我想制作一个游戏,当有人单击移动的球时,它会破裂。我添加了动画和鼠标单击事件的代码,但是当动画进行时,单击功能不起作用。当我尝试不使用动画时,它可以正常工作。我想知道为什么会这样。
#include<stdio.h>
#include<GL/glut.h>
#include<unistd.h>
#include<math.h>
int x, y;
float mx, my;
float i, j;
void mouse(int button, int state, int mousex, int mousey)
{
if(button==GLUT_LEFT_BUTTON && state==GLUT_DOWN)
{
mx = mousex;
my = mousey;
printf("%f %f\n",mx,my);
glutPostRedisplay();
}
}
void init()
{
glClearColor(0.0, 0.0, 0.0, 1.0);
glColor3f(0.0, 1.0, 0.0);
glPointSize(1.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0, 1560, 0, 840);
}
int randValue()
{
int i = rand();
int num = i%1000;
return num;
}
void blast(int x, int y)
{
glBegin(GL_POLYGON);
glColor3f(1.0f,0.0f,0.0f);
glVertex2i(x-100, y-100);
glVertex2i(x, y-100);
glVertex2i(x-22, y-20);
glVertex2i(x-100, y-30);
glVertex2i(x-30, y-40);
glVertex2i(x-150, y-80);
glVertex2i(x-20, y);
glVertex2i(x, y-40);
glVertex2i(x-66, y-125);
glVertex2i(x-34, y-32);
glVertex2i(x-32, y-55);
glVertex2i(x-32, y);
glVertex2i(x-60, y-57);
glVertex2i(x-75, y-69);
glVertex2i(x-100, y);
glEnd();
glFlush();
}
void display()
{
int j = 0, k = 0, l = 1;
while(1)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(0.0, 1.0, 0.0);
glBegin(GL_POINTS);
for (i = 0;i < 6.29;i += 0.001)
{
x = 100 * cos(i);
y = 100 * sin(i);
glVertex2i(x / 2 + j, y / 2 + k);
if((x / 2 + j) >= 1560 || (y / 2 + k) >= 840)
{
glEnd();
glFlush();
glClear(GL_COLOR_BUFFER_BIT);
blast(x / 2 + j, y / 2 + k);
sleep(2);
j = randValue();
k = 0;
}
}
j = j + 3;
k = k + 5;
glEnd();
glFlush();
}
}
int main (int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(1360, 768);
glutInitWindowPosition(0, 0);
glutCreateWindow("{Project}");
init();
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMainLoop();
}
您的代码在display
函数内部具有无限循环,因此您永远不会将控件交还给GLUT。GLUT内部已经有一个无限循环glutMainLoop
。
相反,您只应在,发布和返回中渲染一个帧:display
glutPostRedisplay
void display()
{
glClear(GL_COLOR_BUFFER_BIT);
// ... draw the frame here ...
// for exmaple:
i += 0.001;
float x = 100 * cos(i);
float y = 100 * sin(i);
glColor3f(0.0, 1.0, 0.0);
glBegin(GL_POINTS);
glVertex2f(x, y);
glEnd();
glFlush();
glutPostRedisplay();
}
然后您的mouse
函数将被调用,您将能够根据需要更新状态。
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