CLion MinGW 快速配置 OpenGL GLUT 环境的方法（配图）
#include <GL/>
GLsizei winWidth = 600, winHeight = 500;
GLubyte label[36] = {'J', 'a', 'n', 'F', 'e', 'b', 'M', 'a', 'r',
'A', 'p', 'r', 'M', 'a', 'y', 'J', 'u', 'n',
'J', 'u', 'l', 'A', 'u', 'g', 'S', 'e', 'p',
'O', 'c', 't', 'N', 'o', 'v', 'D', 'e', 'c'};
GLint dataValue[12] = {420, 342, 324, 310, 262, 185, 190, 196, 217, 240, 312, 438};
void initWindow(int argc, char* argv[]) {
glutInit(&argc, argv);
glutInitWindowSize(winWidth, winHeight);
glutInitWindowPosition(100, 100);
glutCreateWindow("P105");
}
void initBackground() {
glClearColor(1, 1, 1, 0);
glMatrixMode(GL_PROJECTION);
//glOrtho(0, winWidth, 0, winHeight, -1, 1);
gluOrtho2D(0, winWidth, 0, winHeight);
}
void lineGraph() {
GLint xRaster = 25, yRaster = 150;
glClear(GL_COLOR_BUFFER_BIT);
glColor3d(0, 0, 1);
glBegin(GL_LINE_STRIP);
for (GLint k = 0; k < 12; k ++) {
glVertex2i(xRaster + k * 50, dataValue[k]);
}
glEnd();
glColor3d(1, 0, 0);
for (GLint k = 0; k < 12; k ++) {
glRasterPos2i(xRaster + k * 50, dataValue[k] - 4);
glutBitmapCharacter(GLUT_BITMAP_9_BY_15, '*');
}
glColor3d(0, 0, 0);
xRaster = 20;
for (GLint month = 0; month < 12; month ++) {
glRasterPos2i(xRaster, yRaster);
for (GLint k = 3 * month; k < 3 * month + 3; k ++) {
glutBitmapCharacter(GLUT_BITMAP_HELVETICA_12, label[k]);
}
xRaster += 50;
}
glFlush();
}
void barChart() {
GLint xRaster = 20, yRaster = 150;
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1, 0, 0);
for (GLint k = 0; k < 12; k ++) {
glRecti(20 + k * 50, 165, 40 + k * 50, dataValue[k]);
}
glColor3d(0, 0, 0);
for (GLint month = 0; month < 12; month ++) {
glRasterPos2i(xRaster, yRaster);
for (GLint k = 3 * month; k < 3 * month + 3; k ++) {
glutBitmapCharacter(GLUT_BITMAP_HELVETICA_12, label[k]);
}
xRaster += 50;
}
glFlush();
}
void winReshapeFcn(GLint newWidth, GLint newHeight) {
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, (GLdouble)newWidth, 0, (GLdouble)newHeight, -1, 1);
glClear(GL_COLOR_BUFFER_BIT);
}
int main(int argc, char* argv[]) {
initWindow(argc, argv);
initBackground();
//glutDisplayFunc(lineGraph);
glutDisplayFunc(barChart);
glutReshapeFunc(winReshapeFcn);
glutMainLoop();
return 0;
}