Sector-based game

Okay I have a new idea for my game. I want to use a single picture as the map (rather than tiles in bitblt). I want this to be a topview but from an angle (sorta like CHASE MODE in action games). Anyone ever play Darksun ? well thats what I mean. I will have the pictures for all of the players and monsters etc. I plan on defining walls and special areas by SECTOR. Like I'd draw a square on the area i want a wall at, and combine this with the bmp map. The sector would be a square with four points, the points being the pixel (X,Y) coords for ease of use. HELP

When you "Draw" on the map to create walls, just put the drawings into another bitmap image. "Walls" should be black, anything else, white. Then, in the game, each time a character moves, check to see what color he is on, in the other bitmap. If you get a 0 for the color, you cant go there.

Z.

You could use GDI regions to list up the rects, and then perform region operations like combinergn, rectinrgn and pointinrgn to speed up your game, rather than coding the equivalents in vb.

you could just load the map up, and have the map have values, 0 and 1.
0 is walkable. 1 isn't.. (or you could set speeds, 0 - no movement, 1 - slow, 5- fast

then just load that in an array

then when your program calls the movement of the player.. say it's moving 2 left.
it'll move ONE LEFT, is it moveable? , if it is 0, then just STOP and don't move there

if you can move.. then move, and then check the next square,
Rather, rinse.. repeat

or you can check what image is on your map.. and if your charcater runs into the side of the image.. then just stop

this probably isn't the best way.. but oh well