OpenGL.rar_OPENGL 纹理_opengl_opengl 纹理贴图_opengl纹理贴图_镂空效果

#include"Gl\glut.h" #include<stdio.h> #include<stdlib.h> void myDisplay(void){ glClear(GL_COLOR_BUFFER_BIT); //glRectf(-0.5f,-0.5f,0.5f,0.5f); /* *以下代码为画不正规的五角星 * glBegin(GL_LINE_STRIP); glVertex2f(-0.3f,0.0f); glVertex2f(0.3f,0.0f); glVertex2f(-0.2f,-0.2f); glVertex2f(0.0f,0.3f); glVertex2f(0.2f,-0.2f); glVertex2f(-0.3f,0.0f); glEnd(); */ /* *以下代码为画两个成镜像的正方形 * */ /* glPolygonMode(GL_FRONT,GL_FILL); glPolygonMode(GL_BACK,GL_LINE); glFrontFace(GL_CW); //glFrontFace(GL_CCW); glBegin(GL_POLYGON); glVertex2f(-0.5f,-0.5f); glVertex2f(0.0f,-0.5f); glVertex2f(0.0f,0.0f); glVertex2f(-0.5f,0.0f); glEnd(); glBegin(GL_POLYGON); glVertex2f(0.0f,0.0f); glVertex2f(0.0f,0.5f); glVertex2f(0.5f,0.5f); glVertex2f(0.5f,0.0f); glEnd(); */ static GLubyte Mask[128]= { 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, 0x03,0x3F,0xFC,0xC0, 0x06,0x64,0x26,0x60, 0x0C,0xCC,0x33,0x30, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00 }; FILE *fp; fp=fopen("loukongtestpic.bmp","rb"); if(!fp) { printf("Can not find the bmp!"); while(1); } if(fseek(fp,-(int)sizeof(Mask),SEEK_END)) { printf("Fseek erro!"); while(1); }; if(!fread(Mask,sizeof(Mask),1,fp)) { printf("Freed erro!"); while(1); }; fclose(fp); glClear(GL_COLOR_BUFFER_BIT); glEnable(GL_POLYGON_STIPPLE); glPolygonStipple(Mask); glRectf(-0.5f,-0.5f,0.0f,0.0f); // 在左下方绘制一个有镂空效果的正方形 glDisable(GL_POLYGON_STIPPLE); glRectf(0.0f,0.0f,0.5f,0.5f); // 在右上方绘制一个无镂空效果的正方形 glFlush(); } int main(int argc, char *argv[]){ glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE); glutInitWindowPosition(100,100); glutInitWindowSize(400,400); glutCreateWindow("实验一 内容四 图形镂空实验"); glutDisplayFunc(&myDisplay); glutMainLoop(); return 0; }