第一次復制進去有影像結果，再打開檔案執行就只有視窗了
代碼如下：
#include <GL/glut.h>
GLsizei winWidth = 600, winHeight = 500; // Initial display window size.
GLint xRaster = 25, yRaster = 150; // Initialize raster position.
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 init(void)
{
glClearColor(1.0, 1.0, 1.0, 1.0); // White display window.
glMatrixMode(GL_PROJECTION);
gluOrtho2D(0.0, 600.0, 0.0, 500.0);
}
void lineGraph(void)
{
GLint month, k;
GLint x = 30; // Initialize x position for chart.
glClear(GL_COLOR_BUFFER_BIT); // Clear display window.
glColor3f(0.0, 0.0, 1.0); // Set line color to blue.
glBegin(GL_LINE_STRIP); // Plot data as a polyline.
for (k = 0; k < 12; k++)
glVertex2i(x + k * 50, dataValue[k]);
glEnd();
glColor3f(1.0, 0.0, 0.0); // Set marker color to red.
for (k = 0; k < 12; k++) { // Plot data as asterisk polymarkers.
glRasterPos2i(xRaster + k * 50, dataValue[k] - 4);
glutBitmapCharacter(GLUT_BITMAP_9_BY_15, '*');
}
glColor3f(0.0, 0.0, 0.0); // Set text color to black.
xRaster = 20; // Display chart labels.
for (month = 0; month < 12; month++) {
glRasterPos2i(xRaster, yRaster);
for (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();
gluOrtho2D(0.0, GLdouble(newWidth), 0.0, GLdouble(newHeight));
glClear(GL_COLOR_BUFFER_BIT);
}
void main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowPosition(100, 100);
glutInitWindowSize(winWidth, winHeight);
glutCreateWindow("Line Chart Data Plot");
init();
glutDisplayFunc(lineGraph);
glutReshapeFunc(winReshapeFcn);
glutMainLoop();
}
uj5u.com熱心網友回復：
http://blog.sina.com.cn/s/blog_64ecf78f0102xzvl.htmluj5u.com熱心網友回復：
嗯，VS卻不是書上的VS了，她總是善變的，動態的。轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/268726.html
標籤：C++ 語言