Re: TIB: BFS Final Game

To: <ti-basic@lists.ticalc.org>
Subject: Re: TIB: BFS Final Game
From: "Big MAC" <mac@dmi.net>
Date: Sat, 23 Jan 1999 20:20:05 -0800
Delivered-To: ti-basic-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: ti-basic@lists.ticalc.org
Posted-Date: Sat, 23 Jan 1999 20:20:47 -0800 (PST)
Reply-To: ti-basic@lists.ticalc.org

About your Matrix RPG engine. It sounds cool, but what calc is it for?

I also have developed an RPG engine using matrices, but I have taken a different approach. Here's what I did.

I begin by storing a matrix (8x12) into [B]. Next, I run the matrix through a graphics engine program that interprets the number in each matrix spot and draws a certain shape within that 8x8 pixel grid. Here's what some of the coding looks like:

Lbl 0

T+1->T

If T>12

Then

1->T

S+1->S

End

If S>0

Then

2->X: 3->Y ;This is just for later on in the programming.

Return

End

[B](S,T)->D ;Takes current Matrix spot number and stores it into D

8(S-1)->F

8(T-1)->G ;These two commands create the 8x8 pixel grid

If not D ;If D=0, next spot over.

Goto 0

An example of the drawing:

If D=17

Then

Line(G,-F-3,G+4,-F-3

Line(G+4,-F-3,G+4,-F-7

Line(G,-F-4,G+3,-F-4

Line(G+3,-F-4,G+3,-F-7

Goto 0

End

It draws the level pretty fast, actually. When I have the sprite move, I have it move within the 8x8 pixel grid. That way, the program only has to check if the next spot over in the direction the sprite is moving.