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POMove a ball in bowling game once a key is pressed
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  1. POMove a ball in bowling game once a key is pressed
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    copied!<p>I have been working with bowling game in C++.</p> <p>I want only one thing that I want to move the ball only once a key is pressed and the bowl moves smoothly(not like now as it moves by pressing and holding down UP-KEY).</p> <p>Here is the code: -</p> <pre><code>#include &lt;GL/glut.h&gt; #include &lt;cmath&gt; GLfloat posX = 0.07, posY = 0.1, posZ = 0.0, firstx1 = 0.02, firsty1 = 0.3, firstx2 = 0.07, firsty2 = 0.3, firstx3 = 0.11, firsty3 = 0.3, secondx1 = -0.16, secondy1 = 0.3, secondx2 = -0.21, secondy2 = 0.3, secondx3 = -0.27, secondy3 = 0.3, thirdx1 = 0.3, thirdy1 = 0.3, thirdx2 = 0.35, thirdy2 = 0.3, thirdx3 = 0.4, thirdy3 = 0.3; double x, y, angle; #define PI 3.1415926535898 GLint circle_points = 50; void bottle() { glColor3f(0.0, 0.0, 1.0); glPointSize(9.0); glBegin(GL_POINTS); glVertex3f(firstx1, firsty1, 0.0); glVertex3f(firstx2, firsty2, 0.0); glVertex3f(firstx3, firsty3, 0.0); glVertex3f(secondx1, secondy1, 0.0); glVertex3f(secondx2, secondy2, 0.0); glVertex3f(secondx3, secondy3, 0.0); glVertex3f(thirdx1, thirdy1, 0.0); glVertex3f(thirdx2, thirdy2, 0.0); glVertex3f(thirdx3, thirdy3, 0.0); glEnd(); glFlush(); } void circ() { glColor3f(0.0, 0.0, 1.0); glBegin(GL_TRIANGLE_FAN); for (int i = 0; i &lt;= 300; i++) { angle = 2 * PI * i / 300; x = cos(angle) / 25; y = sin(angle) / 20; glVertex2d(x, y); } glEnd(); } void display() { glClearColor(1.0, 1.0, 1.0, 0.0); glClear(GL_COLOR_BUFFER_BIT); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(-1.0, 1.0, -1.0, 1.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glPushMatrix(); bottle(); glPopMatrix(); glPushMatrix(); glTranslatef(posX, posY, posZ); circ(); glPopMatrix(); glutSwapBuffers(); } float move_unit = 0.01; void keyboardown(int key, int x, int y) { switch (key) { case GLUT_KEY_RIGHT: posX += 0.3; break; case GLUT_KEY_LEFT: posX -= 0.3; break; case GLUT_KEY_UP: posY += move_unit; break; case GLUT_KEY_DOWN: posY -= move_unit; break; default: break; } if ((posX &gt;= firstx1 &amp;&amp; posX &lt;= firstx3) &amp;&amp; (posY == firsty1 &amp;&amp; posY == firsty2 &amp;&amp; posY == firsty3)) { firstx1 += 0.02; firsty1 += 0.03; firstx2 += -0.06; firsty2 += 0.02; firstx3 += 0.03; firsty3 += 0.05; } if ((posX &lt;= secondx1 &amp;&amp; posX &gt;= secondx3) &amp;&amp; (posY == secondy1 &amp;&amp; posY == secondy2 &amp;&amp; posY == secondy3)) { secondx1 += 0.02; secondy1 += 0.02; secondx2 += -0.06; secondy2 += 0.02; secondx3 += 0.03; secondy3 += 0.05; } if ((posX &gt;= thirdx1 &amp;&amp; posX &lt;= thirdx3) &amp;&amp; (posY == thirdy1 &amp;&amp; posY == thirdy2 &amp;&amp; posY == thirdy3)) { thirdx1 += 0.02; thirdy1 += 0.03; thirdx2 += -0.07; thirdy2 += 0.02; thirdx3 += 0.03; thirdy3 += 0.05; } glutPostRedisplay(); } int main(int argc, char** argv) { glutInit(&amp;argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB); glutInitWindowSize(500, 300); glutInitWindowPosition(150,250); glutCreateWindow("Balling Game"); glutDisplayFunc(display); glutSpecialFunc(keyboardown); glutMainLoop(); } </code></pre>
 

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