openGL 消隐问题

aiming0420

这是一个困扰我达半年之久的问题，使用深度测试后不仅不能消隐，而且还带有闪烁。程序源代码如下，可以编译运行，望各位大侠不吝赐教。
#include <math.h>
#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>
#include <gl/glut.h>
static GLfloat angle=0;
static GLfloat centerx=0,centery=0,centerz=0,eyex=0,eyey=0,eyez=2;


void Init(void)
{
glClearColor(0,0,0,1.0);
glClearDepth(1.0);
glShadeModel(GL_SMOOTH);
glEnable (GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glDepthMask(GL_TRUE);
}

void display(void)
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(2 * sin((180/3.141592654)*angle + 3.141592654),eyey,-2 * cos((180/3.141592654)*angle +3.141592654),0,0,0,0.0,1.0,0.0);


glRotatef(angle,0,1,0);
glBegin(GL_POLYGON);
glColor3f(1.0,0.0,0.0);
glVertex3f(1,1,0);
glVertex3f(1,-1,0);
glVertex3f(-1,-1,0);
glVertex3f(-1,1,0);
glEnd();

glBegin(GL_POLYGON);
glColor3f(0.0,1.0,0.0);
glVertex3f(0,1,-1);
glVertex3f(0,1,1);
glVertex3f(0,-1,1);
glVertex3f(0,-1,-1);
glEnd();
glutSwapBuffers();
}

void spinDisplay()
{
angle += 0.00001;
glutPostRedisplay();
}

void reshape(int w,int h)
{
glViewport(0,0,(GLsizei) w,(GLsizei) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(90,(GLfloat)w/(GLfloat)h,0.0,5.0);
}

void mouse(int button, int state, int x, int y)
{
switch(button) {
case GLUT_LEFT_BUTTON:
if (state == GLUT_DOWN)
glutIdleFunc(spinDisplay);
break;

case GLUT_RIGHT_BUTTON:
if (state == GLUT_DOWN)
glutIdleFunc(NULL);
break;

default:
break;
}
}

int main(int argc, char** argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH);
glutInitWindowSize(500,500);
glutInitWindowPosition(100,100);
glutCreateWindow("depthTest");
Init();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMouseFunc(mouse);
glutMainLoop();
return 0;
}

aiming0420

程序说明：
在XOY 和 YOZ平面各画一个正方形，两个正方形的对称轴都是Y轴，即两个正方形在Y轴相交。视点中心在坐标原点，即centerx = centery = centerz = 0;观察点绕以坐标原点为中点，半径为2的圆在XOZ平面内做圆周运动。

snhun

void reshape(int w,int h)
{
glViewport(0,0,(GLsizei) w,(GLsizei) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(90,(GLfloat)w/(GLfloat)h,0.0,5.0);
}

你把红色部分改成 1.0 试试吧.[em10]

oz01

gluPerspective(90,(GLfloat)w/(GLfloat)h,0.0,5.0);

这视角也太..............
我个人建议
gluPerspective(45,(GLfloat)w/(GLfloat)h,0.1,5.0);

aiming0420

谢谢关心，问题正如二楼所说。谢谢

snhun

aiming0420: RepenGL 消隐问题

谢谢关心，问题正如二楼所说。谢谢

[em10]二喽?
正如二楼所说?
二楼好像是你自己哦.[em10]

krisdy

楼上的回答正确，呵呵

krisdy

gluLookAt(2 * sin((180/3.141592654)*angle + 3.141592654),eyey,-2 * cos((180/3.141592654)*angle +3.141592654),0,0,0,0.0,1.0,0.0);
这个地方，楼主是怎么推出来的？