update method

src/creature.c

@@ -20,6 +20,13 @@ void creature_print(creature *creat)
 	}
 }
 
+void creature_update(creature *creat, int dt)
+{
+	creat->muscles[0].n1.x += 0.06 * dt;
+	creat->muscles[0].n2.x -= 0.01 * dt;
+	creat->muscles[0].n2.y += 0.02 * dt;
+}
+
 static void drawnode(node n, SDL_Renderer *renderer)
 {
 	int w = 30;

src/creature.h

@@ -21,4 +21,5 @@ typedef struct creature
 	int musclec;
 } creature;
 
+void creature_update(creature *creat, int dt);
 void creature_draw(creature *creat, SDL_Renderer *renderer);

src/main.c

@@ -50,8 +50,8 @@ int main()
 		SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0xff);
 		SDL_RenderClear(renderer);
 
-		// Draw creature
-		creat.muscles[0].n1.x += 1;
+		// Update and draw creature
+		creature_update(&creat, delay);
 		creature_draw(&creat, renderer);
 
 		// Presnent and delay