Here how to do :
1/ In the "Project Settings > User Constants", create a new constant named "OBJECT_PLAYER_MELEE" with the value "1".
2/ Create a new script "b_create_melee_weapon.asm" in the "GameEngineData\Routines\Basic\ModuleScripts\InputScripts" folder, with this code:
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LDA gameHandler AND #%00100000 BEQ notNPCstate_attack JMP doneAttacking notNPCstate_attack: LDA weaponsUnlocked AND #%00000001 BNE canAttack JMP doneAttacking canAttack: LDX player1_object GetCurrentActionType player1_object CMP #$03 BNE notAlreadyAttacking JMP doneAttacking notAlreadyAttacking: ;;; don't attack if already attacking. ;;; do we have to check for hurt here? ;;;;; Here, we WOULD create melee ChangeObjectState #$03, #$02 LDA Object_movement,x AND #%00001111 STA Object_movement,x LDA #$00 STA Object_h_speed_hi,x STA Object_h_speed_lo,x STA Object_v_speed_hi,x STA Object_v_speed_lo,x LDA Object_x_hi,x STA temp LDA Object_y_hi,x STA temp1 LDA Object_movement,x AND #%00000111 STA temp2 TAY LDA Object_x_hi,x SEC SBC #$08 ;; <<--- HERE, you have to set width of melee weapon in HEX (1 tile = 8px, 8 in decimal = #$08 in hex. Use the binary <-> hex converter plugin) STA temp LDA Object_scroll,x SBC #$00 STA temp3 LDA temp ;;; offset x for creation CLC ADC weaponOffsetTableX,y STA temp LDA temp3 ADC #$00 STA temp3 LDA Object_y_hi,x CLC ADC weaponOffsetTableY,y SEC SBC #$08 ;; <<--- HERE, you have to set height of melee weapon in HEX (1 tile = 8px, 8 in decimal = #$08 in hex. Use the binary <-> hex converter plugin) STA temp1 CreateObject temp, temp1, #OBJECT_PLAYER_MELEE, #$00, temp3 meleeCreated: ;;;; x is now the newly created object's x. LDA Object_movement,x ORA temp2 STA Object_movement,x ;PlaySound #SND_SLASH doneAttacking: RTS
3/ In the hierarchy, under "Game Objects", select and setup your "Melee" object:
In the "Details Object", you can its left / right animation :
Then, set it as "Player weapon".:
Set the "Action step 0" to "Ignore gravity" and to "DestroyMe" after the end of the Action, give a timer value of "1" (if you have an animation, you could you the "end of animation" with the right animation speed):
And don't forget to set the Bounding Box!
4/ Now, select the "Player" object, go the "Object Details". For the "Action Step 03", uncheck the "Harmfull invicible", set to "GoToFirst" the end of Action, give a timer value of "1", at least the value of the weapon timer (if you have an animation, you could you the "end of animation" with the right animation speed):
5/ In the hierarchy, select the "Game Object" element, and set the position (the Offset) of your Melee object with your Player for all its facing directions:
6/ In the "Scripts > input Scripts" add the "b_create_melee_weapon.asm" script.
7/ In the "Input Editor", assign it to your button ("Press" "B" button).
8/ In your "Project Settings > Script Settings", select the "Use Sprite Based Weapon" element and assign it the "Routines\Basic\ModuleScripts\BlankScript.asm":
9/ Make a new script "PreDraw_DC.asm" in your "GameEngineData\Routines\Basic\ModuleScripts\MainScripts\ScrollingPlatformer" folder, with this code (it's the same script that the PreDraw, I just removed all the part about the weapon):
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;; sprite pre-draw ;;; this will allow a user to draw sprites ;;; before object sprites are drawn. ;;; keep in mind, there are still only 64 sprites ;;; that can be drawn on a screen, ;;; and still only 8 per scan line! ;;; you can use DrawSprite macro directly using the following scheme: ;DrawSprite arg0, arg1, arg2, arg3, arg4 ;arg0 = x ;arg1 = y ;arg2 = chr table value ;arg3 = attribute data ;arg3 = starting ram position ;; x and y are the direct positions on the screen in pixels. ;; chr table value is which sprite you'd like to draw from the ppu table. ;; attribute data is a binary number (starts with #%), and here are how the bits work: ;;; bit 7 - Flip sprite vertically ;;; bit 6 - Flip sprite horizontally ;;; bit 5 - priority (0 in front of background, 1 behind background) ;;; bit 4,3,2 - (null) ;;; bit 1,0 - subpalette used (00, 01, 10, 11) ;;; for starting ram position, use spriteOffset. ;; this is set to 0 just before entering this script (or 4 if sprite 0 hit was used). ;; ***remember to increase spriteOffset by 4 for every sprite that is drawn, ;; including after the last one drawn*****, so that the first object's sprite begins ;; in the next available spot. ;; I have created a macro function to handle updating to the next sprite. So, to update to the next sprite position, ;; all that you have to do is use the function UpdateSpritePointer ;;EXAMPLE: ; DrawSprite #$80, #$80, #$10, #%00000000, spriteOffset ; UpdateSpritePointer ;;;; DRAW SPRITE ZERO FOR SPRITE ZERO HIT LDA gameState CMP #GS_MainGame BNE + ;dont draw sprite zero ;DrawSprite #$f8, #$1e, #$7F, #%00000000, spriteOffset ;248 30 127 bit 5 = priority DrawSprite #SPRITE_ZERO_X, #SPRITE_ZERO_Y, #SPRITE_ZERO_INDEX, #%00100000, spriteOffset UpdateSpritePointer ;dont draw sprite zero. + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
10/ In your "Project Infos", you can check the "Weapon 1 unlock" if you want your player to have the weapon at launch (else he will have to get it from an NPC):
11/ Last thing, you should do a small modification in your StartMovingPlayerxxx script, just moving the "++" from before the "FaceDirection" line, to AFTER "FaceDirection" line.
For exemple, StartMovingPlayerRight.Asm should be like this :
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;;;;; START MOVING PLAYER RIGHT: ;;;;; We will use this when the right button is pressed. ;;;;; If we are already showing the walking animation, which is for this module ;;;;; action step 1, we will skip changing to the walking state. LDX player1_object GetCurrentActionType player1_object CMP #$02 ;; if the state is invincible BEQ ++ ; skip movement if attacking CMP #$03 BEQ ++ ;skip if we are casting spell CMP #$01 BEQ + ;; if the action type already equals 1, jump forward ChangeObjectState #$01, #$04 + ;;;;;; Then, we will begin moving. StartMoving player1_object, MOVE_RIGHT ;;;;;; Lastly, we will change the facing direction. FaceDirection player1_object, FACE_RIGHT ++ RTS
Note: you should get rid of your GetSword pickup object, make it a health pickup or anything else you want (change the script assign to the "Power Up 00" in the "Project Settings > Script Settings").