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Update from John: Includes mouse button, mouse motion, and mouse wheel

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@301 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
rkrolib 2003-11-06 21:38:21 +00:00
parent 0b588cdcb7
commit 406636047f
1 changed files with 57 additions and 1 deletions
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58
freeglut/freeglut/progs/demos/Fractals_random/fractals_random.c
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@ -67,7 +67,7 @@ static void draw_level ( int num, double m00, double m01, double m10, double m11
double new_x = affine[random].a00 * current_x + affine[random].a01 * current_y + affine[random].b0 ; double new_x = affine[random].a00 * current_x + affine[random].a01 * current_y + affine[random].b0 ;
double new_y = affine[random].a10 * current_x + affine[random].a11 * current_y + affine[random].b1 ; double new_y = affine[random].a10 * current_x + affine[random].a11 * current_y + affine[random].b1 ;
glVertex2f ( new_x, new_y ) ; glVertex2d ( new_x, new_y ) ;
current_x = new_x ; current_x = new_x ;
current_y = new_y ; current_y = new_y ;
} }
@ -200,6 +200,59 @@ Special(int key, int x, int y)
} }
static int mouse_x = 0, mouse_y = 0 ;
static int button_down = GLUT_DOWN ;
static void
Mouse ( int button, int updown, int x, int y )
{
button_down = updown ;
if ( updown == GLUT_DOWN )
{
mouse_x = x ;
mouse_y = y ;
}
}
static void
MouseMotion ( int x, int y )
{
int window_width = glutGet ( GLUT_WINDOW_WIDTH ) ;
int window_height = glutGet ( GLUT_WINDOW_HEIGHT ) ;
int window_size = ( window_width < window_height ) ? window_width : window_height ;
double delta_x = 5.0 * (double)(x - mouse_x) / (double)(window_size) ;
double delta_y = 5.0 * (double)(y - mouse_y) / (double)(window_size) ;
xwin += delta_x * scale_factor ;
ywin -= delta_y * scale_factor ;
glMatrixMode ( GL_MODELVIEW ) ;
glTranslated ( delta_x * scale_factor, -delta_y * scale_factor, 0.0 ) ;
needClear = GL_TRUE;
glutPostRedisplay();
mouse_x = x ;
mouse_y = y ;
}
static void
MouseWheel ( int wheel_number, int direction, int x, int y )
{
double scale = ( direction > 0 ) ? 1.25 : 0.8 ;
glMatrixMode ( GL_MODELVIEW ) ;
glTranslated ( -xwin, -ywin, 0.0 ) ;
glScaled ( scale, scale, scale ) ;
glTranslated ( xwin, ywin, 0.0 ) ;
scale_factor /= scale ;
needClear = GL_TRUE;
glutPostRedisplay();
}
void readConfigFile ( char *fnme ) void readConfigFile ( char *fnme )
{ {
FILE *fptr = fopen ( fnme, "rt" ) ; FILE *fptr = fopen ( fnme, "rt" ) ;
@ -303,6 +356,9 @@ main(int argc, char *argv[])
glutKeyboardFunc(Key); glutKeyboardFunc(Key);
glutSpecialFunc(Special); glutSpecialFunc(Special);
glutDisplayFunc(Display); glutDisplayFunc(Display);
glutMouseFunc(Mouse);
glutMotionFunc(MouseMotion);
glutMouseWheelFunc(MouseWheel);
glutMainLoop(); glutMainLoop();