使用opengl程序?qū)崿F(xiàn)某種圖案填充多邊形.doc

GIS專業(yè)實驗報告（計算機圖形學(xué)）實驗6 使用opengl程序?qū)崿F(xiàn)某種圖案填充多邊形姓名系別班級學(xué)號實驗日期指導(dǎo)教師實驗成績一 實驗?zāi)康募耙笫褂胦pengl程序?qū)崿F(xiàn)某種圖案填充多邊形。二 理論基礎(chǔ)1. 紋理：計算機圖形學(xué)中的紋理既包括通常意義上物體表面的紋理即使物體表面呈現(xiàn)凹凸不平的溝紋,同時也包括在物體的光滑表面上的彩色圖案,通常我們更多地稱之為花紋.2. 紋理映射（Texture Mapping）：是將紋理空間中的紋理像素映射到屏幕空間中的像素的過程。能夠模擬物體表面顏色細節(jié)或幾何細節(jié)的計算機圖形學(xué)技術(shù)成為紋理映射技術(shù)（Texture mapping technology）。利用紋理映射技術(shù)，可以在不增加場景復(fù)雜度，不顯著增加計算量的前提下，大幅度提高圖形的真實感。三 算法設(shè)計與分析程序源碼如下：#include #include #include void Initial(void)glClearColor( 0.0f, 0.0f, 0.0f, 0.0f); /設(shè)置窗口背景顏色為黑色glMatrixMode(GL_PROJECTION); /設(shè)置投影參數(shù)gluOrtho2D(50.0,200.0,0.0,200.0);void Display(void) glTranslatef(30.0, 30.0, 0.0); /移動坐標原點glClear(GL_COLOR_BUFFER_BIT); /用當前背景色填充窗口glColor3f(1.0f, 0.0f, 0.0f); /設(shè)置當前的繪圖顏色為紅色 GLubyte fly = 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x03,0x80,0x01,0xc0,0x06,0xc0,0x03,0x60, 0x04,0x60,0x06,0x20,0x04,0x30,0x0c,0x20, 0x04,0x18,0x18,0x20,0x04,0x0c,0x30,0x20, 0x04,0x06,0x60,0x20,0x44,0x03,0xc0,0x22, 0x44,0x01,0x80,0x22,0x44,0x01,0x80,0x22, 0x44,0x01,0x80,0x22,0x44,0x01,0x80,0x22, 0x44,0x01,0x80,0x22,0x44,0x01,0x80,0x22, 0x66,0x01,0x80,0x66,0x33,0x01,0x80,0xcc, 0x19,0x81,0x81,0x98,0x0c,0xc1,0x83,0x30, 0x07,0xe1,0x87,0xe0,0x03,0x3f,0xfc,0xc0, 0x03,0x31,0x8c,0xc0,0x03,0x33,0xcc,0xc0, 0x06,0x64,0x26,0x60,0x0c,0xcc,0x33,0x30, 0x18,0xcc,0x33,0x18,0x10,0xc4,0x23,0x08, 0x10,0x63,0xc6,0x08,0x10,0x30,0x0c,0x08, 0x10,0x18,0x18,0x08,0x10,0x00,0x00,0x08; glEnable(GL_POLYGON_STIPPLE); /啟用多邊形填充模式 glPolygonStipple(fly); glRectf(50.0,50.0,125.0,125.0); glFlush(); int main(int argc, char* argv)glutInit(&argc, argv);glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);glutInitWindowSize(600,450); glutInitWindowPosition(100,100); glutCreateWindow(OpenGL矩形填充); glutDisplayFunc(Display); Initial();glutMainLoop(); return 0;四.程序調(diào)試及運行結(jié)果的自我分析與自我評價代碼中通過GLubyte創(chuàng)建了一個名為“rubik”的紋理，然后用glPolygonStipple(rubik);調(diào)用并填充用glRectf繪制的