From 43286c06a71d3da5a89832f83e621f94016cc9d4 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Tue, 23 Sep 2003 14:17:13 +0000 Subject: [PATCH] added needClear flag to take care of initial window clear and window resize clears git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@204 7f0cb862-5218-0410-a997-914c9d46530a --- progs/demos/Fractals_random/fractals_random.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/progs/demos/Fractals_random/fractals_random.c b/progs/demos/Fractals_random/fractals_random.c index d80d20e..8992d1e 100644 --- a/progs/demos/Fractals_random/fractals_random.c +++ b/progs/demos/Fractals_random/fractals_random.c @@ -50,6 +50,9 @@ float scale_factor = 1.0 ; /* The current point */ float current_x = 0.0, current_y = 0.0 ; +/* Signals when a glClear is needed */ +static GLboolean needClear = GL_TRUE; + static void draw_level ( int num, double m00, double m01, double m10, double m11, double n0, double n1 ) { /* Draw a fractal transformed by "M", "N" as passed in */ @@ -70,6 +73,11 @@ static void draw_level ( int num, double m00, double m01, double m10, double m11 static void Display(void) { + if (needClear) { + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + needClear = GL_FALSE; + } + /* the curve */ glPushMatrix(); glScalef(2.5, 2.5, 2.5); @@ -99,6 +107,7 @@ Reshape(int width, int height) xwin = -1.0 ; ywin = 0.0 ; glTranslatef(xwin, ywin, -5.0); + needClear = GL_TRUE; } static void @@ -119,7 +128,7 @@ Key(unsigned char key, int x, int y) break ; } - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + needClear = GL_TRUE; glutPostRedisplay(); } @@ -169,7 +178,7 @@ Special(int key, int x, int y) break ; } - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + needClear = GL_TRUE; glutPostRedisplay(); } @@ -256,8 +265,6 @@ main(int argc, char *argv[]) glClearColor(1.0, 1.0, 1.0, 1.0); - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - glutReshapeFunc(Reshape); glutKeyboardFunc(Key); glutSpecialFunc(Special); -- 1.7.10.4