}
}
-// the space that it takes for the screen to start scrolling, regarding
-// screen bounds (in pixels)
+/* the space that it takes for the screen to start scrolling, regarding
+/* screen bounds (in pixels) */
+// should be higher than screen->w/2 (320)
#define X_SPACE (400-16)
+// should be less than screen->h/2 (240)
+#define Y_SPACE 200
+
// the time it takes to move the camera (in ms)
#define CHANGE_DIR_SCROLL_SPEED 2000
/* This functions takes cares of the scrolling */
void World::scrolling(double frame_ratio)
{
+ /* Y-axis scrolling */
+
+ float tux_pos_y = tux.base.y + (tux.base.height/2);
+
+ if (scroll_y < tux_pos_y - (screen->h - Y_SPACE))
+ scroll_y = tux_pos_y - (screen->h - Y_SPACE);
+ else if (scroll_y > tux_pos_y - Y_SPACE)
+ scroll_y = tux_pos_y - Y_SPACE;
+
+ // this code prevent the screen to scroll before the start or after the level's end
+ if(scroll_y < 0)
+ scroll_y = 0;
+ if(scroll_y > level->height * 32 - screen->h)
+ scroll_y = level->height * 32 - screen->h;
+
+ /* X-axis scrolling */
/* Auto scrolling */
if(level->hor_autoscroll_speed)
scroll_x = 0;
if(scroll_x > level->width * 32 - screen->w)
scroll_x = level->width * 32 - screen->w;
-
- /* Y-axis scrolling */
-
- float tux_pos_y = tux.base.y + (tux.base.height/2);
-
- scroll_y = tux_pos_y - (screen->h / 2);
-
- // this code prevent the screen to scroll before the start or after the level's end
- if(scroll_y < 0)
- scroll_y = 0;
- if(scroll_y > level->height * 32 - screen->h)
- scroll_y = level->height * 32 - screen->h;
}
void