Adding walk animations

include/components/walk_action.h

@@ -14,6 +14,7 @@ struct walk_action
 {
     gc_component base;
     int acceleration;
+    int idle;
 };
 
 extern const struct walk_action walk_action;

prefabs/player.gcprefab

@@ -6,12 +6,15 @@
         </transform_component>
         <renderer src="assets/sprites/player_sheet.png">
             <Rect width="80" height="100" top="0" left="0" /> 
+            <animation name="walk" frame_count="2" frame_rate="10">
+                <Rect left="80" />
+            </animation>
         </renderer>
         <movable_component />
         <controllable_component />
         <gravity_component force="6250" />
         <keyboard_controller left="16" right="3" jump="57" />
-        <walk_action acceleration="3000" />
+        <walk_action acceleration="3000" idle_trigger="10" />
         <jump_action acceleration="17000" counterforce="6000" step_count="7"/>
         <collision_component layer="11000000" />
         <friction_component value=".5" />

src/components/walk_component.c

@@ -17,6 +17,7 @@ static void ctr(void *component, va_list args)
     struct walk_action *cmp = (struct walk_action *)component;
 
     cmp->acceleration = va_arg(args, int);
+    cmp->idle = va_arg(args, int);
 }
 
 static void fdctr(gc_entity *entity, gc_scene *scene, void *component, node *n)
@@ -24,6 +25,7 @@ static void fdctr(gc_entity *entity, gc_scene *scene, void *component, node *n)
     struct walk_action *cmp = (struct walk_action *)component;
 
     cmp->acceleration = xml_getintprop(n, "acceleration");
+    cmp->idle = xml_getintprop(n, "idle_trigger");
     (void)scene;
     (void)entity;
 }

src/systems/jump_system.c

@@ -33,7 +33,6 @@ gc_entity *entity, float dtime)
         jump->contered = true;
         jump->step = 0;
     }
-
     if (jump->step > 0) {
         mov->acceleration.y += jump->acceleration;
         jump->step--;

src/systems/walk_system.c

@@ -9,27 +9,40 @@
 #include "system.h"
 #include "texture.h"
 #include "vector2.h"
+#include "sprite.h"
 #include "component.h"
 #include "components/movable_component.h"
 #include "components/controllable_component.h"
 #include "components/walk_action.h"
+#include "components/renderer.h"
 #include "utility.h"
 #include <stddef.h>
 
-void walk_update_entity(gc_engine *engine, void *system, \
-gc_entity *entity, float dtime)
+void walk_update_entity(gc_engine *engine __attribute__((unused)), \
+void *system __attribute__((unused)), gc_entity *entity, \
+float dtime __attribute__((unused)))
 {
     struct controllable_component *con = GETCMP(controllable_component);
     struct movable_component *mov = GETCMP(movable_component);
-    struct walk_action *walk = GETCMP(walk_action);
+    struct walk_action *wal = GETCMP(walk_action);
+    struct renderer *rend = GETCMP(renderer);
 
     if (con->moving_left)
-        mov->acceleration.x -= walk->acceleration;
+        mov->acceleration.x -= wal->acceleration;
     if (con->moving_right)
-        mov->acceleration.x += walk->acceleration;
-    (void)system;
-    (void)dtime;
-    (void)engine;
+        mov->acceleration.x += wal->acceleration;
+    if (rend) {
+        if (mov->velocity.x < 0)
+            SET_SIGN(((gc_animholder *)rend->data)->sprite->scale.x, -1);
+        else
+            SET_SIGN(((gc_animholder *)rend->data)->sprite->scale.x, 1);
+        if (rend->type != GC_ANIMREND)
+            return;
+        if (con->moving_left != con->moving_right)
+            rend_set_anim(rend, "walk");
+        else if (-wal->idle <= mov->velocity.x && mov->velocity.x <= wal->idle)
+            rend_set_anim(rend, "none");
+    }
 }
 
 void walk_destroy(void *system)