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我正在OpenGL中製作一個包含地面(繪製爲線循環)的3D項目。我的問題是當只有一個單一的線繪製如圖所示的下一個圖像中的項目啓動:Polyline只在調整窗口大小後才完成渲染
當我調整或將窗口最大化,那麼實際地被顯示如下:
任何想法如何解決這個問題?我是OpenGL編程的初學者。
下面是代碼:
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();
}
}
}
而且清晰的顏色不是白色的。 – BDL
感謝@derhass爲你的suggesstion工作,我一定會遵循現代Open gl <3 –