512,512,0,GL_BGR_EXT,GL_UNSIGNED_BYTE,image1); bmptomap();glBegin(GL_QUADS);glTexCoord2f(0.0f,1.0f);glVertex3f(-2.2f,0.0f,-1.50f);glTexCoord2f(0.0f,0.0f);glVertex3f(-2.2f,0.0f,1.50f);glTexCoord2f(1.0f,0.0f);glVertex3f(2.2f,0.0f,1.5f);glTexCoord2f(1.0f,1.0f);glVertex3f(2.2f,0.0f,-1.5f); glEnd();glPopMatrix();glDisable(GL_TEXTURE_2D);十二、花瓣void CCmyView:un2()float rx=1.0f;float ange1=3.1416f/3.0f;float ange2=0.0f;float k=-14.5;glPushMatrix();glScalef(0.04f,0.04f,0.12f);glTranslatef(-0.5f,-0.5,0.0f);/for(float i=0;i30;i+)ange2=3.1416f/180.0f*i; glShadeModel(GL_SMOOTH); glPolygonMode(GL_FRONT_AND_BACK,GL_FILL); glBegin(GL_QUAD_STRIP); for(float j=0;j=1.5708f)else rx=1.0f-0.01f*(k*k)/14-14)*(1-j/35);glColor3f(rx*rx*sinf(ange1),rx*cosf(ange1)*cosf(ange2)/2,rx*cosf(ange1)*cosf(ange2);glVertex3f(rx*cosf(ange1)*cosf(ange2), rx*sinf(ange1), -rx*cosf(ange1)*sinf(ange2); ange1=3.1416f/3.0f+3.1416f/190.0f*(k+1.0f)*(k+1.0f)/14-14)+3.1416f/180.0f*j; rx=1.0f-0.01f*(k+1.0f)*(k+1.0f)/14-14)*(1-j/35);glVertex3f(rx*cosf(ange1)*cosf(ange2+3.1416f/180.0f), rx*sinf(ange1), -rx*cosf(ange1)*sinf(ange2+3.1416f/180.0f); ; ;glEnd();k=k+1;if(k=15.5) k=-14.5f;glPopMatrix();十三、镜子的绘制void CCmyView:mir()glPushMatrix();GLubyte image35125123;/定义一个临时变量glReadPixels(0,0, /读取屏幕坐标的图像到变量中512,512,GL_RGB,GL_UNSIGNED_BYTE,image3);/将变量映射为纹理glTexImage2D(GL_TEXTURE_2D,0,3,512,512,0,GL_RGB,GL_UNSIGNED_BYTE,image3);/调用纹理控制定义与融合定义函数 bmptomap();/开始绘制镜子/定义纹理坐标的同时定义顶点glBegin(GL_QUADS);glTexCoord2f(1.0f,0.0f);glVertex3f(0.0f,-1.0f,1.0f);glTexCoord2f(1.0f,1.0f);glVertex3f(0.0f,0.0f,1.0f);glTexCoord2f(0.0f,1.0f);glVertex3f(1.0f,0.0f,1.0f);glTexCoord2f(0.0f,0.0f);glVertex3f(1.0f,-1.0f,1.0f); glEnd();/关闭纹理glDisable(GL_TEXTURE_2D);/绘制镜子边，采用平滑渲染 glShadeModel(GL_SMOOTH); glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);/边线模式glLineWidth(4.0f);/线宽/绘制镜子边glBegin(GL_QUADS);glColor3f(0.5f,0.5f,0.0f);glVertex3f(0.0f,-1.0f,1.0f);glVertex3f(0.0f,0.0f,1.0f);glColor3f(1.0f,0.5f,0.0f);glVertex3f(1.0f,0.0f,1.0f);glVertex3f(1.0f,-1.0f,1.0f);glEnd();/恢复平面绘制模式 glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);glPopMatrix();十四、定义纹理控制与融合显示方式void CCmyView:bmptomap()/纹理控制方式定义glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP);glTexParameterf(GL_TEXTURE_2D