我想让我的形状保持旋转的时间,而我可以移动他们(左-右,下-上,前-后)使用键盘我添加了一个函数,称为timer()
,应该改变角度的立方体和金字塔的时间。 问题是GlutPostOverlayRedisplay();
函数的代码不断中断,它说:
在opengl.exe中的0x10004813(GLUT32.DLL)处引发异常:0xC0000005:读取位置0x00000020时发生访问冲突。
我怎样才能解决这个问题?为什么会出现这个问题? 这是代码:
#include <GL/glut.h>
int object = 0;
float xLeftRight[]{ 0, 0 };
float yDownUp[]{ 0, 0 };
float zFrontBack[]{ 0, 0 };
float PyramidAngle = 0.0;
float CupeAngle = 0.0;
int t_refresh = 20;//ms
float degree = 0;
float xscale = 1, yscale = 1, zscale = 1;
void Keyboard(int buttons, int x, int y)
{
switch (buttons)
{
case GLUT_KEY_F1: object = 0; break;
case GLUT_KEY_F2: object = 1; break;
case GLUT_KEY_LEFT: xLeftRight[object] -= 0.1; break;
case GLUT_KEY_RIGHT: xLeftRight[object] += 0.1; break;
case GLUT_KEY_DOWN: yDownUp[object] -= 0.1; break;
case GLUT_KEY_UP: yDownUp[object] += 0.1; break;
case GLUT_KEY_PAGE_UP: zFrontBack[object] -= 0.1; break;
case GLUT_KEY_PAGE_DOWN: zFrontBack[object] += 0.1; break;
}
glutPostRedisplay();
}
void Settings()
{
glClearColor(1, 1, 1, 0);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glShadeModel(GL_SMOOTH);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}
void DrawingFunction()//painting
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity(); //reset
glTranslatef(1.5f, 0.0f, -6.0f); // rotate left and back by time
glRotatef(PyramidAngle, 1.0f, 1.0f, 0.0f);
glColor3f(1.0, 0.0, 0.0);
glScalef(xscale, yscale, zscale);
glTranslatef(xLeftRight[0], yDownUp[0], zFrontBack[0]); //move the pyramid (if object = 0)
glBegin(GL_TRIANGLES);
// front
glColor3f(1.0f, 0.0f, 0.0f); //red
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f); //green
glVertex3f(-1.0f, -1.0f, 1.0f);
glColor3f(0.0f, 0.0f, 1.0f); //blue
glVertex3f(1.0f, -1.0f, 1.0f);
// right
glColor3f(1.0f, 0.0f, 0.0f); //red
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 0.0f, 1.0f); //blue
glVertex3f(1.0f, -1.0f, 1.0f);
glColor3f(0.0f, 1.0f, 0.0f); //green
glVertex3f(1.0f, -1.0f, -1.0f);
// back
glColor3f(1.0f, 0.0f, 0.0f); //red
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f); //green
glVertex3f(1.0f, -1.0f, -1.0f);
glColor3f(0.0f, 0.0f, 1.0f); //blue
glVertex3f(-1.0f, -1.0f, -1.0f);
// left
glColor3f(1.0f, 0.0f, 0.0f); //red
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 0.0f, 1.0f); //blue
glVertex3f(-1.0f, -1.0f, -1.0f);
glColor3f(0.0f, 1.0f, 0.0f); //green
glVertex3f(-1.0f, -1.0f, 1.0f);
glEnd();
glPopMatrix();
glPushMatrix();
glLoadIdentity();//(Reset model-view matrix)
glTranslatef(-2.0f, 0.0f, -7.0f); // rotate the cube right and back by time
glRotatef(CupeAngle, 1.0f, 0.0f, 0.0f);
glTranslatef(xLeftRight[1], yDownUp[1], zFrontBack[1]); //move the cube (if object = 1)
glBegin(GL_QUADS); //cube
glColor3f(1.0f, 0.0f, 1.0f);
glVertex3f(1.0f, 1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glColor3f(1.0f, 0.5f, 0.0f);
glVertex3f(1.0f, -1.0f, 1.0f);
glVertex3f(-1.0f, -1.0f, 1.0f);
glVertex3f(-1.0f, -1.0f, -1.0f);
glVertex3f(1.0f, -1.0f, -1.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(-1.0f, 1.0f, 1.0f);
glVertex3f(-1.0f, -1.0f, 1.0f);
glVertex3f(1.0f, -1.0f, 1.0f);
glColor3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, -1.0f, -1.0f);
glVertex3f(-1.0f, -1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, -1.0f);
glVertex3f(1.0f, 1.0f, -1.0f);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(-1.0f, 1.0f, 1.0f);
glVertex3f(-1.0f, 1.0f, -1.0f);
glVertex3f(-1.0f, -1.0f, -1.0f);
glVertex3f(-1.0f, -1.0f, 1.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, -1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(1.0f, -1.0f, 1.0f);
glVertex3f(1.0f, -1.0f, -1.0f);
glEnd();
glutSwapBuffers();
PyramidAngle += 1.0f; //changing the angle
CupeAngle -= 0.2f; //changing the angle
glPopMatrix();
}
void timer(int value)
{
glutPostOverlayRedisplay();
glutTimerFunc(t_refresh, timer, 0);
}
void ViewSetting(int x, int y)
{
int aspect = x / y;
glViewport(0, 0, x, y);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45, aspect, 0.1, 20);
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE);
glutInitWindowPosition(50, 50);
glutInitWindowSize(800, 600);
glutCreateWindow("3d shapes");
glutDisplayFunc(DrawingFunction);
glutReshapeFunc(ViewSetting);
glutSpecialFunc(Keyboard);
Settings();
glutTimerFunc(0, timer, 0);
glutMainLoop();
return 0;
}
GlutPostOverlayRedisplay
将当前窗口的覆盖层标记为需要重新显示(请参阅覆盖层管理)。
您必须使用GlutPostRedisplay
:
void timer(int value)
{
glutPostRedisplay();
glutTimerFunc(t_refresh, timer, 0);
}