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我正在OpenGL中制作一个包含地面(绘制为线循环)的3D项目。我的问题是当只有一个单一的线绘制如图所示的下一个图像中的项目启动:Polyline只在调整窗口大小后才完成渲染
当我调整或将窗口最大化,那么实际地被显示如下:
任何想法如何解决这个问题?我是OpenGL编程的初学者。
下面是代码:
void drawHook(void);
void timer(int);
void drawFlorr();
float L = 100;
const int screenWidth = 1000; // width of screen window in pixels
const int screenHeight = 1000; // height of screen window in pixels
float ww = 800;
float wh = 800;
float f = 520, n = 10.0;
static GLdouble ort1[] = { -200, 200, -33, 140 };
static GLdouble viewer[] = { 525, 25, -180 };
static GLdouble objec[] = { 525.0, 25, -350 };
float x, y = 0.0, z, z1;
float xmax = screenWidth - 200.0;
float zmax = screenWidth - 200.0;
float xmin, zmin;
float step = 5.0;
float fov = 80;
void myInit(void)
{
glClearColor(0.0,0.0,0.0,0.0); // background color is white
glPointSize(2.0); // a 'dot' is 2 by 2 pixels
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0, screenWidth, 0.0, screenHeight);//dino window
glViewport(0, 0, screenWidth, screenHeight);
}
void myDisplay(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
gluLookAt(viewer[0], viewer[1], viewer[2], objec[0], objec[1], objec[2], 0, 1, 0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(fov, 1.333, n, f);
glPointSize(2.0);
glMatrixMode(GL_MODELVIEW);
drawFlorr();
glutSwapBuffers();
}
int main(int argc, char** argv)
{
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB); // set display mode
glutInitWindowSize(screenWidth, screenHeight); // set window size
glutInitWindowPosition(10, 10); // set window position on screen
glutCreateWindow("Dino Line Drawing"); // open the screen window
glutDisplayFunc(myDisplay); // register redraw function
myInit();
//glutTimerFunc(1,timer,1);
glutMainLoop(); // go into a perpetual loop
return 1;
}
void drawFlorr()
{
xmin = -100;
zmin = -100;
for (x = xmin; x < xmax; x += step)
{
for (z = zmin; z < zmax; z += step)
{
z1 = -z;
glBegin(GL_LINE_LOOP);
glVertex3f(x, y, z1);
glVertex3f(x, y, z1-step+1.0);
glVertex3f(x + step - 1.0, y, z1 - step + 1.0);
glVertex3f(x+step-1.0, y, z1);
glEnd();
}
}
}
而且清晰的颜色不是白色的。 – BDL
感谢@derhass为你的suggesstion工作,我一定会遵循现代Open gl <3 –