Fix vsync

src/gl_draw.c

@@ -26,6 +26,7 @@
 
 #include "err.h"
 #include "filereader.h"
+#include "gl_draw.h"
 #include "half_edge.h"
 
 #include <GL/glut.h>
@@ -262,7 +263,7 @@ static void draw_Planet_1(void)
 	glColor3f(1.0f, 0.0f, 0.0f);
 
 	/* A rotation (full 360°) once a day is much
-	 * too fast you woulden'd see a thing */
+	 * too fast you wouldn't see a thing */
 	glRotatef((ROT_FACTOR_PLANET * day) / rot_fac_day, 0.0f, 0.0f, 1.0f);
 	glutWireSphere(1.0f, XY_WIRE_COUNT, XY_WIRE_COUNT);
 	glRotatef((ROT_FACTOR_PLANET * day) / rot_fac_day, 0.0f, 0.0f, -1.0f);
@@ -490,7 +491,7 @@ void animate()
 		day = 0;
 	}
 
-	usleep(30000); /* some very basic VScny to see the movement better */
+	glutTimerFunc(TIMERMSECS, animate, 0);
 	glutPostRedisplay();
 }
 

src/gl_draw.h

@@ -31,6 +31,12 @@
 #include <GL/glu.h>
 
 
+/**
+ * Vsync timer for animate() function
+ */
+#define TIMERMSECS 25
+
+
 void init(char const * const filename);
 void display(void);
 void reshape(GLsizei w, GLsizei h);

src/main.c

@@ -73,7 +73,7 @@ int main(int argc, char *argv[])
 	glutKeyboardFunc(keyboard);
 	glutReshapeFunc(reshape);
 	glutDisplayFunc(display);
-	glutIdleFunc(animate);
+	glutTimerFunc(TIMERMSECS, animate, 0);
 	glutMainLoop();
 
 	return 0;