雨滴波纹核心代码

￡神魔★判官ぃ 2022-08-05 13:17 188阅读 0赞

一、案例效果图：

![20150407174758414][]

二、源代码下载地址：http://download.csdn.net/detail/sh15285118586/8571025\#comment

三、核心代码部分：

BOOL CMyRainsView::RenderScene() 
    {
    	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    	glLoadIdentity();
    	gluLookAt(250, 250, 250, 0, 0, 0, 0, 1, 0);
    	glColor3f(1, 1, 1);
    	
    	DrawModel();
    
    	if ((rand() % 2) == 0) 
    	{
    		wavemap[nmap][(rand() % (MAPY-2))+1][(rand() % (MAPX-2))+1] = 50;
    		wavemap[cmap][(rand() % (MAPY-2))+1][(rand() % (MAPX-2))+1] = 50;
    	}
    
    	glTranslatef(-128, 0, -128);
    	ProcessWave();
    	DrawWave();
    	InvertWaveMap();
    	glLoadIdentity();
    
    
    	::SwapBuffers(m_pDC->GetSafeHdc());		//交互缓冲区
    	return TRUE;
    }
    
    void CMyRainsView::ProcessWave()
    {
    	float temp;
    	for (int i=1; i<MAPY-1; i++)
    		for (int j=1; j<MAPX-1; j++)
    		{
    			temp = ((wavemap[cmap][i-1][j] + 
    					wavemap[cmap][i+1][j] + 
    				    wavemap[cmap][i][j-1] + 
    				    wavemap[cmap][i][j+1] +
    					wavemap[cmap][i-1][j+1] + 
    					wavemap[cmap][i+1][j+1] + 
    					wavemap[cmap][i-1][j-1] + 
    					wavemap[cmap][i+1][j-1]) / 4)-wavemap[nmap][i][j];			
    			temp = temp - (temp / damp);
    			if (temp < 0.01) temp = 0;
    			wavemap[nmap][i][j] = temp;
    		}
    }
    
    void CMyRainsView::InvertWaveMap()
    {
    	int temp = cmap;
    	cmap = nmap;
    	nmap = temp;
    }
    
    void CMyRainsView::DrawWave()
    {
    	int i, j;
    	glDisable(GL_TEXTURE_2D);	
    	glColor4f(1, 1, 1, 0.1);
    	glBegin(GL_TRIANGLES);
    	for (i=0; i<MAPY-1; i++)
    	{
    		for (j=0; j<MAPX-1; j++)
    		{
    			glVertex3f(j*2, wavemap[cmap][i][j], i*2);
    			glVertex3f((j+1)*2, wavemap[cmap][i+1][j+1], (i+1)*2);
    			glVertex3f(j*2, wavemap[cmap][i+1][j], (i+1)*2);
    
    			glVertex3f(j*2, wavemap[cmap][i][j], i*2);
    			glVertex3f((j+1)*2, wavemap[cmap][i][j+1], i*2);
    			glVertex3f((j+1)*2, wavemap[cmap][i+1][j+1], (i+1)*2);
    		}
    	}
    	glEnd();
    	glEnable(GL_TEXTURE_2D);	
    }

很遗憾，关键的算法我没看懂！！！！

[20150407174758414]: /images/20220805/777ba7e74079464f81ae00818ac8757f.png