Add animation support

CMakeLists.txt

@@ -33,6 +33,7 @@ set(SOURCES
   src/dialogs.c
   src/npc.c
   src/events.c
+  src/animation.c
   # ...
 )
 # Shared assets, fx-9860G-only assets and fx-CG-50-only assets
@@ -122,7 +123,7 @@ if("${FXSDK_PLATFORM_LONG}" STREQUAL fx9860G)
 elseif("${FXSDK_PLATFORM_LONG}" STREQUAL fxCG50)
   add_executable(myaddin ${SOURCES} ${ASSETS} ${ASSETS_${FXSDK_PLATFORM}} ${ASSETS_${FXSDK_PLATFORM}_${COLORMODE_cg}} )
 elseif("${FXSDK_PLATFORM_LONG}" STREQUAL fx9860G_G3A)
-  add_executable(myaddin ${SOURCES} ${ASSETS} ${ASSETS_${FXSDK_PLATFORM}} ${ASSETS_${FXSDK_PLATFORM}_${COLORMODE_fx}} )  
+  add_executable(myaddin ${SOURCES} ${ASSETS} ${ASSETS_${FXSDK_PLATFORM}} ${ASSETS_${FXSDK_PLATFORM}_${COLORMODE_fx}} )
 endif()
 
 target_link_options(myaddin PRIVATE -Wl,-Map=Build_Addin.map -Wl,--print-memory-usage)

src/animation.c

@@ -0,0 +1,31 @@
+#include <gint/display.h>
+
+#include "animation.h"
+
+void animation_new(Animation *animation, bopti_image_t *image,
+                   unsigned char len, unsigned short frame_ms) {
+    animation->image = image;
+    animation->frame = 0;
+    animation->len = len;
+    animation->frame_ms = frame_ms;
+    animation->current_ms = 0;
+    animation->width = image->width/len;
+    animation->height = image->height;
+    animation->wrap_dest = 0;
+}
+
+void animation_draw(Animation *animation, int x, int y) {
+    dsubimage(x, y, animation->image, animation->frame*animation->width, 0,
+              animation->width, animation->height, DIMAGE_NONE);
+}
+
+void animation_update(Animation *animation, unsigned short frame_ms) {
+    animation->current_ms += frame_ms;
+    while(animation->current_ms > animation->frame_ms){
+        animation->frame++;
+        if(animation->frame >= animation->len){
+            animation->frame = animation->wrap_dest;
+        }
+        animation->current_ms -= animation->frame_ms;
+    }
+}

src/animation.h

@@ -0,0 +1,27 @@
+#ifndef ANIMATION_H
+#define ANIMATION_H
+
+#include "config.h"
+
+typedef struct {
+    unsigned char frame;
+    bopti_image_t *image;
+    unsigned char len;
+    unsigned short frame_ms;
+    int current_ms;
+    unsigned short width;
+    unsigned short height;
+    unsigned short wrap_dest;
+} Animation;
+
+/* TODO: Doc! */
+void animation_new(Animation *animation, bopti_image_t *image,
+                   unsigned char len, unsigned short frame_ms);
+
+/* TODO: Doc! */
+void animation_draw(Animation *animation, int x, int y);
+
+/* TODO: Doc! */
+void animation_update(Animation *animation, unsigned short frame_ms);
+
+#endif

src/game.c

@@ -211,3 +211,7 @@ void game_get_inputs(Game *game) {
 
 #endif // USB_FEATURE
 }
+
+void game_update_animations(Game *game, unsigned char ms) {
+    animation_update(&game->player.animation, ms);
+}

src/game.h

@@ -5,6 +5,7 @@
 
 #include <gint/display.h>
 #include <stdint.h>
+#include "animation.h"
 
 /* The direction where the player is going to. */
 typedef enum { D_UP, D_DOWN, D_LEFT, D_RIGHT } Direction;
@@ -34,6 +35,8 @@ typedef struct {
     /* the player is interacting with a NPC */
     bool isInteractingWithNPC;
     bool is_male;
+
+    Animation animation;
 } Player;
 
 typedef struct {
@@ -200,4 +203,7 @@ void game_render_indicator(Game *game);
  */
 void game_get_inputs(Game *game);
 
+/* TODO: Doc! */
+void game_update_animations(Game *game, unsigned char ms);
+
 #endif

src/main.c

@@ -28,13 +28,15 @@
 #include <stdlib.h>
 
 extern bopti_image_t player_face_img;
+extern bopti_image_t player_male_img;
 
 extern Map *worldRPG[];
 
 /* Game data (defined in "game.h")*/
 Game game = {
     NULL,
-    {12 * PXSIZE, 36 * PXSIZE, 0, 0, 100, SPEED, false, 0, false, false, true},
+    {12 * PXSIZE, 36 * PXSIZE, 0, 0, 100, SPEED, false, 0, false, false, true,
+        {}},
     {{}, {}, 0},
     false,
     false,
@@ -107,6 +109,9 @@ int main(void) {
     timer_start(timer);
 
     game.map_level = worldRPG[0];
+    animation_new(&game.player.animation, &player_male_img, 3, 250);
+    /* Wrapping back to 1 to skip the idle frame. */
+    game.player.animation.wrap_dest = 1;
     events_init_handler(&game.handler);
     events_bind_variable(&game.handler, (int *)&game.player.life, "life");
     events_bind_variable(&game.handler, &game.mana, "mana");
@@ -189,6 +194,9 @@ int main(void) {
         /* Run the game at max. 50fps */
         while(game.frame_duration < 20)
             sleep();
+        /* Calling it here to get the real frame duration (there is a lot of lag
+        on cg) */
+        game_update_animations(&game, (unsigned char)game.frame_duration);
         /* Reset frame_duration for the next frame */
         game.frame_duration = 0;
     } while(!game.exittoOS); // want to exit ?

src/player.c

@@ -7,6 +7,7 @@
 #include "npc.h"
 
 #include <gint/display.h>
+#include <gint/keyboard.h>
 
 extern bopti_image_t player_male_img;
 extern bopti_image_t player_female_img;
@@ -44,8 +45,15 @@ extern uint32_t nbNPC;
 
 void player_draw(Game *game) {
     Player *player = &game->player;
-    dimage(player->px - P_WIDTH / 2, player->py - P_HEIGHT / 2,
-           player->is_male ? &player_male_img : &player_female_img);
+    clearevents();
+    if(!keydown(KEY_LEFT) && !keydown(KEY_RIGHT) && !keydown(KEY_UP) &&
+       !keydown(KEY_DOWN)){
+        game->player.animation.frame = 0;
+    }
+    player->animation.image = player->is_male ? &player_male_img :
+                                                &player_female_img;
+    animation_draw(&player->animation, player->px - P_WIDTH / 2,
+                   player->py - P_HEIGHT / 2);
 }
 
 void player_move(Game *game, Direction direction) {