I think that I have my jump code and it works pretty good, just asking if you guys could take a look at it and let me know how I could make it better.
Code:
camera_follow(me);
	my.skill42 = floatv(25);

 		
 	VECTOR vFeet;
   vec_for_min(vFeet,me); // vFeet.z = distance from player origin to lowest vertex
 		
	my.STATE = 0;
	
	
	while(1)
	{

     
      
		// adjust entity to the ground height, using a downwards trace
		if(c_trace(my.x,vector(my.x,my.y,my.z-5000),IGNORE_ME | IGNORE_PASSABLE) > 0)
		dist_down= my.z + vFeet.z - target.z; // always place player's feet on the ground
		else
		dist_down = 0;	
		
	   if((dist_down > 0))
		{
		 ent_blend("jumpLS",0,75);	
		 dist_down = clamp(dist_down,0,accelerate(speed_down,10,0.1));
		
		}
		else
	    speed_down = 0;
	    
			//move the entity forward
			var distance =(key_cuu)* 25 *time_step;
			distance = sign(distance)* (abs(distance) + 0.5 * dist_down);
			c_move(me,vector(distance,0,0),vector(0,0,-dist_down),IGNORE_PASSABLE |GLIDE);
			
			
			//rotate player with the left and right keys
			my.pan += (key_cul-key_cur)*5* time_step;
			my.pan += (key_cud) * 5 * time_step;
		
      //default state
		if(my.STATE == 0)
		{
			my.ANIMATION += 2 *time_step;
		   ent_animate(me,"idleSWA",my.ANIMATION,ANM_CYCLE);
			
		}
		//the run state without the sword in hand
		if(my.STATE ==1)
		{
			

			ent_blend("runWS",25,45);
			//animate the player
			my.ANIMATION += 15 * time_step;
			ent_animate(me,"runWS",my.ANIMATION,ANM_CYCLE);
					
		}
		//pressing the move key to make him run with out the sword
		//changing his state
		if((key_cuu == 1)&& my.STATE == 0)
		{
			my.ANIMATION = 0;
			my.STATE = 1;
		}
		else if((!key_cuu)&& my.STATE == 1)
		{
			my.ANIMATION = 0;
			my.STATE = 0;
		}

	  //take the sword out and put it in the hand.
		if(my.STATE ==2)
		{
			my.ANIMATION += 5 *time_step;
			ent_animate(me,"takeSWO",my.ANIMATION,0);
			//blend the state from taking out the sword 
			//to the idle.
			if(my.ANIMATION > 100)
			{
			ent_blend(my.STATE = 4,0,50);
			}
				
		}
		//run with the sword in his hand
		if(my.STATE == 3)
		{
         
			ent_blend("run",25,45);
			//animate the player
			my.ANIMATION += 15 * time_step;
			ent_animate(me,"run",my.ANIMATION,ANM_CYCLE);
			
			
		
		}
		//idle with the sword in hand
		if(my.STATE == 4)
		{
		 
			my.ANIMATION += 2 *time_step;
		  ent_animate(me,"idleSWI",my.ANIMATION,ANM_CYCLE);
			
		}
		//putting the sword away
		if(my.STATE == 5)
		{
			my.ANIMATION += 5 * time_step;
			ent_animate(me,"putSWA",my.ANIMATION,NULL);
			if(my.ANIMATION > 100)
			{
			 ent_blend(my.STATE = 0,0,50);
			}
			
		}
		//the attack state
		if(my.STATE == 6)
		{
			my.ANIMATION += 4 * time_step;
			ent_animate(me,"attack",my.ANIMATION,NULL);
		}
		
		//press the key to change states
		//take out the sword if you are in the idle state
		//with the sword in sheath	
		if((key_t == 1)&& my.STATE == 0)
		{
			my.ANIMATION = 1;
			my.STATE = 2;		
		}
		//running and pull sword at the same time
		if((key_cuu == 1)&& (key_t ==1) && my.STATE == 1)
		{
			ent_blend(my.STATE = 2,25,50);
    	}
		
		//after changing states if you are trying to
		//move with the sword in hand
		if((key_cuu==1)&& my.STATE == 2)
		{
			my.ANIMATION = 1;
			my.STATE = 3;
		}
		//if you have stopped moving
		//play the idle with the sword in the hand 
		else if((key_cuu == 0)&& my.STATE == 3)
		{
			my.ANIMATION = 1;
			my.STATE = 4;
		}
		//run with the sword in hand
		if((my.STATE == 4) && key_cuu == 1)
		{
			my.ANIMATION = 1;
			my.STATE = 3;
		}
		//when your idle is sword in hand 
		//and you want to put it away
		if((key_p == 1) && my.STATE == 4)
		{
			my.ANIMATION = 1;
			my.STATE = 5;
			
		}
	//now you have put the sword away
	//go back to original state and start over again
	if((my.STATE == 5) && key_cuu == 1)
	{
		  
			my.ANIMATION = 1;
    		my.STATE = 1;
   }
   //Press the space key to make the player jump
	if(key_space == 1 && my.STATE == 1 && reached_height == 0)
	{
		 jump_height = minv(25,jump_height + 5 * time_step);
		 //jump_height = c_move(me,0, vector(0,0,jump_height ),GLIDE);
		 my.z = jump_height;
		 ent_animate(me,"jump",25,NULL);
		 ent_blend("hang",25,50);
		 if(jump_height == 25)
		 {
		 	ent_animate(me,"hang",my.ANIMATION,ANM_CYCLE);
		 	reached_height = 1;
		 	beep();
		 	jump_height = clamp(jump_height,0,accelerate(speed_down,10,0.1)); 
		 	ent_animate(me,"land",my.ANIMATION,0);	
		 }
		 else{
		 	speed_down = 0;
		 	ent_animate(me,"land",0,NULL);
		}
   } 
   if(key_space == 0 && my.STATE == 1 && reached_height == 1)
   {
   	reached_height = 0;
   }
   //Press the space key to make the player jump
	if(key_space == 1 && my.STATE == 3 && reached_height == 0)
	{
		 jump_height = minv(25,jump_height + 5 * time_step);
		 //jump_height = c_move(me,0, vector(0,0,jump_height ),GLIDE);
		 my.z = jump_height;
		 ent_animate(me,"jumpSIH",25,NULL);
		 ent_blend("jumpHS",25,50);
		 if(jump_height == 25)
		 {
		 	ent_animate(me,"jumpHS",my.ANIMATION,ANM_CYCLE);
		 	reached_height = 1;
		 	beep();
		 	jump_height = clamp(jump_height,0,accelerate(speed_down,10,0.1)); 
		 	ent_animate(me,"jumpLS",my.ANIMATION,0);	
		 }
		 else{
		 	speed_down = 0;
		 	ent_animate(me,"jumpLS",0,NULL);
		}
   } 
   if(key_space == 0 && my.STATE == 3 && reached_height == 1)
   {
   	reached_height = 0;
   }