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Update from John:

Browse Source 
I [John] converted everything to double precision to avoid compiler
warnings.  I also added a feature to check for memory leaks under
Windows and removed a memory leak (surprise!).


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@296 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
rkrolib 2003-11-04 15:32:57 +00:00
parent cc38ef07e9
commit 8df7ae3c29
1 changed files with 28 additions and 19 deletions
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47
freeglut/freeglut/progs/demos/Fractals_random/fractals_random.c
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@ -24,6 +24,9 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <math.h> #include <math.h>
#ifdef WIN32
#include <crtdbg.h> // DUMP MEMORY LEAKS
#endif
typedef struct typedef struct
{ {
@ -44,11 +47,11 @@ static AffineTrans *affine ;
char window_title [ 80 ] ; char window_title [ 80 ] ;
/* The amount the view is translated */ /* The amount the view is translated */
float xwin = 0.0, ywin = 0.0 ; double xwin = 0.0, ywin = 0.0 ;
float scale_factor = 1.0 ; double scale_factor = 1.0 ;
/* The current point */ /* The current point */
float current_x = 0.0, current_y = 0.0 ; double current_x = 0.0, current_y = 0.0 ;
/* Signals when a glClear is needed */ /* Signals when a glClear is needed */
static GLboolean needClear = GL_TRUE; static GLboolean needClear = GL_TRUE;
@ -61,8 +64,8 @@ static void draw_level ( int num, double m00, double m01, double m10, double m11
for ( i = 0; i < 10; i++ ) for ( i = 0; i < 10; i++ )
{ {
int random = (rand() >> 10) % num_trans; int random = (rand() >> 10) % num_trans;
float 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 ;
float 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 ) ; glVertex2f ( new_x, new_y ) ;
current_x = new_x ; current_x = new_x ;
@ -80,7 +83,7 @@ Display(void)
/* the curve */ /* the curve */
glPushMatrix(); glPushMatrix();
glScalef(2.5, 2.5, 2.5); glScaled(2.5, 2.5, 2.5);
glColor4f(0.0, 0.0, 0.0, 1.0); glColor4f(0.0, 0.0, 0.0, 1.0);
glBegin ( GL_POINTS ) ; glBegin ( GL_POINTS ) ;
@ -109,7 +112,7 @@ Reshape(int width, int height)
glLoadIdentity(); glLoadIdentity();
xwin = -1.0 ; xwin = -1.0 ;
ywin = 0.0 ; ywin = 0.0 ;
glTranslatef(xwin, ywin, -5.0); glTranslated(xwin, ywin, -5.0);
needClear = GL_TRUE; needClear = GL_TRUE;
} }
@ -128,7 +131,7 @@ Key(unsigned char key, int x, int y)
glLoadIdentity(); glLoadIdentity();
xwin = -1.0 ; xwin = -1.0 ;
ywin = 0.0 ; ywin = 0.0 ;
glTranslatef(xwin, ywin, -5.0); glTranslated(xwin, ywin, -5.0);
break ; break ;
default: default:
@ -144,45 +147,45 @@ static void
Special(int key, int x, int y) Special(int key, int x, int y)
{ {
int changed_settings = 1; int changed_settings = 1;
switch (key) { switch (key) {
case GLUT_KEY_UP : case GLUT_KEY_UP :
glMatrixMode(GL_MODELVIEW); glMatrixMode(GL_MODELVIEW);
ywin += 0.1 * scale_factor ; ywin += 0.1 * scale_factor ;
glTranslatef(0.0, 0.1 * scale_factor, 0.0); glTranslated(0.0, 0.1 * scale_factor, 0.0);
break ; break ;
case GLUT_KEY_DOWN : case GLUT_KEY_DOWN :
glMatrixMode(GL_MODELVIEW); glMatrixMode(GL_MODELVIEW);
ywin -= 0.1 * scale_factor ; ywin -= 0.1 * scale_factor ;
glTranslatef(0.0, -0.1 * scale_factor, 0.0); glTranslated(0.0, -0.1 * scale_factor, 0.0);
break ; break ;
case GLUT_KEY_LEFT : case GLUT_KEY_LEFT :
glMatrixMode(GL_MODELVIEW); glMatrixMode(GL_MODELVIEW);
xwin -= 0.1 * scale_factor ; xwin -= 0.1 * scale_factor ;
glTranslatef(-0.1 * scale_factor, 0.0, 0.0); glTranslated(-0.1 * scale_factor, 0.0, 0.0);
break ; break ;
case GLUT_KEY_RIGHT : case GLUT_KEY_RIGHT :
glMatrixMode(GL_MODELVIEW); glMatrixMode(GL_MODELVIEW);
xwin += 0.1 * scale_factor ; xwin += 0.1 * scale_factor ;
glTranslatef(0.1 * scale_factor, 0.0, 0.0); glTranslated(0.1 * scale_factor, 0.0, 0.0);
break ; break ;
case GLUT_KEY_PAGE_UP : case GLUT_KEY_PAGE_UP :
glMatrixMode(GL_MODELVIEW); glMatrixMode(GL_MODELVIEW);
glTranslatef ( -xwin, -ywin, 0.0 ) ; glTranslated ( -xwin, -ywin, 0.0 ) ;
glScalef(1.25, 1.25, 1.25); glScaled(1.25, 1.25, 1.25);
glTranslatef ( xwin, ywin, 0.0 ) ; glTranslated ( xwin, ywin, 0.0 ) ;
scale_factor *= 0.8 ; scale_factor *= 0.8 ;
break ; break ;
case GLUT_KEY_PAGE_DOWN : case GLUT_KEY_PAGE_DOWN :
glMatrixMode(GL_MODELVIEW); glMatrixMode(GL_MODELVIEW);
glTranslatef ( -xwin, -ywin, 0.0 ) ; glTranslated ( -xwin, -ywin, 0.0 ) ;
glScalef(0.8, 0.8, 0.8); glScaled(0.8, 0.8, 0.8);
glTranslatef ( xwin, ywin, 0.0 ) ; glTranslated ( xwin, ywin, 0.0 ) ;
scale_factor *= 1.25 ; scale_factor *= 1.25 ;
break ; break ;
@ -305,5 +308,11 @@ main(int argc, char *argv[])
printf ( "Back from the 'freeglut' main loop\n" ) ; printf ( "Back from the 'freeglut' main loop\n" ) ;
free ( affine ) ;
#ifdef WIN32
_CrtDumpMemoryLeaks () ; // DUMP MEMORY LEAK INFORMATION
#endif
return 0; /* ANSI C requires main to return int. */ return 0; /* ANSI C requires main to return int. */
} }