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[shermanaquarium] / sherman-aquarium / shermans / bubble.c

diff --git a/sherman-aquarium/shermans/bubble.c b/sherman-aquarium/shermans/bubble.c
new file mode 100644 (file)
index 0000000..4b5a49e
--- /dev/null
+++ b/sherman-aquarium/shermans/bubble.c
@@ -0,0 +1,123 @@
+
+#include <stdlib.h>
+#include <string.h>
+
+
+#include "aquarium.h"
+#include "bubble.h"
+#include "draw.h"
+#include "soundeffects.h"
+
+/* current bubble count */
+static int nr_bubbles;
+
+static Bubble *bubbles = NULL;
+static SA_Image bubbles_image_data;
+
+
+static int bubble_state_change;
+
+static Bubble_settings bubble_settings;
+
+Bubble_settings *bubble_get_settings_ptr(void)
+{
+    return &bubble_settings;
+}
+
+void bubble_exit(void)
+{
+    if(bubbles_image_data.pixbuf != NULL)
+       g_object_unref(bubbles_image_data.pixbuf);
+    memset(&bubbles_image_data, 0, sizeof(SA_Image));
+}
+
+void bubble_init(void)
+{
+    AquariumData *ad;
+
+    ad = aquarium_get_settings_ptr();
+
+    nr_bubbles = 0;
+    bubble_state_change = ad->ymax / (BUBBLES_FRAMES - 1);
+
+
+    if(bubbles!=NULL)
+       g_free(bubbles);
+
+    bubbles = g_malloc0(sizeof(Bubble) * bubble_settings.max_bubbles);
+
+    /* Load bubbles */
+
+    load_image("bubbles.png", &bubbles_image_data, BUBBLES_FRAMES);
+
+}
+
+void bubble_update(void)
+{
+    int i, x, y;
+    int seq;
+    AquariumData *ad;
+
+    ad = aquarium_get_settings_ptr();
+
+
+    for(i = 0; i < nr_bubbles; i++){
+       aquarium_clean_image(bubbles[i].x, bubbles[i].y,
+                            bubbles_image_data.width, 
+                            bubbles_image_data.height);
+    }
+
+
+    /* make a new bubble, if needed */
+    if(((nr_bubbles < bubble_settings.max_bubbles)) && (g_rand_int_range(ad->rnd, 0, 100) <= 32)) {
+       bubbles[nr_bubbles].x = ad->viewpoint_start_x + (g_rand_int_range(ad->rnd, 0, ad->xmax));
+       bubbles[nr_bubbles].y = ad->viewpoint_start_y + ad->ymax;
+
+       bubbles[nr_bubbles].speed = g_rand_double_range(ad->rnd, 1.0/13.0, 12.0/13.0);
+
+       nr_bubbles++;
+    }
+
+
+
+    /* Update and draw the bubbles */
+    for (i = 0; i < nr_bubbles; i++) {
+
+       /* Move the bubble vertically */
+       bubbles[i].y -= bubbles[i].speed;
+
+       /* Did we lose it? */
+       if (bubbles[i].y < ad->viewpoint_start_y) {
+           /* Yes; nuke it */
+           bubbles[i].x = bubbles[nr_bubbles - 1].x;
+           bubbles[i].y = bubbles[nr_bubbles - 1].y;
+           bubbles[i].speed = bubbles[nr_bubbles - 1].speed;
+           nr_bubbles--;
+
+           /* We must check the previously last bubble, which is
+            * now the current bubble, also. */
+           i--;
+           continue;
+       }
+
+       /* Draw the bubble */
+       x = bubbles[i].x - ad->viewpoint_start_x;
+       y = ((int) bubbles[i].y) - ad->viewpoint_start_y;
+
+       /* calculate bubble sequence - 0 to 4 (determine bubble sprite idx) */
+       seq = y / bubble_state_change;
+
+       /* draw the bubble, using offset-to-center calculated from current
+        * sequence, and make the bubble bigger as we go up. 120 - alpha */
+
+       if(seq < BUBBLES_FRAMES){
+           aquarium_draw_pic_alpha(&bubbles_image_data, bubbles_image_data.width, 
+                          bubbles_image_data.height, x, y,
+                          seq, 120);
+       }
+
+    }
+
+    /* Sometimes play bubble sound */
+    sound_bubbles();
+}