diff options
| author | Brian Paul <[email protected]> | 2005-01-09 16:52:53 +0000 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2005-01-09 16:52:53 +0000 |
| commit | 429efa9f00b63f08ba4bc76e5b8ba80aceee24ec (patch) | |
| tree | 811037224a7a5efc9cbdc1282e1eff5e38341bdc /progs/redbook/double.c | |
| parent | 1b058a06c2e17e44930ed99a32f46f8e5c484fba (diff) | |
animation rate patch (Marcello Magallon)
Diffstat (limited to 'progs/redbook/double.c')
| -rw-r--r-- | progs/redbook/double.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/progs/redbook/double.c b/progs/redbook/double.c index a41229d12fc..3153c70cc1d 100644 --- a/progs/redbook/double.c +++ b/progs/redbook/double.c @@ -45,6 +45,7 @@ #include <stdlib.h> static GLfloat spin = 0.0; +static GLdouble t0 = 0.; void display(void) { @@ -58,9 +59,18 @@ void display(void) glutSwapBuffers(); } +GLdouble gettime(void) +{ + return (GLdouble)(glutGet(GLUT_ELAPSED_TIME)) / 1000.; +} + void spinDisplay(void) { - spin = spin + 2.0; + GLdouble t, dt; + t = gettime(); + dt = t - t0; + t0 = t; + spin = spin + 120.0*dt; if (spin > 360.0) spin = spin - 360.0; glutPostRedisplay(); @@ -88,7 +98,10 @@ void mouse(int button, int state, int x, int y) switch (button) { case GLUT_LEFT_BUTTON: if (state == GLUT_DOWN) + { + t0 = gettime(); glutIdleFunc(spinDisplay); + } break; case GLUT_MIDDLE_BUTTON: if (state == GLUT_DOWN) |